Pwk 28 mm jetting

[Slydog]

Hi I’m new to the thread . And have a few questions thought maybe a few you fellas could chime in and help me out .. I purchased a pwk 28 mm from Vito blaster parts anyways. I have a fully rebuilt motor and boysen Reed stock bore fmf fatty pipe and fmf Silencer .I can get it to run nice with a 112 main and a 32 pilot with air screw half turn out but that seems lean to me .shouldn’t the air screw be at least 1.5 turns out if I do this it won’t idle .. and bogs Help please.. I know the motors sound it’s was just rebuilt .. HELP

The further you turn the air screw in the richer it makes it. 1/2 will be ok. It will still give you some adjustment for temp changes.
Or buy next size up pilot jet.

 

[TravisC1989]

The further you turn the air screw in the richer it makes it. 1/2 will be ok. It will still give you some adjustment for temp changes.
Or buy next size up pilot jet.

The further you turn the air screw in the richer it makes it. 1/2 will be ok. It will still give you some adjustment for temp changes.
Or buy next size up pilot jet.

well dose a 112 sound lean on the main dose not seem to run hot or anything

 

[TravisC1989]

I’m around 2700 feet stock bore fmf fatty with fmf silencer carb is a 28 pwk

 

[Slydog]

I’m around 2700 feet stock bore fmf fatty with fmf silencer carb is a 28 pwk

Read up on plug chops. I would definitely check it. I run a kehin pj34. With a 162 main. At sea level. But that is with a ported stroked big bore. Last thing you want is to run too lean.

 

[TravisC1989]

Would you think a 112 main would be to lean at 2700 feet like I said I have boysen reeds fmf fatty and fmf silencer aftermarket filter I just don’t really know lol I can plug chip tomorrow after work I just down understand why the air screw is at its prime at a half turn out intried a lager pilot it didn’t seem to help and im positive it has no air leaks

 

[Slydog]

Would you think a 112 main would be to lean at 2700 feet like I said I have boysen reeds fmf fatty and fmf silencer aftermarket filter I just don’t really know lol I can plug chip tomorrow after work I just down understand why the air screw is at its prime at a half turn out intried a lager pilot it didn’t seem to help and im positive it has no air leaks

Your plug will give you your answer. Buy a 4pack or more of plugs. You can do half throttle plug chops also. Which is where most riding is done.
Main jet. Comes into play at3/4 to full throttle. The pipe and air filter will have and affect on jetting. Reeds normally don't affect jetting.