yamaha xt600E 2002 front sprocket bolt issue
 

hello :welcome:
i have a Yamaha XT600E 2002 air-cool.
due to whatever reason doh the last owner welded by the front sprocket to prevent it from coming out, now i went out of my way to get a new front sprocket with washer and nut to go with it.
i now notice that the end of the bolt to hold the front sprocket was a bit damage on the threading:helpsmilie:.

i'll like to know if anyone now the right exact size die?
so i may re-thread the bolt so i can put my bike to original.:scooter:

i don't want to cut and weld my front sprocket back on every time i want to change it.:thumbdown:
it would be a big help.
any questions don't hesitate to ask.:thumbup1:

hi the problem is the original threads would have been rolled (like all bolts) and not cut with a die ,because a rolled thread is stronger than a cut thread,also the shaft would have had heat treatment,although after the welding who knows now?
Cut vs. Rolled Threads | Fasteners, bolts, screws and more from Atlantic Fasteners
steve

You can post a picture its easy to see how it is, dont sound good to me at all. If threads are damage and its welded, your option is making new threads. Or you can buy new 3YF174020000 DRIVE AXLE SUB-ASSY
EUR 129.03

People do this because the splines are worn, so it sounds like a new axle is needed. Or, cut the old sprocket of, and weld a new one on to postpone the problem.

With the material used to make the shaft originally there's a good chance where it was welded will be hard or have a lot of hard chunks in the weld that'll destroy a tap quickly . I don't know what alloy used so can't say for sure how it'll be . If the splines were bad , nothing to do but either weld the new sprocket again or split the case and install new shaft . If the motor is in good shape I'd happily just weld the sprocket and get another couple thousand miles on it and repeat if it's still good , granted a hack job but .....

If the thread were rolled it would be possible to tap new threads , I believe 22mm x 1.5mm(or1.25?) is the size . Still would end up half quality threads in the end.

before you go to major surgery, you might want to give a chance to a "thread restoring file", saved my bacon many times

https://www.google.it/search?q=threa...nleUkURzbR5jM:

if you have extra money to spare, this smart product from an israeli company might do the trick,

https://www.nes.co.il/external-thread-repair-tools/

Thoose tools wont repair the worn out splines, which is why the sprocket was welded on in the first place. :)