Replacing Cracked Left Case

[CR500PHIL]

I read the forums on splitting cases. My question is how difficult is it to replace a cracked stator side case? I mean just to tip the motor on it side and replace the stator side case without removing the transmission etc. Is this possible? Is there a way to remove the stator without modifying timing? Pitfalls? Special tools? I know flywheel puller. When you remove the stator side case will everything inside fall together or stay in place so you can just fit the new case on?

[dannygraves]

you can remove that side without taking the trans all apart. just remove the jug and sprocket and flywheel, remove all bolts and hookup balancer puller to split.
Me personally, I like to repair the cases so as not to have to spend $$$ on a new case. where is the crack?

[HrcRacing]

Be sure to look for washers that may have stuck to the left side case bearings. Other than that, the transmission gears should stay basically intact.

Best of luck.

[south central hoon]

you can remove that side without taking the trans all apart. just remove the jug and sprocket and flywheel, remove all bolts and hookup balancer puller to split.
Me personally, I like to repair the cases so as not to have to spend $$$ on a new case. where is the crack?

JB baby.

[CR500PHIL]

you can remove that side without taking the trans all apart. just remove the jug and sprocket and flywheel, remove all bolts and hookup balancer puller to split.
Me personally, I like to repair the cases so as not to have to spend $$$ on a new case. where is the crack?

The crack is right in front on the sprocket - it has been repaired with JB Weld and held for a long time. Perhaps I just need to remove the JB Weld and redo it. I notice a small weep in it now that the previous owner plugged with silicone. This is the reason I got the motor cheap - all else is great.

[dannygraves]

dude, I'd just fix it and keep riding. watch you'll replace the case for $$$ and lose a chain and be in the same boat again
I personally actually weld up my cases for repaid, but that spot might be easier to JB.
I have 2 motors where some piston frags damaged the cases and I welded them up just fine

[CR500PHIL]

dude, I'd just fix it and keep riding. watch you'll replace the case for $$$ and lose a chain and be in the same boat again
I personally actually weld up my cases for repaid, but that spot might be easier to JB.
I have 2 motors where some piston frags damaged the cases and I welded them up just fine

With my luck you are probably correct - cheaper and easier too. Besides I want to spend money on the rest of the conversion at this point.

[dannygraves]

yup
I always forget when I'm doign a conversion about the little things that nickel and dime you like chain, sprockets, bars, throttle tube, levers, tires/tubes, etc.etc.

[CR500PHIL]

yup
I always forget when I'm doign a conversion about the little things that nickel and dime you like chain, sprockets, bars, throttle tube, levers, tires/tubes, etc.etc.

Before I ever got a motor and started and I started collecting things of that nature - Pro Tapers, throttle, new pegs, Renthal Gold oring etc but I am sure the cost will add up when the bike comes together.

[nmdesertrider]

the cases are pretty good quality casting material and weld up really easily.

[kball1313]

Welding is my first choice, as the case material is of decent quality. For a tougher spot like that where the failure isn't a big chunk i'd use *belzona.*
I can't tell you how good this stuff is and once it's cured, is harder than steel. I've seen it used in the most extreme applications with no problems, ie-3500hp 16cyl. diesel engine blocks. Anything from cracked water jackets to pitted cyl. liner registers. I've used it personally and this stuff makes JB look like silly putty. I let it cure partially, then work the area to roughly how you want it. Once set up do the final grinding/contouring.

http://www.belzona.com/prod1k.aspx