HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

jimmym

JB Weld or Replace Crankcase Cover

12 posts in this topic

I just noticed a very small oil leak coming from under the left side crankcase cover, maybe 1 drop every 3 or 4 minutes. Looking closer it looks like I hit something, or something very hard popped up and hit me. I jumped online and was prepared to order a new cover, but then wondered if such a small puncture could be welded or even JB welded?  

 

I have always replaced covers when cracked, but have heard such minor injuries can be easily repaired with JB weld or other such products. This bike has approx. 80 on hours on her, would it be a stupid risk to JB weld rather than replace the entire crankcase cover?

 

IMG_20160306_223559.jpg
 
IMG_20160306_223607.jpg

Share this post


Link to post
Share on other sites

I've been on rides where a buddy cracked his side case. We used that steel putty stuff (JB Weld in stick form) and it worked great. That being said, do you really want to be worrying about it your whole ride?

Share this post


Link to post
Share on other sites

Your case can be repaired with JB weld. However it is weak in that area. You might also check on EBay for a reasonable replacement.

Share this post


Link to post
Share on other sites

I rode with a much more badly damaged left side cover for most of a year until I found a reasonably priced replacement.  Prep the surface by cleaning the paint off, rough up the metal surface well, and clean it oil free, then JB or other good two part epoxy.

Share this post


Link to post
Share on other sites

Thanks for the feedback. I decided to replace the cover, which is obviously the better move. And the cost wasn't too bad @ $130, including gasket.

Anyway, I seem to remember crawling over some large rocks that may have inflicted this harm to my baby. The stock skid plate took most of the damage, but it's not wide enough to protect this section of the crankcase cover that hangs out. Any suggestions on a larger plate that will properly protect the entire case?

Share this post


Link to post
Share on other sites

Has anybody found a skid plate that protects he side cover from being cracked by the shifter? It's happened a few times so unless I stop flipping the bike....

Share this post


Link to post
Share on other sites

Has anybody found a skid plate that protects he side cover from being cracked by the shifter? It's happened a few times so unless I stop flipping the bike....

 

 

Maybe just learn to fall to the right.  :excuseme:

2 people like this

Share this post


Link to post
Share on other sites

Has anybody found a skid plate that protects he side cover from being cracked by the shifter? It's happened a few times so unless I stop flipping the bike....

The gap between the gear lever and generator cover is usually too small to allow a cover or guard to fit between. The solution is a billet generator cover from someone like Hinson or GYTR http://www.ebay.co.uk/itm/GYTR-BILLET-IGNITION-CASE-COVER-YZ450F-2014-/391466713989?hash=item5b253c0385:g:eEsAAOSwPhdVSd-D

Share this post


Link to post
Share on other sites

You should file off the sharp corner on the shift lever facing the motor.  Round edges shouldn't punch through that easily.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now