kiran_sanaba

Hi all,

This is my first bike, so I don't no much about bikes, I purchased P150 U.G 4.5 on August 12, I have completed 1700kms upto now. Second service is due on 5000kms.

I have followed the run-in period strictly and never crossed 50 in my first 1000kms. After 1000kms I started crossing 50, and I noticed vibration in engine after 50kphm, this vibration increases and becomes more violent as I reach 60, and I can notice engine being uncomfortable after 55 with some noise.

The bike is smooth through its transition from 1-4th gears but in 5th gear after I cross 50kph, engine starts vibrating. I don't no whether this is a serious problem as I have never owned a bike, but I think a 150cc bike shouldn't vibrate at speeds of 60. Please help me

Regards,
Kiran.S.V

Noor

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abhichotu.abhi

It should'nt happen as you are saying. Which brand\specification engine oil you are using? Check the drive chain play, was the clutch opened? You might also need to do balancer shaft setting.

EDIT: Tighten the engine mounting bolts too.

V!RU$

just to be sure the vibrations are coming from the engine rev. your bike in neutral and simultaneously try revving a different pulsar(i'm sure availability of another pulsar won't be an issue).
if the engine appears to be smooth then i'm pretty sure the problem is with the rim or the tyres.(did u get eurogrip or MRF ??)
coz my friend also had a similar problem and later he noticed the problem was due to the bent rim.
also put your bike in main stand on a level ground and engage gears upto fifth gear and rev about till 6,000RPM then if the bike wobbles and shakes then the real culprit are the tyres or the rim.!!!!

Killer_Rider

Hi All,

I once had a similar problem. I could feel some queer vibrations and there was also some noise emanating from the engine. When I took it to a mechanic suspecting all kinds of problems like low engine oil, etc. all the mechanic had to do was tighten a screw. I know this answer sounds silly but silly is exactly how I felt when the noise stopped as the mechanic tightened the screw!

PS The Screw was somewhere near the engine on the front side. Sorry that I am not technical enough to describe the precise location.

kiran_sanaba

Thanks for the reply guys,

@abhi: The engine oil was changed at first service by service center people, they had charged 500rs for the oil, I don't exactly no what oil they have filled. Sorry abhi I don't no anything about balancer shaft setting, drive chain play, all those points went over my head. And I have never opened clutch.


@V!RU$: Thank you very much for your suggestion, I am going to try it today, mine are eurogrip tyres. The road I travel is filled with potholes, I have over speeded on many of pot holes, so let me check whether the problem is from tyre/rim.


@Killer_Rider: hmmm I might as well take my bike to the service center.

kiran_sanaba

The vibration is coming from the engine and not because of rim or tyre, service center guy told it might be because of some idle gear or something, and would fix it on second service

Meanwhile yesterday my bike was in the rain, and when I opened the fuel cap at petrol bunk there was water on the inside edge of the tank, the guy filling the petrol told that water shouldn't go inside tank. Can this cause any problem.

I have also noticed that the engine is making more noise than before, and the pickup of the bike has also reduced, and I also noticed that the engine gets heated quite quickly even if I drive within 50kph for 15mins, is it normal..

I am thinking to change the engine oil, any suggestions for engine oil pulsar 150 UG4.5