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Choke doesn't lift revs much, sounds normal from what you've described. Plug or coil or plug cap seems the likely cause. Can you work out which cylinder it is that misfires? Oh, and occasional misfire on tickover is normal, it may even cut the engine when cold if you don't warm it up a bit before p...

Unfortunate I’m still having some running problems, although it is running a lot better than it was when I bought her! My problems now are; Choke doesn’t seem to increase revs much. I’ve set the idle to 1200rmp when hot, when it’s cold it runs at 1500 with choke but will stall if the choke isn’t on ...

From our late friend Benny Hedges, he says the part number for 48 is 99103-4370480 Taken from this link: https://www.vtr1000.org/phpBB3/viewtopic.php?p=142524&sid=a4b83ce00cfb64f343a1b569880ff761#p142524 47.5 here: https://nrp-carbs.co.uk/shop/index.php?route=product/product&path=46&pro...

Thanks for the reply chris. Yeah so the new boots look like oem repo’s with all the locating nibs and stuff. I thought the air or lid sucked air from the nose of the bike but on closer inspection the big rubber scoop on the lid looks as if it doesn’t take it from anywhere in particular so that’s why...

Hey all, I need get some bigger pilot jets, does anyone have links to where I can get some 48’s or 47.5’s? I’m not sure of what make you get or if there are specific types for this bike (02 mode)

Thank you

I decided to do a vacuum test with lighter fluid gas, then I had a thought, I’d it possible that it’s just evaporating and being sucked into the air intake? So I did the test with wd-40. Drenched the front carb boot in it and no change to idle speed?!

I’m pretty sure the rtv silicone Ive got is fuel resistant. Plus it’s not like fuel will be coming out considering the vacuum is drawing air in through the leak

Is there anywhere on the actual carb near to where the boot sits that could leak?

tony.mon wrote:Has the front vacuum take off been fitted?
That might be where the leak occurs.

Yes I put a brass nipple and pipe (and a little thread lock) in it for balancing, but I sprayed that and it not that :/

Yep I made sure to take the time to seat the boots well, and I am sure the carbs went in all the way. They popped in and I had a lot of my weight pushing down to ensure they where seated correctly. I think I’ll take them all back off, give the surfaces another clean and try again. I am using the ori...

Well it seems like some of my problems are back [emoji24] idling has become erratic again and coughing and missing but only at bang on 2.5k revs. Squirted carb clear to test the new boots again and the front boot has developed a leak [emoji24] I’ve done 100 miles on the new carb boots and made sure ...

tony.mon wrote:I'd be tempted to try a different pilot jet size and retry, for that cylinder, to see if you can get it under three turns out.

Maybe next time I have them off I will but it’s running okay for now I don’t want to mess with it haha

sirch345 wrote:I found that stretched cam cover bolt today I mentioned above. You can clearly see the threads that are stretched right next to the collar

IMG_6009M2.jpg

Chris.

Oh damn that’s some serious stretch! That ones lucky not to have snapped

just a we note. you have the front pilot screw and rear the wrong way round. . my old crusty memory says you want the rear one slightly richer then the front, no big deal running wise but the rear runs a tad hotter. Thanks Fabio! I didn’t even notice haha, I reseated the screws and they are now Fro...

Thought I’d take a punt and ordered one! I will update with photos and info