2002 FALCON
Registered
Mine is doing now in pretty much ANY gear.Three or so bikes ago, I had a Suzuki.
Thing looked and ran fine. Could ride for hours without any problems.
But, when in 2nd gear, if I gave it a snap wot, it would pull hard, then do a micro slip thing, then keep pulling.
Only in second gear and only under wot. If I wound it out gradually, no issues at all.
Turned out to be a 2nd gear problem in the box. This after going through every conceivable thing that may be the cause. Not saying yours is, just my experience.