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Old 11-03-2009, 02:24 AM
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Egor Egor is offline
Motorized Bicycle Elite Member
Join Date: Jan 2008
Location: Hurricane Utah
Posts: 714
Default Re: Another Build from an abandon in the park bike

Well I put the crank from the engine that was leaking air into the crankcase up on centers today, Wow is this thing out of round. The extra weights that are bolted on come up .037" out. Without the weights on the crank itself it .013" out, but one thing that is a problem is that the extra weights are machined so that there is about .40 thou of clearance, so that you can move the weight around. How in the world am I going to get it to run true! Another thing is that the cut outs in the back of the weights are not even so that it will be off to one side if I were to run it this way, I have been running the mill on that to get it in shape. I am convinced that the best crank are the one piece ones. I got my first engine from Kings and it has a one piece crank, vibrates too much but at least it could be balanced. Ill keep you posted as to what I come up with, but this thing is a mess. I wonder what crank the Spooky engines have? Have fun, Dave
Attached Images
File Type: jpg Dial indicator.jpg (570.2 KB, 25 views)
File Type: jpg No Weights.jpg (580.5 KB, 22 views)
Its just a job. (Link) My shop is in the lower R/H corner.

Last edited by Egor; 11-04-2009 at 06:47 PM.
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