Bye bye bicycle :(

yeah thats what happened with my dad's outboard motor it just sheered that pin and he lost the prop. Better than an engine. if he sheered the pin like that it would be a blessing.

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visit my blog for Riding in the hood,... The home brew bike journal....http://frictiondrivebicycles.blogspot.com/ The deacon's fiction

The is a small key on the front sprocket and small keys on the clutch and the small gear on the engine all are fairly easy to get to by using the puller that comes with most engine kits do put a little oil or never seize on the puller threads before you use it as it helps to keep the threads from gauling.
I did a modification to the idler bolt I used the lathe and drilled the bolt out and use a high grade bolt through the idler and can pinch it down so it won't move or loosen up. I also have drilled and taped the idler mount and put in a small bolt or sheet metal screw so the idle mount can't flop over into the spokes. That way I don't have to walk home and drag the bike cussing all the way.
I have a post on the bikes engine total tear down shows all keys and where they are all you need to do is look at it.

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norms-iron-works.tripod.com

Thanks for the tips guys, I'm going to dive into it tomorrow. In the future, I'm going to put a screw or some type of pin to stabilize the tensioner.

If you guys want to see the destruction, check out some of the pics: Tensioner Disaster

a true mess glad you survived it.. My wheel looked a lot like that I just took the tire and tube off and junked it.

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visit my blog for Riding in the hood,... The home brew bike journal....http://frictiondrivebicycles.blogspot.com/ The deacon's fiction

Wow ! Glad you were not hurt !
I read this and took mine off. I took another link out and the chain fits fine without it.

Thanks for the heads up and showing this !

motorbiker

I hope you got your chain/sprocket all worn in before you chucked the tensioner.

I got rid of the buttery, easy strip bolts that held the tensioner on and used grade 5 bolts. I also used big, cupped washers under the tensioner.

I've never had one come loose.

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If it ain't broke, and you mess with it long enough, it will be.

Norman
When you say"I also have drilled and taped the idler mount and put in a small bolt or sheet metal screw so the idle mount can't flop over"does this screw run into the bike frame?Thanks,Ron

Yes I did. I tried to fit the chain the first time without the tensioner but I could not do it until the chain stretched some. It seems to not be stretching much now after about 2 tanks or so.

To me it looks like if the chain comes loose or if the engine locks up it could become very tight on the bottom putting large pressure on the tensioner causing it to spin or even bend into the spokes.

When I pop the clutch to start it also puts pressure on it.

Bad enough having a chain come loose. A loose chain and a tensioner bent into the spokes I can do without.

motorbiker

Yes Ron I drill onto the frame and either tap or you can drill right through and run a bolt all the way through. You don't need a big bolt a 6-32 or an 8-32 will work just something to keep the tenchioner from rotating in to the spokes. Changing out the low grade bolts is also a good idea. You can also drill the tenchioner and use a # 6 sheet metal screw. What all this does is pin the tenchioner form rotating into the spokes. I have a fix for the bolt that holds the idler form coming loose as well but a guy will need a lathe to do the mod. if you want this mod I can do it. For a small fee. I'll post the info soon and pictures so all can see. sound good?

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norms-iron-works.tripod.com

Yesh, yesh it does.

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If it ain't broke, and you mess with it long enough, it will be.