Bike Loses power at around 3k RPM - Kawasaki Ninja 250R Forum
 
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post #1 of 5 (permalink) Old 01-30-2015, 04:29 PM Thread Starter
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Bike Loses power at around 3k RPM

Hey guys, i'm having a really annoying problem. A couple weeks ago my bike started acting a little funny, after taking off from a stoplight I noticed it started loosing power. Sort of like if it falls out of second gear into neutral and jumps back in. It did it for maybe 2 miles and then decided it wanted to work again.
A few days passed, during which I tried replicating the problem, but without any luck. Until I started riding it away from my house it started again, but this time is hasn't stopped. At first I thought it was a clutch, so I replaced it, then I thought it might be the sparkplugs, or the ignition coil, so i replaced the sparkplugs and tested the spark, which was a purple blue colour, which is healthy.I have always used premium fuel. I flushed the coolant, I checked to see if the carb was dirty by taking out the little screw, and it seemed as clean as can be. I have always changed the oil every 2000 miles, chain is always lubricated and adjusted. Any Ideas? Here is what I have:
2010 Ninja 250r Special Edition 9700miles
new clutch
adjusted cam chain tentioner
Thanks in advance, this is getting to be a real pain in my arse.
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post #2 of 5 (permalink) Old 01-31-2015, 04:44 PM
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Not sure what could be causing the gears to slip outside of the clutch slipping, which you seem to have ruled out.

As far as a loss of power, that could be anything from the carbs to the valves. When was the last time the valves were adjusted? Should be done every 6,000 miles or every other oil change.



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post #3 of 5 (permalink) Old 02-01-2015, 10:07 AM Thread Starter
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As far as I know, the valves have never been adjusted. Unless the previous owner did so. As I said it is at 9700 miles. Is it hard to do a valve adjustment?
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post #4 of 5 (permalink) Old 02-01-2015, 01:00 PM
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It's not hard, but it is a little tedious. You should do it asap. I bought my bike with about 10,000 miles and apparently the PO had never adjusted the valves and a few of the rocker arms were broken. Somehow it still ran ok off of one cylinder, but once I fixed it, it felt like the engine was brand new.



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post #5 of 5 (permalink) Old 02-01-2015, 07:22 PM Thread Starter
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Okay, I will definitely look into that. Thank you so much!
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