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Old 12-03-2008, 08:37 PM   #1
specterunseen
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Trouble Shooting Tip

Now, I have a 250. it may not be a rocket, but it will get up and go at speeds 0-85 pretty quick leaving behind most general cars.
I just recently got my tune up and now and having some issues.... any tips anyone?

I had changed my sprocket that decreased rpm, but left it feeling gutless, so I switched back to the stock sprocket... and still have the issue. The issue is the torque curve is gone. The ninja is light on power anyway, so I can feel the decrease. I basically open the throttle all the way in 5th and am only going 70mph, with literally NO passing power. There is no power curve or spike of any at the higher rpm like it used to be.

I had the valves adjusted, carbs cleaned, coolant changed, brakes bleed and upgrade, new tire, new o - ring chain.

Any tips on what could have caused such a lapse of the torque and power delivery? I'm racking my brain to figure out what I could have changed or done without thinking.
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Old 12-03-2008, 09:29 PM   #2
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thanksgiving...
I think we all put on a few lbs, the 250 just isn't so good at hiding it from you
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Old 12-03-2008, 09:33 PM   #3
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When exactly did this happen?

Noticed directly after the tune up was performed?

Or with the last fill up of gas?
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Old 12-03-2008, 09:42 PM   #4
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considering i'm 160sih-170sih, i don't think it was weight....
and right after the tuneup
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Old 12-03-2008, 10:21 PM   #5
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Quote:
Originally Posted by specterunseen View Post
considering i'm 160sih-170sih, i don't think it was weight....
and right after the tuneup
who tuned it up?
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Old 12-03-2008, 10:28 PM   #6
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somone who knows what they are doing. I just haven't had the time to drop it off, since its my only form of transportation. Believe me, he's a pro, but off the top of my head and his head nothing clicked that could pin down a cause. Just wondering if anybody else that had a 250 or has worked on them ever experinced a change like this. It's depressing to ride all the time with the throttle nearly all the way open and still not have much passing power or speed.
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Old 12-03-2008, 10:29 PM   #7
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i never had a need to change anything on my 250...
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Old 12-03-2008, 11:11 PM   #8
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is it possible the jets were taken out when the carbs were cleaned and not put bck in the right places? i am pretty sure that 2 outside carbs have different secondary jets than the 2 inside carbs.
btw if you ever want to race i can get a 15 year old stock 5 spd accord that will be a pretty even race!
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Old 12-04-2008, 12:19 AM   #9
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Quote:
Originally Posted by v4lu3s View Post
is it possible the jets were taken out when the carbs were cleaned and not put bck in the right places? i am pretty sure that 2 outside carbs have different secondary jets than the 2 inside carbs.
btw if you ever want to race i can get a 15 year old stock 5 spd accord that will be a pretty even race!
how many carbs duz this 250 have?!?!
you double check to make sure everything is nice and tight? thats always step one.
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Old 12-04-2008, 12:20 AM   #10
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whops was thnking of a diff bike lol, im way too tired....sorry!
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Old 12-04-2008, 07:38 AM   #11
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Quote:
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whops was thnking of a diff bike lol, im way too tired....sorry!


It may be slow, but shouldn't be THAT slow. lol
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Old 12-04-2008, 07:39 AM   #12
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i'm sure the carb was put back together right, the guy that worked on it I trust implicity. I'm just trying to figure out a possibly reason for the lack of torque now.
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Old 12-04-2008, 08:58 AM   #13
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Even tho you trust this guy implicitly we all make mistakes. It is quite possible that something was forgotten w/the jets or something isn't tight. We aren't saying the guy didn't know what he was doing but maybe he missed a step or overlooked something. No harm in checking
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Old 12-04-2008, 10:00 AM   #14
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Take it to a mechanic and have them look at it. Perhaps not the same guy who did your "tune up".
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Old 12-04-2008, 11:38 AM   #15
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Not sure on a 250 but there is a chance he changed the timing when he adjusted the valves. Again, I am not sure you have to remove anything to get to the timing marks, but it bears checking.
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