Using a 301cc Predator engine from Harbor Freight

[PyroPanda666]

The more power that you transfer to the rear wheel, the beefier things have to be. Standard bike parts are not strong enough.

So I’ve found a kit that’s without the engine for the 212 predator. It comes with a 10t jackshaft sprocket which if I can fit it I’d like to use the 18t jackshaft sprocket. And using the 20t rear sprocket that fits on the red cnc hub adapter.

 

[Chainlube]

So I’ve found a kit that’s without the engine for the 212 predator. It comes with a 10t jackshaft sprocket which if I can fit it I’d like to use the 18t jackshaft sprocket. And using the 20t rear sprocket that fits on the red cnc hub adapter.

Are you going to have functioning pedals? You will have to get it up to 20 mph for that gear ratio to be any good.

How fast do you want to go?

Most traffic isn't expecting you to be going 50.

 

[Gordy]

Then why can a stock ruckus go 35mph but you only need a class c. It will go 40 now with the 5.5 g sliders and lightweight flywheel. I want to do a performance cam and taller final drive gears too (met gears).

Just because it can, doesn't mean it's supposed to. A ruckus going 35 would land you at least a ticket.

 

[michael whiteman]

Wow, this thread has really caught fire since this afternoon, so let's slow things down a bit and answer some questions. I just installed my billet FW yesterday and surprisingly it appears to weigh the same as the cast iron one. I haven't weighed it yet. It doesn't appear to be lighter and that could be if it was, it might mess up the factory balance.

The output shaft on a CVT is considered a jackshaft because you have one ratio from it to the engine and a second ratio from the output to the rear wheel. All the ratios in the CVT will be between 3:1 and 1:1 and you can't change that. You can change the ratio between the CVT output and the rear wheel. You first need to decide if you really want to spend more for a CVT or use a Max Torque clutch. I'm big on Max Torque because they offer multiple springs to taylor your lockup rpm along with being a bullet proof design. The CVT per say does not have a clutch but operates like a snow mobile. A clutch will allow you a wider ratio range in the first stage. Have you looked at the speed/ratio chart I posted? You first need to decide how fast you expect to go and at what rpm. Then you start plugging in teeth count numbers until you finally get what you're looking for and it will tell you what the overall ratio is. Then get back to us and someone will reply with real world results on their bike. A built up 212 will make power power than you need.

 

[michael whiteman]

So I’ve found a kit that’s without the engine for the 212 predator. It comes with a 10t jackshaft sprocket which if I can fit it I’d like to use the 18t jackshaft sprocket. And using the 20t rear sprocket that fits on the red cnc hub adapter.

Just for grins I ran this sprocket combo through the calculator and it said you'd be going 349mph at 5000rpm.
This would be a great choice if you plan to take it to the Bonneville Salt Flats. PLEASE! Don't buy anything until we can help you choose what really works. First, decide if you want a CVT or a clutch. We're here for ya

 

[PyroPanda666]

Just for grins I ran this sprocket combo through the calculator and it said you'd be going 349mph at 5000rpm.
This would be a great choice if you plan to take it to the Bonneville Salt Flats. PLEASE! Don't buy anything until we can help you choose what really works. First, decide if you want a CVT or a clutch. We're here for ya

I meant to type 28 tooth.

 

[PyroPanda666]

Just for grins I ran this sprocket combo through the calculator and it said you'd be going 349mph at 5000rpm.
This would be a great choice if you plan to take it to the Bonneville Salt Flats. PLEASE! Don't buy anything until we can help you choose what really works. First, decide if you want a CVT or a clutch. We're here for ya

Definitely am not buying anything until I’m 100 percent confident what I’m buying works the way it’s supposed to.

 

[PyroPanda666]

Are you going to have functioning pedals? You will have to get it up to 20 mph for that gear ratio to be any good.

How fast do you want to go?

Most traffic isn't expecting you to be going 50.

I wasn’t exactly planning on having functional pedals.

 

[michael whiteman]

I meant to type 28 tooth.

That good, now you're only going 248mph with your CVT at 5000rpms. It's hard to make pedals work with a Predator because they are so wide. I went to a lot of trouble to make mine work but it was only to convince the cops it still is a pedal bike. It only goes 6mph but the law doesn't state how fast you have to pedal. It's all in my thread.

 

[PyroPanda666]

That good, now you're only going 248mph with your CVT at 5000rpms. It's hard to make pedals work with a Predator because they are so wide. I went to a lot of trouble to make mine work but it was only to convince the cops it still is a pedal bike. It only goes 6mph but the law doesn't state how fast you have to pedal. It's all in my thread.

I’m not exactly dead set on speed vs torque, ideally I’d like to know what ratios of sprockets I’m looking to get. The kit I’ve got waiting in my cart until all else is figured out. Says it has a 10t sprocket. What size sprocket should I get for the rear if I want to look at going around 50-60. Aiming high side of 75 but like I said. Speed isn’t exactly what I’m after. More so a good mix of speed and efficiency. I’m not exactly sure how to use the calculator that was posted. And I have 26 inch tires by the way.