Mountain Mod 700
New member
I have a 2000 MTN Max, ported and polished engine with power inc end dump pipes and air box mod. I know these pipes run at 8500 rpms. I need an idea for jetting at 8-10k feet. I tried 138.3 PTO and 140's but won't pull the rpms, I tried nocking weight out of the primary but didn't change the rpms. Need some advice.
what do the plugs look like at rpm?
Mountain Mod 700
New member
The plugs are dark brown.
A couple of bucks
VIP Member
a touch ritch but not too bad. reeds are in good shape? air box all stock?
Mountain Mod 700
New member
I have the air box mod, holes in the mid plate. And the reeds are good.
primary spring might be too stiff for your clutching. i am by no means a clutching expert but it might be asking for a softer spring. are you using power inc clutching reccomendadions as a base without the porting?