212cc top speed?

[BruceBanner1983]

I realize this might be a crazy question and no one might know the exact answer, but a ballpark answer would be good enough. Does anyone know what top speed to expect on a 212 with 26” wheels, torque converter and 48t rear sprocket, 10t on the jack shaft? I’m gonna be running a rear moped hub and the biggest sprocket I could get to fit the moped hub was 48t. Oh and the governor will be bypassed.

 

[Wrench]

IDK for sure, but with 6 hp I hope ya see at least 45 - 50 mph

@Sidewinder Jerry is the gear ratio nerd maybe he'll chime in

 

[Chainlube]

I realize this might be a crazy question and no one might know the exact answer, but a ballpark answer would be good enough. Does anyone know what top speed to expect on a 212 with 26” wheels, torque converter and 48t rear sprocket, 10t on the jack shaft? I’m gonna be running a rear moped hub and the biggest sprocket I could get to fit the moped hub was 48t. Oh and the governor will be bypassed.

My cart does 40 all day with 24" wheels and a 60t. Same setup as yours.

 

[Chainlube]

Oh, I should mention, I have a 7" driven clutch on a Max-Torque TAV.

 

[BruceBanner1983]

Oh, I should mention, I have a 7" driven clutch on a Max-Torque TAV.

Ok I’m not sure what the size is on mine. It’s an asymmetrical torque converter from gopowersports. It’s def not 7” though. But if you’re getting 40 with that setup, I’d say 50 would not be out of the question in my bike. Speed limits where I’ll be riding go up to 45. I can’t find the diameter of the driver on mine though but I can measure it tonight.

 

[Sidewinder Jerry]

Ok I’m not sure what the size is on mine. It’s an asymmetrical torque converter from gopowersports. It’s def not 7” though. But if you’re getting 40 with that setup, I’d say 50 would not be out of the question in my bike. Speed limits where I’ll be riding go up to 45. I can’t find the diameter of the driver on mine though but I can measure it tonight.

To do 46 mph on 26" wheels at 3600 rpm will take a 6\1 reduction. I belive the Ghost 212cc engines are pushing 5000 rpm now.

Here's my 3 formulas:

(RPM × Wheel Diameter × π)÷(1056 × Total Reduction)= MPH

(MPH × Total Reduction × 1056)÷(Wheel Diameter × π)= RPM

(RPM × Wheel Diameter × π)÷(1056 × MPH)=Total Reduction.

Yes, my fellow riders that last formula is a new one.

 

[Sidewinder Jerry]

(5,000×26×π)÷(1,056×4.8)=80.5727282526 mph

 

[GW's Motorized]

Ok I’m not sure what the size is on mine. It’s an asymmetrical torque converter from gopowersports. It’s def not 7” though. But if you’re getting 40 with that setup, I’d say 50 would not be out of the question in my bike. Speed limits where I’ll be riding go up to 45. I can’t find the diameter of the driver on mine though but I can measure it tonight.

You should be able to hit 45. I suggest you at least replace the flywheel woth an aluminum one if you are going to bypass the governor.

 

[Sidewinder Jerry]

Looked up PA legal statutes and a moped is limited to 25 mph. Beyond that your state then considers the vehicle to be a motorcycle.

 

[BruceBanner1983]

You should be able to hit 45. I suggest you at least replace the flywheel woth an aluminum one if you are going to bypass the governor.

How high is it gonna rev? I’m seeing maybe around 6-7k and I thought the billet flywheels were for 10k+ but I will look into it.