broken sprocket bolts
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Stage II
Joined: May 2007
Posts: 2
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broken sprocket bolts
I own a 2005 ,95 inch fxdwgi, power commander ,six speed 16 inch fat boy chrome front wheel.Also the rear wheel is a solid chrome wheel. yesterday leaving town going through a corner i rolled on the throttle ,,, and,,,,, Bang !!!!!!!! All 5 chrome bolts holding my sprocket to the wheel snapped!!!!! I rolled off the road safely nothing locked up and i called a friend to trailer me to a shop. why did this happen? A friend a few weeks ago said that my rear wheel was not tracking straight and adjusted it for me .. ????? Could he have messed up? They were chrome bolts red locktited on I did myself 18 months ago So they did not back out but snapped with about 7 threads left on the bolts[8D]WHY ???
Stellar HDF Member
Joined: Feb 2006
Posts: 3,035
Likes: 17
From: Houston Texas
RE: broken sprocket bolts
I agree with that. Perhaps they were not even grade 5. Chrome covers lots of sins. He needs to get strength 8 bolts for that application. Grade 8 will have the tick marks on the head indicating that they are grade 8's......pg
Grand HDF Member
Joined: Apr 2005
Posts: 4,022
Likes: 3
From: Hudson Valley- NY
RE: broken sprocket bolts
You didn't say that they were new bolts, just chrome. Were they new or reused from a previous install? HD doesn't recommend reusing any bolts on a belt pulley or rotor. Sounds like they may not have been the proper grade though. Interesting they'd all snap at the same time.
Stellar HDF Member
Joined: Feb 2006
Posts: 3,035
Likes: 17
From: Houston Texas
RE: broken sprocket bolts
ORIGINAL: soup48
Sometimes the harder the bolt that will makeit snap. The softer the bolt could make it bend before itwill break or stretch the bolt.
Sometimes the harder the bolt that will makeit snap. The softer the bolt could make it bend before itwill break or stretch the bolt.
Well I find that I totally disagree with what you say there.
Grade 8 bolts are made for one single purpose........and that is to not break.
You must think a grade 8 bolt which is hard, as well as tough, is brittle. In fact quite the opposite is true.
What likely happened was the rider bought some chrome aftermarket bolts that were not the proper grade and they broke. Failure of all 5 further indicates that the grade was most likely a standard carbon steel bolt set, which decided it had had enough and let go........pg
Road Warrior
Joined: May 2006
Posts: 1,342
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RE: broken sprocket bolts
had the same problem about 2 months ago.had 3 break clean and 2 bend where they were cracked almostall the way through. put up a post about it telling everyone to check their bolts too. thought it was cause i abuse the bike pretty bad ie burnouts and wheelies but several other people had some cracked and/or loose bolts also. reinstalled new grade 8's and locktited. check them about every other week now.
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