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Honda CBR 250R

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  • #22366
    Re: Honda CBR 250R

    Today I installed MRF MASSETER for rear tyre on my ROSY. Initial feedback is good, drive very smoothly, does good cornering in city, braking lacks a bit(due to being fresh), feels lighter compared to stock CONTIGO! Less shoulder pain.

    Drove it for 80 odd Kms. Very good detailing, thread seems to perform good on highway, not so good in city(on dirt, gravel).

    Gives very good confidence on high speed, helps in cutting lanes much more than stock.

    If you are planning to use your CBR for daily drive and occasional long trips, I would highly recommend this being affordable and completing all necessary requirements for touring.

    I found not soo soft compound as mentioned in some articles. It was a tough decision to choose between Radial and Bias ply. Still pointing down my personal requirements, I went ahead with this.

    Got it for 3880 and also did wheel balancing too.

    Its not the Bike that makes a Biker perfect, its a Biker who makes his Bike perfect :)
    Connect with me on Facebook - https://www.facebook.com/MahapatraAbhijeet

    Comment

    • #22367
      Re: Honda CBR 250R

      Guys, what is this screw? That disc twists as throttle is given and whacks against it when we let go of the throttle. Is this the idle control?
      Last edited by leech; 09-23-2017, 01:06 AM.

      Comment

      • #22368
        Re: Honda CBR 250R

        Originally posted by leech View Post
        Guys, what is this screw? That disc twists as throttle is given and whacks against it when we let go of the throttle. Is this the idle control?
        Yes that's the plate stopper screw, they are calibrated at the factory level so the idle remains the same irrespective of what the ECU controls and they are NOT MEANT to be filled with, unlike the normal spring loaded ones which can be adjusted

        Cheers!
        VJ
        Once upon a time, a guy asked a girl 'Will you marry me?'
        The girl said, 'NO!'


        And the guy lived happily ever after and rode motorcycles and watched sport on a big screen TV, went fishing and surfing, and played golf a lot, and drank beer and scotch and had tons of money in the bank and left the toilet seat up and farted whenever he wanted.


        THE END

        Comment

        • #22369
          Re: Honda CBR 250R

          Originally posted by alliwanted View Post
          Today I installed MRF MASSETER for rear tyre on my ROSY. Initial feedback is good, drive very smoothly, does good cornering in city, braking lacks a bit(due to being fresh), feels lighter compared to stock CONTIGO! Less shoulder pain.

          Drove it for 80 odd Kms. Very good detailing, thread seems to perform good on highway, not so good in city(on dirt, gravel).

          Gives very good confidence on high speed, helps in cutting lanes much more than stock.

          If you are planning to use your CBR for daily drive and occasional long trips, I would highly recommend this being affordable and completing all necessary requirements for touring.

          I found not soo soft compound as mentioned in some articles. It was a tough decision to choose between Radial and Bias ply. Still pointing down my personal requirements, I went ahead with this.

          Got it for 3880 and also did wheel balancing too.
          Is this far better than contigo? For grip and breaking?

          NOTE: Remove pics before quoting a post with picture set.
          Last edited by B7ACKTHORN; 09-23-2017, 09:12 AM.

          Comment

          • #22370
            Re: Honda CBR 250R

            Originally posted by Pavithranmt View Post
            Is this far better than contigo? For grip and breaking?
            Yes it is much better than those contigo's. Being a bias ply I am not feeling any drastic change in day to day usage. Handling has become very light, still feels heavier in front due to stick tyres.

            Braking - not impressed. Still it's too early to say about braking as they are fresh and need time to set. Even the rear calliper will take some time to adjust and continuous pumping has to be done.

            I am soon planning to change front, any suggestion?
            Its not the Bike that makes a Biker perfect, its a Biker who makes his Bike perfect :)
            Connect with me on Facebook - https://www.facebook.com/MahapatraAbhijeet

            Comment

            • #22371
              Re: Honda CBR 250R

              @ VJ, hmm, I wonder why they made the throttle stop with a nut if they didn't want anybody messing with it.

              What will happen if we loosen/tighten that nut?

              Comment

              • #22372
                Re: Honda CBR 250R

                All right, I've adjusted that throttle stop screw, loosened it up until the throttle stop plate does not touch the screw when the throttle is closed. It made no difference to the idling rpm at all.

                What changed is this - when clutch is pulled in while the bike is in motion, the idle rpm drops down below 1500 rpm often. This lead to the bike stalling 3/6 times after I pulled the clutch in when the bike is at speed.

                Comment

                • #22373
                  Re: Honda CBR 250R

                  This is my current chain slack. Is it in real bad shape?



                  Comment

                  • #22374
                    Re: Honda CBR 250R

                    Originally posted by hypheni View Post
                    This is my current chain slack. Is it in real bad shape?



                    Looks like its in a bad shape. I think so

                    Comment

                    • #22375
                      Re: Honda CBR 250R

                      [MENTION=57101]hypheni[/MENTION] - check the chain slack using a ruler on the middle of the chain. It should be below 2 inches, which is the point in which it can damage the swing arm. From your picture I think it's more than 1.5 inch, but I could be wrong.

                      Adjust the chain a bit later, when the chain slack on the tightest part is beyond 1.6 inch.

                      Comment

                      • #22376
                        Re: Honda CBR 250R

                        Originally posted by leech View Post
                        [MENTION=57101]hypheni[/MENTION] - check the chain slack using a ruler on the middle of the chain. It should be below 2 inches, which is the point in which it can damage the swing arm. From your picture I think it's more than 1.5 inch, but I could be wrong.

                        Adjust the chain a bit later, when the chain slack on the tightest part is beyond 1.6 inch.
                        Yeah I will have to check it with ruler. Lazy to use the ruler and thus posted here. I will re-post here with more closer pics of the chain and sprocket. The service engineer at Honda already told me to change the set 6months back, but I believe that's totally their business policy.

                        Comment

                        • #22377
                          Re: Honda CBR 250R

                          Originally posted by leech View Post
                          @ VJ, hmm, I wonder why they made the throttle stop with a nut if they didn't want anybody messing with it.

                          What will happen if we loosen/tighten that nut?
                          Stoppers doesn't mean they are present there so that somebody can fiddle with it. If you can look closely it's not at all a screw that's supposed to be adjusted nor fiddled with, unlike adjustable screws that you see elsewhere that are spring loaded in normal carburettors. These are present so that the electronics, the sensors in the TB are calibrated or the desired RPM is acheived.

                          Originally posted by leech View Post
                          All right, I've adjusted that throttle stop screw, loosened it up until the throttle stop plate does not touch the screw when the throttle is closed. It made no difference to the idling rpm at all.

                          What changed is this - when clutch is pulled in while the bike is in motion, the idle rpm drops down below 1500 rpm often. This lead to the bike stalling 3/6 times after I pulled the clutch in when the bike is at speed.
                          Right. That screw isn't necessary, as the butterfly valve inside the throttle body itself will do the job. But another aspect as to what happens here is the factory sets a specific limit as to how much the butterfly should be slightly opened with the stopper in place plus the TPS sensor calibration can go in for a sensor is fiddled with. In your case, the after results can be related to a tossed up sensor settings.

                          Cheers!
                          VJ
                          Last edited by B7ACKTHORN; 09-26-2017, 09:30 AM.
                          Once upon a time, a guy asked a girl 'Will you marry me?'
                          The girl said, 'NO!'


                          And the guy lived happily ever after and rode motorcycles and watched sport on a big screen TV, went fishing and surfing, and played golf a lot, and drank beer and scotch and had tons of money in the bank and left the toilet seat up and farted whenever he wanted.


                          THE END

                          Comment

                          • #22378
                            Re: Honda CBR 250R

                            Originally posted by B7ACKTHORN View Post
                            Stoppers doesn't mean they are present there so that somebody can fiddle with it. If you can look closely it's not at all a screw that's supposed to be adjusted nor fiddled with, unlike adjustable screws that you see elsewhere that are spring loaded in normal carburettors. These are present so that the electronics, the sensors in the TB are calibrated or the desired RPM is acheived.



                            Right. That screw isn't necessary, as the butterfly valve inside the throttle body itself will do the job. But another aspect as to what happens here is the factory sets a specific limit as to how much the butterfly should be slightly opened with the stopper in place plus the TPS sensor calibration can go in for a sensor is fiddled with. In your case, the after results can be related to a tossed up sensor settings.

                            Cheers!
                            VJ
                            Oh, so despite ECU we still have to rely on a ₹5 screw to make sure the bike idles properly. [emoji53]

                            I was of the opinion that the ECU, which can make calculations in a millisecond, would never allow the bike to idle below 1500 rpm, but it's not the case. The bike sometimes idles poorly, causing stalling in traffic. This stalling happens only when the engine is hot, clutch is pulled in, like bumper to bumper traffic.

                            Comment

                            • #22379
                              Re: Honda CBR 250R

                              [MENTION=58594]leech[/MENTION] I think remember seeing a post of yours regarding the FE correlated to higher octane fuel and engine oil grade plus normal fuel with stock Honda throttle oil, the latter obviously giving better FE but here's my question, is it fine for the engine using the higher octane, I know my fuel pump should be fine but I'm just wondering if it's overkill for the engine?

                              Comment

                              • #22380
                                Re: Honda CBR 250R

                                Originally posted by Deathwing View Post
                                [MENTION=58594]leech[/MENTION] I think remember seeing a post of yours regarding the FE correlated to higher octane fuel and engine oil grade plus normal fuel with stock Honda throttle oil, the latter obviously giving better FE but here's my question, is it fine for the engine using the higher octane, I know my fuel pump should be fine but I'm just wondering if it's overkill for the engine?
                                My experience in higher octane fuels is limited; however, I have heard of two cbr250 owners complaining of clogged injectors due to the usage of so called "premium" fuels. Apparently they got stranded on the road.

                                It appears that most of the premium fuels are just normal fuel with additives; use only Speed97 or Shell Vpower from a popular bunk if you wish.

                                Comment

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