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Old 08-29-2005, 09:02 PM   #1 (permalink)
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speed formula 500?

how fast shuld a bone stock 96' skidoo formula sl 500 go with 3400 miles? a local mechanic said it suld go about 90 but it only goes 60. when i hav it up there it randomly ticks but when it does its LOUD. the carbs are clean and it runs great at lower speeds except it picks up pretty slow but i think thats is because its old. wat could be holding it back??

how often should the hyfax be replaced?
and will any modern rear suspensions fit this sled??
thanx for any help
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Old 08-31-2005, 04:52 PM   #2 (permalink)
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i have a 1987 ski-doo saffari. its a 377 and is all stock. it has really good take off and i can get it up to about 60mph. my mom said when she first got it it could do like 70. and it has around 4,000 miles on it.
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Old 09-01-2005, 12:23 PM   #3 (permalink)
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Your pistons and rings might be worn out. You might want to rebuild your motor. Depending on snow condidtions, you may get 10,000 miles on a set of hyfax, or a few miles. Even so, you should replace them at least once a year. And concerning a suspension upgrade, I think the FAST M-10 would fit in your sled.
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Old 09-01-2005, 02:50 PM   #4 (permalink)
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it has great compression so i dont think it could be the pistons/rings. could it be the clutches or driver wheels?? this sled has to hav more speed cuz my moms 01' 380 can beat it.
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Old 09-02-2005, 05:41 AM   #5 (permalink)
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Take it across a lake or something wide open, then immediately shut it down. Check to see what the spark plugs look like. If they are a whitish color, it's running too lean on top end. You can change the main jets larger if so. By what you're describing, it's starving for fuel on top end, or the clutches aren't operating all the way.
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Old 09-12-2005, 10:22 AM   #6 (permalink)
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have you ever blown a belt? sometimes the shaving and little ropes that hold it together get rapped on the clutch driver and lock up the bearings or washer and create friction which might make the ticking and bring down the speed....good luck
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Old 09-12-2005, 03:25 PM   #7 (permalink)
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had my 97 500 formula de-luxe up to 95ish (speedo).
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Old 09-12-2005, 04:04 PM   #8 (permalink)
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thats awesome for a 500 deluxe i think!
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Old 09-12-2005, 04:48 PM   #9 (permalink)
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...it is bored out a bit
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