Muddy fun.

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Sounds like a candidate for an ORB full mod.......;)
???
Took the motor apart, bearings look OK. I think port casting (flash) came loose and got into the cylinder. Damaged piston and cylinder. Damn made in China! ?
Maybe 2 45cc Motors, front and back ( 4WD ). ?
Not sure what caused it.
 

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Last edited:
???
Took the motor apart, bearings look OK. I think port casting (flash) came loose and got into the cylinder. Damaged piston and cylinder. Damn made in China! ?
Maybe 2 45cc Motors, front and back ( 4WD ). ?
Not sure what caused it.
Looks like maybe the piston ring cought the port? What does the piston ring look like?
 
I think the Rovan engines are just hit and miss. To quote Forrest Gump, it's "like a box of chocolates, you never know what you're gonna get"
 
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