Burnt up a Piston and Rings

[Blue Bowtie]

Well, I burnt up a piston and rings on my 02 Blaster. Melted some of the ring to the cylinder.
Am I gonna be ok if I just run a hone through the cylinder to clean it up? It's still stock bore and I'd rather not have to bore it out right now, I just want to ride the damn thing.

Also the piston that was in there said ART on one side and MADE IN JAPAN on the other side, is this the stock piston?

Thanks
Austin

 

[little3mil]

Well, I burnt up a piston and rings on my 02 Blaster. Melted some of the ring to the cylinder.
Am I gonna be ok if I just run a hone through the cylinder to clean it up? It's still stock bore and I'd rather not have to bore it out right now, I just want to ride the damn thing.

Also the piston that was in there said ART on one side and MADE IN JAPAN on the other side, is this the stock piston?

Thanks
Austin

leak test leak test leak.... you prob leaned it out bro. test click the link at the bottom of my sig.

 

[Blue Bowtie]

Ya, it wasn't getting enough oil. I don't need to do a leak down test, as I already have the head and jug pulled off.

 

[sicivicdude]

Are you sure it was starved for oil?

All 2 strokes require a maintenance at certain intervals...it could have just been time for the top end to go.

Usually simply cleaning up the stock bore is not sufficient to repair the damage. If you have a hone and bore gauge you can try seeing if the bore is not damaged. You'll need to source some clean muriatic acid (hydrochloric is the technical name), some q-tips, and some clothes you don't really care about. Muriatic acid will eat aluminum quickly but not steel so you can dab some acid on the aluminum inside the bore and it will eat it off but not harm the steel as long as you don't leave it on there too long. Baking soda will neutralize the reaction and then a long hard rinse with water will make sure there's nothing left that can hurt you. Once all of the aluminum is gone from the bore you can see the actual damage done to the cylinder liner. A quick hone and then a bore measurement should tell you if you have to overbore. Now, I can tell you that normally when a piston siezes, it damages the bore around the ports and USUALLY you have to overbore but who knows, you may have gotten lucky.

If you do overbore, don't cheap out, get a good piston kit and then (as holeshotman points out) leak test your engine before firing it back up. If the siezure was caused by a leak, you'll know and save that engine.

 

[hotrodaj_2]

Not sure how to do this but here it goes. someone posted this piston failure guide.Piston Diagnostic Guide It helped me once, maybe it can help you.

 

[brandoz28]

yup, its always a good idea to do a leak test after having it apart

 

[Blue Bowtie]

Well, I just bought the thing a little over a month ago, and the guy said the top end only had about 3 hours on it. Long story short, guy wanted $800, was only able to get it to bust off once, so I ended up giving him $450 for it. I got it home and got it started with a new plug, and rode it a couple times and it started making noise. Anyways, got to looking and noticed the oil line running to the carb, was actually on a vent tube and not on the actual oil port. So that's why I think it wasn't getting oil.

How much does it usually run for it to be bored out? I already planned to get a Wiseco piston kit, and I also plan to get the oil block off kit.

 

[sicivicdude]

There's a guy on ebay who sells a Wiseco piston kit and overbore service for about $170. It should have gaskets when it arrives for simply bolting your top end right back on. The only thing you'd need to do is eliminate your oil injection system, leak check everything up, bolt it all together and begin your break in period.

If you'd like a little more oomph you could opt to send your cylinder to one of the board's engine builders for a little work. They can overbore to the next size, port your top end, and send a piston kit back with it. I don't really recommend this unless you already got the engine running properly with the old top end and are fairly confident your jetting is at least close and that when you get the new top end on it'll go ahead and fire up.

 

[sicivicdude]

double post! haha