I Need A New Motor

[mk1]

Dudes , i need your advice.
Just broke my engine , ada head , 37cc domes, 46mm carb, b pipe , etc.
And i would like to replace it with an engine with a bit more poke, but need reliability.
Needs to bolt right in without any size issues and be compatible with the engine mounts, b pipe, carb, drive coupler etc.
I heard that a 760 will fit.. ?
What have you in yours.....
Thanks in advance...

 

[SmittySX]

JM 781 would be a nice little upgrade and would be compatible with what you have.

 

[MarkWalker]

Most important question is budget? That will dictate which way to go on a motor.

 

[Quinc]

Any Yamaha 701/760 engine will drop right in. What "Broke" on yours and why not fix it?

 

[SXIPro]

If you step into a motor with too much more 'poke' you're gonna need to upgrade your pump to a 140 or 144mm

 

[mk1]

If you step into a motor with too much more 'poke' you're gonna need to upgrade your pump to a 140 or 144mm

Thanks SXIPro ,
I have a Blowsion 144MM pump conversion kit allready fitted.

 

[mk1]

Any Yamaha 701/760 engine will drop right in. What "Broke" on yours and why not fix it?

Don`t know yet ,
but compression on one cylinder is 155 ,
the other one comes in at 20... !

 

[mk1]

JM 781 would be a nice little upgrade and would be compatible with what you have.

Thanks Smitty , JM , is that Jet-Maniac and how much does a 781 motor cost.?

 

[SmittySX]

Heres the link to JetManiac’s for sale thread.

http://www.x-h2o.com/index.php?threads/big-bore-781-freestyle-ported-jetmaniac-blue-motor.94512/

I’m running a JM781 with very basic parts and i can flatwater flip a 300lb ski.