Manco 13hp kart broken jackshaft

[MTopp]

Hey all, happy Thanksgiving. Picked up a manco 13hp kart yesterday that needs some love. Really nice kart if I can get it driving, electric start with lights is cool.

Was hoping y'all could help me out with finding parts for these broken pieces? Looks like they managed to shear the jackshaft at the driven unit and the sprocket on the driven and axle need to be replaced if possible.

Is welding the jackshaft if i cant find one a bad idea?

---------- Post added at 08:12 AM ---------- Previous post was at 08:11 AM ----------

Going to start soaking in PB soon and taking apart to see if the actual clutch or driven need parts/rebuilt also.

 

[JTSpeedDemon]

Do you have a bench vise? That will make your life easier as you try to get that driven unit off.
Don't weld the jackshaft back together, it's a VERY bad idea. It'll be hard to get it to spin true, and landuse once had a problem with a similar method, except it was his axle. Rear wheel snapped right off.
So no, don't weld that jackshaft.

As far as new parts, the usual:
www.ombwarehouse.com
www.bmikarts.com
www.mfgsupply.com
www.gopowersports.com

Take some measurements of your jackshaft and look for it on those sites. It's even possible to get a billet aluminum one!

 

[MTopp]

Do you have a bench vise? That will make your life easier as you try to get that driven unit off.
Don't weld the jackshaft back together, it's a VERY bad idea. It'll be hard to get it to spin true, and landuse once had a problem with a similar method, except it was his axle. Rear wheel snapped right off.
So no, don't weld that jackshaft.

As far as new parts, the usual:
www.ombwarehouse.com


www.bmikarts.com
www.mfgsupply.com
www.gopowersports.com

Take some measurements of your jackshaft and look for it on those sites. It's even possible to get a billet aluminum one!

Thanks for the reply!
Hey yep I got some tools here so I'll watch some youtube and go at it. I did clean up a 30 series few years ago or so.

That's good that the jackshaft should be standard I'm hoping and not some proprietary size that's mainly what I was worried about and yea I figured welding would be bad lol, may just weld to get the broken bit out if needed.

 

[MTopp]

Update: got the shaft out of the driven clutch with a lot of MAP torch and hammering, just need a new spring and buttons probably and a lot of cleanup and buffering. The actual clutch I'm still soaking with PB on the engine shaft, not sure how I'm gonna get that one off without trying a prybar or puller.

---------- Post added at 06:22 PM ---------- Previous post was at 06:19 PM ----------

Also all looks like 5/8" shafts so that's good. The point where it broke was very strange, its tapered down right there then back to 5/8, almost like they pressed two pieces of metal together or its possible the bearing got hung up and wore it down, but the bearing still spins now so...

 

[JTSpeedDemon]

It must've worn it down. Otherwise, how could the bearing have gotten ON there??

 

[MTopp]

It must've worn it down. Otherwise, how could the bearing have gotten ON there??

Yeah, just a very weird way for the metal to snap, but who knows what metal the jackshaft was made of I guess. I'll post again if I get the clutch off and maybe get it moving and post a pic of it