One should consider a engine in this order:

1. Reliability, relibality, reliability....ohh did I miss one...Reliability....
2.What you want out of the engine....
3. Price

IMHE....
I have had RTR's and RB C6, OS ect)

I Would say that you can always Re-size the sleeve...seems to work well...
In the end, you usually get what you pay for....

Pay more, you get Reliability, power, Fuel milage, and Longevity....

Sure there have been FEW flops....that cost lots, and give you headaches....


I have a C6 with a extra set of pistion/con-rod/sleve NIB......
that I will place in my buggy when my other Black magic gives up....

Keep your filter clean and dry.....Don't suck up dirt.
Dust particles that make it through a dirty or WET filter, messes things up....big time...