So I just did a top end rebuild on my 03 400ex new piston, cylander aftermarket cam without the compression mech and all new valves n seals etc. I didnt bore it out I just swapped it for new. Had a crazy tick to it bent valve but figured while I.had it open mine as well do the whole top.
The rest of the bike is stock from what I was told when I.bought it and from what I can see. This is my first rebuild I am familiar with engines for the most part as I do work on cars often. I got it all back together and have a little smoke but figured it was just oil burning off the top end as the smoke is coming from there. So I did a compression test just to see what I got. I’m at 160psi pretty high in my opinion. But the bike runs well better then it did before the rebuild. I havnt riden it much since I just did the rebuild yesterday and I’m starting the break in process or gonna start it. Do I have to mess with the.carbs now? Why is my compression high any help would be appreciated. Small engine then what I’m use to working on maybe forgetting something or missing.something.