Vibrations,reasons and remedy? - xBhp.com : The Global Indian Biking Community

RanjithMN · 03-11-2010, 09:50 PM

What exactly is the reason for our motorcycles to start vibrating?esp, foot-pegs and handle bars?
im not referring to bikes that have vibrations from the showroom itself but bikes that start vibrating later on!
is it due to some loose nuts and bolts?any specific ones?

thank you

Aryan · 03-11-2010, 09:55 PM

Query Approved.

SunnyBoi · 03-11-2010, 10:46 PM

Mounting rubbers go hard. Time to change them.

jd666 · 03-12-2010, 03:04 AM

^ not just that a number of factors come into play..

- the mounting nuts/bolts etc do loosen up slightly and need to be re-tightened from time to time.

- Chain and sprockets start cutting and bedding in.. that eventually also adds to a lot of footrest vibration

- Seals, bearings etc start wearing out.. You need to remember that in your single cylinder engine, its reciprocatory motion that gets converted to rotational.. so when the bearings and everything starts wearing out.. the vibes go up.

- Eventually the rings also wear out beyond a certain limit and that adds to the vibrations ( the piston is free to move laterally )...

aargee · 03-12-2010, 04:17 PM

Adding my 2 paise - cracked metals (experience from my rear bracket) & plastics, cotter pins

Coplay@180 · 03-12-2010, 05:10 PM

+1 to JD666 and here's my 2 cents
1. Broken fairings
2. Loose fairings, gaps, no packing
3. Broken plastic parts ( esp, under the seat and towards the tail)
4. Mounting bolts loose. Etc.

RanjithMN · 03-12-2010, 07:21 PM

tnx guys.
Where is this "foundation bolt" and "center bolt" located?

SunnyBoi · 03-12-2010, 07:53 PM

Engine plays a major factor. On my first RX rebuild I saw the left web of the crank was from a RX135 and the right web was from a RX100. Junked it and bought a brand new crank. Vibes went down a lot, so did the weird wear pattern on the cylinder

aargee · 03-12-2010, 09:18 PM

Quote:

Originally Posted by SunnyBoi

Engine plays a major factor. On my first RX rebuild I saw the left web of the crank was from a RX135 and the right web was from a RX100. Junked it and bought a brand new crank. Vibes went down a lot, so did the weird wear pattern on the cylinder

WHOA!!! How could this Rx135 & Rx100 happen on a crankshaft?

SunnyBoi · 03-12-2010, 09:22 PM

Well it happened and it ruined 2 oversizes on my cylinder. Opened the engine anyways since i felt the con rod play was a bit too much. Later realised this and went for a new crank.

03-11-2010, 09:50 PM	#1 (permalink)
RanjithMN tuned Join Date: Aug 2009 Location: Cochin/Riyadh,KSA Posts: 2,844	Vibrations,reasons and remedy? What exactly is the reason for our motorcycles to start vibrating?esp, foot-pegs and handle bars? im not referring to bikes that have vibrations from the showroom itself but bikes that start vibrating later on! is it due to some loose nuts and bolts?any specific ones? thank you __________________ Smoke rubber,not tobacco. -Life Through-the-Lens -For HELLA/VALEO [BMW/AUDI/FORD/LINCOLN/SKODA],P220,Aftermarket Projectors,pls contact me!

03-11-2010, 09:55 PM	#2 (permalink)
Aryan Senior Member Join Date: Jan 2006 Location: New Delhi/ Shillong Posts: 18,275	Query Approved. __________________ ...in search of that perfect world - My Travel Blog :)

03-12-2010, 03:04 AM	#4 (permalink)
jd666 Senior Member Join Date: Sep 2009 Location: Gurgaon/Faridabad Posts: 3,320	^ not just that a number of factors come into play.. - the mounting nuts/bolts etc do loosen up slightly and need to be re-tightened from time to time. - Chain and sprockets start cutting and bedding in.. that eventually also adds to a lot of footrest vibration - Seals, bearings etc start wearing out.. You need to remember that in your single cylinder engine, its reciprocatory motion that gets converted to rotational.. so when the bearings and everything starts wearing out.. the vibes go up. - Eventually the rings also wear out beyond a certain limit and that adds to the vibrations ( the piston is free to move laterally )... __________________ The latest RXZ rebuild pics, updated July 2011 - http://www.xbhp.com/talkies/thumpers...tml#post669927 My offerings to the gods of speed - - Yamaha R15 - Yamaha RXZ 5 speed

03-12-2010, 04:17 PM	#5 (permalink)
aargee My world changed from smoke & 2T to ECM & 4 joke!! Join Date: Jan 2010 Location: Chennai Posts: 6,592	Adding my 2 paise - cracked metals (experience from my rear bracket) & plastics, cotter pins __________________ Be who you are and say what you feel, because those who mind don't matter, and those who matter don't mind - Dr Seuss

03-12-2010, 05:10 PM	#6 (permalink)
Coplay@180 Senior Member Join Date: Dec 2008 Location: B'lore-Chennai-Coimbatore Posts: 728	+1 to JD666 and here's my 2 cents 1. Broken fairings 2. Loose fairings, gaps, no packing 3. Broken plastic parts ( esp, under the seat and towards the tail) 4. Mounting bolts loose. Etc. __________________ Being a Speed Demon aint worth it anymore..!!

03-11-2010, 10:46 PM	#3 (permalink)
SunnyBoi Senior Member Join Date: Sep 2008 Location: Bangalore/Mysore Posts: 154	Mounting rubbers go hard. Time to change them.

03-12-2010, 07:21 PM	#7 (permalink)
RanjithMN tuned Join Date: Aug 2009 Location: Cochin/Riyadh,KSA Posts: 2,844	tnx guys. Where is this "foundation bolt" and "center bolt" located? __________________ Smoke rubber,not tobacco. -Life Through-the-Lens -For HELLA/VALEO [BMW/AUDI/FORD/LINCOLN/SKODA],P220,Aftermarket Projectors,pls contact me!

03-12-2010, 07:53 PM	#8 (permalink)
SunnyBoi Senior Member Join Date: Sep 2008 Location: Bangalore/Mysore Posts: 154	Engine plays a major factor. On my first RX rebuild I saw the left web of the crank was from a RX135 and the right web was from a RX100. Junked it and bought a brand new crank. Vibes went down a lot, so did the weird wear pattern on the cylinder

03-12-2010, 09:22 PM	#10 (permalink)
SunnyBoi Senior Member Join Date: Sep 2008 Location: Bangalore/Mysore Posts: 154	Well it happened and it ruined 2 oversizes on my cylinder. Opened the engine anyways since i felt the con rod play was a bit too much. Later realised this and went for a new crank.

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