Random ramblings…
Adding another class like this won’t necessarily bring in more riders. There may be some who would ride an extra class.
Pre 75 4 stroke seems to work okay but the 4 stoke models for pre 85 are evolutionary quite different.
HL’s are a 76 design, some are upspecced to Evo but would be out of place in Pre 85.
84 KTM’s and Husky’s would dominate against XR’s & DR’s etc.
While some guys can ride anything fast there is a trend that many racers are only interested in the latest and most competitive model for a class.
Most open class 4 strokes are competitive in their Era.
There wouldn’t be enough 250 4 strokes to warrant a class
4 strokes racing MX in the 80’s,…
Kel Amberson is one that springs to mind, he would be at many events and if I remember correctly he was on a Sonic and maybe later a KTM??
I raced my TT350 at Newry in 88 as did a mate, that doesn’t really count though as it was a ‘one off’ just for the hell of it. (and quite a pathetic attempt to)
Club days often involved a 4 stroke class and/or a trailbike class.
The trail bike class was more common at DVMCC MX events and I often rode in them.
I won my first trophy (3rd) on a KLX at a club Enduro against 250 2 strokes.
If you want to start a new class then it should start at club events, if there is enough interest then it could be justified to run it as a National event. Can’t really see that happening.
I will eventually get around to building my own HL, a 4 stroke class won’t influence me to build it faster. I will be just as fast on it as anything else