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While the sled is on the stand and after making the track spin, the clutch disengages but the new belt still rides the shaft and spins the track. If it were on the ground the track wouldn't spin. The idle is 1900 rpm and it goes back to idle after I let off throttle. The entire airbox is off, could this be making it stall back trying to hit WOT ? And also the temp is in the 50s.
The head pipe and muffler I had taken off to paint and they are clean on the inside, nothing clogging the pipe.
When the sled is started, all three cylinders are firing and it sounds like a triple.
When I apply throttle, slowly raising the rpms, the track spins when it hits 4000rpm and then I hit it, giving it WOT in a punch. IT screams and sounds and feels like it will go 100 in a field. I let off the throttle, the sled rpms drop to idle, and I do the same scenario again, but it wont scream and rev like it just did, it sounds like a deep mushy bellowing, with the rpm stopping at 5000 rpm when giving it WOT. Nothing is clogged in the fuel system, carbs are all tuned the exact same, clutches engage and disengage normally.
I had another clutch laying around from a xcr600 that was in working order last winter. I took the 650's off and swapped it with the xcr. It ran just the same.
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1995 XCR 600 (blown crank, dropped in a nice 580)
1991 Indy Sport 440 fan
1989 Indy 400 lc
1988 Indy 650 lc
1988 Indy Trail 488 fan
1980 TX 440 air
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