Steve Best
Well-Known Member
Ok, so if you bought the 48cc (or the "80"cc) China Girl, you would have had it installed already (generally less than 3 hrs) with a pretty much assured 30mph top speed, which is about as fast as anyone should go on bicycle rims, tires and brakes. A few simple free engine mods and I was doing 40mph. A $15 sprocket change and I broke 50mph which is WAAAYYY TOOOO FAST ON A BICYCLE.
Man, I'm looking at that 1/2" plate and I'm thinking "WOW, what does THAT weigh?" Hope you don't have to stop on a down hill.
So trying to be helpful, The connecting rod will likely part company if you go much over 5500 rpm on the 212. Floating valves are indeed an effective governor. Good advice from Mark up above.
The China Girl does 6-7000 rpm stock and can be made to run up to 10,000. Mine was able to run at 40mph for a couple hours with no problems other than my nerves and my butt. Too late for that, you have a 212.
Typically we adjust gearing to get cruise speed at max torque and top speed at max revs. This is so you can get up hills. Going down will be easy with that iron plate.
This was a lot less conspicuous and and handles a lot better than being pushed by a wagon. Jus'sayin'.
Man, I'm looking at that 1/2" plate and I'm thinking "WOW, what does THAT weigh?" Hope you don't have to stop on a down hill.
So trying to be helpful, The connecting rod will likely part company if you go much over 5500 rpm on the 212. Floating valves are indeed an effective governor. Good advice from Mark up above.
The China Girl does 6-7000 rpm stock and can be made to run up to 10,000. Mine was able to run at 40mph for a couple hours with no problems other than my nerves and my butt. Too late for that, you have a 212.
Typically we adjust gearing to get cruise speed at max torque and top speed at max revs. This is so you can get up hills. Going down will be easy with that iron plate.
This was a lot less conspicuous and and handles a lot better than being pushed by a wagon. Jus'sayin'.