Turning Two into One

[Tony]

Hey i have a 2 cylinder yahmaha 340 snowmobile engine. I need to turn it into a single cylinder. Do you guys think it its possible?

 

[Kaptain Krunch]

Probably, but why would u want to?

 

[Tony]

vintage snowmobile races. It has to be one cylinder. I also wanted to install dual plugs in the head which would be easier to do with a 2cylinder.

 

[Kaptain Krunch]

I would take the mag side cylinder, con rod, and piston out, and make a cover for it, personally i would get a single cylinder engine and use a twin coil...

 

[Tony]

I have a single (292 sachs) but it needs a head and im building on a budget. The yahmaha was free so i thought why not.

 

[solomon]

sounds like you will need to play a little with the timing though.

 

[Kaptain Krunch]

sounds like you will need to play a little with the timing though.

And why is that?

I guess if it was free go for it... The only problem i see if the crank bearings in the cylinder u take off will be in trouble, if you filled it with oil the crank would probably just churn the oil.

 

[solomon]

I would imagine the timing would be off due to the motor running on 1 cylinder instead of the 2 cylinders it was timed for, but i guess if tier was no piston in that cylinder i would be fine. IDK i just figured the timing would be off, by doing that to an engine

 

[Kaptain Krunch]

I would imagine the timing would be off due to the motor running on 1 cylinder instead of the 2 cylinders it was timed for, but i guess if tier was no piston in that cylinder i would be fine. IDK i just figured the timing would be off, by doing that to an engine

Shouldnt be, both should fire every revolution regardless, at least most do.

 

[Tony]

the timing wouldnt be off unless i did the 2 plugs in one head. But i just realised that one cylinder of a 340 is 170. That isnt engought so its back to my sachs.