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Author Topic: Hole in the case  (Read 1511 times)

Offline Steve Jagger

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Hole in the case
« on: June 22, 2016, 10:06:04 am »
Hello again quadracers. So I decided to clean the bike up a bit, and looked at the repair job on the case that someone did, and here is what I found.


So I decided to touch it and it broke more with my fingernail! So I took the repair off with a screwdriver.


Now my question is how to fix this and do I have to split the case?

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Offline Rainman56

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Re: Hole in the case
« Reply #1 on: June 22, 2016, 12:49:04 pm »
Can't view it as I not on facebook
Can,t fix stupid.:)

Offline AZ-ZILLA

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Re: Hole in the case
« Reply #2 on: June 22, 2016, 01:32:47 pm »
Rainman,
That's odd that you couldn't open the pics.  I'm not on FB, and I could open/download them.

Ugly hole.....

Can't see any way of welding over without splitting case so not to damage surrounding bearings/seals, let alone getting clean enough for a good weld.
Globbing over epoxy will only get the same bad results.......

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Offline Steve Jagger

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Re: Hole in the case
« Reply #3 on: June 22, 2016, 02:04:47 pm »
Huh, I made the pictures work through Imageshack, weird. Anyways its a hole about as big as a dime or penny. Was there a case saver bolt hole there at one point I wonder.

Ok, yeah thats what I figured, guess I better build a garage, lol.
 Since I dont really know or have the means to weld aluminum, you guys think after I remove the case half, I could use that alumaweld solder looking stuff? Not real sure how hot Im allowed to get the case without distorting it.

Offline MotorGeek - Jerry Hall

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Re: Hole in the case
« Reply #4 on: June 22, 2016, 03:17:00 pm »
Welding the hole closed is an easy welding job.  Welding the case saver post with the bolt hole back in place is a lot more involved. 

I have welded those holes closed on a lot of the LTs without splitting the cases.

Degrease the area and then use a carbide burr to clean the area for about a 1/2" around the hole. 

Do not spray the area with brake cleaner or contact cleaner after grinding!!!!!!!!!!!!!!

Find someone in your area that is a good TIG welder.  Do not use the alumaweld, it will only make it more difficult to TIG weld when you finally decide to fix it correctly.  I looks like about a $30.00 welding job.


Offline Steve Jagger

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Re: Hole in the case
« Reply #5 on: June 22, 2016, 03:31:39 pm »
Holy helll i was about to split apart a good running motor. I can ask the guy who welded the swingarm back into working order, Im sure there will be some metal going inside of it, if its still on,  should i just dump some motor oil in the hole to help clean it after the grinding? I dont wanna waste precious type f atf, which is hard to find locally in northeast pennsylvania.

Offline Dutch_Rutter

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Re: Hole in the case
« Reply #6 on: June 22, 2016, 03:59:50 pm »
I dont think you would want to do that. Putting oil or anything onto the metal after its cleaned would interfere with the weld (at least that is how I see it) I may be wrong. I would go with whatever motorgeek (aka Jerry) says.

After its cleaned you can always drain and fill the case to remove as much small pieces of the aluminum as possible. but then again the small bits of aluminum probably would not do much if any harm to the steel gearing inside of the motor, better to not risk it though. 
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Offline Skeans1

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Re: Hole in the case
« Reply #7 on: June 22, 2016, 05:11:06 pm »
Holy helll i was about to split apart a good running motor. I can ask the guy who welded the swingarm back into working order, Im sure there will be some metal going inside of it, if its still on,  should i just dump some motor oil in the hole to help clean it after the grinding? I dont wanna waste precious type f atf, which is hard to find locally in northeast pennsylvania.
Drain the oil the biggest thing with tig welding is getting everything as clean as possible especially with stuff that has had oil soaked castings for almost 30 years.

Offline Steve Jagger

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Re: Hole in the case
« Reply #8 on: June 22, 2016, 07:07:51 pm »
Im gonna give it a go, thanks everyone, i am showing this thread to my aluminum welder, so he does it right. Also because guys like me look up stuff on the internet all the time looking for answers. Hopin This helps.

Offline Knock10090

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Re: Hole in the case
« Reply #9 on: June 22, 2016, 08:43:51 pm »
Go for it.. I picked up a Blaster for my wife for $100 due to a blown out crankcase... I tig welded it and it came out great!  CLEAN CLEAN CLEAN.. . flush with copious amounts of acetone.. clean some more all with stainless brushes.... get a good root pass, set balance for cleaning and let the puddle dwell to cook some of the crap off..   you can do it!

Offline TommyVegas

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Re: Hole in the case
« Reply #10 on: April 17, 2017, 02:47:26 am »
I realize this post is old as hell but I'm going to reply anyways. I had a similar hole that I took a half dollar and some JB Weld to and patched it. I know it's red neck as it gets but it held and didnt leak. Clean the area best you can, not getting any dirt in the case and let the JB set up some before putting it on the half dollar and on you case because it tends to want to run and you want to use as much as you can on the exterior ( outside ) of the hole as you can not letting it run inside or down the side of the case. Let it set up some!..... hope this finds someone and helps.

use this method at your own risk...results vary depending on size of hole and your head......

 

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