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Posted

i am thinking of taking my stock head (milled .035) off and put a head on that has 19cc domes, how much will my jetting change? pilot?,main and needle?

Posted

Jetting shouldn't change...maybe a main size at most.

 

You may, however, need to run either a mixture of pump/race gas or straight race gas.

 

You'll need to get a compression reading to tell if you do or not.

 

Normally...145 or more, a slight mixture of race/pump is a good idea...

 

Generally, over 165PSI and you need race gas....

Posted

i am thinking of taking my stock head (milled .035) off and put a head on that has 19cc domes, how much will my jetting change? pilot?,main and needle?

 

 

what is your elevation?

Posted

i think around 500ft above sea level

 

hey butch what ya doin ?you gonna run semi pro classes again?jetting should b about the same but if it were me i'de bump the jets up a size or 2 and go from there.you might think about a bit bigger carbs also with the coolhead and domes.i'll see ya at nationals at bbdr hopefully.not sure about thunder valley though.

Posted

jetting shouldnt change with a two stroke head. if it does youve got some funky shit going on. think about it. youre not flowing any more air, just compressing what you had already.

Posted

hey butch what ya doin ?you gonna run semi pro classes again?jetting should b about the same but if it were me i'de bump the jets up a size or 2 and go from there.you might think about a bit bigger carbs also with the coolhead and domes.i'll see ya at nationals at bbdr hopefully.not sure about thunder valley though.

i'm thinking about it for maybe the end of this season or the first of next having to much fun winning in the class i'm in now, lol!

Posted

Hey butch,maybe we can work something out and I can let you ride one of my bikes.I'll talk to you more about it at the races.

thats totally up to you but im all for it

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