alright well on my vbike my chain is really loose. sometimes it'll come off when im driving, dont want that happening when im riding on a steep hill!!! if i take a link out then it wont fit because its to tight. is there anything i can do about this to make it a little tighter?

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vbike v4s-250
renthal bars
renthal chain

 

besides buy a new chain? loosen up the axle carrier bolts and chain adjuster all the way, now move the axle assy all the way forward and then remove the master link now check to see if you can remove one inner and one outer link,

 

Have you tried to adjust the chain yet by loosening the to large axle carrier bolts and turning the the carrier in the direction that tightens the chain? The carrier is offset and will loosen or tighten the chain depending on which way you rotate the carrier. This is how my V4S works. Hope this helps.

 

My wife's Vbike developed the same problem after a few hours of use. Took the swing arm apart and the rubber was shot. I looked at my sons Hanma R9 and found that they actually used a roller bearing for the swing arm. I contacted Tim at Vbike and he sent me another set of swing arm bushings. If these do not work I have a friend that will make me some solid bushings out of hard plastic or brass. I already tried to match the OD and ID with existing bearings but did not have much luck. Looks to me like the bushings were probably installed wrong. Not suppose to hammer on the inner sleeve when installing!

 

thanks for replying ghcoe, coloradotrailrider, and luvmysxs. Ghcoe, ive tried to order parts from tim before and he would never call back so i would call back. I tried for a month to get parts for him than i gave up and fixed the problems myself. Luvmysxs, i bought a renthal chain just a couple month's ago, i dont think it would be time for a change yet right? Coloradotrailrider, i'll try that today see if it does anything. thanks everybody.

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vbike 250-v4s
renthal bars
renthal chain

 

I checked the tightness of the swing arm on my Vbike V4S and the bushings are nice and tight. My TaoTao 150 however has some loose swing arm bushings like ghcoe has.

I put a 14 tooth front sprocket on my V4S today and had plenty of adjustment for the chain. The new sprocket is smaller than the orginal 15 tooth, so this requires the chain to be adjusted up even more. When the to big bolts are loosened up on the center axle carrier the carrier rotates forward to tighten the chain. Looks like it has plenty of adjustment.

 

when i tried to rotate my axle carrier it barely moved. well tomorrow moring im gonna take it to a guy that sells chinese atv's and parts and he'll look at it for free and try to fix it but before i take it there i'll try one more time to rotate it. maybe i'll have luck and it will rotate. thanks

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vbike 250-v4s
renthal bars
renthal chain

 

I replaced my swing arm bushings this weekend. I had a little problem with Tim but he took care of me in the end. He wanted me to send him the old bushings before he would send me the new ones. This would completely take the quad down and I had a couple of trips planed. I sent him some photos of what I found and he sent them right away. He always called back when I left a message though.

To me the bushings are a poor design. I checked my sons Hanma and they used a actual roller bearing. I tried to find a roller bearing that would fit in the Vbike but could not find one with the correct inside and outside diameter. While I had it apart I also had to re-weld a nut that held the axle carrier to the swing arm. Upon inspection I found that one of the other welds on a nut was cracking so I went ahead and re-welded all the nuts to the carrier. They only used two spot welds to each nut which is weak to me. The nut that had broke also allowed the axle carrier to shift forward on that side and allow the sprockets to be out of alignment. I think this was the biggest problem of the chain jumping off.

I have a friend that is a fabricator and he said he could probably make me some new solid bushings out of brass or hard plastic. I think this would be a good alternative over a roller bearing. I think the front suspension uses the same bushings and maybe this would be a good replacement for them as well as they wear out.

On a side note, when I pulled the axle out of the carrier I found that the seal flange on the sprocket was dinged up and the seal was not able to seal properly. I could already see that water had worked its way to the inside. I have not driven through water and have only driven it in heavy rain and wet/muddy roadways. If used to ford a creek I believe it would have allowed a lot of water to inter the carrier and get to the bearings. It was easy to bend the seal flange back into shape with a small punch and light tapping with a hammer. Also the edge was pretty jagged and I filed it down smooth as to not damage the seal when I reinstalled the sprocket.

I will be talking to my friend about making those bushings soon, so if anyone is interested let me know I might be able to work a deal.