951 compression

[Dogbite]

I did a compression test on my 1998 xp limited and it was 120 on both cylinders. Is this okay? I can't seem to find any specs online. It runs great at wot, 60 mph at almost 7000 but it pops out of the back between 3000 and 4000 rmps. I have replaced the tempo fuel lines and rebuilt the carbs with mikuni kits. Spark plugs are black after taking it out a couple of times.

 

[mikidymac]

130 psi is perfect and at 110 it’s done. Yours at 120 and still pulling 7000 rpm I wouldn’t worry about it at all.

The rumble at 4000 rpm with steady throttle is perfectly normal and just resonance in the muffler.