Is there a web-site about the polaris liberty even firing parallel twin motors? One with drawings and stuff? Thanks for the information.[img]i/expressions/face-icon-small-smile.gif[/img]

 

[img]i/expressions/face-icon-small-frown.gif[/img] Does anyone know the website???? I have tried to find it, but to no avale.

 

This is the closest thing I know of to what you might be looking for. This is the main link and you can look at diagrams of any assembly you wish from here.

Diagram

 

Thanks, that helps, but I am trying to figure out the strokes of the polaris parallel twin motor. The information on the web site for polaris says it is an even-firing parallel twin. Does that mean that each piston moves up at the same time, fires together, then does another stroke without firing for the exhust? Or is it similar to the kawasaki v-twin that fires alternatly. When one of the piston is firing, the other one is on its exhust stroke and then they switch. So, I am trying to figure out the polaris parallel twin. Please help. Thanks for any information.

 

Yep, the pistons do rise and fall together. But the firing order happens 360 degrees apart. As one cylinder fires, and goes down, the other is on the intake stroke, going down.

 

Are you also looking for bore x stroke info?

 

I always thought that Even Firing meant that they fire together to maintain the sound of a single cylinder thumper....thats what i've heard...

 

I heard that the polaris twin cylinder both cylinders fire at the same time. Why not just make it a single you ask, they did that to keep the motor relativly short to try and keep the c g down. they made it even firing to increase torque.

 

But if you fire alternatly, you will produce more torque and horsepower since you always have a cylinder firing on any given stroke while the other is on the exhust/intake stroke. That is why the kawa v-twin produces so much torque and HP. I am trying to find out if both pistons in the polaris fires at the same time and then the next revolution they are on the exhust stroke???????

 

Both pistons travel together but one cylinder fires when the other is on the exhaust stroke.