I bought this cheap old Yukon Trail Badger mini-bike a couple Christmases ago for my son and have kept it running despite the fact it is really a cheap poorly manufactured mini-bike. I have finally reached the limit of my mechanical ability (which isn't much) with an issue with the chain continually falling off. There are two plastic chain tensioners as shown in the photo that are fairly worn, but i don't know if that is the issue with the chain not staying on. I have had to lossen the enging mount bolts a number of time and move the engine forward to tighten the chain because the top chain tensioner has worn and due to other issues that have caused the chain to continually come loose. I know the bike is a POS but with a little TLC I've kept it up and running and my boy has had a lot of fun on it. The issue with the chain popping off has got me stumped and my first guess is that the plastic chain tensioners are the problem. There appears to be an issue with the chain lining up properly from the front to rear sprocket through the plastic chaing tensioners. It looks to me like the chain tensioners are causing the chain to bend slightly between the front and rear sprocket.
I would really appreciate any advice on how I can get this cheap old mini bike chain to stay on. Does anyone know a good place to buy these types of plastic chain tensioners? Another question I have is if there are any known modifications I could make to this type of chain assembly that would reduce the frequency of the chain coming off of the rear sprocket. The teeth on the rear sprocket seem quite small and I am also wondering if a better chain and rear sprocket might help keep the chain from coming off all the time.
I would greatly appreciate any advice on how to repair and fix once and for all the continual issues we ahve had with the chain staying on this cheap kids mini bike. Other than that the bike runs great. I hope I can get it running again because my son has had a blast on it when the chain has stayed on.
Thanks for any help.
Brian
I would really appreciate any advice on how I can get this cheap old mini bike chain to stay on. Does anyone know a good place to buy these types of plastic chain tensioners? Another question I have is if there are any known modifications I could make to this type of chain assembly that would reduce the frequency of the chain coming off of the rear sprocket. The teeth on the rear sprocket seem quite small and I am also wondering if a better chain and rear sprocket might help keep the chain from coming off all the time.
I would greatly appreciate any advice on how to repair and fix once and for all the continual issues we ahve had with the chain staying on this cheap kids mini bike. Other than that the bike runs great. I hope I can get it running again because my son has had a blast on it when the chain has stayed on.
Thanks for any help.
Brian
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