Kawasaki Forums

Carb Air Cutoff Valve Question

Calzx — Sun, 17 May 2026 21:30:14 GMT

Anyone have info on whether the air cutoff valves on a 2004 ZRX 1200 can be eliminated and sealed off & if so, what did you do and did it make any difference? Thanks

Carb Air Cutoff Valve Question

Calzx — Sun, 17 May 2026 21:27:11 GMT

Anyone have info on whether the air cutoff valves on 2004 ZRX 1200 can be eliminated and sealed off & if so, what did you do and did it make any difference? Thanks

Clogged pilot jet Hack

Brieninsac — Fri, 15 May 2026 18:13:36 GMT

I've been a very bad boy! I've been neglecting my KLX250S and let it sit for at least a year in a half without riding it. I know, I know� and yes, I definitely know better.

A couple months ago I noticed a puddle of fuel on the floor, so I already knew what was coming. But it wasn�t until gas prices started skyrocketing that I finally decided to address the issue so I could start riding the bike more often again.

After topping it off with fresh gasoline and some fuel cleaner, I got her running again� well, for a few weeks. Then last week I went to ride again and the bike wouldn�t idle. Ugh. The thought of removing the carburetor and cleaning it was not something I wanted to deal with.

While researching fixes, I stumbled across a really cool video on YouTube. This was probably the easiest fix for a clogged pilot jet I�ve ever seen.

Here are the steps:
1. Turn the fuel off at the petcock.
2. Move the bike out to the driveway because this hack is messy.
3. Put a large bowl under the fuel lines.
4. Loosen the screw at the bottom of the carburetor a couple turns.
5. You�ll probably see some fuel start dripping out.
6. Disconnect the fuel line from the petcock to the carb.
7. Use compressed air to blow through the fuel line. I used about 80 PSI. This blew all kinds of crap out of the carb.
8. Button everything back up and reverse the steps.
9. If it still has issues, do it a second time.

To my surprise, it worked perfectly. The fuel that came out had quite a bit of debris in it. Fired the bike back up afterward and it ran smooth as ice.

Kawasaki Ninja 250r 2008 EX250K (EU EFI) - stalling, hunting idle, hard to start - no

Django — Wed, 13 May 2026 11:32:25 GMT

Hi all,

Just bought a 2008 Kawasaki Ninja 250R, EU model (EX250K8F, so the EFI/DFI variant � Keihin TTK28 throttle bodies). Looking for input on a starting and idle issue before I dive deeper.

Bike info:

2008 EX250K8F (EU EFI version)
31,500 km / 19,600 miles
Bought used 5 days ago
Previous owner said it hadn't been serviced for ~2 years, didn't know when the owner before him serviced it
Sat for periods between rides per the owner. Had been sitting in winter storage until a couple of days ago when he drove it to my house.

Symptoms:

Hard cold start � multiple cranking attempts needed
When it does fire, it dies almost immediately unless I keep the throttle slightly open
Idle hunts wildly between ~500 and ~3000 rpm, never really settles
Dies on its own at stops or after a short time at idle
Once warm and if it is held revving, it runs (haven't pushed it hard yet)

Before I dump what I've already tried � based on these symptoms alone, what's your gut reaction? Would love to hear what experienced 250R folks suspect before I bias the conversation with my own theories.

Important context: Seller rode it to me on delivery day (so it was already warm when I test rode it) and it ran fine during the test ride. Two days later, cold start from my garage � all the issues showed up.

What I've tried so far:

Read the service manual self-diagnosis procedure
Located the Y/BK self-diagnosis terminal under the seat
Removed the dummy plug
Grounded the terminal to battery (�) with a wire
Tried both Dealer Mode 1 (current faults) and Mode 2 (history)
No response from FI indicator at all � no codes, no constant light, nothing
FI lamp does behave normally at ignition ON (lights briefly, goes out)
Fuel pump prime is audible at ignition ON

Per the service manual: "When no service code is displayed, the electrical parts of the DFI system has no fault, and the mechanical parts of the DFI system and the engine are suspect."

So I'm reading this as: probably mechanical, not electronic. But I'm also not 100% sure I did the self-diagnosis correctly � getting literally no response at all seems odd.

My planned next steps:

Full basic service: oil + filter (HF401), spark plugs (NGK CR8E x2), air filter (HFA2505)
Throttle body cleaning with carb cleaner
Vacuum leak test around intake boots (spray cleaner around intake while idling)
New fuel, in case the gas is old
Brake fluid and coolant change while I'm at it (overdue)
Then re-evaluate

Specific questions:

Does this sound right as a starting plan, or am I missing something obvious?
Any common gotchas on the K-variant specifically? (Lots of J-variant advice online, K is harder to find)
Was I doing the self-diagnosis procedure correctly? Anything I might be doing wrong since I got no response at all?
Subthrottle valve actuator / IACV issues � these symptoms seem to match, but I have no codes to confirm. Worth focusing there?

Thanks in advance � appreciate any input!

454 ltd ignition

rick2175 — Wed, 13 May 2026 06:39:17 GMT

looking for the cdi, coils, exhaust and radiator. I dont think the year is important. using engine for another project.

454 ltd ignition

rick2175 — Tue, 12 May 2026 20:27:21 GMT

Hey all. S I bought a 454 ltd engine and am finding parts hard to find. I am in need of almost everything ignition wise. CDI, coils, etc. also exhaust and cooling. I am trying to put this into a buggy. I have been looking on marketplace and eBay for parts, but they are slim. Are there other alternatives for ignition parts? I can fabricate an exhaust and modify a radiator for it I am pretty sure. I bought new carbs already. Just gotta figure out the ignition stuff. If anybody knows of anything that might help, I would really appreciate it. Thanks in advance.

need a air cleaner

MNMike — Sun, 10 May 2026 12:31:08 GMT

So a mouse ruined the air cleaner to my 1970 Kawasaki F4 Sidewinder, and I can't find one on EBay.

Do any of you know if there is a replacement part for Kawasaki part 11013-011 ?

Thanks in advance,
Mike

03-05 KX125 Motor Low Hours

Imagine — Sat, 09 May 2026 01:39:28 GMT

Built mini bikes and go karts and always meant to do something with this. Time to let it go. Asking 500 comes with the original carb and cdi. Southern California.

New Member

Bacchan — Thu, 07 May 2026 08:22:33 GMT

Hi all. Names Giulian. I have a zx6r which I'm in the process of sorting out as it's been sat for a couple year, 2002 j1 model. I'm definitely going g to have many questions.

early 90's mule, 2010 model with gas engine

mike.s. — Wed, 06 May 2026 20:30:06 GMT

been sold, dont know how to delete this ad.

I'm Stumped

corkman — Tue, 05 May 2026 16:15:10 GMT

I have a 2001 and 2003 Kawasaki STX 900 jet ski. They are both a WIP. I'm trying to get one working and cannot for the life of me figure out what the problem is. Hopefully one of you smart people out there can help me.

On the 2001 I got it running on only 1 cylinder, #3. I can remove the plug wires on cylinders 1 and 2 while running and nothing happens. I remove the plug wire from cylinder 3 and the jet ski stops. Here's what I tried so far:

1. cleaned the carbs - no change

2. Switched the spark plugs around - no change

3. Swapped carbs with the 2003 - no change

4. Swapped the electrical controller box with the 2003 - no change

5. Sprayed starting fluid down 1 and 2 while running - no change

6. Checked the compression: 1 was 90, 2 and 3 were 100 psi

Any ideas?

Thanks in advance

Bill

USN Retired

PS: I don�t know which cylinder is 1, 2, or 3, but I don�t think it matters as long as I am consistent. I just counted across the top: 1,2,3.

mule 2010 engine question

mike.s. — Tue, 05 May 2026 14:50:23 GMT

test...test

Harmonic interference?

pfrancis — Sun, 03 May 2026 15:43:42 GMT

Hi Guys
I am not sure if anybody has experienced this. On my 1999 Kawasaki drifter 800, when running on the highway, I seem to get a gentle vertical vibration every 100m or so. this starts at about 60kph. As I go faster, the vibration seem to occur more often. It is like a harmonic interference like happens to a ventilator at certain speeds. It is not a wobble and not dangerous, just a little concerning as to what it is. Wheels have been balanced twice (they tell me).
Any advice is welcome.

2010 klx250s no dash power

LPpro — Sat, 02 May 2026 19:15:29 GMT

Hey I have a klx with no dash power! I turn the key and absolutely nothing happens, I can start the bike if I use a jump wire from battery to solinoid, but it will shut of around 10secs after removing the jump wire, iv checked the fuse and it�s good , the ground wire looks fine, if anyone can help would really appreciate cheers

2007 KLX 250s Dynojet 2152 questions

Timtom — Sat, 02 May 2026 14:58:18 GMT

Hi,
I am going to rejet my 2007 KLX 250s with Dynojet 2152 kit.
I will keep the stock exhaust and I live and ride between 5000 and 9000 feet.
What main jet and needle settings should I start with if I want to go lidless?
Should I replace the pilot jet?

Thanks in advance!
Tim