LewieBike
Well-Known Member
I had a morning test of my 48cc HT engine a couple days back, we have a 400' elevation hill with a good 3/4 mile long climb that I estimate is roughly 4 percent.
First time I've ridden the bike since I rejetted it's PW50 carb. I was able to maintain about 22 mph with the throttle just under WOT. Engine is running strongly, I have the stock gearing on a 26"x1.9" mtb tire/wheel.
Note I weigh just under 158# and the bike is about 47# so this is lighter than your typical HT bike and rider. I was noticing that increasing to WOT didn't really gain any speed, but that it was knuckling under and just pulling me uphill at a clip I didn't expect.
This is the same hill my 30 cc friction drive will buzz up at about 14 mph and my 125 cc pitbike engined Honda does at about 38 mph. So splitting the difference I'm going to assume that this engine is probably not going to gain much from further work.
First time I've ridden the bike since I rejetted it's PW50 carb. I was able to maintain about 22 mph with the throttle just under WOT. Engine is running strongly, I have the stock gearing on a 26"x1.9" mtb tire/wheel.
Note I weigh just under 158# and the bike is about 47# so this is lighter than your typical HT bike and rider. I was noticing that increasing to WOT didn't really gain any speed, but that it was knuckling under and just pulling me uphill at a clip I didn't expect.
This is the same hill my 30 cc friction drive will buzz up at about 14 mph and my 125 cc pitbike engined Honda does at about 38 mph. So splitting the difference I'm going to assume that this engine is probably not going to gain much from further work.