Vm20 on qt50 or towny

William Johnson /

Anyone running a vm20 on these bikes? What’s your jetting ?

Re: Vm20 on qt50 or towny

Yes, but my jetting is irrelevant because I live at 9k feet...

Re: Vm20 on qt50 or towny

Need more information on what's done to the bike. Kitted? Exhaust?

Re: Vm20 on qt50 or towny

Rob LaFreniere /

Co-incidentally, I am just about to install a vm20 on my qt and was about to post the same question.

I am 300 feet above sea level, have a uni pod air filter and a mlm peoples pipe, currently have a stock piston/cylinder but will be installing the 70cc malossi kit.

gracias

Re: Vm20 on qt50 or towny

Rob,

Just a ballpark but should be around a 170-180 main jet with the kit. Id highly recommend a temp gauge to monitor cylinder head temps to dial in tune.

-Hunter

Re: Vm20 on qt50 or towny

Rob LaFreniere /

Thanks Hunter. I do have a temp gauge. How about the pilot jet? Treats indicates that the carb will come with a 22.5.

Re: Vm20 on qt50 or towny

The stock pilot jet is fine at 22.5

Re: Vm20 on qt50 or towny

Rob LaFreniere /

Wundebar! Thanks again.

Re: Vm20 on qt50 or towny

William Johnson /

I'm running a yt60 cylinder and head, boyesen dual stage reeds, mlm edm circuit pipe. vm20 has a 17.5 idle and started with a 180 main currently at a 165. I'm going to jump the idle up but the main is still too rich.

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