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Discussion Starter · #1 ·
The Grom has less than 200 miles on the odm and this morning I decided to check the compression since the my adapters for my compression tester came in and I did not have a small 10 mm spark plug adapter.

I checked the compression with both of my testers and I got between 100-105 psi with a stone cold engine with no warm up.

setting up the test with my old tester


second tester reading 100-105psi


testing heat on the exhaust, heads and cylinder, warmed up the engine a bit

head temp around 160-171 deg F


cylinder temp 160-180 deg F WOT




exhaust temp taken from the pipe leaving the head 311-337 deg F WOT
 
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