Thread: Piston wash check (GPR)
09-10-2007, 07:15 AM #1
Piston wash check (GPR)
Ski is a 2001-12r
I was surprised to see this grayish color on the top of the first two cylinders when I pulled my head this weekend- What is that an indication of ?
Ski is running good - no signs of trouble. I just swapped heads to experiment a little.
09-10-2007, 07:18 AM #2
i think u have the wrong pics
09-10-2007, 07:19 AM #3
Last edited by mrbtd; 09-10-2007 at 02:19 PM.
09-10-2007, 07:20 AM #4
First two pics are #1 and #2
this is #3
09-10-2007, 08:05 AM #5
How many hours? Had a yz125 with about 200 hours on the topend and it was all black.
09-10-2007, 02:16 PM #6
100 hours --- From everything I have researched today the gray is an indication of lean.
I just found that the fa adapters for 1 and 2 were loose @ the base. I am also jetting up to 125.
09-10-2007, 02:20 PM #7
It does look a little lean! Not bad, maybe a quick check of your internal filters and such is in order.
09-10-2007, 02:28 PM #8
I agree, it looks a bit on the edge and I would richen it up a little. The grey is a bit weird though.
09-10-2007, 03:08 PM #9
Looks lean and hot.
Richen it up and you might want to do a leak down test for air leaks.
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