650sx compression problems

Joined
Aug 22, 2018
Likes
1
Location
Lake Orion Michigan
#1
So while trying to sell my 650sx this guy came and when he tested the compression it read 90 each cylinder. The weird part is the ski starts right up still has lots of power (for a 650) never had any issues. So could it be a bad tester? Cause I’m assuming with 90 compression it would hardly even start let alone run perfect. Any advice would help, hopefully I don’t need to rebuild the whole top end
 
Joined
Feb 19, 2013
Likes
4,659
Location
Chico California
#2
Buy or rent a gauge and check it yourself? Also make sure you use the correct connector threaded all the way into the sparkplug hole etc.
 
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