How did you get the 13:1 compression piston already. I have been looking for one but they say they will not be out for awhile. Do you know where I can get my hands on one.

 

umm thats the stock compression buddy...

 

ummmm..... NO IT ISNT. The stock compression of a 2004 yamaha YFZ450 is 11:9. The stock compression of a yz is 12:5. And the after market, factory yamaha piston is 13:1.
In answer to your question, No, I have no gotten one yet, I am waiting to hear more about them. Not sure if you can still run normal pump gas with it?
YOu can order it form your local yamaha shopr. However, I have not heard of any place that has them yet.

 

yeeeahhhh......I dont know where he got his hands on that piston? Good question!!

 

Umm stock comp. on what?? YZ450 is 12.5 and YFZ450 is 11.9... HMMMM What has a 65mm bore and 13:1 comp. stock???

 

thats what I am saying! Someone is just confused.

 

sorry guys, my bad, was just looking up some crotch rockets and it kinda crossed my mind, that yz is fast as heck for stock anyways, why would u want a new piston?

 

people are power freaks........I am one of them. I think the thing is going to be rediculous once I get an exhaust for it. let alone, starting to dink around with the motor! I'm going to wait on the piston though, see what others think. I dont really want to be mixing gas. Thats part of the reason I like having a 4-stroke.
I will be dling the "cam mod", or I will just get the yzf exhaust cam. One of the two.

 

My friend works for Yamaha, He has a couple for testing. I have done some test riding for him at Carslbad and Racetown and it works awesome. Yes there is a bunch on B/O, but they will be getting them in soon (probably 2-3 weeks tops).

 

I would be surprised if you can run pump gas with the 13:1 comression piston. I know I would go ahead and just run race gas.
But first I got to learn how to keep the front end down on the bike the way it is. WHAT A GOOD PROBLEM TO HAVE!..[img]i/expressions/face-icon-small-happy.gif[/img]