lean on pilot jet...bad?

[f150mann]

hey guys.. i ordered a 42 pilot jet because im pretty sure that im running lean on that, but fine on my main, is it ok to run like that for a few days???

[casey_lamm]

what makes you think you are lean on the pilot jet? what is in it currently? Stock?

Unless you are really really lean I doubt you will hurt it...but If it were my bike, I wouldn't chance it.

Again it would depend on the symptoms and how severe.


Originally posted by f150mann
hey guys.. i ordered a 42 pilot jet because im pretty sure that im running lean on that, but fine on my main, is it ok to run like that for a few days???

[f150mann]

it backfires on decel, and turning the fuel screw doesnt do enough for it. and its a stock pilot, with a pipe and air filter.

[casey_lamm]

full exhaust or slip on?

how significant is the popping on decel...some is normal with a aftermarket exhaust....

Can you take a video or anythnig?
Originally posted by f150mann
it backfires on decel, and turning the fuel screw doesnt do enough for it. and its a stock pilot, with a pipe and air filter.

[f150mann]

its quite bad popping really, definetly doesnt sound normal to me. i can maybe take a video tomorrow.

i just got a slip on and uni filter, and a 155 main jet. works great other than the backfire on decel. all videos ive seen on here of hmf pipes dont backfire, but mine does quite loud

[casey_lamm]

i went to a 140 pilot... and didn't have any trouble...


142 would have been even better, but couldn't get one when I had time to do it.



Originally posted by f150mann
its quite bad popping really, definetly doesnt sound normal to me. i can maybe take a video tomorrow.

i just got a slip on and uni filter, and a 155 main jet. works great other than the backfire on decel. all videos ive seen on here of hmf pipes dont backfire, but mine does quite loud

[f150mann]

140? you mean 40 right

[casey_lamm]

yes, sorry.


Originally posted by f150mann
140? you mean 40 right

[hornetgod13]

40K pilot jet should be fine for your set up.