I have a newly aquired 900 T cat with zero knowledge of its past history. A compression test shows the center cylinder @ 100psi. with the outside two making around 120psi. After pulling all 3 pipes off and probing around with a flashlight the cylinder walls and pistons all look great with the exception of some darkish black shading under the bottom ring of the low center cylinder. Its not a caked carbon buildup but just some blackish color on the front of the piston body, there is no scoring that I can see on any of the three cylinders or pistons from what is visable through the exhaust ports. The sled purrs like a kitten at idle and has no obvious defaults while running.
My question is, is it time for new pistons/rings/nicasyll(sp)? Total top and bottom refressh? Or will just new rings suffice? pardon my ignorance but Im new to this whole two stroke thing?
My question is, is it time for new pistons/rings/nicasyll(sp)? Total top and bottom refressh? Or will just new rings suffice? pardon my ignorance but Im new to this whole two stroke thing?