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Old 07-31-2011, 04:23 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: Now I own *two* DAX GT50r motors........

Red Loctite worked for a few rides, but I took it out for a speedy ride yesterday & sure enough, one of the headbolts loosened up & I could hear that compression escaping sound (It helps that my engine is in front of me to easily keep on eye & ear on her).
I decided to remove the headbolt & head on down to my local Lowes hardware store.
The size of the bolt is M6 X 1.0 X 80mm. I didnt find anything @ Lowes but found 90mm bolts @ McMaster Carr & ordered a bag of 10.
I'm hoping the extra centimeter length grabs more thread in the engine & doesnt loosen as easily.
The engine revs so high that bolts will vibrate loose. I guess its inevitable & probably the cause of many of this type engine failures when gone unchecked. I want to order a 2nd engine just like this one I got, but want to solve the 'Mystery of the Vibrating Loose Headbolts' 1st...
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