Compression?

[slk23022]

On my final session of my last track day I felt the power at the top end significantly decrease.
I thought it was rebuild time.

(would be my first time)

145 psi compression
Lean plugs

Bone stock 2000 rs250.

So.... Any thing I should be concerned about? Is 145 acceptable?

[Micah / AF1 Racing]

145psi is very healthy. Stock fresh buds are usually around 134-137 on my tester. You only mention one cylinder, did you test both?

[slk23022]

Both....
Hmm.... Any symptoms of a rebuild? I'm on 4000 mi (all track days) and still no rebuild... Im growing cautious.

[Micah / AF1 Racing]

Do a top end. New wristpin bearings, pistons and rings. Yours is ok now but with that mileage the pistons are tired and so are the rings. Peace of mind is priceless.