what's a bike feel like if its running lean?

stevevtr1 · Post by **stevevtr1** » Mon Aug 13, 2007 9:32 pm

Posted a thread earlier,but its got worse,headgear had a similar problem which he sorted with Hotshot fuel additive, tried that no difference .Checked my carb balance today that was ok swapped plugs,no difference.the problem is once up to temp from 1500 rpm to 2500 rpm at standstill it feels hesitant if wound on slowly if snapped open iy misses & backfires .On the road at those revs it just misses til 3000 then its ok.
Had a K & N ,dynojet & set up done by Roger about 5K ago & it was spot on 'til aweek ago ,can a motor start to go off or should i be looking elsewhere ?
Cheers (getting desparate !!) Steve

Zer0Zer0 · Post by **Zer0Zer0** » Mon Aug 13, 2007 10:37 pm

Water in the fuel maybe?? what with all the rain and all.. check the fuel filter and airbox for any obstructions. other than that m8 i'm stumped

sticking carb slide./s ..stretched throttle cable??

alan · Post by **alan** » Mon Aug 13, 2007 10:52 pm

VTRBob has had similar problems he messed about with throttle sensor and put a new front coil in and had no other probs since.

Pete.L · Post by **Pete.L** » Tue Aug 14, 2007 7:48 am

Slow Idle jet could be blocked
try some carb cleaner

Pete.l

stevevtr1 · Post by **stevevtr1** » Tue Aug 14, 2007 2:15 pm

Thanks for the replies,did a bit with the fuel side of things ,checked carb balance,stuck a bottle of hot shot fuel system cleaner in the tank took it for a thrash but its still missing & back firing.Think its the front thats missing so i'll look at swapping the coil (something with it backfiring as it picks up after missing is pointing me down the electrical route?).Let you know how it goes.
Cheers Steve

Post by **sirch345** » Tue Aug 14, 2007 8:44 pm

If you've narrowed it down to the front cylinder Steve, check the HT lead where it goes into the sparkplug cap. I think it was Stratman who found that connection to be giving a problem with a misfire. All he did was cut the bad bit of HT wire back a bit and re-fit it!

If it isn't that, may be the spark plug cap itself needs replacing

Chris.

stevevtr1 · Post by **stevevtr1** » Tue Aug 14, 2007 10:04 pm

Thanks Chris,i'll look at that first while dave Silver gets back to me with a price for a coil.

BarryH · Post by **BarryH** » Thu Aug 16, 2007 9:28 am

Also stick in a new set of plugs. I had "issues" with mine. A new set of plugs is cheap and you know you've eliminated one area. It does sound more ignition related than fuel from what you say.