Top end rebuild questions

T

TGM_OFFROAD

Member
Hello All, I am in the process of replacing the top end of my 2018 XC300 and since it is my first time on this bike and first 2 stroke in a long time I figured I will have at least a few questions for the internet gods.

First question, when cleaning my cylinder I scraped all gasket material from the head including the right side power valve gasket. In doing so the gasket came off in pieces. This did not concern me because I assumed it came in the gasket kit I ordered. Well the gasket kit does have a right side powervalve cover gasket but it is paper thin while the one I cleaned off was about 4-5mm thick. I see on the parts diagram that there is a 6mm gasket shown. The question is why is this such a thick gasket and if it is supposed to be a thick gasket why would a thin one be included in the OEM gasket kit.
 
Has to be the thicker gasket, to clear the power valve actuator.
I ran into the same problem, thin one won't fit.
 
The later bellcrank assembly (2015+) protrudes further than earlier models and requires the thicker gasket for clearance.
 
They gave you the wrong kit buy the sounds of it. The top end kit I ordered had one in it. I will see if I can find the part number.
 
I?ve been using the back of an axp bashy (cut out with a bandsaw)for a spacer for 250hrs now. The oem items fall apart on removal.
 
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