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General Category => Maintenance => Topic started by: Urx on August 02, 2022, 04:41:48 PM

Title: Left fork bottom from 3CV similar to 3XW or whats different?
Post by: Urx on August 02, 2022, 04:41:48 PM
One of the 'brace' mounts on the left fork lower is stripped beyond saving but i have a brand new left hand 3xw lower on the shelf. Before i start stripping and swapping and fiddling...
Anyone know what the significant differences are between the lowers?
Title: Re: Left fork bottom from 3CV similar to 3XW or whats different?
Post by: RPM - Robert on August 03, 2022, 10:23:14 AM
89-95 are the same lowers.
84-87 are the same lowers.

Would it not be easier to heli coil the stripped hole?
Title: Re: Left fork bottom from 3CV similar to 3XW or whats different?
Post by: Urx on August 03, 2022, 05:21:08 PM
Helicoil is definitely an option ...but if the new fork bottom will fit without issue (or much fettling) then that would likely be better.
Never really fully trusted helicoils if there is any stress involved... probably without cause but....personal prejudice i guess.
Title: Re: Left fork bottom from 3CV similar to 3XW or whats different?
Post by: FJmonkey on August 03, 2022, 07:05:27 PM
Helicoils in aluminum are much stronger than the original aluminum.
Title: Re: Left fork bottom from 3CV similar to 3XW or whats different?
Post by: RPM - Robert on August 03, 2022, 08:46:55 PM
+1 on what Monkey said.

Also, that strap is no brace it is there to hold the fender. The thin piece of aluminum flexes Willy nilly as seen by the broken fender tabs. If you want a brace that actually lessens fork flex, you need one of these
Fork Brace (http://www.rpmracingca.com/proddetail.asp?prod=M%2FC%3AForkBrace)
Title: Re: Left fork bottom from 3CV similar to 3XW or whats different?
Post by: FJmonkey on August 03, 2022, 10:48:17 PM
We have covered this a few times. https://www.fjowners.com/index.php?topic=14734.msg149000#msg149000 (https://www.fjowners.com/index.php?topic=14734.msg149000#msg149000)
Title: Re: Left fork bottom from 3CV similar to 3XW or whats different?
Post by: Millietant on August 04, 2022, 04:00:29 PM
I'd go with the helicoil too Doug - you can have it done a lot quicker an easier than swapping fork bottoms  :good2:
Title: Re: Left fork bottom from 3CV similar to 3XW or whats different?
Post by: Urx on August 21, 2022, 05:03:53 PM
Ok so the helicoil set has arrived and ill see if i can get a satisfactory repair done...as a back up plan i also sourced a brand new fork leg (it was surprisingly cheap)
.