06 Ninja damaged pilot jet seats?

painfulpillow · June 2nd, 2015, 06:33 PM

Hello! I'd like to introduce myself as a new motorcycle owner and soon to be rider (taking the MSF class this coming weekend). Very excited to start riding.

Any-who, I recently bought my brothers old 06 Ninja 250 that he had sitting in my parents backyard for 6 years and got it for $200. Only had 5000 miles so I thought I would be crazy not to. I've spent the last 2 weeks working on rebuilding the carbs and was successful in getting it to start and idle smoothly but any throttle and it would die. Every jet was cleaned, checked and double checked for any clogs. I tore apart the carb again tonight and noticed this in the pilot jet:

Good:

Bad?:

I've tried the usual stuff to diagnose it dying (vacuum lines all connected, boots snug, jets free from clogs, etc.) but whats going on here? Thank you!

Ghostt · June 3rd, 2015, 03:42 AM

Hmmmm, you know, I have no idea??? maybe @ducatiman might know? You are referring to the pilot and not the main?

Can you describe how you cleaned the carburetors, and are the emulsion tubes all clear? Also what is your experience Motorcycle carburetors?

Any modifications to the bike?

I hope this doesn't offend you, it will just save time,

Also Welcome, here are just a few things to think about,

1.Get trained and licensed MSF Courses

2.ALWAYS Wear protective gear -- ATGATT All The Gear, All The Time -- including a helmet manufactured to the standards set by a government agency.

3.ALWAYS Ride unimpaired by alcohol or other drugs

4.ALWAYS Ride within your own skill limits

5.Be a lifelong learner by taking refresher rider courses, and advanced rider course A.R.C

https://www.ninjette.org/forums/showthread.php?t=218237

https://www.ninjette.org/forums/show...8&postcount=26

A.T.G.A.T.T. so I may ride another day.

painfulpillow · June 3rd, 2015, 04:55 AM

Thanks for the response, the bike is stock as far as I know (hoping he didn't try to change the jets). The emulsion tubes looked good: I soaked them in carb cleaner and made sure every.. darn... hole was clear. When I cleaned the carbs, I took every hose and all rubber/plastic off and soaked it in carb cleaner for a good 2 hours. Then proceeded to blow it with air.

This is my first time working on a carb but I made sure to follow the DIY's and check all the boxes.

In the 2nd picture it looks like the seat of the pilot jet is torn/broken. Maybe this is causing it to flood with any throttle?

jkv45 · June 3rd, 2015, 07:35 AM

I don't think there is a problem.

I believe you are just seeing where the 2 passages join the bottom of the opening.

Ghostt · June 3rd, 2015, 08:06 AM

Did you replace any parts? Float needle valves? Set float heights? Did you remove the idle mixture caps? Did you remove the idle mixture screws? Set them to 3x out? Are you sure no parts are missing?

I myself one time overlooked part# 16017 in one of the carburetors, and it caused me a few hours of aggravation, til I realized it was missing. Also if this part is installed backwards, it will cause trouble as well.

Be sure to install a fuel filter, and check to be sure the petcock is working properly.

painfulpillow · June 3rd, 2015, 06:14 PM

Lol yes that annoying retainer: I had mine fall out randomly and didn't know where it went. I bought 2 carb rebuild kits and changed both float needles and the idle jet needle assembly (o-ring, washer, needle). Originally I had them set to 2.5 turns but it wasn't running idling right, so I turned it back to 3.5. Didn't change the jets just cleaned them in carb cleaner.

I'll double check that everything is there.

Ghostt · June 3rd, 2015, 06:25 PM

Quote:

Originally Posted by painfulpillow

Lol yes that annoying retainer: I had mine fall out randomly and didn't know where it went. I bought 2 carb rebuild kits and changed both float needles and the idle jet needle assembly (o-ring, washer, needle). Originally I had them set to 2.5 turns but it wasn't running idling right, so I turned it back to 3.5. Didn't change the jets just cleaned them in carb cleaner.

I'll double check that everything is there.

Did you set the float height? This is the most important, and overlooked part of carburetor tuning. If these are not set proper, then everything else is pointless.

painfulpillow · June 3rd, 2015, 07:29 PM

I just checked them and they read 19mm and 15mm (best I could tell). Put them back on and it idles great, but any throttle and dies.

jkv45 · June 4th, 2015, 07:34 AM

Quote:

Originally Posted by painfulpillow

I just checked them and they read 19mm and 15mm (best I could tell). Put them back on and it idles great, but any throttle and dies.

Set them both to the correct spec (I believe it's 17mm).

Either your main jet is plugged, your slides are not lifting properly, or something is not assembled correctly.

ducatiman · June 9th, 2015, 06:12 PM

or your pilot jets and/or circuits are plugged.

the pilot jet drilling you were concerned with looks perfectly normal, btw.

The pilot circuit go beyond that drilling, and branch out in a couple directions.

June 2nd, 2015, 06:33 PM	#1
painfulpillow ninjette.org newbie Name: David Location: Owasso Join Date: Jun 2015 Motorcycle(s): 06 Ninja 250 Posts: 4	06 Ninja damaged pilot jet seats? Hello! I'd like to introduce myself as a new motorcycle owner and soon to be rider (taking the MSF class this coming weekend). Very excited to start riding. Any-who, I recently bought my brothers old 06 Ninja 250 that he had sitting in my parents backyard for 6 years and got it for $200. Only had 5000 miles so I thought I would be crazy not to. I've spent the last 2 weeks working on rebuilding the carbs and was successful in getting it to start and idle smoothly but any throttle and it would die. Every jet was cleaned, checked and double checked for any clogs. I tore apart the carb again tonight and noticed this in the pilot jet: Good: Bad?: I've tried the usual stuff to diagnose it dying (vacuum lines all connected, boots snug, jets free from clogs, etc.) but whats going on here? Thank you!

June 3rd, 2015, 03:42 AM	#2
Ghostt in your machine Name: Scott Location: Summer Shade, Ky. Join Date: Oct 2014 Motorcycle(s): 98 Ninja 250/F12 aka ZX-2R "SERENITY", 91 Ninja 500/A5 aka ZX-5R "Phoenix", 84 Honda GL1200A "SIREN" Posts: A lot. Blog Entries: 25 MOTM - Jun '17, May '16, Mar '15	Hmmmm, you know, I have no idea??? maybe @ducatiman might know? You are referring to the pilot and not the main? Can you describe how you cleaned the carburetors, and are the emulsion tubes all clear? Also what is your experience Motorcycle carburetors? Any modifications to the bike? I hope this doesn't offend you, it will just save time, Also Welcome, here are just a few things to think about, 1.Get trained and licensed MSF Courses 2.ALWAYS Wear protective gear -- *ATGATT* All The Gear, All The Time -- including a helmet manufactured to the standards set by a government agency. 3.ALWAYS Ride unimpaired by alcohol or other drugs 4.ALWAYS Ride within your own skill limits 5.Be a lifelong learner by taking refresher rider courses, and advanced rider course A.R.C https://www.ninjette.org/forums/showthread.php?t=218237 https://www.ninjette.org/forums/show...8&postcount=26 A.T.G.A.T.T. so I may ride another day. __________________________________________________ *violente et ignorantia* ZX-2R BLOG *Twitter and Instagram = Ghostt_Scott* *I'm not here to change your mind, just to inform.*

June 3rd, 2015, 08:06 AM	#5
Ghostt in your machine Name: Scott Location: Summer Shade, Ky. Join Date: Oct 2014 Motorcycle(s): 98 Ninja 250/F12 aka ZX-2R "SERENITY", 91 Ninja 500/A5 aka ZX-5R "Phoenix", 84 Honda GL1200A "SIREN" Posts: A lot. Blog Entries: 25 MOTM - Jun '17, May '16, Mar '15	Did you replace any parts? Float needle valves? Set float heights? Did you remove the idle mixture caps? Did you remove the idle mixture screws? Set them to 3x out? Are you sure no parts are missing? I myself one time overlooked part# 16017 in one of the carburetors, and it caused me a few hours of aggravation, til I realized it was missing. Also if this part is installed backwards, it will cause trouble as well. Be sure to install a fuel filter, and check to be sure the petcock is working properly. __________________________________________________ *violente et ignorantia* ZX-2R BLOG *Twitter and Instagram = Ghostt_Scott* *I'm not here to change your mind, just to inform.*

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June 3rd, 2015, 04:55 AM	#3
painfulpillow ninjette.org newbie Name: David Location: Owasso Join Date: Jun 2015 Motorcycle(s): 06 Ninja 250 Posts: 4	Thanks for the response, the bike is stock as far as I know (hoping he didn't try to change the jets). The emulsion tubes looked good: I soaked them in carb cleaner and made sure every.. darn... hole was clear. When I cleaned the carbs, I took every hose and all rubber/plastic off and soaked it in carb cleaner for a good 2 hours. Then proceeded to blow it with air. This is my first time working on a carb but I made sure to follow the DIY's and check all the boxes. In the 2nd picture it looks like the seat of the pilot jet is torn/broken. Maybe this is causing it to flood with any throttle?

June 3rd, 2015, 07:35 AM	#4
jkv45 Rev Limiter Name: Jay Location: WI Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot. MOTM - Jun '18, Oct '16	I don't think there is a problem. I believe you are just seeing where the 2 passages join the bottom of the opening.

June 3rd, 2015, 06:14 PM	#6
painfulpillow ninjette.org newbie Name: David Location: Owasso Join Date: Jun 2015 Motorcycle(s): 06 Ninja 250 Posts: 4	Lol yes that annoying retainer: I had mine fall out randomly and didn't know where it went. I bought 2 carb rebuild kits and changed both float needles and the idle jet needle assembly (o-ring, washer, needle). Originally I had them set to 2.5 turns but it wasn't running idling right, so I turned it back to 3.5. Didn't change the jets just cleaned them in carb cleaner. I'll double check that everything is there.

June 3rd, 2015, 07:29 PM	#8
painfulpillow ninjette.org newbie Name: David Location: Owasso Join Date: Jun 2015 Motorcycle(s): 06 Ninja 250 Posts: 4	I just checked them and they read 19mm and 15mm (best I could tell). Put them back on and it idles great, but any throttle and dies.

June 9th, 2015, 06:12 PM	#10
ducatiman ninjette.org certified postwhore Name: Gordon Location: new york Join Date: Sep 2009 Motorcycle(s): '95 DUCATI 900SS/SP '07 DUCATI SS800 '19 HONDA CBR650R Posts: A lot. MOTM - Nov '18, Mar '17	or your pilot jets and/or circuits are plugged. the pilot jet drilling you were concerned with looks perfectly normal, btw. The pilot circuit go beyond that drilling, and branch out in a couple directions.