760 is it worth the time

[mopower77]

i have a chance to buy a brand new rebuilt 61X cylinders with big bore sleeves, with ports to cylinders ports matching port job, yamaha 84mm 64X pistons (standar bore 760cc) with a nice 180psi high compression head at a very good price does anyone know if this would be a good setup up for a 91 superjet or to add exhaust or other parts to it inexpensively has optional case set up to go with it too

 

[sflsurfrider]

yes. go big bore! well worth it, mr 'mopower'!

 

[Matt_E]

Definitively go with the bigbore!
Make sure you know who built it, and that it was a quality job.

An unreliable big bore isn't much fun (as I found out last summer).

 

[mopower77]

thank you

 

[jetski9010]

what size carbs do you think are best for a 760?

 

[sflsurfrider]

a stock 760 comes with dual 44s.

go from there.

 

[x2skier]

Modified 38s, OEM 44s or Full Spec 46.

 

[Williamson.e46]

Reply

There is no replacement for displacement!

 

[puppy]

Is this the motor

for auction a have a Real niceengin for your yamaha waverunner. brand new rebuilt 61X cylinders with big bore sleeves with a nice freestyle porting job. yamaha 84mm 64X pistons (standar bore 760cc) with a nice 180psi high compression head built by riva yamaha a profesional watercraft shop with warranty. low less than 25 fresh water hrs HOD RODS crank in nicely ported 62T crankcases. also include starter, reeds, flywheel stator cover and cratles if needed. Everything brand new gaskets, seals with a fresh paint job not only it looks good but also horse power gain guarantee.

will fit any yamaha jet ski with a 650, 700 or 760 engine.

email me to make sure it will fit your ski before you bid.

 

[infamy]

for auction a have a Real niceengin for your yamaha waverunner. brand new rebuilt 61X cylinders with big bore sleeves with a nice freestyle porting job. yamaha 84mm 64X pistons (standar bore 760cc) with a nice 180psi high compression head built by riva yamaha a profesional watercraft shop with warranty. low less than 25 fresh water hrs HOD RODS crank in nicely ported 62T crankcases. also include starter, reeds, flywheel stator cover and cratles if needed. Everything brand new gaskets, seals with a fresh paint job not only it looks good but also horse power gain guarantee.

will fit any yamaha jet ski with a 650, 700 or 760 engine.

email me to make sure it will fit your ski before you bid.
View attachment 79820

is this the same motor that has been on ebay for months? or are you building several that are built and painted identical?

 

[puppy]

Yes that motor has been on ebay off in on not mine but sounds like mopower77 spic"s

 

[mopower77]

never ended up buying this motor i went with a 701

 

[Shonuff]

Then I won't tell you how insanely nice 760s are.

 

[strictlystandups]

big bores are good on everything! except on women

 

[Motorheads5]

IDK I like big jug's on women.

 

[Polish jet pilot]

So HOW nice are ported 760's?? FS porting, of course...

 

[nutz]

big bores are good on everything! except on women

:haha:

Just ran my new motor in this weekend - Loki ported 760 - i love it:wiggle:

 

[yamanube]

big bores are good on everything! except on women

That all depends on the size of your piston. :cool2:

 

[strictlystandups]

That all depends on the size of your piston. :cool2:

regardless of piston size I dont like to hear the ocean when I'm near the intake port of the girls cylinder. :no:

 

[Shonuff]

So HOW nice are ported 760's?? FS porting, of course...

Smoother powerband. It just keeps on climbing. Awesome feel.