650sx compression problems

[Snowcon1]

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

 

[Quinc]

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.

 

[john zigler]

Stock, a Kaw 650 should be aprox 150 psi. I doubt both holes are 60 psi low. Most likely a bad/cheap compression gauge.

 

[Harbor]

Iam sure it's a scam, go around with a gauge that reads low and knock the price down on unsuspecting sellers..

 

[SUPERJET-113]

Iam sure it's a scam, go around with a gauge that reads low and knock the price down on unsuspecting sellers..

Yeah I've heard of that before too...