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Messages - Waggles
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286
« on: June 21, 2011, 08:54:42 AM »
HI there,
Thanks for this. My F1 stood for over 25 years and the residue has gone beyond that lovely gunge you had! The residue is now hard, rock hard! some of it you can crumble away so float bowls etc are OK but the jets I just cant clear, soft wire won't touch it and I know enough not to use anything more vicious than that. Have sourced new jets now from Mr Silver so I guess I will chuck the old ones in some petrol / diesel for a few months and see what happens.
All the jets are screw fitting EXCEPT the needle jet I have found, the new ones are just plain bush type. You have discovered the same as me that you can't compare needle jet part numbers so I guess I will have to replace them to be sure I have the jetting correct as I have no idea what model of 750 the carbs I plan to use are from and I don't see any easy way to compare them ( at least while the old ones are still fitted to the carbs ) There is a step in the side of the needle jet so by careful examination I should be able to see which way to push them out, wish me luck!
287
« on: June 17, 2011, 04:40:17 PM »
Well I guess its normal for things to seize up when unused yes. My bet would be its the cables. Try disconnecting them from the carbs and see if throttle is still stiff. They will no doubt need a good oiling all the way through. If you don't have a cable oiler remove them and hang them up in garage and make a little plasticine cup around the top and fill it with oil. Leave it overnight and you should see oil dripping from the bottom.
If its not the cables it could be sticking pistons in the carbs or the twistgrip / friction adjuster but these are less likely
288
« on: June 17, 2011, 04:27:24 PM »
Hi,
My F1 restoration is proceeding well and I have reached the carbs. The originals that came with the bike are horribly bunged up with a hard residue I can't budge any ideas what might soften it up?
Next I have obtained some other 750 carbs ( presumably not F1 ) which are much cleaner so I plan to re jet those suitably. As a matter of interest does anyone know if the actual needle JET ( not the needle ) is different on the F1 compared to others? tried to compare part numbers but other models seem to list needle and jet separately but the F1 shows needle and jet together as a kit so part numbers are bound to differ. Finally, before I bugger something up do the needle jets just push / tap out? if so is it downwards towards the float bowl? Haynes manual tells you to replace them regularly but not how to!
cheers
Andie
289
« on: December 18, 2010, 11:23:28 AM »
Obviously the miles you can get out of a 750 motor depends on an awful lot, and I suspect most are trashed or even rebuilt before the max has been reached but was having a chat the other day on this topic and know of a CB5004 with 80,000 miles so far on original unrebuilt motor, just a little survey for interest, what the highest miles anyone out there has got ( or got so far ) from an unrebuilt 750?
290
« on: October 25, 2010, 09:33:33 AM »
An update on this just in case it helps someone else.
I struggled and struggled and got nowhere. I had read that the circlip tends to sit back in the groove partially obscuring the holes, this seemed to be my problem but I couldn't get pliers intothe holes. Now the observant among you will see a clue above, I didn't see a wire circlip, the rubber boot just fell apart and guess what? the wire circlip was still down there, all rusty an masquerading as part of the cylinder! ( No my eyes are not that good either ) once I had levered that out the troublesome cirlip came out easily!
291
« on: September 30, 2010, 07:28:04 AM »
OK thanks guys, will give it a bash at the weekend
292
« on: September 29, 2010, 07:35:21 AM »
Thanks guys,
Yes, that makes sense K2.
My piston is perfectly free, I am only stripping to ensure all is OK and coz I don't trust 34 year old brake seals! I have the rubber boot off OK ( didn't see a wire circlip on that incidentally? ) and have cleaned the crud away so circlip is visible. My problem is no normal circlip pliers will reach. I have a set with replaceable tips, I could make some 'long reach tips' for that pair, or I bought a 90 degree long reach pair made for master cylinders but these have quite thick arms that mean they both catch on the piston end and make it impossible to see if you have engaged or not. I could grind the arms down a bit on these as an alternative. Or maybe just make a tool from an old screwdriver to engage a single hole and lever it ( I have a replacement obviously and refitting will be a breeze comparitively ) What did you lever yours out with Bryan?
293
« on: September 28, 2010, 07:18:56 AM »
Oh dear!
OK sacrifice virgin, pour libation of Brown ale and out with the angle grinder then.
294
« on: September 26, 2010, 10:19:10 AM »
Hi all,
F1 rebuild progressing slowly, at least some bits are going back together now. thanks to this forum.
Am now at the point of stripping the brake master cylinder and need circlip pliers that are suitable. Brough a pair specially made for master cylinder use but they dont fit, before I take and angle grinder to them has anyone found a suitable pair on the net anywhere? or is the special tool available?
295
« on: August 26, 2010, 07:30:41 AM »
Good plan guys, I'll do that. Am almost tempted to put some Castrol R in the first tank of fuel too ( if you can still get it ) LOVE that smell!!! 
296
« on: August 24, 2010, 07:54:08 AM »
Yes, its coming along slowly, as I say about 1 - 2 hours a day is the most I can manage. Am currently rebuilding forks and working on steering head area. I thought removing all the headlight gubbins wouldn't take too long then noticed the wiring loom ties everything together! * sigh *
Haven't gone near the Allen bolts yet ( except to check and sure enough none of my allen keys fit properly so am off to get a decent set )
Am not planning to strip motor at this stage as it is so low mileage, appreciate there is a risk of stuck piston rings so I could be caught out but thought it was worth it to try. The compression feels good on all cylinders so I am hopeful but I know its the oil rings that tend to stick.
I am trying for a 'very tidy' look as she will be ridden a lot ( including commuting except in real depths of winter ) can barely get in garage to work on her now as I have so much stuff to put on her! will be glad when I actually start to put things back together! Am actually getting quite excited at the prospect of my first ride for 30 years!
297
« on: August 13, 2010, 07:42:08 AM »
Thats a good tip K2, thanks, will bear it in mind. Have to be honest and say you are dead right in that I just never expected the speedo drive cable screw to be stuck so am probably guilty as charged being a half-arsed attempt ( admittedly with the impact driver ) but I am slowly learning that on a 34 year old barn find EVERYTHING is stuck!
Luckily ( I think/hope ) all the engine case screws have been replaced at some time with allen headed bolts, I well remember how hard they were to get out and always assumed the factory employed a Sumo wrestler specifically for the job of doing them up just that little bit too tight!
Was aware that things like the brake bleed nipple would be 'challenging' so took them very seriously and managed to ease them out with heat etc. Any other classic things likely to challenge me?
298
« on: August 12, 2010, 07:30:16 AM »
Its off!
Thanks Bryan but I am severely limited space wise and don't have a vice set up! Oh for a proper workshop.
I managed to remove it by the method I outlined above, I got a decent ring spanner, put it on the nut then refitted the wheel but only tightening the clamp on the other side to the nut. Weight of the bike prevented any twisting. Couple of decent welts with the persuasion tool and it was loose.
clean up the hubs then the wheels are off to be rebuilt at the weekend.
299
« on: August 11, 2010, 08:02:24 AM »
Firstly a quick update on my F1 rebuild. Don't get a lot of time at the moment and am still at the strip down stage. For this year I am hoping the motor will be OK as it is low mileage ( 5900 ) and will be replacing the brake hoses / seals etc. Will be prettying her up and have sent a lot of bits off to the chromers. At the moment I am still on the front end, will be removing and re sealing the forks and replacing head bearing with tapered roller. Am encountering the usual stuck items ( other posts show the snapped exhaust stud and broken carb float pivot support ) and all screws seem to be welded in ( yes I do have an impact driver ) latest casualty is the screw holding the speedo cable in the gearbox which will need to be drilled etc I guess.
Latest problem is the front wheel spindle nut which has so far resisted my attempts to remove. If the wheel is out then anything of the diameter to go through the hole in the offside just bends or breaks. Next plan is to get a proper ring spanner so I can use a decent 'persuasion tool No 1' on it while the wheels is back on the bike but only held on the offside. If all else fails I guess I will have to source another one and cut this one off so I can get the wheels off to be rebuilt. Anyone else had this problem? if so any tips?
Cheers for now, will try and post some pics over the weekend
300
« on: August 06, 2010, 11:53:59 AM »
I had one for a while, bought it as new old stock around 1980 I think. When run in it was still smoking so I had to replace the piston rings, was OK after that. In the eye of this beholder I thought / still think its a cool looking bike and a bit different, hated that chrome exhaust balance monstrosity tho. It was economical ( and yes it vibrated more than a 4, but at lowish revs it was more a shudder than vibration ) and I found it rather jerky and a bit harsh at low filtering speeds ( think this might have been due to the primary drive being all cogs and no shock absorbing chain if memory serves? ) so it could be very tiring in heavy traffic. I found the performance a bit disapointing to be honest, it cruised easily and seemed to have a fair bit of grunt but if you really wanted to move you had to rev its nuts off, more so than a 4.
No idea of long term problems as the usual SMIDSY right hand turning capri wrote it off convincingly after about a year.
Overall a 4 beats it in all categories but if you consider it as a slightly modernised 450 its still an interesting bike. Heaven knows what spares are like now tho.
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