MotoHouston.com MotoHouston.com
Register Members List Member Map Media Calendar Garage Forum Home Mark Forums Read

Go Back   MotoHouston.com > Technical > How To's and Q & A's
Forgot info?

Welcome to MotoHouston.com! You are currently viewing our forums as a guest which gives you limited access to the community. By joining our free community you will have access to great discounts from our sponsors, the ability to post topics, communicate privately with other members, respond to polls, upload content, free email, classifieds, and access many other special features. Registration is fast, simple and absolutely free, join our community!

Register Today!

If you have any problems with the registration process or your account login, please contact us.


FREE MH Decals by MAIL!

Advertisement

Reply
Share This Thread: 
Subscribe to this Thread Thread Tools
Old 05-25-2017, 08:56 AM   #1
albertinhouston
Senior Member
 
albertinhouston's Avatar
 
Join Date: Oct 2005
Feedback Rating: (2)
Posts: 1,506












ninja 250 bogging/dying with any throttle

Bike is a ninja 250 2008:

Bike sat for a while before I got it so I figured a carb clean for sure.
pulled them off they were actually very inside so I just reassembled and installed them. bike started right up idled great had a flat spot 4-5k if I wacked the throttle. I can roll through it slowly and it'll be ok.

So I put some fresh tank of gas ran some seafoam rode the out of it about 10 mile to hopefully clear out the cobwebs (so to speak) It ran great... bog cleared up a lil then...
Bam! bike would only idle(with choke) any throttle it'll die off.

I pulled the carbs a 2nd time they looked clean but couldn't get to the pilot jet(didn't have the right size screwdriver) same results.

pulled them again last night. went through every port with the usual process. soaked them. blew air just to do it right and not miss something....
NOTE: carbs are super clean no debris what so ever.

I'm not familiar with these 250's But I'm thinking it might not be in the carbs.
I have good spark at the plugs. both header pipes bead water off when sprayed on...

any 250 specific things I need to look for?
TIA
albertinhouston is offline   Reply With Quote
Similar Topics
Thread Thread Starter Forum Replies Last Post
ninja 250 help md786 General Discussion (Moto Related) 34 07-19-2012 03:51 PM
Anyone with a ninja 250 or a rebel 250 I could borrow/rent? logan5 General Discussion (Moto Related) 29 04-12-2011 12:32 PM
ninja 250 Duck84 How To's and Q & A's 22 08-02-2007 05:41 PM
Anyone w/ a Ninja 250...... Slingblade92 General Discussion (Moto Related) 12 02-11-2007 07:00 PM
ninja 250 witchdoctor575 General Discussion (Moto Related) 8 06-27-2006 05:39 PM
Advertisement
Old 05-25-2017, 09:22 AM   #2
cuong-nutz
Resident 250 guru
 
cuong-nutz's Avatar
 
Join Date: Mar 2009
Feedback Rating: (9)
Posts: 4,672

Experience: 1-3 months

Bike(s):
Ninjer 250









Float needles not sticking? No tears diaphragm? Carb boots secure? It's mostly a carb issue. These 250s are so simple and all running issues are mostly carb related. Does it have a jet kit or stock stuff? Pods or stock airbox? A dirty filter will still run but getup will be lacking.
__________________
250cc's of pure Nutz
Ninjette Stunt Life Stunt Ride
cuong-nutz is offline   Reply With Quote
Liked this post:
Old 05-25-2017, 09:24 AM   #3
FZ1
Banned
 
Join Date: Dec 2015
Feedback Rating: (0)
Posts: 624












User is banned

.
FZ1 is offline   Reply With Quote
Old 05-25-2017, 10:15 AM   #4
albertinhouston
Senior Member
 
albertinhouston's Avatar
 
Join Date: Oct 2005
Feedback Rating: (2)
Posts: 1,506












I'm not an expert at carb cleaner but I'm Pretty good when it comes to the Hyousungs that I build. I've probably done 20 carbs in 2 years. Most of the time I get it right the first time. I say that only as a reference so when I say.... I didn't see anything out f the ordinary.. it has a little merit.
no tears in the diaphragms... needles clean. vaccum hoses good...
I have another 250's I'm using as a reference to be sure I'm reassembling everything correctly.

I didn't want to do this since the carbs suck to take off but I guess i'll swap a known set of good carbs off my other bike to see it the issue goes away.
albertinhouston is offline   Reply With Quote
Old 05-25-2017, 01:21 PM   #5
cuong-nutz
Resident 250 guru
 
cuong-nutz's Avatar
 
Join Date: Mar 2009
Feedback Rating: (9)
Posts: 4,672

Experience: 1-3 months

Bike(s):
Ninjer 250









I am assuming you removed the pilot jet needles and cleaned it out? Those tiny orifices cause a lot of headache if thy plug up.
__________________
250cc's of pure Nutz
Ninjette Stunt Life Stunt Ride
cuong-nutz is offline   Reply With Quote
Old 05-25-2017, 01:42 PM   #6
albertinhouston
Senior Member
 
albertinhouston's Avatar
 
Join Date: Oct 2005
Feedback Rating: (2)
Posts: 1,506












yes... Soaked and ran wire through as well as compressed air.

Again. Since day one they carbs have shown no signs of any debris, gel, or old gas.

I had a thought that I got the ratio's wrong with the sea foam and I'll replace the plugs just because they are cheap and easy.
albertinhouston is offline   Reply With Quote
Old 04-19-2018, 12:58 PM   #7
xylo
yo dawg
 
Join Date: Feb 2012
Location: Houston, TX
Feedback Rating: (1)
Posts: 84

Experience: 6 years
Trackdays: 6

Bike(s):
2007 Ninja 250
2005 SV650
1997 FZR600R (SOLD)
2002 XR400R Motard (SOLD)
2006 SV650 (SOLD)

Member Garage





Also worth checking into the vacuum operated petcock and tiny filter. You can test pretty easily if you have a mityvac to pull vacuum on the line that connects from the petcock to the air side of the carb. Check for good flow into a bucket or something.
xylo is offline   Reply With Quote
Old 04-19-2018, 02:49 PM   #8
Jae
Kilted Basterd
 
Jae's Avatar
 
Join Date: Sep 2007
Location: Cypress
Feedback Rating: (9)
Posts: 5,229

Experience: 10+ years

Bike(s):
'08 GSX-R 600
'06 SV650s
'14 Russian POS
several Hyosung mutts

Member Garage


any fuel filters? did you check that the petcock is clear? I had a dirtbike petcock clog up such that it was letting almost no fuel past. Swore it was an issue with the carb until I disconnected the fuel line for the third time and realized almost nothing came out even with the petcock in the "on" position. Both of the recent suzuki's I cleaned out ended up with plugged up fuel fitlers ('06 SV and '08 GSXR) not long after cleaning everything out and actually starting to ride them again.
__________________
Keeping the "F-U" in "fun"


Quote:
Originally Posted by gixxerbill View Post
There conclusions are soo foolish and idiot I can't even begin to take them seriously.
Jae is offline   Reply With Quote
Old 04-19-2018, 03:10 PM   #9
bumblebee
Yeah I'm flippin' YOU off
 
bumblebee's Avatar
 
Join Date: Oct 2006
Location: Pearland
Feedback Rating: (3)
Posts: 13,620


Bike(s):
'74 Suzuki GT380
'82 XS650 StreetTracker
'17 Triumph Thruxton R
'83 Yamaha Seca 900






Way to resurrect a year old thread!
If he hasn't resolved his carb issue by now, he's got worse trouble! Ha ha
__________________
Asphalt is for racing... dirt is for growing potatoes. - J. Diester
When seconds count... the police are only minutes away.
Grow up and be a productive member of society already.
Bevo- "I lack skillz"
bumblebee is offline   Reply With Quote
Liked this post:
Old 04-19-2018, 03:42 PM   #10
Rod
Near Miss Racing Team #96
 
Rod's Avatar
 
Join Date: May 2013
Location: Houston, TX
Feedback Rating: (0)
Posts: 1,823

Experience: 10+ years
Trackdays: 10+

Bike(s):
R3 2015
TS185 74
EX250R 2010 "A" race bike
EX250R 2008 "B" race bike
150cc Rocketta Scooter "the "






Quote:
Originally Posted by bumblebee View Post
Way to resurrect a year old thread!
If he hasn't resolved his carb issue by now, he's got worse trouble! Ha ha
I was about to say something but it would have not turned out this funny
__________________
CMRA#672
Rod is offline   Reply With Quote
Old 05-01-2018, 12:25 PM   #11
albertinhouston
Senior Member
 
albertinhouston's Avatar
 
Join Date: Oct 2005
Feedback Rating: (2)
Posts: 1,506












The issue was a small port that runs next to the main and pilot jets. I didn't know it has two openings in it. one side was still clogged up.

I've done 3 other 250's and that small port popped up as dies with any throttle clears it out and all ran fine
albertinhouston is offline   Reply With Quote
Liked this post:
Old 05-03-2018, 01:35 PM   #12
Jae
Kilted Basterd
 
Jae's Avatar
 
Join Date: Sep 2007
Location: Cypress
Feedback Rating: (9)
Posts: 5,229

Experience: 10+ years

Bike(s):
'08 GSX-R 600
'06 SV650s
'14 Russian POS
several Hyosung mutts

Member Garage


Ha, in responding following Xylo I completely missed that a year had passed since the initial post. Good (for us) to know the resolution though, for future reference.
__________________
Keeping the "F-U" in "fun"


Quote:
Originally Posted by gixxerbill View Post
There conclusions are soo foolish and idiot I can't even begin to take them seriously.
Jae is offline   Reply With Quote
Old 05-03-2018, 02:16 PM   #13
JetBuilt
Repeat Offender
 
JetBuilt's Avatar
 
Join Date: Nov 2005
Location: ShoreAcres
Feedback Rating: (15)
Posts: 12,662

Experience: 10+ years

Bike(s):
1950 Chevy Deluxe
1980 Honda CT70
1987 Kawasaki 650SX
1996 Honda Z50






Send a message via AIM to JetBuilt
At least the dude responded with something useful, and that resulted in updated searchable material for anyone reading this thread in the future.
__________________
I understand the consequences of my actions prior to engaging in those actions. . .there are certain situations in life where the risk is totally worth the reward.
JetBuilt is offline   Reply With Quote
Reply


Thread Tools

Advertisement


All times are GMT -5. The time now is 06:27 PM.


MotoHouston.com is not responsible for the content posted by users.
Privacy Policy