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Old 02-02-2010, 05:22 PM
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Exclamation HELP! Tightening a loose Chain

I have a 95 Polaris 300 2x4 and we just replaced the front sprocket and the chain is extremely loose and I noticed today it's still slipping some because the bike snatches really bad and I don't want to mess another sprocket up. I was wondering how to tighten the chain.
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Old 02-02-2010, 06:33 PM
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there are two ways to do this. the first way is which makes the major difference is the number of links in the chain. unless you have changed gearing, you need to have the OEM amount of links. although for your machine i dont know for sure, it should be in the neighborhood of 96 links. it should be in your owners manual if you have that, and if not, a service manager should be able to verify the amount of links. if you are not absolutly certain you have the correct amount of links, you need to start there. the chain may need to have a few links cut off if it is too long.

once that is squared away, this is what you do.

in the image below, you want to your machine loosen the two bolts #33 in the diagram as loose as they will go without actually taking the nut off of the bolt. you shouldnt need to, and if you can help not taking the nut off, it will make reassembly easier. once the two #33 bolts are loose



now, in the diagram below, look at #28. that is the fine chain adjustment. #28 is clamped down in the swimarm by the two bolts you just loosened. on the outside of the housing, there should be a hexagon shape built into on one side. this allows you to stick the proper size big wrench on it and rotate it. #28 is egg shaped, it is a big lobe. if you rotate the lobe (thicker section) toward the front of the quad, it moves the axle rearward, thus taking up chain slack, and vice versa, rotating the lobe to the back moves the axle forward creating more chain slack.



like i said, this is a fine adjustment, but also critical. need to verify the correct amount of links. also in your book should be chain adjustment slack, or the dealer should be able to tell you that as well. probably going to be 1/8 to 1/4 of an inch is my guess. if you tighten the chain too much, you run the risk of crushing the countershaft seal and leaking out the tranny fluid.

hope that makes since. confused or any questions just let me know
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Old 02-03-2010, 12:05 PM
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Should I raise the backend of the bike up off of the ground?
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Old 02-03-2010, 02:00 PM
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mmm...depends. you will have to see what your manual says. your owners manual should say what the chain adjustment it, and wether or not the wheels should be off the ground. sometimes it is recommended to adjust it when there no weight on the rear swing arm, and sometimes you are supposed to do it with weight. if you dont have a manual, call a dealers and they should know or have a manual they can look it up and tell you
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Old 02-03-2010, 03:03 PM
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Well we just worked on it and got the chain tightened, thank you so much you were alot of help! I appreciate it.
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Old 02-03-2010, 03:12 PM
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no problem...not too hard was it
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Old 02-03-2010, 03:17 PM
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Nope lol. Once we figured out what needed to move it was easy.
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Old 02-03-2010, 04:17 PM
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i believe on anything prior to 2000 they were wanting the suspension bottomed out,then adjust chain for slack.3/8" -3/4"
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