I need to replace the piston & sleeve in my O.S. RZ99 .21 engine. I was wondering what hop ups I could do to the motor to make it better? I there someone who I could send the motor to modify it?
Last but not least, will it be worth it?

Thanks for the feedback.

There is no hop up can can eleminate the need for a new piston/sleeve. Theres simply no way around it.

You can get your sleeve "pinched". Thats when they actually sorta shrink it to fit. After that your motor has good compression again and its like new.

For $25, you cant go wrong with that!!
ram

I know that I have to change the piston and sleeve, I wanted to know while it's apart is there any extra things I could do to make it better.

BUGGIES_R_US:

Where can you get your sleeve "pinched"?

Mike D.