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Discussion Starter · #1 ·
i finished my 1989 polaris 400 today and it started up fine but when i push the throttle, the track doesn't spin. all it does is rev high and then it spins a little. what could be wrong?
 

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15,722 Posts
broken primary spring, stuck weights??
 

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Make sure the clutch and track/tunnel is free of obstructions too.
 

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If you turn the secondary clutch, does the track turn freely?
 

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It may seem stupid but do you have the parking brake off?
 

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^^^this may also be dumb but do you have the right size belt
 

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Discussion Starter · #7 ·
the track spins freely without the belt on and i made sure the parking brake was off but it still did the same thing. and the shop that i got the belt from said that it is the right one.
 

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Make sure the sled is firing on all cylinders....

It may rev, but not have any power.
 

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Discussion Starter · #9 ·
both cylinders have the same compression and i put new spark plugs in it and now both of them are brown after starting it
 

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Pull the belt off and fire up the sled... Hit the throttle a couple times to make sure that the primary is opening and closing properly.
 

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Have you set the belt deflection?

What exactly did you "finish"?

And how long has it run to turn the plugs brown?
 

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polarisrider98 said:
what is the belt deflection?
i am not sure what he mean for sure either, but i know there is thing on the secondary to open and close the clutch to get the belt riding in the correct spot

no i know what he meant you can adjust the distance between the clutched buy adjusting one of the engine straps it it has a little bolt you turn to push the engine forawrd or back
 

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Discussion Starter · #15 ·
Ugly_old_Poo_kid said:
Have you set the belt deflection?

What exactly did you "finish"?

And how long has it run to turn the plugs brown?
all i did was finish putting some of the engine together and it ran it didnt run that long before they turned brown
 

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sounds like you need to get a manual and read up on your sled. You can download the master service manual for your sled here:

http://www.vintagesnow.com/Polaris.html
 
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