Help!!!Motor trouble...

[Kachess]

Three years ago I bought a mountain sled with a Bender stage one installed (no head shim). It ran mostly ok but burned oil (i thought in the turbo) and was a little doggy for a turbo. I finally pulled the turbo off late last year and now realize it's real doggy as a stocker. The compression is good and even in all cylinders, better than my other two good running tons. I made a leak down tester and all the cylinders bled down at the same rate (not sure what a good rate is). At one point it would not idle on all cylinders but I swapped carbs with another ton we own and now it idles on all. I checked valve clearance (the previous owner said a mechanic had messed with them) and they were almost all less clearance than spec, but they all had some clearance, so I didn't mess with them. It's main symptoms are a strange, muffled, exhaust tone (i thought it was due to the turbo when it was installed), not a snappy throtttle response, less power, and the smell of burning oil after running hard. I dread tearing into it and just want to rule out anything, easy.

 

[RedRocket]

So what are you running for an exhaust? There is no turbo on it now correct? Was the jetting changed at all for the turbo? Is the air intake stock?

 

[gsxr]

check for a collapsed flex pipe !