Here it is. Yamaha X2.

[Crab]

Good idea. I'll look into that. This isn't the ultimate solution. I'll be grinding the ribs out, and glassing in some plates for the yamaha mounts. I know that will work, and will be plenty strong for me. Just not a bolt in solution, like the plate I'm using.
As for now I just used longer bolts, no spacers but I've got spacers being made and on the way shortly to fill the gap. Also keep in mind I'm using a 650 for testing purposes, not the most torque, haha.
Also, does anyone know if a 650SX or any other driveshaft is a little bit shorter..? I was thinking the X2 shaft doesn't fir other ski's for some reason. I want the engine about an inch further back. I'm having issues getting the FPP chamber in there because of length..

Sx is 6 inches shorter, move the pump back perhaps.

 

[ADDict]

Sx is 6 inches shorter, move the pump back perhaps.

Well thats shorter than I had hoped! I need to save up the bucks and get a fpp manifold. I had been using a couple different ones (not fpp,) on the 780, and hoped I could modify my 650 coffman to fit but it's just not going to happen. Not without damaging it possibly beyond repair, for something I don't even know will work for sure.
I need a 701 FPP mani in a bad way. Just can't cough it up right now. Hopefully I can have one soon, until then the X2 is parked. I can't stand riding it with no power. I'd rather watch video's of my good times.

 

[Crab]

They are around, I am picking one up at Pismo as well, they get good money.

 

[ADDict]

They are around, I am picking one up at Pismo as well, they get good money.

Yeah thats the ticket. No way without major mod's to make it fit the coffman.. I had hoped it would, I guess since it fit my coffman Kawi mani as well as others I thought I had a chance.
Looks like I'm going shopping. Have to need parts when I'm BROKE..

 

[dbrutherford]

If he paypals you $2 then send him a pic of a pile of dog sh it.

In a paper bag, on fire, on your porch?


Will, if you use a shorter drive shaft I think the head pipe will hit the hull brace/hull.

 

[WFO Speedracer]

In a paper bag, on fire, on your porch?


Will, if you use a shorter drive shaft I think the head pipe will hit the hull brace/hull.

Get another Puddlepuzzy coupler and have it bored and rethreaded to fit the Yamaha crankshaft,that should give you your inch you are looking for ,you may have to use a spacer between it and the crankshaft though.

 

[yamanube]

What about an adapter plate to bolt a kawasaki pipe to a yamaha cylinder?

 

[dbrutherford]

What about an adapter plate to bolt a kawasaki pipe to a yamaha cylinder?

No need, just use a FPP Yamaha manifold. Then you just use any three bolt head pipe (Kawasaki style) and it will bolt right up to the manifold.

 

[yamanube]

No need, just use a FPP Yamaha manifold. Then you just use any three bolt head pipe (Kawasaki style) and it will bolt right up to the manifold.

Yeah but shlt you can get kawasaki exhaust (generally) much cheaper and much more abundant. Ive got a plate to put a kawasaki 750 manifold onto 61x/701 cylinders and would probably be pretty easy to recreate...just thinking out loud, it seems 750 pipes are easier to find and fit into an X2 than B pipes.

 

[dbrutherford]

You can still use 750 pipes. You just need the FPP Yamaha manifold that makes the head pipe to exhaust manifold the 3 bolt pattern.


Post a pic of your adapter plate. I have only seen ones that made it where you could use Yamaha exhaust manifolds on Kawasaki cylinders.

 

[Motorheads5]

Yeah but shlt you can get kawasaki exhaust (generally) much cheaper and much more abundant. Ive got a plate to put a kawasaki 750 manifold onto 61x/701 cylinders and would probably be pretty easy to recreate...just thinking out loud, it seems 750 pipes are easier to find and fit into an X2 than B pipes.

I would like to see a pic of that plate also, one thing for sure though is on my 750 x-2 there is no room to space the manifold away from the cyl. it is already almost to tight with a fatty blaster chamber on there, but hey you never know.

 

[shawn_NJ]

Will, hopefully I'll be able to get the motor out of my lightweight this weekend. If I do, I'll snap some pics for you and take a few measurements.

 

[dbrutherford]

Here is the plate that lets you use Yamaha exhaust manifolds on a Kawasaki cylinder.


He is claiming he has the opposite.

That there is a plate to use a Kawasaki exhaust manifold on a Yamaha cylinder.

I just don't see the point when all of the FPP Yamaha exhaust manifolds have the Kawasaki three bolt top pattern anyways. Then you just use a FPP head pipe and any chamber of your choice.

 

[yamanube]

Here is the plate that lets you use Yamaha exhaust manifolds on a Kawasaki cylinder.


He is claiming he has the opposite.

That there is a plate to use a Kawasaki exhaust manifold on a Yamaha cylinder.

I just don't see the point when all of the FPP Yamaha exhaust manifolds have the Kawasaki three bolt top pattern anyways. Then you just use a FPP head pipe and any chamber of your choice.

Because "just getting" an FPP manifold is not always as easy as it sounds and buying a complete 750 can sometime be just as cheap/expensive.

 

[ADDict]

I agree on the ease of finding a cheap Kawasaki pipe. As for the adapter plate, in something like an X2, you want all the room you can get. With the 701 in the hull, I'm having to smash the side in a little of my chamber to get it back to the headpipe. I think I would just buy the FPP manifold. They are $205 brand new. Then if you decide to go with a factory pipe, it will work. Otherwise if you get tired of switching around pipes, and want to get a Factory headpipe and chamber, you absolutely cannot get the headpipe to fit. The FP manifold is just universal.
On my old 780, I ran a Coffman Kawasaki manifold, with the Factory headpipe. I tried to fit a Factory headpipe onto my Yamaha 650 Coffman manifold, and it wasn't happening. If your sure you don't ever want to go with the Factory pipe, you can get a 650 Coffman manifold. It uses the exact same 3 bolt pattern all the Kawasaki's do. I was able to pick one up brand new from Coffman recently at a VERY nice price. I bought two actually.

 

[Motorheads5]

Here is the plate that lets you use Yamaha exhaust manifolds on a Kawasaki cylinder.


He is claiming he has the opposite.

That there is a plate to use a Kawasaki exhaust manifold on a Yamaha cylinder.

I just don't see the point when all of the FPP Yamaha exhaust manifolds have the Kawasaki three bolt top pattern anyways. Then you just use a FPP head pipe and any chamber of your choice.

Thank's db I have never seen that adapter plate option before.

 

[dbrutherford]

I agree sometimes parts are tough to come by. The adapter plate I posted a pic of is for sale by Blowsion. I thought of getting one for my 800 SXR engine and then using a Power Factor pipe. But being I already have a nice FPP setup, I will just use that.

I would still like to see the pic of the adapter plate you have. I also believe EME uses an adapter plate on their 777 Polaris engines to use the Power Factor pipe.


I know exactly what X2Addict is talking about though. I saw a mariner 650 manifold once used on an X2 and it wouldn't let the FPP B pipe head pipe mount onto the engine because the head pipe hit the side of the hull. However with a stock Kawasaki 650 exhaust manifold, it fit fine. The Mariner spaced the head pipe too far out from the engine. And it wasn't the wacky Mariner/FPP 750 rotated manifold for the 750 wet pipe.

You might be able to make the bed plate angle the yamaha engine slightly for more clearance. Yet then you run into problems with the flame arrestors hitting the other side of the hull.