Kawasaki Ultra 250/260/300/310 Performance, Maintenance, and Information Database

[smokeysevin]

Sean, maybe you can see if you can dig up some of my old threads that were hidden a while back?

Will do.

Sean

[150ofUltra]

Just wanted to say that these two links don't work.

1. Ultra Ram Air Hood Mod
2. Ultra Heat Extractor

After riding with some others that have supercharger skis. I'm looking at all the details before buying. I'm on the fence about an FZR or 310.

[jetdave56]

Just wanted to say that these two links don't work.

1. Ultra Ram Air Hood Mod
2. Ultra Heat Extractor

After riding with some others that have supercharger skis. I'm looking at all the details before buying. I'm on the fence about an FZR or 310.

Before you toss and turn in your sleep trying to decide which ski what type of water do you ride in,both skis hit hard on acceleration as the 310 for rougher waters the FZR for lakes and river trails,other variables are gas consumption ,storage space,speed potential ,towing tubes etc etc...

[kawasaki9]

This thread is an index of numerous threads that have been posted by our members, the purpose of which is to help answer questions of people who are new to the site, the Ultra platform, or PWCs in general. If you are looking for the Ultra LX (naturally aspirated) or the STX please see this thread.

This index will be updated from time to time with new threads and is broken up into the following groups.

Basic Maintenance

1. Initial Setup
2. Post Ride Care
3. WATER INGESTION
4. Oil and Oil Filter
5. Spark Plugs
6. Exhaust Filter
7. Cooling Hoses
8. Intercooler
9. Supercharger and Supercharger Belt
10. Jet Pump and Impeller

Performance and Mods

1. Hull and Seat
2. Pump and Impeller
3. Handling Components
4. Engine
5. Fuel System
6. Supercharger
7. ECU and Speed Limiter Bypass
8. Intake and Exhaust
9. Top Deck and Controls
10. Electrical and Bilge Pumps
11. Race Mods and Rules

Extra Information

1. 250/260 Information
2. 300/310 Information

[ATTACH=CONFIG]326350[/ATTACH][ATTACH=CONFIG]326351[/ATTACH][ATTACH=CONFIG]326352[/ATTACH][ATTACH=CONFIG]326353[/ATTACH][ATTACH=CONFIG]326354[/ATTACH]

Basic Maintenance

1. Initial Setup
2. Post Ride Care
3. WATER INGESTION
   1. Ultra Water Ingestion Repair

1. Oil and Oil Filter
2. Spark Plugs
   1. Ultra Spark Plug Torque
3. Exhaust Filter
4. Ultra 250/260/300 Update for Ultra 310 Exhaust Filter Retaining pin by Nicjak
5. Tips on Ultra 300/310 Exhaust Filter Replacement or 250/260 Upgrade

1. Cooling Hoses
2. Intercooler
   1. Ultra Intercooler Cleaning

1. Supercharger and Supercharger Belt
   1. Ultra 300 S/C Oil Spec
   2. How To Change Your Ultra 300 SC Belt

1. Jet Pump and Impeller
   1. Ultra Jet Pump Removal

Performance and Mods

1. Hull and Seat
   1. Ultra Ram Air Hood Mod
   2. Ultra Heat Extractor
   3. Ultra Seat Discussion

1. Pump and Impeller
   1. Ultra 250 Impeller (155 mm)
   2. Ultra 250 Pump wedge (155 mm)

1. Handling Components
   1. Ultra Reverse Lever Latch Mod
   2. Ultra Riva Sponsons
   3. Ultra Intake Grate and Ride Plate Comparison
2. Engine
   1. Ultra Timing Mod
   2. R&D 250X + LX Crankcase Vent Kit Instructions
   3. Ultra 250 Oil Contamination Management System

1. Fuel System
   1. R&D Extended Fuel Pickup

1. Supercharger
   1. Ultra 250/260 Pulley Match Up
   2. DIY Ultra Belt Holder
   3. Ultra 250 OEM BOV Mod
   4. Ultra 250X Intercooler Mod
   5. R&D 250X Pulley Kit Instructions
   6. Intercooler Maintenance and Cleaning
2. ECU and Speed Limiter Bypass
   1. Riva Speed Control Override Module on 300x
   2. Do not use the washer mod... Seriously, don't.

1. Intake and Exhaust
   1. Ultra 250/260 Boost Hose Rubbing
   2. Ultra 250/260 Offshore Intercooler Water Line Rerouting
   3. Ultra 250/260 Riva Pro Air Intake
   4. Ultra 250 Riva Free-Flow Exhaust 2007
   5. Ultra Riva BOV and Relief Valve Bypass Filter
   6. R-Rated Ultra 250 Air Intake
   7. Ultra 250/260 Riva Complete exhaust 2008

1. Top Deck and Controls
   1. Handle Bar Extensions
   2. Budget Ultra Steering
   3. Ultra UMI Steering
   4. Ultra 250 Hydrotoys Mods (Grip Install, Pelican Box Install, and Reverse Lever Mod)

1. Electrical
   1. GPS and Bilge install on Ultra
   2. Depth Finders; What Type/Brand Works Best For You?
   3. Battery Tender and 12v Plug Install
   4. Ultra 250 Bump start mod
   5. Stealth Mode - "Blow Hole" Bilge Discharge Ports
   6. Ultra 300 Bilge Pump and Switch Install

1. Race Mods and Rules

Extra Information

1. 250/260 Information
   1. Ultra 250 Recalls and Tech Info from Kawasaki

1. 300/310 Information
   1. 2012 vs. 2013 vs. 2014 Ultra LX changes?
   2. 2013 Ultra 300X & LX Improvements
   3. 100 Hour Ultra 300x - Owners Experience

Hope that helps y'all out, I will try to keep this up to date. If you have something you want added or altered please send me a message and I will do so. I also would like to remind everyone now that most/all of this information is in the Kawasaki Tech Tips and Info section and it also where things like instructions, guides, and generally important recurring information should be posted. If you have something to offer, post it up and if its good, I will sticky it and make it a part of this. I am also looking for reviews and opinions on parts, mods, and general reviews of our craft.

Remember, this section is only as good as what we share and your experiences can help others learn or not make mistakes.

Sean

Great work mate , thanks for your time and input

[smokeysevin]

Links updated, I am not sure what happened, some of them contained and extra http:/ at the front which was causing the issue. Please post links or suggestions for additional information.

Sean

[CaviTATOR]

I have a pdf copy of the service manual for the 300x/lx. how do I put it on here?

[lasportsmn]

I have a pdf copy of the service manual for the 300x/lx. how do I put it on here?

You don't. That is copyright infringement and illegal it will be deleted.

[rivet1]

I bought a New 2014 310X SE. It has 13.5 hours on it. Two days ago I rode it on a calm water lake. It had 12.5 hours and it was the first time to run it at full throttle. The ski would only do 57-59 mph and tach 7000 of 8000 red line rpm. At full throttle it 57mph the boost was reading 9-11. I shone a light into the pump and intake which were both new condition, no damage. Running 91 octane, ethanol free Shell gas. Is anyone familiar with this issue or having any suggestions.
Thanks

[DH300]

Sorry to tell you, but your ski needs a new ECU. the early '14s had a problem that would pull them back to about where you are. Some people have gotten a free one from their dealer. People with first-hand experience can help you more on this.

[rivet1]

I just read some of the older posts addressing this issue but no links or solid info on recalls. The dealer should have been aware of the problem. I asked before I wrote out the check is there any problem areas with this model. I called two dealers today and neither one seemed well versed with this problem. Hate to say it but my 2014 Yamaha 1100 VF Deluxe at a measly 110HP is just as fast top speed as this Dog. Having never ridden any other Kawasaki 310X would it be fair to assume this ECU problem is reducing power thru out the entire power band? Everything I've read says the 310X is the hardest accelerating stock machine out there. I hate to see second or third. If this is the best it can do I want my money back.

[DH300]

I just read some of the older posts addressing this issue but no links or solid info on recalls. The dealer should have been aware of the problem. I asked before I wrote out the check is there any problem areas with this model. I called two dealers today and neither one seemed well versed with this problem. Hate to say it but my 2014 Yamaha 1100 VF Deluxe at a measly 110HP is just as fast top speed as this Dog. Having never ridden any other Kawasaki 310X would it be fair to assume this ECU problem is reducing power thru out the entire power band? Everything I've read says the 310X is the hardest accelerating stock machine out there. I hate to see second or third. If this is the best it can do I want my money back.

It is extrwmely quick out of the hole in good shape. The ECU might not be your issue if it feels sluggish to that 57 mph. Especially sluggish enough to be compared to a VX110. Lol. I think the guys with the issue said it pulled hard to normal top speed and then pulled back down to 59-61. Check for boost leaks.

[sirbreaksalot]

I just read some of the older posts addressing this issue but no links or solid info on recalls. The dealer should have been aware of the problem. I asked before I wrote out the check is there any problem areas with this model. I called two dealers today and neither one seemed well versed with this problem. Hate to say it but my 2014 Yamaha 1100 VF Deluxe at a measly 110HP is just as fast top speed as this Dog. Having never ridden any other Kawasaki 310X would it be fair to assume this ECU problem is reducing power thru out the entire power band? Everything I've read says the 310X is the hardest accelerating stock machine out there. I hate to see second or third. If this is the best it can do I want my money back.

it OBVIOUS your ski has an issue, because a vx110 yami is the slowest ski on the market !!!!!!

.1 its crapped the exh filter due to previous owner never clearing the waterbox ( not the skies fault )
.2 its got a blocked fuel filter ( not the skies fault ) people using cheap shitty fuels
.3 you using learner key
.4 the throttle is not going 100% throttle
.5 you have a fish in your intercooler
.6you have a major boost leak

thats just for starters, either way SOMETHING is not right, because it impossible for your Yami to be even close to a correctly running 310x

Waz

[rivet1]

Rode my 2014 310X SE 2 days ago with Go Pro camera. I did a series of full throttle runs. Each time the ski would accelerate up to a max of 61.The max rpm varied between 7100- 7600. Each run as the ski went thru about 58 mph the boost pressure would drop from aprox 15 to 9-11 along with the rpm. The next day I took it, to the dealer with the video. They called the hotline and called me about an hour later said the ECU was bad and new one will be in early next week. If you have the same problem I suggest shoot a video that they can see the parameters. Saves them a huge amount of time. I''ll be back on the water by mid week and follow up on how it runs.

[jefski520]

Very good post and info here. I will be pursuing some mods for my 250x. I would like to get a 300 or 310, but not in the family plan right now.

[benjahw]

Mods to do for your 250x are preventative mods and free simple mods.

*You need to upgrade (if you have not already) your pump bearings.
*You need to change oil every 25 hrs (Gas in oil)
*Always check for proper supercharger tension with Specific tool.


Mods
*Add washers to seat platform to allow air to vent into the hull.
*Riva plate for top speed on glass
*4 degree timing mod (dremel timing wheel) use 93 octane
*Remove and block off BOV
*Cut relief valve hoses from airbox. No reason to suck in hot air into intake
*There is a simple Intercooler mod that will lower temps. House reroute.

Sorry I dont have pictures or links but this will get your head spinning. What did I miss?