Suggestion on jet size? I have a full

[rinaldi]

AC Racing exhaust with a Uni and Outerwears along with an open box style K&N lid. I have it jetted at 42/158. It pops a bit on decel and wondered what jet to go to next, 162, 165, 170? When I jetted it I never did turn out the fuel screw which I will do this time around. It runs very strong, but I would think with the slight pop on decel I am still not where I need to be.

[BEAVER.989]

A slight pop on decel is normal. By the time you get rid of it you will be running rich. Have you checked the plug? Your jet numbers sound about right.

[dariusld]

Slight pop on decel is also a sign of an exhaust leak. Rule that out first.

[RIDEREDson]

try going down to a 40 pilot.

[05trx300ex]

Originally posted by RIDEREDson
try going down to a 40 pilot.

I would do the opposite and go to a bigger pilot.

[Snipe]

pilot wont effact popping while moving or in a decalration.

[aDviSol2y]

Keep your pilot at 42. You can try messing with your air fuel mixture but I would keep it at 2 1/4 turns out. A little popping is ok. Mine pops a little, it always has. I've tried getting rid of it, but have had no luck getting rid of it all together.

[dariusld]

Originally posted by aDviSol2y
Mine pops a little, it always has.

Mine doesn't pop and never has:p

[aDviSol2y]

Originally posted by dariusld
Mine doesn't pop and never has:p

That might have something to do with running a 450 carb. But im no expert.

[05trx300ex]

Originally posted by Snipe
pilot wont effact popping while moving or in a decalration.

Yes it does, check this out from jetsrus.com

"When purchasing main jets don't forget a few larger pilot (slow) jets. Pilot (slow) jets will reduce or eliminate backfiring when letting off the throttle and will help improve cold weather starts."

[aDviSol2y]

Has anyone here ever gone over a 42 pilot?