E-start & High Comp Piston?
Posted June 08, 2007 - 11:29 AM
Posted June 10, 2007 - 02:09 AM
I got a JE high comp piston in my '05, it is 12.7:1 in the WR.
The '05 WR is 12.3:1 stock and '05 YZ 12.5:1 stock.
I have to first say that I got hotcams as well that I installed at the same time, and the e-start is not strong enough to turn the motor over quick enough to start it. It turns over really slow.
I don't know if it is the cams, but the decomp pin is the same length as stock, so I think it is the piston.
For the gains of the extra .5 CR, I would just stick to stock piston and keep the e-start.
Mine kickstarts easily every time though.......
Thinking about changing pistons? I did mine at about 5,000kms (3100 miles) and the stock piston and rings were in really good shape.
Posted June 14, 2007 - 12:20 AM
Seems like it is the cams that is the problem and not the piston.
When I get my issue resolved (not in the near future...) I will let you know how I get on.