Oct 8, 2006
8
0
I have an 83' YZ 490 that I race on a Go Kart. We run on an 1/8 mile and a 1/4 mile clay oval track. I have two different cylinders that I can change when we are running at one or the other track.
The question that I have is, to get more torque on the bottom, do both Transfer and exhaust ports need to be lower or just lower the exhaust port? I have .020 before the piston is flush with the top of the cylinder. If I machined the .020 off of the bottom of the cylinder, what would I need to do to which ports working towards getting more off the corner?

I would appreciate any info that will help me get off the corners better.
 
Oct 8, 2006
8
0
Thanks for the info,
I cut the .020 off the base of the cylinder, with the exhaust port
opening @ 88 deg after TDC and a squish band clearence of .053 the combination of the two should help. Also switching from 100 oct to 114 fuel.
Thanks again,
Joe
 

Welcome to DRN

No trolls, no cliques, no spam & newb friendly. Do it.

FRESH VIDEO

Top Bottom