Power loss at high speeds. - Kawasaki Ninja 250R Forum
 
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post #1 of 8 (permalink) Old 03-31-2013, 10:12 AM Thread Starter
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Power loss at high speeds.

I rejetted my carbs and installed pods, drilled out the slide lift holes. I had a chance to ride it on hwy and it bogs down when I try to go over 75 mph. Anything I should check? Is this how it runs with jet kit? Thanks.

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post #2 of 8 (permalink) Old 03-31-2013, 12:53 PM
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did you also sync the carbs? That's what it sounds like to me



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post #3 of 8 (permalink) Old 03-31-2013, 01:39 PM Thread Starter
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No I have not sync carbs. It will redline in neutral but in 6th gear it won't go past 9,000. Bogs down when I give it too much throttle when I back off it feels like it starts to put again. Previous owner told me he sync carbs but he said a lot that wasn't done or done right. Will sync carbs and make a run again. Thanks for the reply.

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post #4 of 8 (permalink) Old 03-31-2013, 02:39 PM
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Quote:
Originally Posted by ronnrs View Post
I rejetted my carbs and installed pods, drilled out the slide lift holes. I had a chance to ride it on hwy and it bogs down when I try to go over 75 mph. Anything I should check? Is this how it runs with jet kit? Thanks.

What size jets did you put in?
Did you adjust your jetting for altitude, humidity and temperature?
What octane gas are you using?
What about your plugs, stock or Iridium?

How Constant Velocity Carburetors Work
http://www.motorcycleproject.com/mot...bs_work_v3.swf

Motorcycle Carburetor Theory 101
http://www.motorcyclecarbs.com/carbs101.pdf

Pipe Jetting (A Must Read)
http://www.motorcycleproject.com/mot...s-jetting.html

Carburetor Jet Tech
http://www.motorcycleproject.com/mot...et_tech_v3.swf
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post #5 of 8 (permalink) Old 03-31-2013, 04:28 PM Thread Starter
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Hey dablue1 it had a 105 jet I put a 107 and it ran better but not perfect so I put a 110 and it ran smooth used two needle shim. I use 87 octane and it has stock plugs. I had carbs off four times and never sync carbs. Not sure how to adjust jet for humidity etc. Looks like I need to do some reading.

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post #6 of 8 (permalink) Old 03-31-2013, 04:42 PM Thread Starter
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I also drilled the slide lift hole to 7/64.

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post #7 of 8 (permalink) Old 04-01-2013, 07:15 AM Thread Starter
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I can't find the homemade sync gauge on here. Can someone post it and will give that a try and go from there.

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post #8 of 8 (permalink) Old 04-01-2013, 12:54 PM
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Quote:
Originally Posted by ronnrs View Post
I can't find the homemade sync gauge on here. Can someone post it and will give that a try and go from there.

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Here

https://www.250r.net/forum/showthread.php?t=1693

http://faq.ninja250.org/wiki/How_do_...carburetors%3F

Last edited by DaBlue1; 04-01-2013 at 01:08 PM.
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