Honda-SOHC
SOHC.co.uk Forums => CB750 => Topic started by: Voxonda on January 02, 2007, 06:18:13 PM
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Hello all,
First of all a very healthy and safe 2007.
Like to inroduce myself at this forum. My name is Rob Bosschieter and come from the Netherlands. Ride bikes for 32 years, Jes... am I that old?! Have 2 CB900F's, a beautiful French, sorry for that, Voxan Caferacer, and am building a replica of a '74 endurance racer out of a scrap CB750SOHC. I am planning to give this bike a go at the CLASSIC BIKERS DAYS at the famous Franchorchamps circuit in Belgium. At this moment I'm building the engine and most of the work on the rest is done. Try having the frame sandblasted over the coming weeks and the tank, seat and fairing ready for painting.
Hope I can find out how to put a picture in.
Best regards, Rob (http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/020906_006.jpg)
Post edited by: Voxonda, at: 2007/01/02 18:21
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Hi Rob, welcome. That's a very nice looking bike. What will the colour scheme be for the tank and tail?
regards, Phil
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Rob,
Welcome. I look forward to seeing the bike when it is finished. When is the Spa race?
Jim.
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pae wrote:
Hi Rob, welcome. That's a very nice looking bike. What will the colour scheme be for the tank and tail?
regards, Phil
Hello Phil,
The colour scheme will be like the JOEY DUNLOP helmet-scheme, so yellow and black. Think it will look great together with my (original) \"Yer-Maun\" replica helmet. The original bike also was yellow/black, but a slightly different shade of yellow. It is not my intention to build an exact replica but a bike that is build 'in the spirit' of the '70 24 Hour of OSS in the Netherlands.
regards, Rob
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jimshea wrote:
Rob,
Welcome. I look forward to seeing the bike when it is finished. When is the Spa race?
Jim.
Hello Jim,
The Spa weekend is held over 3 days, 29 & 30th of June and 1st of July. It is not really a race but more of a 'memorial' for the bikes, and riders from the past.
Regards, Rob
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Hi Rob,
Like what your doing, What Forks and wheels do you have in that frame.
Welcome
John
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JonnyB wrote:
Hi Rob,
Like what your doing, What Forks and wheels do you have in that frame.
Welcome
John
Hello John,
This is a picture of a few months ago. It's a K2 frame which I have strengthed and lightened a bit. Front fork is of a 750DOHC because of the better mounting possibility for the front brakes, which are now GRIMECA, which lookalike the Lockheed on the back. On the picture are Brembo's. Front wheel is a SMAC 18\" magnesium wheel, which I am not going to use because of the age of the wheel. Magnesium tend to corrode over the years and the possible cracking of the wheel doesn't appeal to me. Use it just for 'static' showing. Have a Kim Tap alloy wheel in front now. On the back is a German RONAL wheel. Have build a square section swingarm myself. (http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Gietwiel_19_inch.jpg)
This is the Kim Tap 19\" front wheel
Have made a lot of pictures of the building process.
Best regards, Rob
Post edited by: Voxonda, at: 2007/01/04 17:05
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Here one of the nearly finished swingarm, just sprayed in primer.
Regards, Rob (http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Afb003.jpg)
Post edited by: Voxonda, at: 2007/01/04 18:10
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Good evening,
Does anyone know the free length of the valvesprings of a '76 F1 engine?
Thanks for your help.
Post edited by: Voxonda, at: 2007/01/05 19:09
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Here a pic of the swingarm in place, but not yet painted, like the rest of him.
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Heftafel_008.jpg)
Post edited by: Voxonda, at: 2007/01/07 22:01
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Just received my new Scitsu rev counter, Think it looks great. Maybe a bit optimistic on the rev scale.
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Scitsu1.jpg)
Post edited by: Voxonda, at: 2007/01/09 08:11
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Here's one with the fairing:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/040906_006.jpg)
With my youngest on board. Still with the standard swingarm.
Post edited by: Voxonda, at: 2007/01/09 19:34
Post edited by: Voxonda, at: 2007/01/09 19:35
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Looking good my man, looking good.
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uk_kev wrote:
Looking good my man, looking good.
Thanks mate.
Wait 'till you see the latest version. Have to make new picture's though and am a bit disabled at this moment thanks to a unwilling knee.
Regards, Rob
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Voxonda wrote:
Does anyone know the free length of the valvesprings of a '76 F1 engine?
I don't think the F1 valve assembly change much from the orginal design. I'vr been using the figures:
Inner springs 38.1 mm, with a wear limit of 37.0 mm
Outer springs 41.2 mm, with a wear limit of 40.0 mm
BTW where did you get the fairing from
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JonnyB wrote:
Voxonda wrote:
Does anyone know the free length of the valvesprings of a '76 F1 engine?
I don't think the F1 valve assembly change much from the orginal design. I'vr been using the figures:
Inner springs 38.1 mm, with a wear limit of 37.0 mm
Outer springs 41.2 mm, with a wear limit of 40.0 mm
BTW where did you get the fairing from
Hey Johnny,
That's odd, your figures are the same as what is in my '74 Workshop Owners Manual, but.......I measured the inner springs 40.1 mm, and the outer springs at 43 mm! With the help of a friend, who own's a shop in Holland specialized in SOHC's, we found in a supplement, of a '76 WOM about the F1 engines, that the springs are indeed longer!!!!!!!!!!!!!!!!!
Well that's sorted.
The fairing is a copy of the ones sold by Airtech in the USA, but I bought it in France. Personally I like it better then the one from Mead Speed.
Regards, Rob
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/a5_1_b.jpg)
Post edited by: Voxonda, at: 2007/01/10 12:52
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Could they be the same as F2 springs, my manual says F2 specs are:
Inner 40.3mm, wear limit 39.14mm
Outer 43.05mm wear limit 41.75
Post edited by: JonnyB, at: 2007/01/10 15:14
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JonnyB wrote:
Could they be the same as F2 springs, my manual says F2 specs are:
Inner 40.3mm, wear limit 39.14mm
Outer 43.05mm wear limit 41.75
Post edited by: JonnyB, at: 2007/01/10 15:14
Good evening JonnyB,
That could well be, think the F1 was 'a step up' to the F2, although in my opinion the F2 was not as reliable as it's predecessor.
Thanks, Rob
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Here made a fix to keep the head during polishing and grinding of the valves.
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Kopopspannen.jpg)
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Just put some VHT on it:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Cilinderkop_001.jpg)
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Just had to put in on to see how it's going to be:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Blok.jpg)
Must do the rest can't hardly wait to hear it 'scream'.
Post edited by: Voxonda, at: 2007/01/12 17:39
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I''ve never seen a point cover like that before ,(\"JapAuto\") wher did you get it from, it looks better than my dinted chrome one
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Hey,
Never heart of JAPAUTO????, where one of the biggest 'French'honda dealers and tuned some beautiful endurance racers in the '70 and '80's.
This one won the 24 hour of the Bol d'or in the early 70's:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/m_Japauto.jpg)
Look at the ignition cover.
I bought it in France through the Japauto Club.
Post edited by: Voxonda, at: 2007/01/13 17:32
Post edited by: Voxonda, at: 2007/01/14 10:59
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Her a pic of the engine with 'sanwichplate', to accomodate the oillines, and screw-on (Vfr) oilfilter:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Te_koop_007.jpg)
Post edited by: Voxonda, at: 2007/01/14 18:02
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Here one of the state he's in right now:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Tank_002.jpg)
With the new Grimeca brakes, alright without the mountingplates, and brakelines and, steel, fueltank.
Post edited by: Voxonda, at: 2007/01/14 18:05
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The bike is looking fantastic; just imagine when it's painted. Are you going to have a 4 into 1 pipe?
Jim,
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Hey Jim,
Thanks, can hardly wait myself to have him painted, but first have to put some small bits and pieces together before I dismantle it. Am busy with mounting some 320 mm Yamaha TZ750 discs on for some serious stopping power. Well there will not be a 4 into 1, but a 4 into 2 into 1. Have changed some headers of a cb900's 4 - 1 and made some stainless collectors and have had a Dunstall replica megaphone from my 2 boys. Will have it painted black.
Will show it when it's ready.
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/10_1.JPG)
Regards,
Rob
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I mean real stopping power, Yamaha TZ500/700/750
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Bought myself, through Ebay, an extra streamline. It'sa replica of one from a RCB1000 Endurance racer.
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/967c_1_b.jpg)
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Here's the original:
Post edited by: Voxonda, at: 2007/01/22 16:43
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Voxonda wrote:
Here's the original:
Post edited by: Voxonda, at: 2007/01/22 16:43
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/chemarin78sm.jpg)
That's him.
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What do you think of this 'solution' for attachment of the headers?
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Uitlaatbevestiging_small.jpg)
Post edited by: Voxonda, at: 2007/01/26 20:36
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Also like to show my latest:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/1.jpg)
Post edited by: Voxonda, at: 2007/01/26 20:44
Post edited by: Voxonda, at: 2007/01/26 20:45
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Oh man, what a fantastic looking bike.
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OK, now I am confused! you have a CR rep and you are building the other one as well?? That is just greedy! :) ;)
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G'd evening,
Just a small update on the racebike, put the new fairing on for size and am very pleased with it. Bought some Dzus fasteners and am making some new mounting brackets for it. Sorry for the 'poor' photo.
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/RCB_small.jpg)
Greetings, Rob
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Some tiny work on the lathe. A nut for the rear axle (gained 28 gr!) and spacers for the front disks. I just love Aluminium.
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Kroonmoer_small.jpg)
See ya.
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Today received my set of Dzus quick release fasteners to mount the bodywork.
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Dzus.jpg)
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Hey guys,
How is it over there? Just wandering, am sitting in a lovely French village enjoying a short vacantion with my wife.
Will be making some progress next week.
Best regards, Rob
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Rob,
It's bloody cold!!
Good luck with the rest of the project; it is great to see it gradually coming together, keep the pics coming.
Jim.
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This weekend I will try to shoot some pictures of both of the bikes and will post some here.
You'll be hearing from me!
Greetz Rob.
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Luv' this view:
Can't get .bmp pic's in!
Ok tomorrow then!
Post edited by: Voxonda, at: 2007/02/17 21:20
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Sorry Vox, JPGs and Gifs only,
John
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OK, I get it!
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Me.jpg)
Is that me? Is that bike small or???
Post edited by: Voxonda, at: 2007/02/18 19:41
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Here is one without the fairing:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Fairingless.jpg)
Need to do some small modifications, specially mounting a scitcu rev counter and oil pressure gauge and cleaning up some parts.
Post edited by: Voxonda, at: 2007/02/18 19:47
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Looks great; is that bike half scale or are you a big bloke?:)
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Listen to the music:
http://www.youtube.com/watch?v=zXXuEvavRFM
See ya, Rob
Post edited by: Voxonda, at: 2007/02/21 18:37
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This week I dismantled the 'replica' bike to have the frame sandblasted and painted, so I can start with building up the bike. Changed to another set of clipons because had to move the brake and clutch lever more to the inside because of the 'endurance' fairing. Will show some pictures of the proces.
See ya, Rob
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Hey overthere,
It's a bit slow because I'm waiting for the blasted and painted frame so I can begin to build the bike. But for my other bike, the 'Hailwood' I bought a K&J box swingarm, build in Germany. Although it was originally for a Kwacker, I will make it fit and redo the chainadjusters.
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/K_J_swingarm.jpg)
Just had no time to build anotherone myself.
Post edited by: Voxonda, at: 2007/02/28 21:14
Post edited by: Voxonda, at: 2007/02/28 21:15
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Hey people,
It's been awhile but that doesn't mean I am not doing anything. While waiting for my frame to come back from the painter, I'm working on the other one. Changed the position of the rev counter, because it interferred with the brake- and gas cables. Just made a bracket from stainless and some alloy mounting studs.
Post edited by: Voxonda, at: 2007/03/08 22:54
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Forgot the pic, sorry;
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Afb013.jpg)
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And mounted it:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Afb014.jpg)
On the pic it looks like it's position is to flat but I've got a good view of the counter.
Greetz, Rob
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Still no sign of my freshly painted frame, so I keep on working on the other bike. Have to change the exhaust system because of the noise level of the 4 megga's. Keep running into trouble with the 'guys in blue'. Since there are not a lot of aftermarket systems available anymore, have to build one myself. Am building a Yoshimura look-a-like 4 into 1.
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/pops_1.jpg)
Like this one.
Post edited by: Voxonda, at: 2007/03/21 18:34
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Using the original items because of the fine flowing curves it's starting to look like something.
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/4in1.jpg)
Try to keep the oilfilter accessable
Post edited by: Voxonda, at: 2007/03/21 18:42
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One from the side with a collector.
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/4in1-eff866752f36b76a8452aba0fc356037.jpg)
You can clearly see the curved lines.
Greetz. Rob
Post edited by: Voxonda, at: 2007/03/21 18:40
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At last, after 3 weeks, I got my powdercoated frame back and have started the final assembly:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/1small.jpg)
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Have put on the frontstay and seatmountings and footrests:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/5.jpg)
Greetz, Rob
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And now it's back on it's feet:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/small18.jpg)
Best regards, Rob
Post edited by: Voxonda, at: 2007/04/09 14:25
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And the other one is coming along also:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/small001.jpg)
Post edited by: Voxonda, at: 2007/04/09 14:27
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It's been some time ago, but I keep following this forum. Still busy with the replica's. Here's a update: Changed wheels, build a 4 into 1 'screamer', a bit loud, but that saves lives isn't it? Rebuild the front calipers, made some brake pistons on the lathe. Put on a new AVON Roadrider. There is more to come this week. Will keep you posted.
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Konus01.jpg)
Cheers, Rob
Post edited by: Voxonda, at: 2007/05/23 20:53
Post edited by: Voxonda, at: 2007/05/24 06:58
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I do like them mags Rob
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Thanks Johnny,
Like them too and found another 18\" front, just like the rear, so I have a complete set of RONAL's. So that should be nice.
Cheers, Rob
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At last I've received my Japauto seat and front fender.
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/frame_014b.jpg)
Post edited by: Voxonda, at: 2007/05/25 14:02
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Complete with 'luncheon-box':
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/frame_016b.jpg)
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And one from the other side:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/frame_015b.jpg)
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And a nice new gimmick:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/keihinCR29mm.JPG)
Keihin CR 29mm.
Greetings Rob
Post edited by: Voxonda, at: 2007/05/25 14:09
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And mounted on the second engine:
Picture to big!!
Hope you like it.
Cheers, Rob
Post edited by: Voxonda, at: 2007/05/31 21:35
Post edited by: Voxonda, at: 2007/05/31 21:36
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Hope this works:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Afb115b.jpg)
See ya
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Have put the Keihin's on the Japauto, even looks fast just standing still.
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Keihin22.jpg)
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Made the muffler(???) in stainless, what do you think, it looks OK?
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/totaal1.jpg)
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Looks good from here. Can you give us some close-ups and details of construction.
I have a 500/4 with home-made muffler and would like to compare.
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Hello Steve,
I will show some picture's and hope you can see what you want:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Afb117.jpg)
First made a template for the conical pipe and handbend it into shape.
Made a bracket for the rear mounting and expanded a pipe for mount the 'muffler' over the exhaustpipe.
Post edited by: Voxonda, at: 2007/06/06 21:55
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Then TIG-welded it together:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Afb119.jpg)
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After that I made a Alloy endcap on the lathe, and bolted it to the muffler:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Demper_met_tegenkonus.jpg)
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So then I made a bracket to mount it to the bike:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Afb126.jpg)
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Rear view of the endcap:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Afb125.jpg)
Hope this helps a bit.
Cheers, Rob
PS, the pic's are not sharp, made them by telephone, sorry for that!
Post edited by: Voxonda, at: 2007/06/06 22:04
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Nice piece of work. I'm very envious of you guys who can fabricate stuff like this.
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SteveD CB500F wrote:
Nice piece of work. I'm very envious of you guys who can fabricate stuff like this.
Thanks Steve, I think you're not that envious if you know how much is going wrong before it works. Sometimes you just have to do things and learn along the way, although it helps if you got the tools, or at least some of it.
Cheers, Rob
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Today I purchased a nice Big-bore kit for the replica engine. A 65.5 mm bore gives a healhty 850cc:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/piston_20set_20x.jpg)
Should work nice together with the CR's.
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At last 'The monster of Frankenstein' is coming to life:
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Kuipmontage_01.jpg)
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And another one. I have not yet mounted the bottompart of the streamline, and have to find, or fabricate, a screen for it.
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Kuipmontage_02.jpg)
What do you think of it?????
Cheers, Rob
Post edited by: Voxonda, at: 2007/06/17 18:02
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Finally I managed to put the lower part on, guite a struggle. But seems to fit OK.
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Volle_kuip_GB.jpg)
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Got my tank back from the painter, dent free. sprayed in primer.
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Graeme_02.jpg)
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Put some foglights on, and my eldest, cause he's a lot more handsome than me.
(http://www.honda-sohc.co.uk/components/com_joomlaboard/uploaded/images/Graeme_03.jpg)
Cheers.
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Hey overthere,
It's been a bit slow with the bikes, but now we're back in business. Next week the tank and seat will be sent for painting and after that the seat will be covered with leather. am waiting for some small bit's for the Keihin CR's (the levers for the start aid, not a choke but it actual richens the fuel mixture). After that I will concentrate on the fairing.
Cheers, Rob
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Since I'm waiting for some Keihin parts, I went on working on the other bike. It has got a quarter fairing now and have changed the seating position in a more comfortable sit-up and beg position. Don't know how to show picture's.
Maybe someone can explain?
Cheers Rob
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Since I'm waiting for some Keihin parts, I went on working on the other bike. It has got a quarter fairing now and have changed the seating position in a more comfortable sit-up and beg position. Don't know how to show picture's.
Maybe someone can explain?
Cheers Rob
Vox, you need to get a photobucket.com account and post the IMG link that is generated on that site into your message after you upload the photo onto the photobucket site
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Thanks Dave, let's see if it works for me.
(http://i238.photobucket.com/albums/ff74/voxonda/Afb238.jpg)
(http://i238.photobucket.com/albums/ff74/voxonda/Situpandbeg004.jpg)
Cheers, Rob
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Doesn't work properly Rob. I'm not an admin here so can't edit your post - you need to use the (http://and) tags rather than just posting the URL. That way the photos load straight onto the page.
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Doesn't work properly Rob. I'm not an admin here so can't edit your post - you need to use the (http://and) tags rather than just posting the URL. That way the photos load straight onto the page.
Hey Steve, you're right, now I know how.
Thanks, Rob
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Doesn't work properly Rob. I'm not an admin here so can't edit your post - you need to use the (http://and) tags rather than just posting the URL. That way the photos load straight onto the page.
Hey Steve, you're right, now I know how.
Thanks, Rob
I can
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Hello Dave,
Thanks for the warning. But I am a bit confused now, because I posted the pic's with the IMG the last time. Am not a wizard with computers though so maybe I'm doing something completely wrong. ???
I have removed the link, so what more can I do?
Thanks in advance,
Cheers, Rob
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I don't understand either Dave. If Rob has used the {ing}{/img} tags (which he has) how is that insecure?
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Hello guys,
It's a bit slow overhere, a lot of, free, time wasted at work. Have to make some money to put in the bikes. Have bought myself and my wife a Vf 1000 F2 to ride together in weekends and holidays. Lovely engine.
But managed to put life into the, Japauto, beast. It's short and not sharp, but I think at least, it sounds good.
Enjoy (I hope).
(http://i238.photobucket.com/albums/ff74/voxonda/th_sva0061-1.jpg) (http://s238.photobucket.com/albums/ff74/voxonda/?action=view¤t=sva0061-1.flv)
Talk to you later.
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Hey Guys,
It's been awhile but there has been a change of plans. Since the Japauto Endurance replica is nearing the status of being finished, I made the decision to sell my beautiful set of Keihin CR 29's in favor of............................... a real Garrett T2 Turbo fed by a new Mikuni HRS 42!!! to install on the sit up and beg bike. Think it will be somewhat of a shock to ride a 850cc Turbo. At this moment I am reading as much as I can about Turbocharging and in the meanwhile preparing some bits and pieces. Hope you'll like it.
Cheers, Rob
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Better start a new thread for that one!