Tell him to try disconecting the grey wire under the tank in the harness. It changes the ignition mapping and makes the bike hit much softer. Won't pull your arms out quite as far.... You can also buy a bar mounted switch so you can use either setting. Tell him to look on amazon or ebay and not buy the KTM swicth which is 80 bucks. I think I have the Slavens which was about 20 and does the same thing
The guy he bought it from installed the ignition from a SX 250 and has a SX250 head on it. Not sure what all that does but it has pretty smooth power. It may not even have the option to change the mapping. I'll ask him.