172 Idle jet

[wack 63]

Setting up a Malossi T5 172 with a standard 24 carb and Revolver pipe and the standard idle jet needs the airscrew well out to idle correctly,anyone recommend a different jet size?

[soulboy]

wack that's my set up pal and ive got a cut crank and matched and polished casings and I have no trouble you sure its that mate

[ukpeckerwood]

Sounds like the idle jet is to large, thats why the air screw is out so far, but you say its the original idle jet.

[wack 63]

Pretty sure airscrew out richens the mixture. The idle seems fine even with the screw 4-6 turns out but have a rich spot at 1/4 throttle with a BE3 which clears with a BE4 but the plug is dark grey with the 4 at 1/2 throttle plug chops.