Search

I never said he was going to get more power, we were talking on making things easier, EFI IS DEFINITELY EASIER TO WORK WITH , AND LOT MORE RELIABLE THAN CARBS. it will start and idle much better ....

Yeah i agree reaper. I've thought about doing the same eventually with my gp1200r hull once I'm done with the 1200 engine.

i'll keep telling you, drop the 1300r EFI setup lee has , and you will be blasting these xp's .[/QUOTE]

Why do u believe the FI setup will provide more power? FI is definitely not as finicky and...

Reaper - I mentioned a/f ratio because we're comparing FI vs carbs. In my case stock timing is considered so timing isn't in the discussion.

i'll keep telling you, drop the 1300r EFI setup lee has , and you will be blasting these xp's .[/QUOTE]

Why do u believe the FI setup will provide more power? FI is definitely not as finicky and...

Let us know...

What are you running low 70 s with?

Well, I did some top speed runs this past wknd. Speed was not close to what i was hoping for, but the water was extremely rough due to the wind. I found a few spots on the lake where the water was...

Definitely do not use the stock grate at 70mph. But on the rideplate I think Jim can MOD it but I think the FF MOD is only for the r&d plate but I should let Jim answer that really.

Thanks Jay. Not really sure what to expect by swapping the FF for stock exhaust. Even with the head shaved the compression is still marginal at 135# (all 3-cyl) since it's a 1200, and with a 1200...

Correct. 65.9 was with R&D rideplate & FF exhaust. Swapped the R&D for Jim's R&D plate & swapped the FF for the stock exhaust box.

Will let you know once I test it.

So I'm opening this thread up just for kicks. I purchased a GP1200R in the spring & it already had all the MODs listed in my sig. I removed the FF exhaust in favor of the stock sound suppression...

Do you have to? No. But since a shaved head will raise cylinder temps you're best off removing the cat to help keep temps down. Besides the cat won't last forever anyway & will eventually come apart....

My glove box is still alive on my 2001 gpr, but who needs a 'glove' box on a ski anyway??? :-k

68mph is good for what you've listed.
13/19 is for low & midrange acceleration. 14/21 wil be too much for stock power. You'll need to have your head milled to raise compression for more hp, and...

GPR hulls have been doing 90 mph for yrs a few over a 100mph,that's with a SHO engine or Rotax engine...

Over stuffed pumps, pump tunnel cracking ,intake grates breaking and of course sometimes...

Interesting read.

http://watercraftjournal.com/incredible-hulk-behind-man-behind-industrys-successful-forum/

Would a GPR SMC hull have the same issues at 90mph?

LMAO

LT1, Also, Super M as you stated is a synthetic BLEND. How much synthetic? Most synthetic 'blends' are only 20% synthetic.

LT1.. There are different qualities of synthetic oils. Some are indeed better or 'slippery' than others. If you use synthetic oil for break-in you have a higher risk of the rings not seating...

Yamalube is not synthetic. My advice, go ahead and use it up. Then go to which ever oil you plan to run long term. Plenty of skis with hundreds of hours that use yamalube.
P.S. Make sure your...

Correct. It's best to use a non - synthetic oil for break in for ring set. Doesn't really matter which one as long as it's a good quality oil. That's why I recommended yamalube.
What LT1 stated...

Use yamalube. Mix 25:1 for premix in 1st tank, or if using oil injection mix 40:1 in your 1st tank. Basically you want the mixture to be twice as strong as normal for the 1st tank. Remove the CAT...

Yes, that is in fact how yamaha advertised/advertises. Just Google-ed it & this is stated clearly on their web page.

I love yamaha engines...maybe I'll just do a conversion ski... 4-stroke in a...

skylolow


Some truth to what you've stated, but maybe TV's aren't a good example. Had an old school rca that was still working when I got rid of it 17 yrs. The Panasonic plasma that replaced it...