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nneed help, popping noise from rear of bike


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first off let me start off by saying that im a heavy set guy, 6-2 280-300lbs. when ever i take off drag racing or even get on it hard, it feels like a carrier bolt has come loose and hits the sprocket

hub. it really does it the most when my suspension is compressed, like when i hit the bottom of a dune and start to go up and nail it, it pops bad. its like a grabbing pop. it will jerk the bike and slow it down. i bought the bike used 4 years ago, it did it a little when i got it, since then i have replaced several parts( not chasing the problem just upgrading) sprockets, chains, ext. swingarm

(6in). chromed my carrier so i have replaced bearings. could my chain be alittle to tight and it be streching when my susp. is compressed?????? my axle is out now and i was hoping to find that my sprocket hub has been rounded off internally, but i dont see any signs of that happening.

any help?????

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first off let me start off by saying that im a heavy set guy, 6-2 280-300lbs. when ever i take off drag racing or even get on it hard, it feels like a carrier bolt has come loose and hits the sprocket

hub. it really does it the most when my suspension is compressed, like when i hit the bottom of a dune and start to go up and nail it, it pops bad. its like a grabbing pop. it will jerk the bike and slow it down. i bought the bike used 4 years ago, it did it a little when i got it, since then i have replaced several parts( not chasing the problem just upgrading) sprockets, chains, ext. swingarm

(6in). chromed my carrier so i have replaced bearings. could my chain be alittle to tight and it be streching when my susp. is compressed?????? my axle is out now and i was hoping to find that my sprocket hub has been rounded off internally, but i dont see any signs of that happening.

any help?????

 

I noticed a similar problem with mine. It felt like the chain jumped a tooth occasionally when I romped on it accross rough sand, but there's little chance that happened on mine b/c chain tension is perfect, brand new carrier, sprockets, etc. It didn't happen from a dead stop on smooth ground what so ever. I concluded that my sprocket has to be occasionally dragging the ground over bumps..I don't know. If your skid plate is intact, then that couldn't be your problem.

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mine pops whenever i go through mud. i think the mud loads up in the chain and makes it slip on the rear sprocket. all i have to do to fix it is ridethrough some water to clean the mud off.

 

mine also makes a popping/grinding noise when the suspension is more than 70% compressed. i found out this is because the chain rubs on one of the plastic chain wheels. i can re produce the sound by compressing the rear end with a tie strap and manually rolling the banshee foreward while listening at the chain wheel. each link of the chain makes a grinding noise when it comes in contact with one of the wheels.

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check your sprocket condition. that popping can happen when your suspension is compressed on a hard take off. whats happening is your chain is jumping teeth on the sprocket. if your chain is a little too loose and the sprocket work its very possible for the chain to jump teeth.

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Mine does this sometimes at walden. One of those things that I would hear and just cringe until I found out what it was... Going up the big sand hill my rear sprocket would drag in the sand and load up with it. It would be so much sand compacted between the chain and sprocket it would pop and jump teeth. I marked the chain and sprocket with a grease pen and sure enough it would jump 3 or 4 teeth by the end of the day. Buy a new chain and sprockets and re-adjust the tension and you will be good to go. Don't remove your rollers it will jack stuff up more than likely.

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Mine does this sometimes at walden. One of those things that I would hear and just cringe until I found out what it was... Going up the big sand hill my rear sprocket would drag in the sand and load up with it. It would be so much sand compacted between the chain and sprocket it would pop and jump teeth. I marked the chain and sprocket with a grease pen and sure enough it would jump 3 or 4 teeth by the end of the day. Buy a new chain and sprockets and re-adjust the tension and you will be good to go. Don't remove your rollers it will jack stuff up more than likely.

 

What sprocket did you mark and how many links do you have in your chain? If you can'd divide the number of links in the chain by the number of teeth on the sprocket you marked your grease pen and get an even number the marks are useless. Just think about how many teeth are on that sprocket and how many links are in the chain. If your chain is 118 links and you have 41 teeth on your rear sprocket the sprocket will rotate 2.87804878048780487... times for every single rotation of the chain. Will your marks line up after the chain rotates 1 time? How about 3? Maybe 2,878 times it will.

 

A better test would be to mark the axle and the sprocket hub and see if the hub is spinning on the axle which I bet it is. My sprocket hub can spin back and forth maybe 1/8-1/4 inch at the teeth and I know if I drop the clutch it's going to jump splines.

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What sprocket did you mark and how many links do you have in your chain? If you can'd divide the number of links in the chain by the number of teeth on the sprocket you marked your grease pen and get an even number the marks are useless. Just think about how many teeth are on that sprocket and how many links are in the chain. If your chain is 118 links and you have 41 teeth on your rear sprocket the sprocket will rotate 2.87804878048780487... times for every single rotation of the chain. Will your marks line up after the chain rotates 1 time? How about 3? Maybe 2,878 times it will.

 

A better test would be to mark the axle and the sprocket hub and see if the hub is spinning on the axle which I bet it is. My sprocket hub can spin back and forth maybe 1/8-1/4 inch at the teeth and I know if I drop the clutch it's going to jump splines.

 

 

I was wondering the same....about marking the chain the sprocket.

 

hellride96 I agree with the sprocket hub theory. Mine is a 2006, though. That shouldn't happen on mine.

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In my experience, it is a fairly normal thing to hear that popping sound when riding in sand, under a lot of power, with the rear chain guard still in place. I've had three shees (and a number of friends that have them too) and every one of them has done this.... until the rear chain guard is removed. I don't want to speculate on what exactly is causing the popping sound, but it must have something to do with sand accumulating between the chain and the guard, because once it's removed the popping is gone. I've never witnessed any extreme damage come from this, but if it bothers you just take off the guard.

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I had this problem with mine when I had the stock swinger on it. I found that unless the carrier bolts were tight as a mf'er, the carrier would someone slip forward while riding. Then when I would either jump and gas it hard upon landing or take off hard on pavement, the carrier would slam back against the adjuster bolts. This produced a wicked sounding pop. I was sure something was shelling out the first time I heard it. May be something to look into.

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ok mine has done that also. first you have to make sure that you have all of the sliders,rollers, and guids in place. then make sure all your motor mount bolts are tight and you have good motor mount rubbers (1 in the front left and one in the rear right.) And be sure you have your two braces underneath the motor. Everybody can speculate on what they "THINK" is the problem but I can asure you that it is a combo of a number of things. Aside from what Ive said above You also have to have a good chain and sprockets. I bought a brand new loanstar swingarm and even though it was big bucks I still had to take a grinder and open up the slots so it would tighten down more on the carrier. If not it would loosen up my first time on the gas. Ive had to deal with this "popping" problem alot in the past. But all speculations aside Its mostly shit (sand) in my case getting caught in between the chain and sprocket.

Edited by DUB
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