[VJ_M]

Ok, I have a Dr200 and want to put a 140 main in the carb, However, I don't know a thing about jetting.

there is a #125 on one jet and a #115 on an other jet....

Now, my question is::::

Is the main jet the one where the throdle needle goes..??????? the 115# is on that one....

Or is it the long one next to it..?
the #125..???

the carb name is Mukuni 42A ...
and under neath the 42A is the # 20

 

[malachi]

Hey it's me again. It looks like you are going to try a 140 main. Ok, I now know that your carb it different than mine. It sounds like your carb is bigger seeing as mine is a 31mm. Anyways, I'll tell you where my main jet is on my carb and hopefully it's in the same spot on yours. It should be but if not I'm sorry ON MY CARB if you take the float bowl off, the main jet is smack dab in the center on top of a white sort of tube. Unscrew it and put in a 140 and reassemble. I hope this helps :wink: