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6 Posts
I got an 88 550 stand up and it doesn't seem to rip like it should. Its got shaved heads and 157psi compression in both cylinders. A coffman pipe, primer kit, finger throttle, skat track 15.5 pitch prop, aftermarket intake grate and ride plate. I recently also installed a freestyle cone. I rode a bone stock 1989 650 and it was way more powerful than mine. If I hit the revs just right mine rips like theres no tomorrow for about a half a second and is faster than that 650. but otherwise It just doesn't compare that one was stock and mine is heavily modified. I've replaced some of the fuel lines becuase they had pinhole leaks new plugs but i've run out of ideas on wht to check fix ect. Can anyone help me out. and I run synthetic oil mixed 40 to 1