Is 130 psi bad for a compression check on the DS650 w/o disabling the decompressor?

 

Hey scooby not sure on the compression issue ill run a test on mine tomorrow and get back to you on the results. Was wondering if you know the autometer tach part # so i could see if i could get it cheaper through someone else.
THANKS.

 

I bought the tach over a year ago from woods, so he could be using something differnt now. My tach is labeled 19205-0802. It is an autometer Pro-Cycle 3 3/4" 10,000 RPM backlit tach. black background and face, white rpm numbers, yellow tic marks, orange needle.

What was your compression reading?

 

The motor measured 215psi with the auto decompression temporarily disabled. According to the formula:

compression = 14.7*(CR)^(1.1 to 1.2)

we should be somewhere in the range 180 to 225, so my motor is fine.

The valves may be a little too tight though.