Go to www.go-racing.co.nz and click on "Tech Tips" from the homepage menu.
This will take you to run-in, tuning and maintenance tips for the GO motors.

Being an older motor, check and see what sort of low speed needle you have fitted - long or short, as this will make a big difference to the tuning.

Open the throttle slide fully. If the lsn has come out of the receiver jet on the right hand side of the throat, you have the short needle. If the tip of the lsn is still in the receiver jet with the slide fully open, then you have the long needle.
Short needle will tune like any other motor, but the long needle you will need to follow the instructions on the web site (especially regarding the high speed needle settings).
Any problems send me a PM or email me at [email protected]