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  • CBUnicorn problem

    Hello folks,

    Since last 3 months I am facing a strange problem with my one year old CBUni.
    1. It started with speed of the bike. Initially I felt abnormal operation wrt smoothness. While driving upto speed of 40 even without pillion I felt like the bike is loaded or someone is pulling my bike backward. Then I thought of changing the petrol pump where i usually fill the tank.
    2. I used to make 1-2 kicks at the morning without the choke to start the bike and usually avoid the self start in the morning. Then started the problem at cold start. Without the choke bike was not starting even after 3-4 kicks. Even after start of engine once i release the choke the engine feels heavily loaded and the throttle doesn't accelerate easily i.e. the RMP clock was not reaching 4k easily. I had to accelerate very hard. Engine was giving same noise as it gives when petrol goes to reserve. This continues for initial 10-15 mins.
    3. Then after a month or so bike was on rest for 2-3 days. Then i found that battery was completely down. no indicator no neutral flash nothing was working. Somehow i started the bike with almost 15 kicks with choke on.
    4. Then I went to Honda service canter. They charged the battery and on the next morning i felt some improvement wrt the engine load. It was slightly on the normal side.
    5. Day by day after 2-3 weeks the condition again became as previous. Again i went to Honda service center they again charged the battery and asked me to check the battery with dealer saying it is damaged.
    6. Battery dealer said the battery is ok and was not ready to replace. After that i changed by battery to Exide 7ah. Next morning i checked bike but still it is giving same problem for initial 5 mins but intensity of problem was less. That is now bike gets started without choke on the second kick and until and unless make the choke on it doesn't accelerate easily beyond 4k rpm mark for initial 3-4 mins.

    Does battery play a role once engine starts? What could be the problem? Battery or engine?

  • #2
    Query approved.
    (Been There Done That) x 3.25

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    • #3
      Originally posted by Ravindra84 View Post
      Does battery play a role once engine starts? What could be the problem? Battery or engine?
      The battery gets charged when the vehicle is running. Other than that, assuming Unicorn has a digital CDI, battery is used to power your CDI. Then supply power to horn, turn lights, rear brake light as you must be aware.

      What's the ODO click on your Uni? When was the last time you got your Uni serviced? What all were done? Check your alternator & charging unit in addition to battery.

      IMO, you seem to be more biased with battery & the issue, though it may or may not be related.
      Skill is what keeps you on a Motorcycle
      Awareness + Skill is what keeps you out of harm's way
      ATGATT + Awareness + Skill means you might Live To Ride another day

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      • #4
        Originally posted by aargee View Post
        The battery gets charged when the vehicle is running. Other than that, assuming Unicorn has a digital CDI, battery is used to power your CDI. Then supply power to horn, turn lights, rear brake light as you must be aware.

        What's the ODO click on your Uni? When was the last time you got your Uni serviced? What all were done? Check your alternator & charging unit in addition to battery.

        IMO, you seem to be more biased with battery & the issue, though it may or may not be related.
        that is what i was thinking, what battery has to do with cold start problem.

        although there can be alot things that can go wrong, you can start by checking the air/fuel mixture screw and then carb. get your carb cleaned thourougly and get it checked for any malfunctioning parts and then get it tuned properly. then report back.

        btw, which city you are in??
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        • #5
          Unicorn has a cold start problem my friend, ive used one for 2 years. Nothing to do with the battery, You will have to be very gentle with the throttle for first few kms in the morning.
          Also once it starts keep it idling at 3.5K RPM with the help of the accelarator ofcourse (after you have released the choke) for about a minute or so, untill lag in throttle response is minimized. The put it in motion and gently put it through its paces.
          RIDE IT LIKE YOU STOLE IT!!!


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