Honda-SOHC
SOHC.co.uk Forums => CB750 => Topic started by: philward on January 10, 2015, 06:17:35 PM
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Hi Guys
Exhaust on and nearly there! Start up hopefully tomorrow - Before and after (if the images upload!)
Phil
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Phil
Looks real nice best of luck for tommorrow
Bitsa
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Looks great don't see many blue ones
Mick
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Wow thats a gud un!!
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Impressive spannering there Phil.
I'm very impressed......hope the 'blast off' goes well and look forward to seeing some more pics of your splendid rebuild soon.
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Nice one Phil ;D What year is it ?
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Hi Trig
Its 1975 UK model - last of the K2's
Phil
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Hi Trig
Its 1975 UK model - last of the K2's
Phil
That is sweet Phil. Everything looks correct for a UK unit, well done mate. What is next ? ;)
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Is that right?All the blue ones I pdi,d were k6s
Candy gold k2,s well that's what I recall :P My k2 was registered 1-12-75 and it was candy gold.
Cheers
Bitsa
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Is that right?All the blue ones I pdi,d were k6s
Candy gold k2,s well that's what I recall :P My k2 was registered 1-12-75 and it was candy gold.
Cheers
Bitsa
You keep saying this but >http://www.classicbikes.co.uk/photo20.html
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Doesn't the red line at 70 make it a Yankee bike?
Mick
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Doesn't the red line at 70 make it a Yankee bike?
Mick
Nope, not on the K2 mick> http://forums.sohc4.net/index.php?topic=143885.0
It is at 8000
Right, got you now. You are on about 70mph. STD on K2 clocks mate.
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Yep meant 70mph mark.
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Sorry, Mick had someone shouting down the phone in non- english.
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Talking to Ralph were we.
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Yep
Mine had the red 70 line.
Just wish I had not switched off bikes in the 80s missed out on so much
Bitsa
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That looks stunning phil great work...
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Talking to Ralph were we.
I don't think Ralph speaks Bulgarian ;D ;D ;D
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Mick
No he wernt mate
Ralph
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Right there Trig but saying that some of my drivers that deliver to me span all off europe
Cheers
Bitsa
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OK, we have established that the K2 had a red line a 70 mph and came in Planet Blue ;D
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Right there Trig but saying that some of my drivers that deliver to me span all off europe
Cheers
Bitsa
Like the Yodel driver I threw a load of abuse at after he chucked my new bike battery over the fence :o
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Still not 100 p/c certain on the colour Trig
Cheers
Bitsa
see if Bryan says different
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Mick
Never had that most were ok but dont matter where you go there is allways 1 mate
In some cases 2
Cheers
Ralph
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I get the same driver every time hes an arrogant git he now bashes on the the door grunts parcel and makes me take it out of the van.
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Polynesian blue metallic.
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I get the same driver every time hes an arrogant git he now bashes on the the door grunts parcel and makes me take it out of the van.
Watch him Mick, he will have you dressed in a Gimp outfit by the end of the month ;D ;D ;D
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;D ;D Brilliant
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Polynesian blue metallic.
What? On a K2. Nope! Stop keep looking at the yank stuff. This is the problem with have now. There are more yank 750 units than english in the UK.
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So what is it then?
Mick
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Polynesian blue metallic.
What? On a K2. Nope! Stop keep looking at the yank stuff. This is the problem with have now. There are more yank 750 units than english in the UK.
I think that colour is absolutly stunning, I would love one of those, such a good looking bike
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Polynesian blue metallic.
What? On a K2. Nope! Stop keep looking at the yank stuff. This is the problem with have now. There are more yank 750 units than english in the UK.
I think that colour is absolutly stunning, I would love one of those, such a good looking bike
What colour nurse ? polynesian blue or Planet blue.
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Planet blue is a k5
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Whatever the colour Phil's is. I just think that would look lovely next to my 400/4, I'm really liking the look of some of the old Honda's. But still looking for a nice Bonnie TI40V as well, oh dear, what's a girl to do when she just can't make up her mind ::) ::) ::)
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Planet blue is a k5
Nope K2 > http://www.yamiya750.com/index.php?main_page=product_info&products_id=2350
K1 was polynesian blue
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What do Yamiya know.Next you will be telling me my bike shouldn't have a nice new set of 341's ;D
Mick
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What do Yamiya know.Next you will be telling me my bike shouldn't have a nice new set of 341's ;D
Mick
Would i do that Mick ? I will try to find the member that has a old picture of his K2 in Planet blue.
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Hi Everyone
Just got in from pub! Thanks for all compliments. UK model had planet blue from my research (actually my least favourite colour but its the original colour for my bike).
Trig - in answer to your question on what's next, I have been building a Freddy Spencer Rep (ish) 900 with 985 Wiseco kit on (another one bought in bit!) - 95 per cent done. Then I've got a TL250 and then got 72K2 frame and a later engine to malke SOHC Café racer - god knows when they'll all be done!
Phil
And I've typed that full of beer!
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Hi Everyone
Just got in from pub! Thanks for all compliments. UK model had planet blue from my research (actually my least favourite colour but its the original colour for my bike).
Trig - in answer to your question on what's next, I have been building a Freddy Spencer Rep (ish) 900 with 985 Wiseco kit on (another one bought in bit!) - 95 per cent done. Then I've got a TL250 and then got 72K2 frame and a later engine to malke SOHC Café racer - god knows when they'll all be done!
Phil
And I've typed that full of beer!
Lucky man. I was going to have a few tonight but, have a little cold to get rid of. Not a bad bit of typing Phil, all in a straight line ;D ;D ;D
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I like the blue it rare like the green ;)
Mick
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Had a perfect day - 750 nearly there (exhausts on without any problems) - an hour out on ZZR - a few scoops - chat with like minded people - match of the day - posh burger (missus is a great cook!) - and now off to bed! Great day!
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If your ride out on the zzr was anything like my ride out today you will be spending all day tomorrow cleaning ::)
Totally worth it though. :)
Mick
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Great stuff phil thats what life is all about glad your making the most of it
pete
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Mick
Got caught on the way back - but its washed, dried, polished and back in garage!
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Like the paint I think white wheels look great but not a fan of cleaning them.
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Still not 100 p/c certain on the colour Trig
Cheers
Bitsa
see if Bryan says different
I had a Planet Blue UK K2 in 74, so it is the correct colour, see attached.
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Cheers Sprinta ;) Could of done with you earlier ;D ;D ;D
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Sprinta did it have the red line at the 70mph mark on the speedo? ;D
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My K2 100% English model... forgive the polished pilot lights housing - now corrected.
The Honda parts diagram (I have) covers all countries, and specifies for the K2 the following colours ....CM, LU, LV, LX, MV..... or Candy Ruby Red, Brier Brown Metallic Custom, Flake Sunrise Orange, Candy Gold Custom & Planet Blue Metallic Custom.
Notably the parts book does not specify the colours being limited to certain countries.... whereas other parts it certainly does.
As a double check I had a look at the Side Panels section .... all the same K2 colours, no stipulated countries.
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Oh well there you go.Who the hell cares anyway as long as its the colour you want? ;) ;)
Bitsa
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Hi Guys
Bike started on the button first turn of the motor! Sounds awesome (a normally much over used word but not in this case). I had forgoten what a 4 into 4 exhaust sounds like.
Rode it down the close and very smooth
However, the bikes ticking over at about 3k (very evenly) even though the tickover screw aren't touching the bar. I have my thoughts on where to start but before I start tinkering I thought I'd consult your collective knowledge.
What's your thoughts on where to start first?
Have statically timed the ignition but not used a strobe on it yet as its ticking over too high. Not yet used vac gauges for same reason.
Havn't run it long enough to get accurate plug colour.
Cheers
Phil
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Throttle opening cable to tight? About 10-15 degrees of play at the twistgrip is a good starting point, and if it has 2 cables, dont forget they both need some play in them. Well done on getting her fired up though:)):))
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Yep - checked them straight away - both got play in them
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If the tick over screw is not any where near the bar adjust each slide by 1/4 of a turn lowering the slide and try again sounds to me bench sync, pardon the wording is too high go from there
Cheers
Bitsa
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Thanks Bitsa - that was my thoughts but you guys have more specific 750 knowledge so good to hear your views. Not doing anymore tonight as had enough excitement for one weekend!
Phil
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Sprinta did it have the red line at the 70mph mark on the speedo? ;D
Hi
Sorry, but I can't remember that detail and I do not have any photos of the clocks.
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I forgot to mention - started without choke - never touched choke lever. Needles need lowering a notch?
Phil
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Dunno start off with the needles in the middle notch but that should not cause high tickover
No choke at all suggests its set mega rich
Cheers
Bitsa
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Ended up tinkering - tick over sorted. How many turns out for pilot screw? Went to check workshop manual but only have original K0 Honda manual (with 4 cable carb info)
Phil
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Are you talking about the air screw Phil ? If so 1+1/8 ;)
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Yep that's the one - if it was 3/4, then that will make it rich I guess? May explain why no choke required?
Phil
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The more the air screw comes out, the more air is mixed ;)
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Got to put guages on (too late now - don't want too wake neighbours kids!) But tick over steady cold without choke - revs fine. Clutch really noisy until I pull in clutch (may be carbs out of balance?) - everything in clutch is new except basket
Phil
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Last message is with 1 1/8 airscrew by the way
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Last message is with 1 1/8 airscrew by the way
These clutches are known to be noisy but, i don't know how noisy your is.
You can go to 1 1/4 on the screw if it is still rich.
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Graham
what's your thoughts on not needing choke?
Phil
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You need to get the carbs set up and it strobed. Maybe the carb slide are too high.
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That's my next job then - any links to carb section of a manual (as I said, only got manual for early 4 cable)
Thanks
Phil
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That's my next job then - any links to carb section of a manual (as I said, only got manual for early 4 cable)
Thanks
Phil
You have got me there because i don't use manual's. I bench synchronize them and once on, then vacuum gauge them up. You will have to search.
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Thanks Graham - its not the mechanics of carbs I need (had them in a thousand bits for zincing/etc) but more the settings info - its 30 years since I set the old 4's up.
Thanks again
Phil
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Hi Phil,
From my manual, this posting in due parts due # of pics. The manual is basic K0, with supplements for K2-K4.
These pics are for the initial (K2) set up... and yup, apologies for the quality but work from an iPad..
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.... and the rest of them...
Hope you can read it all (sorry)
Simon
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Thanks Lobo - much appreciated
Phil
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It don't stop still frackin about after 4 years some days runs 100 percent next week farts and fracs about then real fine and so on.Cant wait to test ride my next one in the garage starts perfect runs great but until you go out and give it some you don't know but I will not be beaten
Best of luck
Bitsa
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Bitsa
I'm a bit away from test riding - just made up it run straight away. When every part has been to bits (particularly carbs for zinc plating), just relieved it started! I'm ahead of schedule anyway as geared up for spring test/MOT but hopefully will be sooner.
Will mess again at weekend
Phil
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Hi again guys
Just having a weigh up of moving the needle position as Trig suggested. I'm familiar with workings of carbs but just looking at in situ carbs and am I right in thinking that I can't remove carb slides without undoing the individual carb bodies from the aluminium carb holding plate (to allow the carb tops past the lifters). Hence taking the whole carb bank off the bike each time I move the needle?
Thanks
Phil
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Yep, unfortunately that is the case:o
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Thanks - airbox 1st or can I squeeze them out first?
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Phil there is no cutting corners on this one. Air box.
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Carbs off - needles set on 3rd notch down - remember putting clips back in that notch now. Think it should be on middle? (thought I'd put it back where it was when I stripped it down when I rebuilt them)
Guess that would make it run rich - will put it up a notch
Whats your view on middle notch - std airbox, repo 341's and 836 kit?
Phil
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Are you saying that you have fitted a bigbore kit Phil ?
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Graham
Yep - a cruzimage 836 kit on standard compression (consulted forum about 14 months ago after research on .net info from hondaman)
Phil
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Graham
Yep - a cruzimage 836 kit on standard compression (consulted forum about 14 months ago after research on .net info from hondaman)
Phil
So, what size jets do you have in the carbs ?
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Can't remember now (12 mths ago when I put them together but can check tomorrow night) - it was DS kit for K2
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Can't remember now (12 mths ago when I put them together but can check tomorrow night) - it was DS kit for K2
This is going to be fun ;)
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Thanks for that!
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Sorry, but you have gone up about 12%. Everything else needs to go up. Standard jet is 100 so, that needs to be 112 minimum. On a 810cc i use 130 jet.
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I'm sure I'll get there with the amount of knowledge on here! Did discuss jetting when I bought kit - I'll dig the thread out tomorrow - thanks Graham
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I'm sure I'll get there with the amount of knowledge on here! Did discuss jetting when I bought kit - I'll dig the thread out tomorrow - thanks Graham
The bigger the main jet, then lower the needle needs to be to stop the fuel. Maybe this is why it started OK without the choke.
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Trig - update on jetting. New mains are 110's and pilots 40 (the ones I got from DS). Put clip on centre notch and will try that and go from there. Have dug old jets out and they where 100's.
Carbs all back together and set up on bench as per manual. Will put them on and let you know how it runs.
Phil
PS - did I see a SOHC member post a thread recently that they are doing a full range of jets. Can't find thread now. Or has DS got genuine items at reasonable prices?
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Trig - update on jetting. New mains are 110's and pilots 40 (the ones I got from DS). Put clip on centre notch and will try that and go from there. Have dug old jets out and they where 100's.
Carbs all back together and set up on bench as per manual. Will put them on and let you know how it runs.
Phil
PS - did I see a SOHC member post a thread recently that they are doing a full range of jets. Can't find thread now. Or has DS got genuine items at reasonable prices?
The manual is based on a standard carb set up. Because you have increased your engine output, now you have to increase your fuel and air input. To be honest i am not even sure a standard air box will work.
Here is a link to the yanks> http://forums.sohc4.net/index.php?topic=31436.msg323965#msg323965
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Looked in some old note books Phil and found that i have used a STD air box but, with a foam filter and the jet at 120. Most of the time i have fitted this bigbore kit to engines that were going into cafe racers, with a gasflow on the head, pods fitted and non-standard exhausts.
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Just started it again and now needs choke and responds ok. I will strobe it and balance carbs before MOTing and road testing it (will wait till weather is better) - I'll get 120's sorted - any recommended sources for jets and your recommended foam filter. Hopefully will be sorted - feel that on std compression, I should be able to set up eventually.
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Just started it again and now needs choke and responds ok. I will strobe it and balance carbs before MOTing and road testing it (will wait till weather is better) - I'll get 120's sorted - any recommended sources for jets and your recommended foam filter. Hopefully will be sorted - feel that on std compression, I should be able to set up eventually.
Don't go too much into it Phil. It will have to be a try and test mate, after you have it strobed and balanced up. I think this is the page you were looking for >http://www.sohc.co.uk/index.php/topic,7698.0.html
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Thanks Graham
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Just spotted this - http://www.ebay.co.uk/itm/191425255660?_trksid=p2060778.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT - what do you think?
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Just spotted this - http://www.ebay.co.uk/itm/191425255660?_trksid=p2060778.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT - what do you think?
It is down as a stock filter. You can make one from a old paper filter.
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already found some foam on ebay - thinking the same. Thanks for all your input Graham, will leave it all until on the road and tinker then starting around your recommendations.
Thanks again
Phil
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I am just waiting for the next thing that you forgot to mention, like the turbo unit and the Nos gas fitted ;D
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Phil. Just looking at some old posts, did you manage to get that beauty up and running properly. Cheers Roy.
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Roy
Yep - running a treat! Have done about 30 miles and is smooth and quiet although only revving to about 4000 so far do to running in engine. I think it feels a bit restricted due to the standard airbox/filter but plan to make more free flowing foam filter (around existing air filter body) - as per Triggers suggestion. Only issue is what I consider are wildly inaccuarate repo tacho/speedo - only put them on until I recon standard gauges. Otherwise, no issues at all - shouldn't be really as most things are new!
Phil