Project speed...

[1fast450R]

Ok, I have the hrc kit, HMF BIll Balance Full system exhaust, K&N air filter with out a lid, 13t sprocket. I am wanting a high compression piston, favorably a weisco, what is best to go with, a 12:1, or 13:1? Where is the best place to get Vp U4 race gas, I herd it was the best to run. Also I am going to need a cdi/rev box, which would you recomend?

[Mobile Dyno]

I would go with the 13.1 compression pistion for the Hp. I would recommend a Vortex cdi. I have dynoed 450's with the vortex. They all have reved out to 11.5k. A cdi will not create Hp it just revs out longer. We have see 10mph on the dyno. :D

[1fast450R]

I was leaning toward the vortex, all the others are just to ify...
i have herd good things about dynateks new one also...

[ZRider400]

if you dont mind buying race gas....then go with 13:1....


IT will haul ***:devil:

[1fast450R]

Originally posted by ZRider400
if you dont mind buying race gas....then go with 13:1....


IT will haul ***:devil:

i dont mind

[trost66]

You should look into getting the JE 13-8-1 from sparks it will be alot better than the 13 to1

[1fast450R]

13:8:1 is out of the question. It uses only one ring, it is very unreliable, and will not last long. It does give more power tho...