Had my 1300r out today in the bay and was able to find a race. Came across a 98 GP1200 with 154 hours on it, completely stock. Had me by inches off the line, but was no match midrange to topend. Just thought I'd post this since I have been less then supportive to my 1300. Ofcourse ole reliable here(99GP1200) will never allow the 1300 to beat it short distance!
P.S. The TDR Waterbox is a thumbs up as far as I'm concerned. Didnt lose anything topspeed judging by the dreamometer which has been reading 78mph. , but I can feel a difference in the midrange area. As far as sound goes it is not overloud like I thought it might be. It still needs the freeflow and the cat to be ripped out. I'm sure it will be screaming loud then, but my 991200 with the TDR on it, is much louder.

rhino-

the pump plug kit and sealing the pump will enhance reliability. a new impeller and 87mm pump will have absolutely no affect on reliability. you will also want to put on http://waveeaterproducts.com clips and couplers on the powervalves.

typically once you start messing around with engine mods is when you can sarcifice reliability. you have to know what you are doing or else you can do damage. keep in mind that engine mods will also void your manufacturers warranty.

mike- i'm in love with my 1300! running a constant 64.5 on the GPS. i can't wait for MODS!!!!

There is no doubt in my mind that the current World Record Holder Speed of 87.5mph will fall within a year. Whats funny too, is that instead of spending $50,000 like that Daddy Warbucks did, its only going to take about $10000. Shoooot, I'll just pop on a little 50 shot of Nitrous and go for the record. Freak the 50 shot, lets get silly, do I here 100 shot!!

i here kaboom.

What about the Gas at WOT. I have a 2000 GPR 1200.

I have rode my friends 1300 Stock. Seems to me it uses more gas. Has any one tested the 1300 with a 2000-2002 GPR for gas comparisons

My 1300 gets Awesome gas milage. I figure that the range is at least 50% more than my old GP 12 was. I can go easily 2-3 hours of steady, non stop riding at varing speeds, 4 hours if you were to keep it at 50mph. Any boat will suck up gas if you run it at WOT all the time. My friends RXDI is only slightly better, but look at the performance difference. When I'm riding my 1300, I feel like I am on the best that'a out there.

The world record is not 87 mph, it is mid to low 70's. The boat is capable of those speeds but the conditions the day of the run were terrible. I was told this by a Riva rep at the PWC.

Just put 2 hrs. on my 1300r and absolutely love it. It's my first yamaha jetski and I will never own anything else. It handles so much better than the polaris I had last year. I would like a little more on the bottom end so if anybody has any suggestions. I was going to put stage 2 on but I think I will just learn the ski this year and wait till next year when Im ready for it. I tried the 1200r last year and this 1300 is much faster and rides alot cleaner and I havent even cracked it wide open yet. So glad I went with this ski Im convinced it's the best stock ski of the year after trying the yamaha and beating the sc seatank. My hats off to yamaha.

2quick-

if you want better holeshot, best thing you could do it get a pump plug kit, seal the pump, get the 87mm pump, and a 13/19 prop.

also add the waveeater powervalve clips and couplers. http://www.waveeaterproducts.com they won't add anything to perfomance, but they'll give you some piece of mind!

everything above will set you back under $500 and make a big difference. also, i know my dealer had a deal on the solas 13/19 impeller and the pump as a package. he was selling those two together for $299.