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Thread: Power loss in mid - high range

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  1. #1
    Gold Member Jamdc5's Avatar
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    Name: James
    Bikes: 250

    Default Power loss in mid - high range

    Bought my 07 ninja 250 less than a month ago with 14k miles.

    Today I decided to take the bike for the first time to Aubrey to get a better overall feel for the bike instead of my normal freeway driving. On my way back I noticed that tried to accelerate but there was no power (haha I know it's a 250) but it bogged and went no where. There is no speedometer on the bike right now but I was barely keeping up with normal traffic going approximately 50 mph. Here is power loss thought out the entire power band and it is more significant in the mid and high range. I'm thinking possibly the carbs? Has anyone else had his issue and what was the problem?

  2. #2
    Dualsport Whore montibank's Avatar
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    Name: Michael
    Bikes: 08 530 EXC-R | 04 KTM 950 Adventure | 86 TLR 200

    Default Re: Power loss in mid - high range

    Hummm... Thats odd. Did it heat up before power loss?

    250s are air cooled right?
    Central California Dualsport Enthusiast
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  3. #3
    Gold Member Jamdc5's Avatar
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    Name: James
    Bikes: 250

    Default Re: Power loss in mid - high range

    Quote Originally Posted by montibank View Post
    Hummm... Thats odd. Did it heat up before power loss?

    250s are air cooled right?
    It has a radiator and coolant but I removed the cluster 2 weeks ago so I don't know if it was overheating :/

    It has a new k&n air filter and I did the oil change about 2 weeks ago

  4. #4
    Dualsport Whore montibank's Avatar
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    Name: Michael
    Bikes: 08 530 EXC-R | 04 KTM 950 Adventure | 86 TLR 200

    Default Re: Power loss in mid - high range

    Did you put the K&N on? Previously was it a stock air filter? This is a carburated buke right?

    To anyone else that may have owned one of these ... How sensitive to filter changes are they for being lean?
    Central California Dualsport Enthusiast
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  5. #5
    Gold Member Jamdc5's Avatar
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    Name: James
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    Default Re: Power loss in mid - high range

    Quote Originally Posted by montibank View Post
    Did you put the K&N on? Previously was it a stock air filter? This is a carburated buke right?

    To anyone else that may have owned one of these ... How sensitive to filter changes are they for being lean?
    It's a carburated 250 and it did have an oem air filter on before I upgraded to the k&n. I doubt that's the problem because it ran fine till today. I am hoping it's not major issue

  6. #6
    Senior Member Jetstream01's Avatar
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    Name: Patrick
    Bikes: 2005 RC51

    Default Re: Power loss in mid - high range

    Honestly, it sounds like a dead batrery to me or low voltage in the charging system. Charge the battery then take it back out and see if it's still happening.
    Old sport bikes just have more character.

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