Thread: Bmp rip
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Old 02-21-2011, 05:53 PM
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lowracer lowracer is offline
Motorized Bicycle Elite Member
Join Date: Oct 2008
Location: Charleston, SC
Posts: 1,319
Default Re: Bmp rip

The BMP noise you are referring to (vibration) can be cured by not using the long thru bolt, & using 2 shorter 3/8" bolts w/nylock nuts & washers to attach each side of the channel to the U mount. It worked for me & the annoying (loud) vibration noise is gone.
Also you sould take any play out of the drum shaft going thru the bearings. I added one washer & it allow the phillips end screw to act like a tensioner. I tighten it just until the shaft becomes stiff to spin, then back it off slightly & then set the collar allen set screw. The shaft spins nice and free without play (which also can causes vibration noise).
I just ordered some spare rollers & extra bearings from Jim @ BMP while he still has them. He has a few eBay listings for the rollers.
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