Problem with my Unicorn - Page 4 - xBhp.com : The Global Indian Biking Community

ShahriarXtreme · 08-21-2011, 06:20 PM

Quote:

Originally Posted by Honda_CBF

i think that sound is always present it is just more audible while engine braking.. (correct me if wrong)
I'm assuming this because few week ago i got my scoot re-bored it used to sound same as yours, while engine braking it was audible to all road users but while riding normally only i use to hear it

when riding normally i cant hear it, only during engine breaking that too at lower speed when the engine sound reduces....but it was not there before.only after changing ring piston it has started & bike also feels too unrefined

Honda_CBF · 08-21-2011, 09:54 PM

^^I think "unicornrider" suggested a good thing.. First get the tappets & timing chain adjusted (just to be sure) & if the problem persist then its surely the rings..

ShahriarXtreme · 08-22-2011, 10:32 PM

adjusted my timing chain & tappets. still the problem persists. i can still hear the unusual sound at low speed when the engine sound reduces.....now its time to check the internals

Aneesh@4GHz · 08-23-2011, 06:48 AM

Quote:

Originally Posted by ShahriarXtreme

adjusted my timing chain & tappets. still the problem persists. i can still hear the unusual sound at low speed when the engine sound reduces.....now its time to check the internals

Did you checked the timing chain tensioner?

Is the sound heard during idling?

ShahriarXtreme · 08-23-2011, 03:51 PM

Quote:

Originally Posted by Aneesh@4GHz

Did you checked the timing chain tensioner?

Is the sound heard during idling?

i think the mechanic checked everything by opening the head. i can not heard the sound when its in idle.
i can only heard it only when i'm doing engine breaking that too at low speed (less than 30km/h)when the engine sound reduces....sounds like something is getting stuck & moving on

Honda_CBF · 08-23-2011, 04:25 PM

Quote:

Originally Posted by ShahriarXtreme

i think the mechanic checked everything by opening the head. i can not heard the sound when its in idle.
i can only heard it only when i'm doing engine breaking that too at low speed (less than 30km/h)when the engine sound reduces....sounds like something is getting stuck & moving on

I'm not very sure, but to me it seems to do with the rings.

Aneesh@4GHz · 08-23-2011, 05:36 PM

Quote:

Originally Posted by ShahriarXtreme

sounds like something is getting stuck & moving on

If rubbing,then it can be seen on the cylinder walls,open and inspect cylinder walls for damages.

ShahriarXtreme · 08-23-2011, 11:20 PM

ok i'll have to go for overhauling...to find out whats the cause. they said there's something called balancer beside the clutch part which is the main reason for vibration if not adjusted properly.they said this because i'm experiencing heavy vibration after ring piston change which starts right from 4k rpm & after changing ring piston. is it true?

again during overhauling every issues can be found i guess such as loose rings(labor charge+engine oil+gasket)

. by the way this job will make a hole in my pocket but i have to do this anyway

08-23-2011, 11:20 PM	#38 (permalink)
ShahriarXtreme Senior Member Join Date: Jul 2010 Posts: 146	ok i'll have to go for overhauling...to find out whats the cause. they said there's something called balancer beside the clutch part which is the main reason for vibration if not adjusted properly.they said this because i'm experiencing heavy vibration after ring piston change which starts right from 4k rpm & after changing ring piston. is it true? again during overhauling every issues can be found i guess such as loose rings(labor charge+engine oil+gasket). by the way this job will make a hole in my pocket but i have to do this anyway Last edited by ShahriarXtreme; 08-23-2011 at 11:22 PM.

Thread Tools
Show Printable Version Email this Page
Rate This Thread
Rate This Thread:

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Acceleration problem with my unicorn	psycophobic	Help Me!	10	01-02-2011 09:22 PM
mileage problem with UNICORN	majesticdipesh	Help Me!	9	12-15-2010 09:55 AM
problem with my unicorn	vnnavin	Help Me!	2	12-12-2009 05:37 PM
unicorn suspension problem	srpsinu	Help Me!	10	12-09-2009 09:47 PM
New gen unicorn missing problem	becool	Help Me!	1	08-11-2009 08:42 AM

08-21-2011, 09:54 PM	#32 (permalink)
Honda_CBF Still learning the art of bike'in.. Join Date: Jan 2011 Location: Jamshedpur, Jharkhand Posts: 692	^^I think "unicornrider" suggested a good thing.. First get the tappets & timing chain adjusted (just to be sure) & if the problem persist then its surely the rings..

08-22-2011, 10:32 PM	#33 (permalink)
ShahriarXtreme Senior Member Join Date: Jul 2010 Posts: 146	adjusted my timing chain & tappets. still the problem persists. i can still hear the unusual sound at low speed when the engine sound reduces.....now its time to check the internals

Register Now for FREE!
Are you registered on xBhp yet? If not, do so now and start participating to be able to share photos and experiences with other members. It will also enable to you have a chance to be a part of xBhp contests and roadtrips in the future! Username: Password: Confirm Password: E-Mail: Confirm E-Mail: Birthday: Image Verification I agree to forum rules