The GP1200 is a nice boat. I sold mine to buy the 1200r since I race. I found in 1999 that I could not compete with the ultras on my GP. The 1200 R with the same amount of mods [head, plate, grate, prop, rejet, f/a] will do a **** of a lot more for a performance person than a GP1200 will. I know.
As for play, I have played in the surf with both. the GP is lighter, the GPR has more power. So after it is hopped up slightly, the GPR will do the job for most performance lovers. If a p;erson buys the 1300r with the idea in thier head that It will match the holeshot of a modded GP1200, they have not actually been looking at the numbers being posted about these boats.
As for what you can do with them just playing, well no one has taken pix of me yet but here are shots from www.jetraid.com. note that the invert is being done on an XLL!!! Just takes practice.

[ 05-27-2003, 02:18 PM: Message edited by: CHRIS SMITH ]

Click here for a better sized shot of the XLL XLL RE-Enrty

[ 05-27-2003, 02:08 PM: Message edited by: CHRIS SMITH ]

My mistake, Ha HA!! It's an SUV!!! So... POOKIE can't get his wittle GP1300R to fwy wike his wittle GP???
Seriously mate, Just give it a little time. I thought My Gp1200 would never be able to fly when I first got it. some parts and 2 Weeks later I was a believer.

Whats up. I understand that the gp1300r with some mods will really perform well, better then anything I have had in the past. All I am saying is that I am not happy with the ski. Its just my opinion. The next person in line might love theres, and there are plenty of people who do. For some reason in the past few days I am being told that I dont know SH$t, my 1200 stinks, and its almost like I have 10 of you wanting to kill me. Relax, I just dont like my 1300 and I have been stating why. I spent $9000 on it and I was hoping that it would have come faster. My type of riding is mostly based on accelerating rather than top speed for long distances. So if I put some mods on it , it will pick up, I understand that. I was just hoping it would have had a little more pep stock, this way when I threw some inexpensive mods it would really haul. I am on a real tight budget now, so me spending more than $1500 on this ski isnt going to happen, and this ski really exploding out of the hole and accelerating the way I want it to , is about $3000 away. Thanks. Mike

I'm a "newbie" and appreciate the opportunity to learn from you guys. It appears there is a wealth of experience on these boards and many helpful hints. Although I disagree with NJGP1200's opinion of the 1300r (probably hardened by some adverse responses to his post on this matter), I respect his opinion and appreciate the help he gave me on this forum recently. I'm sure many of the others on this particular post have expertise and experience that could help others as well. I only wish I didn't have to skip past the "bad" stuff, to get to the "good" stuff.

NJGP1200 wrote quoted: My type of riding is mostly based on acceleration rather than top speed for long distance.

Listen dude, if your main goal is acceleration then perform the following mods.

1)Riva high comp. cast heads
2)Riva PPK (pump plug kit)
3)Riva ride plate
4)Riva 2 bars intake grate
5)Riva billet prop cone
6)Gpr 1200 00 to 02 87mm nozzle (replace new 85mm)
7)reseal the pump with 5200 fast cure silicone
8)Riva or IR solas 13/19 set back prop (this prop is a killer from a dead stop no other prop can touch this one on the first
50' to 100') from the hole, "been there done that" in the past with my stage II 01 Gpr i have had try them all, the 13/19, speedfreaks custom speed cut and depitched solas 14/20 this prop is very similar to the IR I cut, speedfreaks nujet prop repitched to a 13/19 this prop comes as a 14/18 from the factory
9)Riva or R&d free flow exhaust, according to Tim Judge this mod is the best to increase this boat midrange power.

Don't you ever try a gp 800 grate in your 1300R in the good side, this grate will increase your boat top end power but in the bad side, it will also decrease your holeshot BIG TIME!!


You can't go wrong with these mods if your MAIN goal is ACCELERATION hasta luego Ray

[ 05-27-2003, 09:42 PM: Message edited by: Gprracer ]

Gprracer-

You said the 800 grate will decrease holeshot big time. How bad are we talking? I have one ordered from island racing... and now I'm really starting to get worried about this grate. What grate do you recommend then?

SKYSURFER
Your stuck with your 800 Grate and remember I dont want you getting all mad when I am beating you up and down the bay
HOWESTEK
Thanks for the support. I appreciate it.
GPRRACER
Thank you for posting useful information here. I like what you said about the freeflow!
The parts I have ordered from Carl are...
1300Grate
ride plate
PPK-Sealed
Nozzle
14/20-depitched
waveeaterstuff stuff
r&D freeflow
You think this will be a decent gain in acceleration? Thanks. Mike

you might have forgotten one item..

After you install all those performance enhancements on the 1300R you will need a FOR SALE sign for the GP1200. Your repeating everything I've done only 3 years later except you haven't got the For Sale sign yet..

[ 05-27-2003, 09:48 PM: Message edited by: MDKOCHE ]

Sky,

This intake grate (the gp800r) will increase our Gpr boats "prop slipage" big time if you perform any grudge race match with it from a complete dead stop. BRO, THIS IS A SPEED GRATE "NOT" A HOLE SHOT GRATE your out of the hole performance will suffer a lot with this grate, if this is your ridin style my friend i strongley recommend that you call Carl the soon as posible and ask him to change this grate for this one>>>>>>Part number RY22420 in the Riva Yamaha 02 catalog, description: Top-louder Grate for GP 1200R i am sure that he carry both on his shop good luck, Ray

Back in 97 the new GPR hull (basic copy) was used as Yamaha's race hull instead of the 97 consumer GP1200 hull. That essentially is how the GPR hull made it to production for the general consumer.

Gprracer- Thanks for the advice... looks like i need to call Carl tomorrow! Hopefully it won't PlSS him off! I knew the 800 grate would have an affect on holeshot, but I didn't know it would have a HUGE affect. The 1mph gained on the top end won't matter as much if the hook up lags and the holeshot suffers...

NJGp1200- I got a garmin GPS new off ebay tonight. It's the Garmin 72. Hopefully I will get it before this weekend that way I can GPS my 1300 before it goes in to Carl. If the weather is nice this weekend, you should come on over to the river and we can do some speed runs.

Quoted: GPRRACER, you think this will be a decent gain in acceleration? mike

Mike, i take a close look at your "soon to be installed" mods and they look "good" on my book "but" they are "NOT" the ultimate for acceleration to achieve this you would need the HEAD and the 13/19 set back and this two parts (are missing in action here) REMEMBER you are askin me about my opinion on the "ultimate" acceleration set-up "NOT" about the ultimate top end speed set-up. To put this very clear to you ultimate holeshot set-up means to me the best 0-60 times for this i pick the (Riva head and 13/19 set back combo) for the ultimate "top end speed" set-up i will choose the head and the IR solas 14/20 depitched I cut prop hands down

P.S. Mike, board member MDKOCHE can give you some more input on this, he just raced another board member Gpr boat with almost the same set-up as him except for the prop (mdkoche boat was using the smaller 13/19 and the other boat was using the bigger IR I cut 14/20 depitched to a 11/17.

[ 05-28-2003, 12:05 AM: Message edited by: Gprracer ]

GPRRACER
Thanks for the info.
1 More question, I guess with the EFI controller and the powercore, and flame arrestor could only be even better for acceleration and top speed collectively. Probably a dumb a$$ question, but I guess they could be my next mods down the road I could do in addition with the head.
MDKOCHE
The more and more I see your posts, your like a freakin encyclopedia of Yamaha Knowledge. Wish you were on my block.
Well I'd probably be broke then cause I would be so pumped to make this thing silly fast.

I would like to add a little info here:
The 800 grate would be more for top end compared to a 12/13 grate--- BUT---on a 13 it reacts differently than on a 12 and the immediate holeshot isnt affected as much as you would think--The 13 has the 2" setback in the pump which holds more "stored" water before the pump and DOESN'T clear out as fast as it would on a 12-- dont forget the 800 is still a "top-loader" by design. This is one area where a decision has to be made.
As far as impellers--- this is another area where ne would have to make a choice--- on stock motored 13's we have set up some with depitched 14/20's, some with our PRO 13/19( similar to RIVA SET-BACK) and some with different cuts. While either choice will give you better holehot and top over stock, The 13/19 based impellers would be the better choice for those looking to maximize holeshot but will fall short of the 14/20 based impellers up top.
Once motor work is performed there will be enough power to pull the 14/20 based impellers down bottom with excellent holeshot.

Thanks for the info Carl!

On a single piped GPR, I have found that the 800 grate woke the boat up with a depitched 14/20. I know it would have been too much slippage with the 13/19 though. I think it depends a lot on th etotal setup. But after racing closed course and doing lots of holeshots, The stage II GPR1200 and the setups I am seeing so far for the 1300r will benefit from the 800 grate. JUST DON"T USE IT WITH A TRIPLE!!!

Carl-

Thanks for the post. Looks like I won't be needing to give you a call then! I'll stick with the 800 grate.