The Best Donor SKI - 1997 GP760

[ItsRixter]

I recently picked up a 1997 GP 760. I didn't know too much about the parts on this boat, I just wanted it for the motor. However, the more I tear into this and read up on the parts, I feel this is the best donor ski for superjets and waveblasters.


I had a 1999 GP 1200. It was fast but had huge porpoising issues (even with prop, ride plate, intake grate and hull tabs) so I didn't like the hull design. However, this little 760 version is a great parts ski. Besides the motor, here are (in my opinion) why this is the best donor ski.


1) 144mm pump. Stator and exit nozzle are direct replacements for SJ & B1

2) Drop nozzle. This ski comes with trim so you can modify it to a drop nozzle

3) Mid Shaft- Highly sought after for B1 1100 conversions

4) Battery tray, bolts and straps are same as SJ

5) Waterbox & hoses- Use for B1 rear exhaust conversion (including B1 1100 conversions)

6) Drive shaft – the 30 inch drive shaft is the right length for a B1 setback mag pump.

7) Usual stuff (any Yamaha ski) – Pump and intake bolts. Motor mount bolts, Fuel petcock, fuel pick up. 3 bow inserts.

8) The ebox has the leads for RPM, fuel level, temp, speedo, etc. The display gauge might be a nice option if you are into fiberglass work on the hood mod.

9) After all that - the seats, seat latches, two storage bins all have great eBay value. The front hood cover might also fetch a few recovery $$.

 

[Idok]

I parted a venture one time, and couldnt believe how much the hood was worth!

 

[Nemo]

I parted a venture one time, and couldnt believe how much the hood was worth!

X2

 

[RivMan]

I bought a GP760 a few weeks ago while I was on vacation because I messed up my flywheel bolt and woodreff key. I ended up pulling a few parts off of it and dragging it to the local dump...

I've already sold the few parts I pulled off for far more then I paid for the ski! I should have pulled a lot more parts, but I was already on thin ice with the wife after spending a day of our vacation driving around looking for jetski parts, buying a poopty jetski, parting out that ski, then driving around looking for someplace that would take the hull!

-Rob

 

[ItsRixter]

Rob tell me you pulled the pump out of that GP before the dump! I see it laying there on the side with the pump in it!!!!

Oh I forgot to mention having a pink slip and registration as a last usable scrap item ( wink wink).

 

[RivMan]

I didn't realize that the ski used a 144 pump, or desirable driveshaft, so I gave up trying to pry it out of the hull. Someone had installed it using what looked like 3m 5200, and I couldn't get it to budge.

I also left the title / hull intact and gave it to the salvage yard.

The only parts I really kept were the Motor, Ebox, Midshaft, Waterbox and Nozzle.

-Rob

 

[ItsRixter]

That mid shaft was worth $100- $125. Battery holder and cables $15. Waterbox $75- 100. Loads of stainless steel bolts- priceless.
oh looks like you did take the water box..good man!

 

[RivMan]

I got the midshaft too, shipped it out yesterday! Also kept a whole bucket of bolts, motor mounts, ect...

 

[ItsRixter]

I wonder if cutting the rear section of the GP hull is a good part to use for the CarterB B1 conversion?

 

[Vumad]

Anyone able to provide a concrete answer to this question...

Can the Yamaha 760 motor, that is to say, the cases, crank, intake, reeds, electronics, everything, have a 61x cylinder bolted on to it with a 61x ADA girdled head and FPP then work exactly the same as a 62T donor ski, but with bigger carbs included. Because I'd much rather get a GP760 for my next donor because of the carbs but I'm not sure about the cylinder swap 100%. If buying a 62t/62t, still going to need to do a cylinder swap if wanting 61x, so why not jet get bigger carbs in the deal. I thought 62t and 760 were the same bottom end.

 

[mike b]

I wonder if cutting the rear section of the GP hull is a good part to use for the CarterB B1 conversion?

Is that what he did? I saw one of his with rear exhaust above pump and loved the look! Ideas ideas ideas

 

[JetManiac]

Anyone able to provide a concrete answer to this question...

Can the Yamaha 760 motor, that is to say, the cases, crank, intake, reeds, electronics, everything, have a 61x cylinder bolted on to it with a 61x ADA girdled head and FPP then work exactly the same as a 62T donor ski, but with bigger carbs included. Because I'd much rather get a GP760 for my next donor because of the carbs but I'm not sure about the cylinder swap 100%. If buying a 62t/62t, still going to need to do a cylinder swap if wanting 61x, so why not jet get bigger carbs in the deal. I thought 62t and 760 were the same bottom end.

Much better to start with a 62t raider, then you get all 62t electrics instead of the 760 electrics. The cdi is digital and not replaceable with an msd enhancer, etc. The flywheel is much heavier than 62t as well.

 

[kurtwolff]

What JM says is true. But, if you get a good deal on a 760, and swap your FW/stator to 61X equipment, you can run an Enhancer and be in business. All depends on what donor ski you can get a good deal on!


Sent from my iPhone using Tapatalk

 

[RivMan]

Much better to start with a 62t raider, then you get all 62t electrics instead of the 760 electrics. The cdi is digital and not replaceable with an msd enhancer, etc. The flywheel is much heavier than 62t as well.

Yup, that's what I found as well. I kept the cases and carbs from my GP760, but the flywheel, stator and front cover I sold. I plan to build a 62T bottom / 61X top motor, with the 61X ebox setup out of my SN.

-Rob

 

[ItsRixter]

Well I'm hearing some of you think the wave raider 701 is a better donor ski.

What size pump is on that, 144?

I thought those couch 701s ( 62t/ 62t) where not very good motors. I realize the 760 in stock form doesn't deliver great bottom end, but keep in mind the stock 760 (62t/ 64U) has the carbs set differently and the head has two dome sizes. If you changed the pilot jet on the carbs to match and got a head with same compression domes its a better motor. Obviously the port timing is more for mid and high speed. However, the raider 701 port timing, dual pulse line and such aren't as ideal either

It seems the best hybrid would be the 760 motor and carbs with 701 flywheel and 62t electronics.

But back to my original point of best over all donor ski for blasters and super jets - does the wave raider have a better break down list of swappable parts and high value sellable components than what I listed for a Gp760?

 

[ItsRixter]

Is there a difference between 61x electronics ( I.e what is in a 1993 blaster) and the 62t electronics in a 61x/62t motor like 96 and newer supejets ( as well as 1996 blaster)?

 

[JetManiac]

Is there a difference between 61x electronics ( I.e what is in a 1993 blaster) and the 62t electronics in a 61x/62t motor like 96 and newer supejets ( as well as 1996 blaster)?

As long as you match the stator and flywheel to each other (both x or both t) , then you can use the x or t electrics in any 650, 701, 760 motor. The charge coil is slightly larger in the t stator which results in a somewhat hotter spark.

 

[JetManiac]

From your first post:
"1) 144mm pump. Stator and exit nozzle are direct replacements for SJ & B1"

This is not correct. You probably meant they will bolt up to a SJ/B1 pump. Exit nozzle is 144mm so it will fit on any 144 pump but is not a direct replacement and is different from any SJ and B1 exit/reduction nozzles.

All B1 and 90-07 SJ have non-trim standard reduction nozzles and non-trim steering nozzles.
08-up SJ have trim reduction and steering nozzles but they are 62t like those used on 701 raiders.

The GP760 reduction nozzle has a different shape and a 5deg up angle built in. It is great to use on certain setups but just wanted to point this out. The GP760 steering nozzle is also different than the 62t steering nozzle.

 

[surfjunkie]

I parted a venture one time, and couldnt believe how much the hood was worth!

Thankfully Jetmaniac gave me a heads up on that before I ebayed it for $30