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Weird issues with my bike. Help!

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  • #1

    Weird issues with my bike. Help!

    Hey guys,

    I have a Pulsar 135 LS, and it has done about 890 kms. It is about 3 months old. (Use it to go to my class which is about 1 km from my place, and at times, go on spirited rides for 30-40 kms, thats all).

    Of late, this new issue has cropped up. I always use the kick start when starting the bike for the first time in the day. When i kick started it two days back, the bike started, and the rpm went up automatically to 4k on its own, stayed there for 3-4 seconds, then came back to about 1k, and then the bike turned off. I started it again (kick), and it started, and this time, it seemed okay. The bike rode well after that too, no issues.

    I thought it must've been due to my applying throttle by mistake, and dismissed it. But it happened today as well! same issue, the rpm rose to 4k and my hands were off the accelerator!. I started it again, this time it was pretty normal, was hovering at 900-1k and turned off. Started again, and this time it hung on, and the bike rode without problems.

    Basically, there are no problems with the ride, she rides fine, no issues with the riding so far. But this issue has me worried. it didn't happen when I started her yesterday. It happened only day before and today. What's the problem guys?

    And secondly, how hot should the engine be after a small ride? I rode the bike for about 20 minutes, both spirited driving (65 kmph) and bumper to bumper traffic, and when i came back home, i could just touch the engine for about 1 second, it was too hot after that. Is it normal? I am new to bikes, and hence, am not quite sure, and am afraid if my engine is overheating.

    Hope you guys help out.
    Tags: None
  • #2
    Query Approved.
    :)

    Comment

    • #3
      I guess you have accidentally left the choke on!
      Check it once.
      Quench my thirst with gasoline!

      Comment

      • #4
        Sorry for my dumb question, but where can I find this choke?

        Comment

        • #5
          May be there is problem with the accelerator cable........ It jams some times get it checked once...
          All the wise men of the world are called wise only after they spoke their mind, so dont keep the ideas to yourselves!

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          • #6
            Originally posted by nateriver View Post
            Sorry for my dumb question, but where can I find this choke?
            I do not know about Pulsar's choke, but I very strongly suggest to read & understand the motorcycle's owners manual. This is very important, so pls do not take it lightly. Though you may find some routine boring stuff, there WILL be some info that you may not be aware. So pls read & understand the owners manual.
            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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            • #7
              Does 135LS comes with Auto choke? If yes then, it is functioning and you should'nt be worried at all.

              Choke in newer Pulsar's is plonked directly into CARB. But, I assume that you have an auto choke variant and thus you will not see any choke.

              Comment

              • #8
                THe pulsar 135 has an auto choke in its carb which automatically will raise the throttle accordingly to warm up the engine during cold starts. The rise in rpm is normal as the engine is getting warmed up and then return to normal idling. Since you mentioned that the bike runs normally without problems after that, the auto choke does disengage after the engine is somewhat warmed up. I am not sure though whether the engine is supposed to shut off.

                Also I am not sure whether 4k rpm is bit high for the engine to be running on choke. Have the auto choke checked at your service center soon. There might be an issue, or might not be.

                P.S
                Pulsar engines are known to run on the hotter side (since the run lean), and yeah most engines in city riding become hot enough that you cant touch the engine even for a short while. If you're still in doubts just keep an eye on the engine oil level , check every 3 days
                Last edited by Xenologik; 06-11-2010, 07:39 PM.
                A man's testosterone level is directly proportional to bhp that he's using on his motorcycle.

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                • #9
                  @netriver: As the engine is new it will feel Hotter than a 2500kms old bike. As the parts are new the friction between them is also greater. The heat will reduce as the parts get settled and engine will run then alot smoother + peppy.

                  Originally posted by Xenologik View Post
                  Also I am not sure whether 4k rpm is bit high for the engine to be running on choke. Have the auto choke checked at your service center soon. There might be an issue, or might not be.
                  No issues! An autochoke works that way only, it will raise the throttle to 4K by increasing the amount of fuel entering and thereby reducing the air content in the AFR.
                  Last edited by abhichotu.abhi; 06-11-2010, 07:43 PM.

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                  • #10
                    So it is not something to be worried about? The weather is quite cold here due to the rains. Could that be a reason? Am sorry about the numbe of questions, but it's a new bike, and it got me worried

                    Comment

                    • #11
                      ^^ Infact, you must be happy that your autochoke is working like a charm. In most of the bike autochoke doesnot functions as it should be, it's now or then people have experienced problems with that. And you are complaining about it's right working.

                      Comment

                      • #12
                        My question is, why is it getting engaged in the first place? It has never kicked in all these days. Why does it get engaged?

                        Comment

                        • #13
                          Originally posted by nateriver View Post
                          My question is, why is it getting engaged in the first place? It has never kicked in all these days. Why does it get engaged?
                          Simple, The temperature at the time of morning is low(especially in winters) and fuel such as petrol requires an optimum temperature before burning completely. The temperature that is required to burn petrol at the time of cold weather is not appropriate thus the choke provides a richer mixture by increasing the supply of petrol and reducing air supply. As soon as the bike starts the fuel gets a base to achieve its temperature before vapourising and burning.
                          It might be that mornings earlier were sunnier enough to prevent engaging of autochoke.
                          Last edited by abhichotu.abhi; 06-11-2010, 11:16 PM.

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                          • #14
                            Autochoke is temperature sensitive. The temperatures in your area may be low enough now, when you are starting, so the autochoke engages. Petrol does not evaporate easily in a cold engine. Therefore a choke is needed to lower the air pressure and increase the ratio of fuel entering the cylinder. This helps in starting and sustaining the engine when it is cold.

                            After being at 4k RPM for some time, (1) the oil is warmed and has become less viscous, (2) oil is pumped to different parts of the engine (esp. cam, tappet area) , (3) flow has been established in the carby, (4) Engine assembly has warmed and fuel vaporisation is easier.

                            Just apply a little throttle around the time you expect the RPM to drop from 4k to prevent the engine from turning off.
                            Last edited by Ayson; 06-12-2010, 12:47 AM.

                            Comment

                            • #15
                              it is definitely the autochoke......functioning..........and its very normal.....on the contrary ............you should be happy...........very happy.....that the autochoke is functioning properly on your bike.................

                              Note: Don't ride your bike too fast, the engine is still new.
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