Replace/Repair/Adjust Chain

What kind of bicycle motor kit do you have?

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

Yes, I too would like to know

I would guess that you have alighment issues. the width of the chain shouldn't matter if your sproocket and motor sprocket are alighned. Some of the kits come stock with a 415 which is even wider, this is what I use. I think I have one more 415 left then I will switch to the 41...Kelly

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I think you have alignment issues too.

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

Adjusting the chain

You want to have at least 1/2-3/4 inch of slack in your chain. To tight is just as bad as too loose.

With a tape measure...measure from the bottom chain stays to the top of the chain (the drive part). Alway's measure from the same place...I use my chain tensioner as a guide (about a inch and half away from it) Measure in the middle between the sprocket's.

Measure the chain first


Now with your finger pull up on the top chain (drive part) until all slack is gone...As you can see I have about a inch of slack...too much




Use your tensioner to adjust..If you do not have enough adjustment on your tensioner...moving it back (towards rear sprocket) should give you a little more adjustment. If you can't do that...you may have to remove a link. If you remove a link, you may also need to move the tensioner back towards the engine. BE SURE!! removing a link will not make your chain too short!!

Here it is adjusted to 3/4 inch...The measurements are not exact in the pic's...it was too dificult to hold camera tape measure and chain all at the same time. But it should give you a good ideal how to go about it.





How to remove link with bench grinder coming soon

I want to chime in and say rotate your rear wheel and find where the chain its at its tightest and use that point to set the slack in your chain. I run mine more on the loose side than tight.
Norman

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#415 Chain.....

Pitch: 1/2

Roller Diameter: .306

Between Inner Plates: 3/16

Pin Diameter: .141


#41 Chain....

Pitch: 1/2

Roller Diameter: .306

Between Inner Plates: 1/4

Pin Diameter: .141

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