Planet Minis

dayj1 · 09-10-2006, 10:10 PM

I was cleaning up my engine case today to prep it for painting and what I first thought to be some casting slag looks to be a crack. Before tearing it down, I ran the motor long enough to verify that it still shifted through the gears ok and I didn't notice any oil leaking from the area with the crack. It's just behind the counter sprocket shaft in the left side case and it's hard to see the whole thing because of the camera flash. But it runs all the way across the case to the center where the case halves meet.

I've got another engine, but the tranny shifts really rough. So my only option short of another motor is to move the internals from the motor in the picture to the cases with the bad tranny or find another bottom end.

I'm looking for opinions. Would you guys run it with the crack or start a major teardown?

/dayj1

reynolds_brad · 09-10-2006, 10:30 PM

JB Weld it and ride the piss out of it. IF it gets worse replace it. Most likely though it will be fine.

slayer66 · 09-11-2006, 12:07 AM

looks like casting flash too me

eichkay · 09-11-2006, 01:34 AM

My mate had a nice crack behind his kickstart leaver... it leaked when it got hot... He just filled it up with some gearbox gasket silicon stuff and never looked back.. Fix or replace if it starts to spread and open up otherwise id just keep on riding. IMO

nizmo2005 · 09-11-2006, 05:37 AM

If no oil comes out...don't worry about it..throw a lil JB weld on it and call her a day!

dayj1 · 09-11-2006, 10:56 AM

It looks like the votes are in. I'll button everything up as is and see how it goes. Thanks for the feedback.

/dayj1

BILLET · 09-11-2006, 11:11 AM

Its a cold lap in the casting, part of the material cooled down and then some hotter material seeped thru after while they were still pouring the mold. It shouldnt be a problem.

Motarded · 09-11-2006, 11:20 AM

That isnt a crack

birddogg · 09-11-2006, 07:48 PM

I had a spot on my ATC70 cases that looked like that. I sanded it out to make sure it wasn't a crack. It disappeared after a while.

davez · 09-11-2006, 10:54 PM

Weld it, if it is a crack

09-10-2006, 10:10 PM	#1 (permalink)
dayj1 1st Gear Member Join Date: Jun 2006 Location: Athens, Alabama Posts: 183	Cracked Case :( I was cleaning up my engine case today to prep it for painting and what I first thought to be some casting slag looks to be a crack. Before tearing it down, I ran the motor long enough to verify that it still shifted through the gears ok and I didn't notice any oil leaking from the area with the crack. It's just behind the counter sprocket shaft in the left side case and it's hard to see the whole thing because of the camera flash. But it runs all the way across the case to the center where the case halves meet. I've got another engine, but the tranny shifts really rough. So my only option short of another motor is to move the internals from the motor in the picture to the cases with the bad tranny or find another bottom end. I'm looking for opinions. Would you guys run it with the crack or start a major teardown? /dayj1

09-10-2006, 10:30 PM	#2 (permalink)
reynolds_brad Advertiser Join Date: Dec 2003 Location: San Francisco, CA Posts: 2,719	JB Weld it and ride the piss out of it. IF it gets worse replace it. Most likely though it will be fine.

09-11-2006, 12:07 AM	#3 (permalink)
slayer66 2nd Gear Member Join Date: Aug 2006 Posts: 684	looks like casting flash too me

09-11-2006, 01:34 AM	#4 (permalink)
eichkay 2nd Gear Member Join Date: Jul 2005 Location: Perth, Australia Posts: 507	My mate had a nice crack behind his kickstart leaver... it leaked when it got hot... He just filled it up with some gearbox gasket silicon stuff and never looked back.. Fix or replace if it starts to spread and open up otherwise id just keep on riding. IMO

09-11-2006, 05:37 AM	#5 (permalink)
nizmo2005 1st Gear Member Join Date: Jan 2006 Location: SW PA Posts: 206	If no oil comes out...don't worry about it..throw a lil JB weld on it and call her a day!

09-11-2006, 10:56 AM	#6 (permalink)
dayj1 1st Gear Member Join Date: Jun 2006 Location: Athens, Alabama Posts: 183	It looks like the votes are in. I'll button everything up as is and see how it goes. Thanks for the feedback. /dayj1

09-11-2006, 11:11 AM	#7 (permalink)
BILLET 2nd Gear Member Join Date: Oct 2004 Location: North Tustin CA Posts: 384 My Mood:	Its a cold lap in the casting, part of the material cooled down and then some hotter material seeped thru after while they were still pouring the mold. It shouldnt be a problem.

09-11-2006, 11:20 AM	#8 (permalink)
Motarded 3rd Gear Member Join Date: Aug 2004 Location: RIVERCIDE SO CAL 951 Posts: 4,972	That isnt a crack

09-11-2006, 07:48 PM	#9 (permalink)
birddogg 2nd Gear Member Join Date: Sep 2005 Location: Northern Cambria, Pa Posts: 597 My Mood:	I had a spot on my ATC70 cases that looked like that. I sanded it out to make sure it wasn't a crack. It disappeared after a while.

09-11-2006, 10:54 PM	#10 (permalink)
davez 2nd Gear Member Join Date: Dec 2005 Posts: 769	Weld it, if it is a crack

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