View Single Post
Old 09-22-2010, 01:57 PM
mapbike's Avatar
mapbike mapbike is offline
Motorized Bicycle Elite Member
Join Date: Mar 2010
Location: Central Texas
Posts: 5,379
Default Re: Snapped Rear Mounting Studs (3rd time!)

Originally Posted by kicking View Post
I could not find the thread on boring out an hole to an little larger bolt size ; then filling the hole with hard material such as marine tex which I have used or . I may try the alumaweld stuff too. here is one good thread and I am sure there are more .
I am having the same problem , I have my motor on the bench right now and "will fix it :
Go and buy you a 1/4 - 20TPI Bottoming Tap and a stick of 1/4"X20 all Thread rod or just get some grade #5 or #8 Bolts that are the correct length and run the 1/4"-20 Tap into the existing 6mm holes after putting some thin oil like 3 in one oil or something simular so that the tap will not seize while retapping the hole out from the 6mm to the 1/4, just remember to run it in (the tap) 2-3 threads in depth at a time and then back out and then back in again repeating this proccess until the tap bottoms out in the hole, unscrew tap out of hole and then spray the hole out with either brake cleaner or carb. cleaner to get the alum. shavings out and then you are ready for your new 1/4" studs or bolt which ever you choose. very simple proccess use a small cresent wrench to turn tap if you dont have a tap wrench and make sure it is running straight into the hole.

Last edited by mapbike; 09-22-2010 at 02:00 PM.
Reply With Quote