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Pulsar 150 classic Engine vibrates too much

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  • #1

    Pulsar 150 classic Engine vibrates too much

    Hi guys.. I have a pulsar 150 classic model(2003).....Just a couple of years back reboring was done..now the problems are..

    1) NO power,,pickup has dropped very much

    2) Engine starts to vibrate too much at just 80kmph,,,or 6k RPM...any more than that..the engine starts to rattle.........

    These are the 2 main problems......and i am yet to contact the mechanic yet..thought would gather some knowledge before going out....So what might be the problem and pls give me some soultions...and moreover my budget is not very high..so putting in a new piston/bore kit...is not an option..and also im noot looking for major performance upgrade..just trying to put it back to its formewr glory...So pls help...
    Last edited by hgaaditya; 03-14-2012, 09:28 AM.
    If u can't explain it to a six year old; You don't understand it yourself!!
    Tags: 150, classic, engine, pulsar, vibration
  • #2
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    • #3
      for vibrations check engine foundation bolts and also check the condition of balancer.

      other than that since you also report no power pick-up etcc. may be its time to do complete engine overhaul. get the crank job done.
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      • #4
        Originally posted by princesirohi View Post
        for vibrations check engine foundation bolts and also check the condition of balancer.

        other than that since you also report no power pick-up etcc. may be its time to do complete engine overhaul. get the crank job done.

        hi,
        could you please tell me what is crank job?

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        • #5
          A quick update here guys..

          Thanks for the Quick approval....

          Had gone to the mechanic today, explained the problem to him, and to my surprise there was just about 200 ml of oil left in the engine...and that too black.....
          So got it replaced ,,he said its Shell AX5..dunno if its good or not.. i had told him that i wanted SS...and he told me that AX5 is SS,,,but after comin home..i found out that its a mineral oil...so will change it a bit early...So pls suggest any good SS oil for pulsar within 350 rs range...

          The guy says that all the old pulsars are same and vibration is common in them ..nothing can be done to decrease it.....So should i change my mechanic??? or is it true that nothing can be done...i mean atleast the bike should go upto 80kmph without rattling like that...am i not right?????

          One more thing the vibrations have reduced about 20% after the oil change........But 80% is still there and it vibrates a lot......Any other advice is always welcome thank you...
          Last edited by hgaaditya; 03-14-2012, 09:37 AM. Reason: Typing errors,,and few more doubts...
          If u can't explain it to a six year old; You don't understand it yourself!!

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          • #6
            hi there, me had same problem after reboring my pulsar classic(2005) and due to which my top speed was 75kmpl and pickup was very bad, i changed my mechanic and got it checked after almost an year what i found was 2 things:

            1. My pickup was dead and top speed too, so i went to get that correct first. There is a rubber cap called parachute in the carb which makes pressure was gone and it had about 8-10 hones in it, which means the pressure created by the engine for pick up leaks away and thus pick up gets down and it was difficult to find original in the market but after trying almost every shop i found one and get it fitted. (Make sure you get same and original one). After fitting that my bike is like rocket literally.. top speed is 108 and pick up is as good as u can expect from a 150cc engine...

            2.My new mechanic told me that my old mechanic who done all the "boring" work was unable to build pressure in the engine due to which engine responsiveness is less..Which might be another reason for your vibrations..

            Hope it might help
            Pulsar 150 (2005 Owned)
            Pulsar 220 (2011 Owned)

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            • #7
              Did some search on Xbhp and some other websites and found out that..if the pickup has dropped and the kick start goes down without much effort.... than the piston rings might be gone...I think that might be my prob for the loss of pickup....Still no idea on vibration...

              By the way can anyone tell me how much does it cost to get the whole set of rings replaced???

              And pls tell me any good SS oils for my bike....
              If u can't explain it to a six year old; You don't understand it yourself!!

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              • #8
                hgaaditya

                That clearly says that (post number 1 &7 ), you are having a very week compression. the reason can be both worn compression rings or a poor bore.
                If the case is only about the compression ring then you can replace it or else you will need to source a new C-ring or else a new bore.

                Loss in compression can result in increased vibration levels.

                And how is the smoke from your exhaust?
                Presence of MIND and self CONFIDENCE is the primary aspect You need to be on road, not what brand your riding gears are.
                If you lack these two then DONT

                Feel the pleasure of Ultimate Biking
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                • #9
                  I havent noticed any smoke from the exhaust,,but havent observed properly.....Will make some more observetions and will report about any smoke issues......But thanks for the quick replies and information....It has really helped a lot...
                  If u can't explain it to a six year old; You don't understand it yourself!!

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                  • #10
                    hgaaditya

                    I use motul 5100 ester (15W50) Semi Synthetic, its good.

                    And i suggest you take it to a authorised service centre, there might be a cost difference, but you can always make them do it the perfect way.

                    Kindly ask them to check your bike completely, running on 200ml oil doesnt really sound good.
                    Last edited by ARNandal; 03-18-2012, 06:52 PM. Reason: Type error corrected to Motul 5100 Ester 15W50 SS
                    Presence of MIND and self CONFIDENCE is the primary aspect You need to be on road, not what brand your riding gears are.
                    If you lack these two then DONT

                    Feel the pleasure of Ultimate Biking
                    __________________________________________

                    . . .                     alwayzaLive . . .

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                    • #11
                      URGENT!!!!! pls reply fast!!!

                      Guys took m bike to another mechanic today,,and he opened up the engine,,,and told that the clutch plates and gear spring had to be replaced,

                      He also told that he has to cut out grooves in the clutch bell in order to allow the oil to flow..He said may be 4-5 grooves needed to be cut...
                      so i am woried that cuting grooves would make the bell weaker,,so i need ur suggestions as soon as possible,,,Pls reply quickly..

                      Any advice is welcome...Thank you in advance...
                      If u can't explain it to a six year old; You don't understand it yourself!!

                      Comment

                      • #12
                        Originally posted by hgaaditya View Post
                        Guys took m bike to another mechanic today,,and he opened up the engine,,,and told that the clutch plates and gear spring had to be replaced,

                        He also told that he has to cut out grooves in the clutch bell in order to allow the oil to flow..He said may be 4-5 grooves needed to be cut...
                        so i am woried that cuting grooves would make the bell weaker,,so i need ur suggestions as soon as possible,,,Pls reply quickly..

                        Any advice is welcome...Thank you in advance...
                        Your new mechanic may be right regarding replacing clutch plates, as bad clutch will lead to increased vibrations and the bike will not accelerate as usual, as the clutch slips...

                        If you are able to get genuine stock clutch plates, I think there's no need to cut grooves and all, the manufacturer would've designed it in a way to allow oil flow.

                        Also, weak compression could be due to improper valve seating, carbon deposits on your valves/head might lead to impoper valve seating.
                        How many kms you've done after the re-bore?

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                        • #13
                          Got my bike back...

                          Actually i am unsure about the exact miles done after the re-bore...
                          But when i rode the bike today....It felt a bit smoother.. vibrations decreased a little.....
                          And the clutch is gr8....Very smooth...
                          He also that the remaining vibrations might be result of Worn out head valves or Cam shaft or the bore itself..he said Just try the bike for a little while like this..and during the next service i will clear it out.....
                          So i cant say Vibrations have disappeared....Pickup hasnt increased by a great extent but noticeable......
                          And it would be helpful if i could know any Pulsar(classic,non-DTSi) specialists in bangalore...
                          Thank u very much....
                          If u can't explain it to a six year old; You don't understand it yourself!!

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                          • #14
                            Originally posted by ARNandal View Post
                            hgaaditya

                            I use motul 5100 ester (15W50) Semi Synthetic, its good.

                            And i suggest you take it to a authorised service centre, there might be a cost difference, but you can always make them do it the perfect way.

                            Kindly ask them to check your bike completely, running on 200ml oil doesnt really sound good.
                            +1 to this.

                            Authorized Svc guys atleast know what they are doing .. Just state them your issue and check what's their take also, regarding compression test it actually saved me big bucks one time, though I did that with Castrol Bike Zone.
                            Safe riding prolongs life (bike & rider & public)

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                            • #15
                              @satsonn Prith.:thank you for advice guys....Now my bike has improved a bit,,.
                              During single riding the pickup is good....but with a pillion it fails to pull....
                              ..What i observed is While the engine is still cold,,vibrations are less..and engine noise is also less.....once it heats up ....the vibrations startup.....
                              And one more obvious thing is loss of compression....The kicker goes down without any effort,,like knife through butter.. and engine braking is very less....Im damn sure thats coz of the loss of compression....
                              my mech says its coz of a bad bore or faulty valves...
                              If u can't explain it to a six year old; You don't understand it yourself!!

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