Compression?

[goncrazy99518]

I have a 96 600 xcr not the sp. Was wandering if anyone knows about roughly what the compression should be on this motor. I have run through everything as far as needle and seats hold 5 psi all day and the fuel pump holds 6 psi all day long. carb boots are good, got good spark. Chokes have new plungers and set right. my compression is 105 on recoil side and the other two are 115. The sled just won't start. haven't checked timing yet. got it too backfire once. Was riding one day and the next morning came out and the sled never would start again. Any help would be great. When it was running it ran great good color on spark plugs.

 

[X2Freeride]

I have a 96 600 xcr not the sp. Was wandering if anyone knows about roughly what the compression should be on this motor. I have run through everything as far as needle and seats hold 5 psi all day and the fuel pump holds 6 psi all day long. carb boots are good, got good spark. Chokes have new plungers and set right. my compression is 105 on recoil side and the other two are 115. The sled just won't start. haven't checked timing yet. got it too backfire once. Was riding one day and the next morning came out and the sled never would start again. Any help would be great. When it was running it ran great good color on spark plugs.

105 is pretty low as is 115. 125 or so should be where you want to be.