2021 Yamaha GP1800R SVHO vs. 2020 GP1800R SVHO: The Watercraft Journal, Ep. 81

[@gocrazy1995PYRONATION]

Thanks for making me need to take off my limiter to make my 2020 feel like a 2021 lol

[@watercraftjournal]

Happy to help! LOL!

[@marktripi1791]

Would love to see something on the 2021 GP 1800 HO , I bought one but have wait till May to ride it. I live in the northeast .

[@watercraftjournal]

Sounds good!

[@Spooling123]

What are the differences between the 2020 and the 2018 that make it so much faster? Is it just the intake grate and ride plate? Does it have the same impeller?

[@watercraftjournal]

Read the article linked in the description. We detail everything.

[@johncunningham5321]

I'll have to wait for a 2022 in eastern Canada, yamaha pre sold all of them , you had to be on a "list" and dealers cannot get any more . Im on the new list with deposit in hand , any word on improvements

[@watercraftjournal]

Dang that sucks. Sorry to hear that.

[@LifeBeginsOnTheWater]

Great job guys once again, I appreciate all the hard work that goes into making & putting together these videos. Looks like Yamaha knocked it out the ballpark!

[@watercraftjournal]

Thank you very much! Yeah, the results are incredible.

[@alpicosito621]

@@watercraftjournal guess I need one now. Lol. This will go well with my FZS

[@anthonyregan9957]

Great job guys keep up the good work... how about a rxp & rxt shootout ..

[@watercraftjournal]

Great suggestion!

[@davidkrizauskas4993]

Did you guys use the new launch control/mode on the 2021 for this test? Or just raw launch?

[@watercraftjournal]

As detailed in the article linked in the description (with MUCH more detail), yes we did - and unlike our Sea-Doo vs. Yamaha shootout, we fared better numbers without the Launch Control feature, and used those.

[@drakebusinelle9529]

Are y’all from Louisiana? Looks like the bayou teche behind Cameron in berwick

[@watercraftjournal]

Jerry Gaddis and his son Greg are from Morgan City. Kevin lives in Nashville.

[@glpower5965]

how abou 2023 gp1800r ho how much faster is the svho is it significant?

[@watercraftjournal]

Yes it’s significant.

[@alhit007]

Great video lads 👍🇺🇸 a bit off topic Kevin but any sign of a video on the RXTX. In take grate comparison?

[@watercraftjournal]

Unfortunately not. The supply chain for parts has really derailed that video.

[@FLJBE]

How many hours should a ski have before stage 1 tune?

[@watercraftjournal]

Please see Kevin's most recent Live session for tuning tips. He details this exactly.

[@wadesteven4270]

This was just a great video. I like when channels collaborate. It makes for outstanding content.

[@watercraftjournal]

Jerry and Greg partner with Kevin often.

[@ParrotHead1980]

Hey Kevin, do you guys think you could test the 2021 GP1800R vs the 2021 Seadoo RXT 300.. :) see who is faster. This should be a revenge test for yamaha since your last test done in 2018.

[@watercraftjournal]

Unlikely. We have the numbers from the RXT-X 300 - performance hasn't changed. We'll have true VBOX numbers from the RXP-X 300 soon enough and do an article comparing all of these numbers together.

[@ParrotHead1980]

@@watercraftjournal If you look at the 2018 seadoo RXTX300 numbers and compare them to the new 2021 yamaha GP1800R, the GP1800R spanks it by a full second from 5-60 and 5-40. :)

[@watercraftjournal]

Oh yeah, we know. But, there's an extra few pounds added in the larger fuel tank and our new lighter rider. Lots of variables to consider - but our money is still on the Yamaha this year.

[@ParrotHead1980]

@@watercraftjournal Sweeeet!!

[@andrewsauter4101]

Great video . Performance numbers are purely based on the conditions of the day. Watched your video on the 2018 Rxt 300. I have a 2020 300 bone stock and have the same type of gps based recording box as the vbox. Best I've gotten so far is 3.2 seconds 5-60. You can definitely can stronger numbers out of the rxt then in your last vid .

[@watercraftjournal]

Hmm. Doubtful it's the conditions, as they were near identical. Vbox is the single-highest rated accelerometer on the market. It's not a GPS.

[@bigjwilkins]

Wow the 2021 lineup sure looks strong!

[@watercraftjournal]

It’s impressive for sure!

[@costasgeorgiou5015]

Have the fx svho has gotten that much faster over the last few years also? Since we aren't talking in turns just straight line should so the same difference rite?

[@watercraftjournal]

No, not exactly. The 2019+ hull of the FX is a faster, more precise design (that is, once you replace the drag-inducing ride plate with a RIVA plate). And yes, we ARE talking turns. The new FX design has proven itself on both the open ocean and closed course in recent years. If you are asking in regards to pure acceleration between the 2019+ and the 2012-2018, there's been quite a few changes to give the latter version the lead (although we do not have hard numbers).

[@costasgeorgiou5015]

@@watercraftjournal is it even a contender to the gp1800r svho that is the fx svho in the number you were doin in this video or does the 1800 walk it. I am aware of its proven performance but is it comparable to the one in this video since the weight is that different. I always go with the fx series cause I ride alot in rough water and I know it's better in that sense like waaay off shore.

[@watercraftjournal]

Go with the FX and don't worry about it. These tests are all done on GLASS inside of a freshwater overflow, so you won't encounter anyone replicating these speeds out on the ocean anyways. Get the FX and love the hell out of it and stop worrying about fractions of a second in acceleration.

[@costasgeorgiou5015]

@@watercraftjournal I'm not buyin now was just wanting to know the difference frome the 18 fx to the 20 and the 21 fx svho to see if I would need to upgrade the few times I have been on glass it was bouncing off the rev limiter(I know not good) but I get a 72.4 mph top out before realing back on GPS.sorry if I confused you.

[@bencastleman7982]

Well I feel crappy owning a 19’ GP1800R any advice on a few modifications?

[@watercraftjournal]

LOL, why? Are you a diehard drag racer? Is there money on the line? Pfft! Enjoy the heck out of your ski. This video is literally splitting hairs.

[@Croozzen]

Why didn't you line them up side by and give them a run... just to show the difference in a physical form...???

[@watercraftjournal]

Because that’s the single least scientific way to conduct an acceleration test. We used the same rider for all passes.

[@mattpittman2694]

I would like to see a 17 with riva plate and intake. I wounder how much the 155 to160mm affects the performance.

[@watercraftjournal]

Mind you, the '17 is pretty much the '19 with the parts you listed. Machining the transom out has been a key trick for racers, so it's pretty considerable.

[@carlcondon5805]

NICE REVIEW GUYS. KEEP IT UP.

[@watercraftjournal]

Thank you, Carl! Please LIKE and SHARE to help grow the channel!

[@GBsPitstop]

Awesome

[@watercraftjournal]

Yeah!

[@DZOElPortavoz]

I recently sold my 2015 fzr would you say this new gp2021 is a better ski performance wise, for I just think the fzr is a better looking ski than the gp but the gp 2021 is winning me over

[@watercraftjournal]

We loved the FZR, it's looks were stellar - but yes, the '21 GP1800R out performs on every level.

[@ericsmith6677]

i like the graphics on the 2020 better wish yamaha would do more bright colors other than easter egg colors

[@Jetskiracingchannel]

Can y’all do a 2021 rxt vs 2021 rxp and a 2020 rxp and a 2021 rxp vs a 2021 gp

[@watercraftjournal]

Logistically, it won't be possible.

[@Jetskiracingchannel]

@@watercraftjournal why is that

[@watercraftjournal]

For us to properly corral 6 comparable units that are of equal hours and not modified is a logistical nightmare.

[@Jetskiracingchannel]

@@watercraftjournal well not all 6 at once Just compare them individually. I have my own racing channel. I have a stage 1 RXT and my gf has a stock RXT and stock rxp if I could get my hands on a 2021 rxp or gp1800 I could make some great racing videos

[@watercraftjournal]

Again, to properly and scientifically compare all 6, it must be at once to replicate perfect environmental conditions. Anything less is an incomplete or erroneous test.

[@ParrotHead1980]

Great review and comparison Kevin. Amazing the lighter 2020 GP1800R got beat up by the heavier 2021 GP1800R. Looks like a full second faster makes a big difference. Better intake grate and moving the gas tank back alittle made a huge difference. Love the changes yamaha made. Now you should compare the 2020 yamaha GP1800R H.O vs the 2021 Yamaha GP1800R H.O. top speed test and acceleration. :) :)

[@watercraftjournal]

It's a very minor weight difference, but it's all about reducing cavitation and weigh distribution.

[@ParrotHead1980]

@@watercraftjournal . I would be interested to see how the new 2021 GP1800R stacks up against the new 2021 seadoo RXTX 300 in a acceleration and top speed test. 🤘🤘

[@benhurrey7928]

Getting popcorn and waiting for the SeaDoo fan boys to start whining that their RXPX is faster....

[@watercraftjournal]

Well, all you need to do is look back at the RXT-X 300 number we recorded 2 years ago...

[@tiggietiggie6095]

Well that comment aged well 🤣

[@michaeljones2880]

Not a accurate comparison with the 2018 GP1800 as it had the heavier rider on it during testing

[@watercraftjournal]

Possibly, but that's still splitting hairs.

[@dragshotking7776]

StiCknG with my class😎

[@watercraftjournal]

Which is?

[@dragshotking7776]

@@watercraftjournal Yamaha. SeaDoo came up with good options , especially the RXP-X. Very good ride, especially how it hooks in the water and good thru the chop. Like the Purple, but Yamaha alwayz findz a way. There is just some about it. Like what you guyz do. Keep it up!!!

[@watercraftjournal]

Thank you! Please like and share to help us grow the channel!

[@tracyenlow8344]

You have to take into account that the 1 sec shaved off from the 2018 to the 2021 was largely due to a 90 pound lighter test rider.

[@watercraftjournal]

Possibly. Jerry will have RXP-X 300 numbers shortly.

[@watercraftjournal]

Hey Tracey, Kevin here. No it wouldn't, because per this reasoning, the '18 GP wouldn't have cavitated as badly. More weight means better bite (why the '18 RXT-X fared better out of the hole). The '21 is able to launch demonstrably harder due to improvements made to the pump, intake grate and ECU.

[@stevenorta7565]

Ever seen that movie twins with D Davito & A Schwarzenegger?🤣

[@watercraftjournal]

LOL!

[@Chaseponder]

Should easily edge out the 21' Sink Doos 300

[@watercraftjournal]

We haven't done the acceleration tests with the new RXP-X, but this definitely walks away on the numbers we recorded on the '18 RXT-X 300.

[@tiggietiggie6095]

How did that workout for you? 😂

[@Steven-xj2rf]

Sounds like I have a healthy 2020. I got 1.44 from 5-30 and 3.66 from 5-60 at 4000+ feet in 60-degree weather and 3/4 tank of gas with a heavy rider.

[@watercraftjournal]

Good to hear!

[@Steven-xj2rf]

@@watercraftjournal- it was a frustrating process as I had runs all over the place and was thinking how easy you guys make it look. I ended up focusing more on my weight distribution than trim settings in the end. (I used dragy instead of VBOX)

[@04tsxpower]

Green hulk?

[@watercraftjournal]

Yes, we conducted this with Jerry and Greg Gaddis of Greenhulk.net.

[@04tsxpower]

@@watercraftjournal thx thought so....great videos

[@scotttabak6755]

Gerry weighs about 230lbs shoulda let him give it a wirl

[@watercraftjournal]

Jerry weighs just over 240 and had extensive back surgery last year. Kevin weighs the same but was on the water filming.

[@maklegend9771]

What is better the rxp x 300 or the gp 1800 r svho

[@watercraftjournal]

In what regards? Storage? Paint quality? Ergonomics? Price?

[@evanleo7633]

My explanation is Yamaha added horsepower to GP over the years, Yamaha never disclose their horsepower on their GP model, when gp1800r first came out people gueestimate about 250 horsepower and gp got more than a second faster over 3 years and I think it now has about 320-350 horsepower which make sense since Yamaha has the biggest engine in the industry

[@watercraftjournal]

Sorry, no. The BHP (brake horsepower) has remained 255 since its inception. The difference is improved traction/hookup, superior power-to-weight ratio, and less clutch slippage. It's really very simple - it's not about having MORE horsepower, it's about using it better.

[@evanleo7633]

@@watercraftjournal thanks for the information! Is the 255 official number?In my humble opinion, I take their HP with a grin of salt, their engine size cylinders and force induction all vary not to mention torque, I think other than lightweight the GP being the fastest machine also thanks to the biggest engine

[@watercraftjournal]

It's not OFFICIAL because Yamaha hasn't released an OFFICIAL number. This is the brake horsepower number recorded on RIVA's engine dyno replicating the same air and water temperatures required by the USCG. Kevin has copies of the dyno charts he cannot release.

[@evanleo7633]

@@watercraftjournal thank you for the information! What is the dyno number on Kawasaki and seadoo BTW?

[@watercraftjournal]

Hey Evan, Kevin here. I've got dyno numbers directly from Kawi and BRP for those - and they're almost dead nuts on the money: 309.4 and 300.1, respectively.

[@Tyler_Bass850]

could have taken the air box cover off and the seat off and got better numbers out of both lol

[@watercraftjournal]

But that wouldn't be HONEST.

[@Tyler_Bass850]

@@watercraftjournal a tune and exhaust wouldnt be honest

[@watercraftjournal]

Nor did we do that.

[@Acula33RC]

I want to see a comparison between a guy laying down on the seat like this guy, vs. Someone in a seated aerodynamic position. I understand the idea of laying down on the seat buy legs flopping around cant be that much more aerodynamic.

[@watercraftjournal]

Greg's legs weren't stretched out behind him. Look closer.

[@jetpilotno9]

燃料零しすぎだろ

[@watercraftjournal]

Great!

[@clutchitup8565]

Jesus christ learn how fill the gas

[@watercraftjournal]

The point is to show that it’s full.

[@puscifer03dude52]

God damn. Show us racing them. So much click bait

[@watercraftjournal]

Drag racing doesn't prove shit. Too many variables in a heads up race.