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Kawasaki Ninja 250R

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  • Originally posted by ditto View Post
    The mechanic could not make it yesterday evening. I took her to the workshop this morning.

    The first thing checked were any sensor malfunction but nothing found there. The fairings were opened and the next check was for the spark plugs. The stick coil on the right side was found loose. It wasn't out all the way but was moving up and down just by the flick of a finger. It didn't fit correctly while trying to press it down. The spark plug was then removed and connected to the stick. It fit correctly with gentle persuasion. The spark plug was put back in and the stick coil over it and it just fit back into place.

    Final diagnosis: Due to the stick coil coming undone/loose, one of the cylinders might not be firing correctly. At higher RPMs since the vibrations were higher and the stick coil maybe moved up and down a bit more, the problem was more obvious. The mechanic said at higher RPMs there would me more sparking which was causing the jerk while riding. Rode another 10 KMs at high RPM after the fix and everything looks good for now. I am again.

    Thanks BV for your quick response and the exhaustive checklist which I took with me to the workshop, planning to go through it one by one. I was lucky the problem was diagnosed quickly though and didn't have to do the whole drill.
    You're welcome, and I'm happy that it turned out to be a minor issue!

    Comment


    • Originally posted by The Celebrity View Post
      Hey! you are at Tvm?! How long are you going to be here?! We could meet up and go for a ride... If you are staying long enough, why don't you join us for the G2G on Saturday?!
      after landing at trivandrum i am caught up in my office like mad. that includes saturdays. as i expect to be at trivandrum now we will meet. my office commitments had infact put a temporary pause to my weekends. hopefully i expect things will be streamlined soon.(one reason not posting in Trivandrum G2G till date)

      keep me posted on saturdays G2G time location by PM or i will see the Triv G2G thread.
      Mountain biking on impulse with my wife and our bike goes down in water

      http://www.xbhp.com/talkies/tourer/2...own-water.html

      my saddle sore 1600k is official - the story

      http://www.xbhp.com/talkies/tourer/2...ddle-sore.html

      my space
      www.harikesh.com

      Comment


      • Originally posted by bluevolt View Post
        The Ninja 250R is a complex machine, so it could be a variety of things though I do not guarantee that it is the cause:

        1) Sub-throttle sensor malfunction or other sensor malfunction.
        2) ECU problem
        3) Mechanical issue with main throttle body,ie, not enough fuel to injectors(the throttle action not leading to proper/closing of the throttle chamber valves), or holder for the assembly is loose.
        4) Spark plug or stick coil problem (the long thing which is over the spark plugs). But you can check the plugs by removing the tank, attaching the plugs to the stick coil and check the spark by touching it against the metal frame briefly.
        5) Battery voltage or connector issue.
        6) Sticky gears - clutch cable not lubricated properly, or throttle cable not turning the spring loaded rotator attached to the throttle body assembly below the seat.
        7) Incorrect valve clearances
        8) Incorrect timing chain tension.
        9) Fuel line obstruction.

        Unfortunately, most of the things above can be checked only at a workshop so you have to take it there anyway.

        Let us know how it went.
        Originally posted by bluevolt View Post
        Sounds like one of the following reasons:
        1) Fuel flow problem or fuel/air mixture problem.
        2) Throttle body issue
        3) Sensor issue - sensor not reading/transmitting throttle inputs correctly.

        But let us know the outcome. Could be something much more simpler.
        I SALUTE you and your knowledge BlueVolt

        Comment


        • hello every1
          any1 having heating problem???
          The radiator fan was constantly on nd d temp needle was all 3/4 way up hot

          l8r i noticed sum dirt on radiator so washed it out .

          could it b coz of d dirt or sumthing else???

          thnx in advance

          Comment


          • ^^^ Don't worry, it is very normal for the temperature needle to stay at 3/4 level and for the fan to be constantly on during bumper to bumper traffic (not always but mostly). About the dirt, it does make a difference when the radiator is kept clean so i'd suggest you to clean it when its covered in mud! (firstly before cleaning make sure the bike has cooled down fully and wet the radiator so that it becomes easier to clean it with a small brush afterwards [delicate vertical strokes])
            http://www.facebook.com/therealabhinav?ref=profile

            Comment


            • Originally posted by ditto View Post
              The mechanic could not make it yesterday evening. I took her to the workshop this morning.

              The first thing checked were any sensor malfunction but nothing found there. The fairings were opened and the next check was for the spark plugs. The stick coil on the right side was found loose. It wasn't out all the way but was moving up and down just by the flick of a finger. It didn't fit correctly while trying to press it down. The spark plug was then removed and connected to the stick. It fit correctly with gentle persuasion. The spark plug was put back in and the stick coil over it and it just fit back into place.

              Final diagnosis: Due to the stick coil coming undone/loose, one of the cylinders might not be firing correctly. At higher RPMs since the vibrations were higher and the stick coil maybe moved up and down a bit more, the problem was more obvious. The mechanic said at higher RPMs there would me more sparking which was causing the jerk while riding. Rode another 10 KMs at high RPM after the fix and everything looks good for now. I am again.

              Thanks BV for your quick response and the exhaustive checklist which I took with me to the workshop, planning to go through it one by one. I was lucky the problem was diagnosed quickly though and didn't have to do the whole drill.
              i had a real look on the insides of my bike only during the second service. the most important thing that struck me was that the wiring and cabling ( including the stick coil) etc would be highly vulnerable to power water wash like service stations. may be one should be extra cautious in washing the ninja from service centers. it is better to leave some dirt rather than getting caught on the wrong foot at the wrong time.
              Mountain biking on impulse with my wife and our bike goes down in water

              http://www.xbhp.com/talkies/tourer/2...own-water.html

              my saddle sore 1600k is official - the story

              http://www.xbhp.com/talkies/tourer/2...ddle-sore.html

              my space
              www.harikesh.com

              Comment


              • Hi Guys,

                A friend of mine is picking up a used ninja (and from a different state). i would be accompanying him to check the condition of the bike. The bike has around 6K on the ODO.
                Since the bike is in a different state, we cannot take any trusted mechanic to the place and need to check it out ourself.
                can you guys help me on the things that i need to check, before picking it up. like how to identify stuff that could be tampered?

                Comment


                • Originally posted by snapppy View Post
                  can you guys help me on the things that i need to check, before picking it up. like how to identify stuff that could be tampered?
                  Since the bike has not run much you shouldn't be overly worried about the condition of the engine/suspension etc.

                  Pay attention to the plastics, such as fairings, tail pieces, front cowl, etc. If the bike has had a fall it would have scratches at the very least (a touchup would be visible at close view) and probably some misalignment too.

                  Also look at the wheels and see if there is any damage. Pay attention to the tires for uneven wear and tear. Chicken strips are ok but uneven wear and tear is not which could signify some stunting, burnouts, improper braking (lockup of wheels leading to patchy tires), etc.

                  Inspect the bike closely. Let the bike crank and listen to the engine note at idle. Keep an eye on the temp gauge and warning lights. Unnecessary heating could point to a badly maintained bike and/or excessive wear and tear / improper maintenance on the cooling system.

                  Revv at idle to identify vibrations and zero in on the area where the bike is giving out these vibrations and try and identify if its a minor issue (rattling of plastics due to loose bolts or a misaligned piece due to a fall, etc.).

                  Take a short ride and dont revv hard. Ride sedately and listen to the sounds. You should be able to spot any issues here. Take another ride and revv slightly harder to check if the bike behaves normally (to iron out fuel / power delivery issues). Check suspension/swingarm alignment by riding zig zag in a controlled manner. Check all electricals and battery.

                  Ask for detailed service history. Check brake pad thickness. For 6k kms it should still be on its first set and due for replacement soon. Tires would last around 13k kms or more so they should be in good condition.

                  Hope this helps.
                  ATGATT - Because hospital ceilings are boring !!!

                  Comment


                  • Originally posted by n_aditya View Post
                    Since the bike has not run much you shouldn't be overly worried about the condition of the engine/suspension etc.

                    Pay attention to the plastics, such as fairings, tail pieces, front cowl, etc. If the bike has had a fall it would have scratches at the very least (a touchup would be visible at close view) and probably some misalignment too.

                    Also look at the wheels and see if there is any damage. Pay attention to the tires for uneven wear and tear. Chicken strips are ok but uneven wear and tear is not which could signify some stunting, burnouts, improper braking (lockup of wheels leading to patchy tires), etc.

                    Inspect the bike closely. Let the bike crank and listen to the engine note at idle. Keep an eye on the temp gauge and warning lights. Unnecessary heating could point to a badly maintained bike and/or excessive wear and tear / improper maintenance on the cooling system.

                    Revv at idle to identify vibrations and zero in on the area where the bike is giving out these vibrations and try and identify if its a minor issue (rattling of plastics due to loose bolts or a misaligned piece due to a fall, etc.).

                    Take a short ride and dont revv hard. Ride sedately and listen to the sounds. You should be able to spot any issues here. Take another ride and revv slightly harder to check if the bike behaves normally (to iron out fuel / power delivery issues). Check suspension/swingarm alignment by riding zig zag in a controlled manner. Check all electricals and battery.

                    Ask for detailed service history. Check brake pad thickness. For 6k kms it should still be on its first set and due for replacement soon. Tires would last around 13k kms or more so they should be in good condition.

                    Hope this helps.

                    Why don't you just check the bike's history at the local PBK?

                    The bike must be about a year old-tops and since only the PBK's do service, just take it there - or am I missing something?

                    ---------------------------------------------------------------------

                    In a universe of men and machines, there is an individual who achieves the purest confluence of both worlds where he and the machine must become one - He is The Biker!

                    Comment


                    • The engines are pretty bullet proof.. So unless the owner has done something extremely bad with his bike.

                      Check the front radiator fins. should be all straight ( high pressure water can bend/damage them ).


                      My offerings to the gods of speed -

                      - KTM Duke 200
                      - Yamaha RXZ 5 speed


                      Comment


                      • Thanks for the detailed tips guys. would help a lot.
                        my only worry is it should be an accident free bike. how do i verify for it?

                        @Sunnyside_up: checking with the local PBK is an option but not completely trust-worthy. since the guy is a local there, he can very much handle the PBK guys to give the report in his favour. I am not saying he will do that, but its an option.

                        Comment


                        • ninja hunter

                          hey folks.....im strikepackage im looking for a used N250R,green...gud condition.the price ....well if i like the bike, then the asked price will be given and dont worry abt IDVs as a buyer i will asker for lesser nyways want a fair deal for the seller as well so lets c.....im from chennai.would be gr8 if the bike is from chennai it self.and folks rest assured ur ninja will be taken care off........
                          regards
                          strikepackage.

                          Screw your courage to the sticking place.

                          Comment


                          • Need some help please..........

                            Recently I've been experiencing a lot of pulsing with the front brake when applied at slow speeds, lets say slow moving traffic. I've done around 4800kms, feel the engine oil needs to be changed as she does not feel the same, has a bit of vibes and also need to clean the Air Filters.

                            I guess I can get the engine oil changed and the air filter cleaned at a local mechanic's garage right, or should go to PBK? I also needs some insights on why is do I feel the pulsing effect when I brake at slow speeds?

                            Cheers,
                            Krish
                            Biking knows no language but Passion..............................
                            sigpic

                            Comment


                            • Originally posted by kiran_borra View Post
                              I SALUTE you and your knowledge BlueVolt
                              Thank you Kiran! But I learned from experience - 25,000 kms on your bike gives the owner a lot of that!


                              Originally posted by Professor Biker..... View Post
                              I also needs some insights on why is do I feel the pulsing effect when I brake at slow speeds?

                              Cheers,
                              Krish
                              How much of the front brake pads you've got left?

                              Comment


                              • Originally posted by strikepackage View Post
                                im from chennai.would be gr8 if the bike is from chennai it self.
                                Check your PM.
                                ATGATT - Because hospital ceilings are boring !!!

                                Comment

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