I am from asheboro nc. So no one here has a clue how to work on a sled. I have a 1988 polaris indy 650. Plans are to dirt drag it in the spring but it has a few small issues. Under acceleration it makes noise and sounds Like the track is slipping the main drive belt looks good. Chain and sockets seem seem to be fine. Drive shaft bearings seem good. There is a bad idler wheel on the rear inside of the track. The track also seems too loose and doesn't have anymore adjustment at the rear. Any ideas?
snowmobile newbie needs help
- Thread starter nolimitlarry
- Start date
That crunchie sound usually comes from the chaincase...chain is loose. just loosen nut closest to the case and turn bolt in until she gets snug then back off a hair, you are snugin the tensioner. oh yeah, retighten the jamb nut. I think your alowed a half to an inch or so of slack on the track , measured from bottom of hyfax to track off the ground.guess I haven't seen one out of adjustment before it was trash.
It sounds like the track is ratcheting on the drive sprockets. This usually happens when the track is too loose. If you have no more adjustment on the track tensioner bolts there has to be something wrong. A track won't stretch that much on its own. I wonder if someone has put smaller wheels on the back axle for some reason. They should be 6 3/8" diameter. Do you know if the track is original or has someone changed it?
Track looks pretty worn I am guessing its original. The chain is tight that was my first idea. Only thing I see wrong is the one worn out wheel on the rear. Where is the best place to buy a new track?
Check your drivers, are they ok or rounded over/chewed up. Check the drive lugs on the track, if everything is ok have a good look at your skid rails, are they cracked and bending under load. I have never seen a track stretch to the point where you run out of adjustment.
Any idea what track size this sled needs
If it is a standard Indy 650 it came with a 15" wide x 121" inch track. Count the windows on the track you have now. There should be 48 of them which makes it a 121 inch. The only other option is it being a 133.5" track which came on the SKS model but I am not sure that was offered in 1988. I believe it came in 1990 but anyway if it is a SKS it should have 53 windows on the track.
If someone tried to long track this sled and did not put in the right extension that would explain why you have no adjustment left. If you look at the back end of the rails where the axle sits is there a short extension bolted on to the rails?
If someone tried to long track this sled and did not put in the right extension that would explain why you have no adjustment left. If you look at the back end of the rails where the axle sits is there a short extension bolted on to the rails?
Am I missing an adjustment ? Is there more than just the rear adjuster
No, just the rear axle adjustment.
Here is an exploded parts diagram of the suspension for your sled. Does your suspension look exactly like this especially where the rear axle is?
http://www.cycleworks.com/fiche_section_detail.asp?section=245818&category=Snowmobiles&make=Polaris&year=1988&fveh=5838
http://www.cycleworks.com/fiche_section_detail.asp?section=245818&category=Snowmobiles&make=Polaris&year=1988&fveh=5838
Rear axle looks the same but I have some kind of adjuster bolt near the shock I moved it some with the axle adjuster loose but broke the axle adjuster bolt before I could see if it helped anything.
Don't take this wrong but did you loosen the axle bolt first (#20 on the diagram.) before trying to adjust the tensioner bolts? I'm not sure what you mean by an adjuster bolt near the shock.
Yeah I loosened the axle first. I really can't describe the other adjuster I will post a picture of it when I get off the road in a day or two. It almost looks like this adjustment would raise the rear suspension if that helps any.
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