NINJA 250r DEAD HELP ASAP A

[Kingmo25]

Hey so I changed my spark plugs and my ninja 250 ran real good. So I decided to elavate that performance with some love and care by cleaning it’s guts with sea foam. Then it started BOGGING so I was like okay there’s something stuck in the carbs and followed pwn Jones https://youtu.be/ENc8Ssmjyt4 —- and it now doesn’t even start. Can some send me the hose wiring in the carbs and gas tank because I cleaned the hoses but now I don’t know which ones go where. As in from gas tank in particular. I live in PICKERING Canada so the California ones aren’t helpful.

Link to original page on YouTube.

[DannoXYZ]

Hi Mohammed and welcome to Ninjette!

Hmmm, I think this is a case of leaving good-enough alone. Bike is very well optimised from factory and is super reliable when maintained. Just need to fill it with petrol, chain oiled occasionally, engine-oil changed once a year, valves checked every couple years and it should run forever.

• Was there any problems with it beforehand?
• Did you have difficulty starting?
• Does it die when you open throttle from idle?
• How far did you disassemble carbs?
• Did you split them into 2 separate carbs?

There's some diagrams of hose-routing somewhere, lemme see if I can dig them up...

[Kingmo25]

Yea the main problem was it was misfiring a bit.
I just followed the video above.
No splitting

[DannoXYZ]

Try this guide: https://www.ninjette.org/forums/showthread.php?t=307413

1. Note that you don't have California model, there is no T in vacuum-line going to coast-enricher. It should be just one continuous hose.
2. Second vacuum line goes directly to petcock vacuum-inlet
3. vent hose from tank goes down next to shock aimed at ground
4. vent hose from centre of carbs goes back between air-box runners down next to shock aimed at ground

For misfire, you may want to try fuel-system cleaner with strong dose of PEA. More than just jets needs to be cleaned. All internal hidden/secret passages between jets and carb-venturi needs to be cleaned. Basically need to mechanically scrub entire flow-path of petrol from tank to intake-valves.

- Red Line SI-1
- Techron Concentrate Plus
- Gumout All-in-One
- 3M Max Strength Fuel System Cleaner #08814
- Royal Purple Max Atomizer 18000

For real carb-cleaning, you need lots more equipment and lots more elbow-grease:
https://www.ninjette.org/forums/show...7&postcount=11

[Kingmo25]

Originally Posted by DannoXYZ

Try this guide: https://www.ninjette.org/forums/showthread.php?t=307413

1. Note that you don't have California model, there is no T in vacuum-line going to coast-enricher. It should be just one continuous hose.
2. Second vacuum line goes directly to petcock vacuum-inlet
3. vent hose from tank goes down next to shock aimed at ground
4. vent hose from centre of carbs goes back between air-box runners down next to shock aimed at ground

For misfire, you may want to try fuel-system cleaner with strong dose of PEA. More than just jets needs to be cleaned. All internal hidden/secret passages between jets and carb-venturi needs to be cleaned. Basically need to mechanically scrub entire flow-path of petrol from tank to intake-valves.

- Red Line SI-1
- Techron Concentrate Plus
- Gumout All-in-One
- 3M Max Strength Fuel System Cleaner #08814
- Royal Purple Max Atomizer 18000

For real carb-cleaning, you need lots more equipment and lots more elbow-grease:
https://www.ninjette.org/forums/show...7&postcount=11

I followed your instructions still nothing.

[DannoXYZ]

If hoses are correct, then something else is wrong.

First, test for air-flow/compression:
- put plugs back in
- place tissue-paper over end of muffler
- crank engine
Does tissue-paper get blown off muffler?
Does air coming out of muffler smell like petrol?


Second, manually test petcock flow:
- disconnect fuel-hose from carbs and aim into measuring cupo
- apply vacuum to petcock vacuum line.
- time flow for 30-seconds (use stopwatch)
how many CCs of petrol did you collect in 30 seconds?


Third, test for spark:
- remove plugs from engine
- insert into plug-wires
- lay plugs on top of engine so case of plugs are grounded
- crank engine.
What colour spark do you get?

[VaFish]

All I have to say is that video is a terrible way to clean a carb.

Pull them out and clean them right.