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Honda Unicorn

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  • #3361
    Re: CB Unicorn tyre change giving vibes @ 22kmph

    i have honda trigger
    and i have same exact issue
    at approx 22 speed same vibratation on footped
    check every thing but could not find the solution also my bike can not take speed in 1st gear its goes up to max 10 speed
    and i have to change gear to 2nd and the same i can not go more than 25 on 2nd... well also
    i have to accelerate more in first gear extreme .. race to be given other wise you will feel the factor that your engine will be off after leaving clutch in first gear
    totally fed up feeling to sale this bike

    any one can share the idea how to tatckle this problem

    Originally posted by vdarshan View Post
    Hi guys,

    Need your help.

    I have a 2010 CB Unicorn(47k on odo), yesterday I changed my tyres as a set for the first time in 7 years, choose Michelin Sirac street (Front 2.75-18 & Rear 100/90-18).

    As soon as I started riding I noticed strange rubbing sound/ vibrations at footpeg exactly at 22kmph "only" (not on any other speeds) on the speedo. I tried depressing the clutch, coasted in neutral same problem. I checked for any scarping marks on tyre, none!

    I went to tyre shop this morning. He came pillion with me suddenly vibes were not present. Again I rode single, vibes were back at 22kmph, I was dumb struck. He said there is no problem with tyres, vibes might be due to chain as the new tyre has deeper tread buttons is extended upto 8mm in height vs old tyre.

    Might the issue be with Chain slider/chain(replaced @36k kms)? Chain wear indicator is at extreme left(refer pic).[ATTACH]225294[/ATTACH]

    Still I havnt found the solution. Can you please throw some light into the issue.

    Comment

    • #3362
      Re: Honda Unicorn

      Hello dear friends..I have a unicorn 150 2016 model run 26000km.I just cleaned the carburettor today.but I didn't note down the number of turns when I removed the air screw for cleaning. Now I am confused what is the factory setting of number of turns of the air screw. Given that I didn't rotate the idle RPM adjuster screw, at what number of turns should I keep the air screw for factory setting.

      Comment

      • #3363
        Re: Honda Unicorn

        Originally posted by babumon123 View Post
        Hello dear friends..I have a unicorn 150 2016 model run 26000km.I just cleaned the carburettor today.but I didn't note down the number of turns when I removed the air screw for cleaning. Now I am confused what is the factory setting of number of turns of the air screw. Given that I didn't rotate the idle RPM adjuster screw, at what number of turns should I keep the air screw for factory setting.
        1.5-1.75 turns out

        Comment

        • #3364
          Re: Honda Unicorn

          Thanks dear.
          Originally posted by sreejesh613 View Post
          1.5-1.75 turns out

          Comment

          • #3365
            Re: Honda Unicorn

            Anybody else confirm this please

            Comment

            • #3366
              Re: Honda Unicorn

              There will be a slight difference between different machines. It also matters how much load its pulling, condition of air filter, the sp and engine oil. But yes, figure would be something between 1.5 to 2.5. First put at 1.5, ride a km or so, see how it feels. You will know immediately if the bike likes it or not. Turn to 1.75 and ride again. 1/4 turns at a time. Carry a small screwdriver with you. Engine needs to be warm though, to get an ideal setting. If done on a cold engine the rpm will go upto 3-4k idle speed when hot.
              Originally posted by babumon123 View Post
              Anybody else confirm this please

              Comment

              • #3367
                Re: Honda Unicorn

                Thank you very much brother.
                Originally posted by Vipergts07 View Post
                There will be a slight difference between different machines. It also matters how much load its pulling, condition of air filter, the sp and engine oil. But yes, figure would be something between 1.5 to 2.5. First put at 1.5, ride a km or so, see how it feels. You will know immediately if the bike likes it or not. Turn to 1.75 and ride again. 1/4 turns at a time. Carry a small screwdriver with you. Engine needs to be warm though, to get an ideal setting. If done on a cold engine the rpm will go upto 3-4k idle speed when hot.

                Comment

                • #3368
                  Re: Honda Unicorn

                  Can anybody share their carburettor tuning experience in unicorn 150.

                  Comment

                  • #3369
                    Re: Honda Unicorn

                    Isn't that what I explained in the last post? What do you need exactly?
                    Originally posted by babumon123 View Post
                    Can anybody share their carburettor tuning experience in unicorn 150.

                    Comment

                    • #3370
                      Re: Honda Unicorn

                      So if we turn the air screw clockwise the the mixture will become lean right??..I tried first setting idle RPM to 3000, then slowly turning the air screw till a constant rpm is reached, then again adjust the idle RPM screw to 1400. Is it correct method. I did tuning because my unicorn has missing after cold start. Also what is your opinion about fuel system cleaner.
                      Originally posted by Vipergts07 View Post
                      Isn't that what I explained in the last post? What do you need exactly?

                      Comment

                      • #3371
                        Re: Honda Unicorn

                        You must have already googled it, that's the ideal method to get the correct AF mix for any carb. Works great if it works. I usually follow the method mentioned above. I know its not ideal, but it works for me.

                        Have been on shell full synth for the past 2 yrs. Recently I got the Mobil super moto 10w40 along with the stp moto booster. The stp surprisingly worked really well and the smoothness was surprising for my 12 yr 65k kms odo. Decided to try it after seeing it in yt. But an adjustment to the afr maybe be needed post usage of the stp cleaner. The fuel quality also affects the afr, specially for an old bike. This has been my experience.
                        Originally posted by babumon123 View Post
                        So if we turn the air screw clockwise the the mixture will become lean right??..I tried first setting idle RPM to 3000, then slowly turning the air screw till a constant rpm is reached, then again adjust the idle RPM screw to 1400. Is it correct method. I did tuning because my unicorn has missing after cold start. Also what is your opinion about fuel system cleaner.

                        Comment

                        • #3372
                          Re: Honda Unicorn

                          Keep a note of the number of turns done by you. Track the mileage for a tankful or 2. If you are happy with it then, stick to it for the future. Remember the factors mentioned earlier affect afr substantially.

                          Comment

                          • #3373
                            Re: Honda Unicorn

                            i am going to change the stock tyres as they are worn out .am planning to go for 110 90 18 tyres for the rear ..do they fit in correct without any problem ?
                            and am also intrested in tail tidy and half frame chain cover does any one have any suggestions ?

                            Comment

                            • #3374
                              Re: Honda Unicorn

                              1 size is usually not a problem in any bike. So 110 should be fine. Decided on make and brand yet?
                              Originally posted by Arjunkalyanram View Post
                              i am going to change the stock tyres as they are worn out .am planning to go for 110 90 18 tyres for the rear ..do they fit in correct without any problem ?
                              and am also intrested in tail tidy and half frame chain cover does any one have any suggestions ?

                              Comment

                              • #3375
                                Re: Honda Unicorn

                                Hi can anyone post a photo of the carburettor air screw with washers, O-ring and spring. Does it have a metal washer and 2 O-rings?? My carburettor has only one O-ring and a spring only. No metal washer. Don't know if it was lost

                                Comment

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