I dunno. Small engine warehouse won't give me a quote, only seems to ship to USA. I'll do without it for now anyway until I get another bike for a project, have the gx31 on the way now
Tis grand, my engine buying spree is over now, getting a GX100 (not for a bike) and that gx31. I wanted to build a bike with a nylon roller to push down on a belt operated by a lever instead of the centrifugal clutch, which is why i was looking for the gxh50 but I'll leave that for another time. Has anyone tried the nylon roller clutch setup before? It works great on my tiller and I also used a lawnmower that this system for a self-drive
The movable tensioner's been used over and over again, down the years, it's less durable perhaps than a proper clutch, but it serves well enough, from what I can see.
There's not much clout going through the belt and you won't be doing high mileage, so it will probably be ok. You can always carry a spare belt if you think you'll need it.