Idle bogg then rev thur bog then slow return to idle

[thomas h.]

So just got the motor back from dune port. And I'm trying to sync carbs and figure out the issue. The idle is ok then I rev it it is slower to rev and I let off and it is slow to return.

4 mill fresh plugs and 25 pilot mid clip stock needle and 340 mains thanks bhq

[thomas h.]

Also I have a sync tool and the idle air speed is 7 hg both sides.

[sheerider11]

I'm pretty sure that is way to lean. Talk to your builder, they'll know best.

[Big Bucks]

try a 30 piolt, im guessing there stock carbs, and 1.5 turns out on the air screw

[thomas h.]

Yup got a air leak and I just tryed the 30 p and to bring down the idle the mix screws where closed and the idle was still higher but improved so I think my intake gaskets are bad.

[wacko2000]

Your still lean with a 25 pilot

But for starters do a leak down and fix that problem first!

27.5-30 pilot for sure

Ask Kevin what he recommends from experience he is usually pretty dam close with his jetting recommendations

Joe