I did a compression test on my Rc51. I did it with a cold engine. When I put the gauge in the spark plug section (under the tank with the throttle rolled) I get a compression of slightly below 120. This also goes for the bottom part of the engine, I nearly get the same result. If you look at the compressor tester on the pictures below, you will notice that the results come out borderline.
I would like to pinpoint the exact problem so I can have my local race shop fix it versus having to find out what is going on and then fix it. Money is tight so I would like to save as much as I can.
An idea was proposed that I should do leak down test. Thoughts and ideas? Thanks guys for putting up with me
How many miles are on it? Was it running bad? Why did you do a compression test? When was your last valve adjustment? I would recommend a leakdown test.
The reason why I did a compression test was because engine got up to 254 degrees when I went to go put gas in it at the gas station. When I got home I found out there was a big coolant leak, my left radiator has a crack and it is not repairable. Also noticed I had a small gas leak, I swapped tanks and did a compression test to be sure. bought the motor with 10k miles on it, not sure if it was races or not.