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lol, yeah will make my way to that thread some time soon. And yes, i do have an aftermarket exhaust, well its pretty much a straight though. So bigger jets are on the shopping list. Not much else i can think off to solve issue.

Hey, i'm back again. You guys will be sick to death of me. The non-runner is once again a runner, i'm too embarrassed to reveal cause but needless to say it was entirely my fault. Here's where i'm at now. Got motor running, had a run to properly heat engine and returned to re-balance and fine...

Hi xschris and thanks for reply, i can confirm that slides are positioned correctly and vacuum is consistent on both carbs. I have, since, managed to get motor running. In fact i got it running so well i managed to tune and balance carbs and it was running sweet as a nut :) Had a quick run and...

:banghead: Oh well, new rubber fitted and bike would not start at all. Gave up late last night exasperated. Went out this morning gave it a go and it fired first time on left cylinder and ran briefly but no throttle response whatsoever, just a stuttery idle. Carbs pulled again, everything...

Well, what a deliriously happy little chappie i am :) Ordered new diaphragms from www.jbmindustries.com on Monday (13th) @ 5.30pm and just home after a saturday dayshift(18th) to find a little parcel with 2 lovely bits of rubber waiting for me. What a service! From USA to UK in 5 days, ive...

Thanks XSchris, part ordered and will update when it arrives

Sorry :) Just one more question (for now) :) I know i have found the,or A, fault. But... The faulty diaphragm is on the right carb but the misfire/backfire was through the left carb. Any thoughts??

Well turns out the diaphragm does have a pinhole, dont know how i missed it (5or6 times) Tried a repair with plasti-dip and completely ruined it :( Now for the wait for a new one to come from USA I thank you all for the help and will update when i get it back together ( and hopefully running right)

Lol, yeah true. I have access to an ultrasonic cleaner and it has been used.Just dont tell my boss :)

Thanks :) I have come across them, through this site, and will look into shipping costs etc if it comes to that. I sure dont want to pay uk prices if i can avoid it, they are so much elevated compared to the states:yikes:

I am back on rota at work, but pulling carbs will probably be happening again soon so will post pics asap. I cant provide any jet sizes as the rest are illegible or not removable without force :eek: Needle setting will be fothcoming with next carb pull

This is something i am unsure about and will have to look into. Engine has been completely stripped and overhauled but cant recall coming across such a thing. Saying that it has been a long time in the process so will have to get back to you on that :confused:

Actually, that is one thing i tried over the weekend out of interest. Screwed idle control right out while idle was flying away but made no difference whatsoever. The only way to get idle down was by forcing it. I could keep it running then with a little blip of throttle but as soon as i went...

Oh yeah, and stock air filters (brand new)

Should maybe add, exhaust is 2 into 1 with 'megaphone' style end can, which probably is pretty much straight through. Main jet is 142.5 and air jet 170 according to my kids eyes :)

New mixture screws have been fitted as part of the repair kit and holes are very clear :) Adjustment does affect running a little (not as much as i'd expect)but not high revs Ive got an old pair of BS32's kicking about is there any chance diaphrams/slides are interchangable (long shot) ? Also...

Ok, firstly thanks for all replies. So here's where i'm at.... -Carbs pulled and cleaned to within an inch of their life :) -Re-fitted and balanced with manometer -Intake system spray tested for leaks..all good! -Valve clearances re-checked (ok) -Throttle cable checked for free movement (ok)...

Ok thanks for that. So if i were to go for a size, or two, up what should i look for? My mechanical knowledge is more toward fuel injected cars :(

Just a quick question... Pulled carbs again (second time this weekend) and thought to pay a bit more attention. got main jet out and looked at numbers stamped on it ( or rather, the kid did, way too small for my eyes). the number on it is 271 then under it X-6. Having trawled this site, these...

thanks again for the replies. I am 100% confident air tightness and have 'spray tested' Working nights for next couple of days but will pull carbs at weekend, investigate and post results. As for drivability, it is possible but not very pleasant so will need to be sorted out. this is all...