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Old 06-17-2016, 09:53 AM
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Engine Problems 😕 New - Crank Failure?

Hello Everyone; I'm new to the forums and wanted to join for the useful and knowledgeable personnel on these forums usually.

Recently purchased a BMC hardtail (avatar) with 100 CI revtech - 6 speed.

Problem: rode about 60 miles by the lake and was coming home, figured I'd fill up. Stopped and got gas, when I went to start it bogged the starter on compression stroke as it always does, and then free spun. Had nothing after that. After hauling it home and pulling everything off the drive side, the crank free spins - no compression. I did notice the compensator nut was loose. Any opinions, key way, broke crank? How are these cranks? Looking to get this fixed STAT!

Any reputable engine builders around Southwest Missouri?
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Old 06-26-2016, 08:40 PM
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Are you apart all the way down to the sprocket shaft? No Compensator or dive pulley on the shaft and it free spins = Not good
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Old 06-27-2016, 09:49 AM
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you already have a thread running on this and have had several answers to ya question ........

if ya sprocket shaft is turning but the flywheels are not moving you will need to rebuild the motor from the crank up.

RevTec are not known for their quality,....... known more for their lack of quality but i do believe one thing is that for repairs , RevTec parts must be used as they didn't use Harley copy/clone parts but their own, which limits you in what you can use and whats available.... not 100% sure on this as i have avoided using anything from them
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