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Mikuni TM28 jetting suggestions please

Posted: Sun Sep 09, 2018 9:08 pm
by Pompeydave
Hi all, I’ve got an Italian GP125 with GP200 gearing, a Casa 185 kit that has been bored out to 198, a BGM electronic ignition timed at 20 BTDC, a BGM big bore exhaust and a Mikuni TM28 carb. The carb is the new item. Can anyone suggest jetting, a needle and an atomiser please?

Re: Mikuni TM28 jetting suggestions please

Posted: Sun Sep 09, 2018 9:12 pm
by Pompeydave
By the way the cylinder set up is with the squish set at 1.5mm and the piston sits at 1mm above the bottom of the exhaust port at BDC.

Re: Mikuni TM28 jetting suggestions please

Posted: Mon Sep 10, 2018 3:04 pm
by vegansydney
On a ‘Suzuki 190’ with K&N airfilter running via a dl/GP150/200 hose:

Main 190
Pilot 40
Needle 5D5 on 2nd clip
Atomizer 169-P0