Is this cylinder trash

[MotherGoose]

i found this cylinder in a box of parts given to me. I don’t see any transfer but it has a small nick and groove. Would this be ok if I smoothed out the nick?

 

[MotherGoose]

Also this is the piston with it. Does it look like these are the wrong size rings to you?

 

[Mad Professor]

Thickness of rings look O.K. you can check that with a feeler gauge in piston grooves. As they are busted no way to tell about diameter.

You should be able to chamfer in the nick in cylinder. Make sure plating near it is not bulged out. The groove will cost a little compression but if it's free of burrs not too bad of defect.

What are these parts from? Any idea what started jumping around inside first?

 

[MotherGoose]

It’s a 75cc 372 cylinder. I know nothing other then what I can see. Bonus is it seems to have a mild porting on exhaust and intake. The groove thankfully seems to be barely noticeable running fingers over it so hopefully compression won’t be lowered to much

 

[redoakman]

rings are fine just look like that after the piston got caught on the side . i wouldnt reuse any of it . oem ones are cheap now.

 

[r black]

I always try and reuse and would on this one also............ however new cost... is down.... see @fordf150 and or @spike60 the 71cc are around $150 and the 75cc around $ 195 new oem

 

[MotherGoose]

Are those prices for piston and cylinder? I just have a hard time tossing a cylinder if it’s usable I dunno tho I’m still new to this game

 

[Jacob J.]

If you need just a piston, the 75cc piston runs about $92-96. The aftermarket hasn't produced the 75cc piston yet.

 

[r black]

Are those prices for piston and cylinder? I just have a hard time tossing a cylinder if it’s usable I dunno tho I’m still new to this game

yes the whole kit, cylinder, piston , rings, bearing NO gaskets..................

 

[cus_deluxe]

With a little light sanding to make sure theres no high spots id run the piss out of it. I just put together a 281 with an 1/8 x 1/8 groove from the top of the ex port all the way up near tdc, and it has plenty of compression and runs fine, groove is mostly full of carbon so it ran a good long time after it was initially damaged.