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Hallo, thaks for yours answers. It helped a lot. Know anyone basic Mikuni TMX 30 jetting for RD 350 ypvs ? Mikoni-toham sell it with this setting Main jet 195 Pilot jet 40 Needle jet N-9 ( 622 ) Jet needle 5EL68-3 Starter jet fixed Main air jet 0,8 - fest Power Jet 80 Throttle valve 4,0 Needle valve...

Hallo, can you please help me with getting some tuning parts? In the past i buyed some part from Marco Boehmer, but now i can not get contact on him. I am looking for this parts from Marcos web - 30mm Flachschieber-Vergaser 2 Vergaser mit Grundbedüsung, Seilzugchoke-Einheit, Ölanschlüsse - Boyesen-M...

I am also interested in this O-ring update.

Who make it in germany? I can send my old heads in germany.

Now I try MJ 270 it seem to be the best around 4500 - 6000 is much more power. Lower rpms with minimum gas is prety smooth.

But it seems the mixture from 8000+ is too lean and the motor subjektiv loos some power.

It seem that i should use MJ 290 and i send Jet needle one pin down.

MK - nice try )=>> Vulnerability was found. It was on left pilot jet carb. Some mess was on the surface of contact. The gas was leaking around the jet, then mixture was too rich. Now i have best feeling from MJ 300. (carb with no power jet) Jet needle is at the second position from down. Fourth posi...

I have original mikuni jets, flow measure. (price for one was 3,2E)
Is there any cheaper version ?

Holliheitzer,
Pilot Jet is 22,7 and they both are properly installed )=>>

I try one more time blow whole carburetor with air from compressor (5 Bar).
It seams it must leaking fuel out of Jets anywhere.

But question is where it can be?

Hi i need help with jetting of mi 31K RDs. 31K cylinders bored at 66,25mm, carbon reed flanges on original reed houses, 31W carburetors (no power jet), air filter from Macro Boemer. I try MJ 300 it was unbelievable rich it four stroking also at the half of the gas. Then I try MJ 240 it is still too ...