Eagle, Rocket has said it pretty well as stock they have a grey wire (much like the Yamaha) that has a plug next to the CDI unit (mounted to the frame in front of the left hand radiator when sat on bike) that when connected (plugged into itself) runs the bike in ‘Power’ mode and when disconnected runs the bike in ‘traction’ mode.
The wire sometimes falls down under the fuel tank so he may need to take that off to get to it. You can easily run a handlebar switch to change between the two settings on the fly. A switch can be purchased from any reasonable bike shop. Apparently the Gas Gas ones are nice and small.
The 2 settings aren’t supposed to be wildly different on the 4 stroke bikes so tell your mate he’s not missing on much. By default they are supposed to be set in power mode (i.e., plug connected).
Tell your mate we are moving this to the Bullpit and if he wants the info. he has to sign up and read it :laugh:
Hope this helps 