Forum: 2018+ Ninja 400 General Discussion
May 2nd, 2024, 07:07 AM
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Replies: 9
Views: 9,415
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Forum: General Motorcycling Discussion
February 20th, 2024, 08:04 AM
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Replies: 2
Views: 2,348
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Forum: 1986 - 2007 Ninja 250R Tech Talk
December 21st, 2023, 07:34 AM
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Replies: 1
Views: 1,017
Welcome!
Yes - you are on the right track. ...
Welcome!
Yes - you are on the right track.
Most will agree that the engine runs best with an original airbox.
In addition, it's very possible you may need to remove and clean the carbs,...
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Forum: 2008 - 2012 Ninja 250R Tech Talk
November 13th, 2023, 07:58 AM
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Replies: 18
Views: 2,998
I would put a gauge on the line to check fuel...
I would put a gauge on the line to check fuel pressure.
More than any other part I've heard of, aftermarket fuel pumps tend to be bad, mostly because they do not provide adequate fuel pressure to...
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Forum: 2018+ Ninja 400 General Discussion
October 19th, 2023, 11:26 AM
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Replies: 9
Views: 9,415
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Forum: Ninjettes At Speed
September 25th, 2023, 07:16 PM
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Replies: 12
Views: 9,494
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Forum: New Members
July 5th, 2023, 08:51 AM
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Replies: 17
Views: 1,201
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Forum: The Ex-Ninjetters Lair
November 23rd, 2022, 02:00 PM
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Replies: 10
Views: 2,031
Don't go Danno!
I've never personally had a...
Don't go Danno!
I've never personally had a Ninja 250 (my sons have), and they haven't kicked me out yet.
Have you thought about running a Supermoto?
Son in SoCal just bought a '22 Husky in...
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Forum: 1986 - 2007 Ninja 250R Tech Talk
October 6th, 2022, 04:02 PM
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Replies: 3
Views: 735
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Forum: 2008 - 2012 Ninja 250R Tech Talk
October 6th, 2022, 08:55 AM
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Replies: 8
Views: 993
Not sure what the cause/answer is here.
I...
Not sure what the cause/answer is here.
I would change the oil, using 10W-40, and fill no more than halfway up the sightglass.
Clean the airbox well, and keep an eye on it.
Oil does work its...
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Forum: 2008 - 2012 Ninja 250R Tech Talk
October 5th, 2022, 07:57 AM
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Replies: 8
Views: 993
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Forum: 1986 - 2007 Ninja 250R Tech Talk
August 16th, 2022, 06:30 AM
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Replies: 19
Views: 990
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Forum: 2008 - 2012 Ninja 250R Tech Talk
August 16th, 2022, 06:28 AM
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Replies: 43
Views: 3,393
Oy! That's a project!
You have a pretty...
Oy! That's a project!
You have a pretty good list going.
As Danno noted - I'd start with the engine.
Oil/filter, air filter, coolant, probably new battery, drain fuel and floatbowls,...
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Forum: 1986 - 2007 Ninja 250R Tech Talk
August 15th, 2022, 11:41 AM
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Replies: 19
Views: 990
It's odd that it just ran fine not long ago.
...
It's odd that it just ran fine not long ago.
Checking the valves is a good idea, though unusual, it's possible a rocker popped off or there's something unusual going on under the cover...
If...
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Forum: 1986 - 2007 Ninja 250R Tech Talk
August 15th, 2022, 06:13 AM
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Replies: 19
Views: 990
Hmmm...you have covered a lot of the possible...
Hmmm...you have covered a lot of the possible issues.
After a starting attempt, have you looked at the plugs to see if they are wet or dry?
Are you charging between attempts?
How old is the...
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Forum: 1986 - 2007 Ninja 250R Tech Talk
August 15th, 2022, 06:08 AM
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Replies: 5
Views: 625
As you stated - check for a vacuum leak.
...
As you stated - check for a vacuum leak.
Have you made fine adjustments to the idle mixture?
Have the carbs been synced recently?
I would do those things before pulling the carbs.
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Forum: 1986 - 2007 Ninja 250R Tech Talk
July 28th, 2022, 01:03 PM
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Replies: 26
Views: 2,215
I would say no.
It pulls cleanly, revs fine...
I would say no.
It pulls cleanly, revs fine at high RPMs, and the plugs look good - so I wouldn't change the jetting.
Did it do the same before changing the plugs? There are lots of...
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Forum: 1986 - 2007 Ninja 250R Tech Talk
July 28th, 2022, 07:41 AM
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Replies: 26
Views: 2,215
Does it sound like it's backfiring?
If you...
Does it sound like it's backfiring?
If you hold the throttle steady, at say 3000 RPMs when sitting in the garage, can you get it to do the same?
Have you adjusted the valves?
A compression...
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Forum: 1986 - 2007 Ninja 250R Tech Talk
July 27th, 2022, 06:29 AM
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Replies: 26
Views: 2,215
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Forum: 1986 - 2007 Ninja 250R Tech Talk
July 26th, 2022, 01:07 PM
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Replies: 26
Views: 2,215
So the problem is when holding a consistent...
So the problem is when holding a consistent throttle position and RPM only?
If it ran the same before and after carb work, it could mean you didn't correct the problem when you were in the carbs....
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Forum: 1986 - 2007 Ninja 250R Tech Talk
July 26th, 2022, 06:29 AM
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Replies: 26
Views: 2,215
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Forum: 2008 - 2012 Ninja 250R Tech Talk
July 18th, 2022, 07:25 AM
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Replies: 2
Views: 651
Danno pretty much has it covered. Doing carbs...
Danno pretty much has it covered. Doing carbs right isn't quick or easy.
Many times, hanging RPMs means a vacuum leak -but it can also be just a lean condition due to improper adjustments or...
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Forum: 2008 - 2012 Ninja 250R Tech Talk
July 5th, 2022, 06:51 AM
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Replies: 12
Views: 897
I would suspect the carb/jetting then.
It...
I would suspect the carb/jetting then.
It should run close to 100 MPH indicated, given the time.
Because you said it revs higher when you back-off the throttle from wide open, it tells me it's...
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Forum: 2008 - 2012 Ninja 250R Tech Talk
July 4th, 2022, 01:40 PM
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Replies: 12
Views: 897
Are they aftermarket jets? Many kits contain...
Are they aftermarket jets? Many kits contain parts that are not 100% correct - even though they look right.
105 Kehin jets should be good with an airbox. Stock 38 Pilots are fine. Basic idle...
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Forum: 1986 - 2007 Ninja 250R Tech Talk
June 1st, 2022, 12:45 PM
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Replies: 2
Views: 469
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