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Old 10-10-2013, 08:18 PM
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2door 2door is offline
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Join Date: Sep 2008
Location: Littleton, Colorado
Posts: 16,222
Default Re: New Newb Big Time

Original chain length isn't important, Chain tension after installation is. You'll want 1/2" to 3/4" slack. As I said above, if your chain is too short you'll need to replace it with a new chain or add links to make it longer. To add links you'll have to know exactly what chain you have. If it is the original kit supplied #415, you'll need #415 links.
My advice would be to replace the chain with an industrial quality #41 chain and shorten it to give you the recommended slack.
Are you using a chain tensioner? There are many Cranbrook builds here. Use the search feature, keyword 'Cranbrook' to see what others have done to motorize this particular bike.

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