Re: compression test
1. Have fully charged battery.
2. Ground coil wire to prevent sparks.
3. Open throttle to WOT (prevents sucking fuel into the cylinder being tested)
4. Remove ALL spark plugs
5. Crank engine to max compession (Don't go crazy waiting on each 1 lb increment, max compression of major gauge movement.)
6. Compression on your 125 should be in the 145 to 175psi range, and within 15% of each other.
