I have a 85 250R ATC it has the stock cyl on its 3rd bore completly ported.
It has a 38mm Mikuni and a K@N with Vforce reeds and a Answer roost boost that I disconnect when racing.
The trike has out ran every stock 4stroke that I have raced and alot of Banshees but there is always a few at the dunes that are running some major HP that can beat me in 300ft.
I was wondering if a Coolhead is worth the money.
Or if I just need to invest in a 310kit or bigger to beat those highly modified Banshees.
Any ideas?

 

ok want the most powerpossible get a 11mm stroker crank and a psi powervalved cylender in the 425 piston configuration and tear it up . that sjust my oppinion that swhat i had on my 86 r and i wa suntouchable btu it would have had alot more power if i would have had a decent exaust i had a shi tty dg systemand a old cr500carb on it and it hauled a$$

 

ive heard good things about ported 330's and 370's by ESR. that backed with a nice swing arm, paddles, suspension and a rider with the ***** to lay on the throttle even when the front end wants to kiss your helmet, you should have a good platform.


310 would run good but i doubt would run with "highly" modified shees.

 

Before you go spending the big bucks,
you should try different size sprockets,
it would be way cheaper. Along with bigger back tires


-------------

86 350x
.040 dome-top piston
Cobra Jet Exhaust
K&N Filter
Sprockets
White Brothers Cam and Bigger Carb

Wanna Race