Screaming clutch - Honda CBR250R Forum : Honda CBR 250 Forums
User Tag List

 
LinkBack Thread Tools
post #1 of 9 Old 12-11-2012, 10:21 AM Thread Starter
Member
 
Join Date: Nov 2012
Location: USA, TN
Posts: 49
Thanks: 36
Thanked 3 Times in 2 Posts
Screaming clutch

So ive noticed when its cold out, say 30 degrees (f) and below, something on the bike squeals durring take off ( 1-2 gear). I am just assuming its the clutch since its only durring take off. Has anyone else had this issue? Im not sure if the clutch is dry and slipping or if the " clutch is just cold" or what. Sounds similar to a dieing electric fan. I know its not the fan, as its only durring the first 15 mins of riding when its cold out. I do let the bike warm up to two or three bars before climbing on to ride.

Any insight?
P.s,
These are not full throttle starts either. Just a normal take off.

Sent from my DROIDX using Motorcycle.com Free App

G└┬H☺

Stock Black Honda Cbr250r
- 100/55 headlight
Glitch is offline  
Sponsored Links
Advertisement
 
post #2 of 9 Old 12-11-2012, 09:26 PM
Senior Member
 
Join Date: Feb 2012
Location: coogee beach australia
Posts: 2,673
Thanks: 965
Thanked 1,242 Times in 753 Posts
clutch is 'wet', ie, bathed in engine oil [thus not "dry"]
thus clutch warmed by warm engine oil..

is this new,, when did it start,, how can you influence it,
ie, by riding, using clutch differently, revs, etc etc..
'squealing' sounds like something to have checked
by someone who understands mechanics etc..

just one thing tho, 'squealing' can come from small foreign
object stuck in between brake pad and disc, in which case
rocking it brakes on and/or riding slowly brakes on
may remove it.. rule that 'screeching' out first..

as an outside chance check around countershaft sprocket
for anything [small bit of stick etc] possibly caught in there..

if you cant find anything obvious best take it to your dealer..
shisoshin is offline  
post #3 of 9 Old 12-11-2012, 09:53 PM
Senior Member
 
Join Date: Jun 2012
Location: Southwest Missouri
Posts: 610
Thanks: 143
Thanked 117 Times in 94 Posts
One cold morning I was hearing a muffled "Grunt" sound when I down shifted. After the engine warmed up the sound stopped, and never happened again. Apparently it was just cold weather related.

2012 CBR250R The little bike that could.
http://www.fuelly.com/driver/steve47/cbr250r
Steve_47 is offline  
post #4 of 9 Old 12-11-2012, 10:38 PM
Senior Member
 
Matao87's Avatar
 
Join Date: Jan 2012
Location: Western Washington
Posts: 518
Thanks: 41
Thanked 94 Times in 70 Posts
Mine has been doing the same "screeching" sound you describe since about 2,000 miles. Almost 9,000 on her now. Definitely related to cold, however mine will do it when it's warmer out when the bike first starts (before the temp gauge is to normal). Even in sub freezing temps it goes away after the bike is warm. I only notice the sound when I'm "feathering" the clutch on initial take off. I also notice I don't get the sound if I accelerate quicker/feather the clutch less. It doesn't feel like it's slipping at all and has made the sound with both conventional GN4 oil and fully synthetic. With the right technique I hardly encounter the noise at all anymore, but if I hover in the friction zone when taking off in 1st it will still make that awful sound.

I don't think it's a big problem, but if you find out more, please let me know.
Matao87 is offline  
The Following User Says Thank You to Matao87 For This Useful Post:
Glitch (12-12-2012)
post #5 of 9 Old 12-12-2012, 09:26 AM
Senior Member
 
Wynne G Oldman's Avatar
 
Join Date: Dec 2011
Location: Bury, Lancashire, Great Britain.
Posts: 3,788
Thanks: 1,111
Thanked 1,535 Times in 788 Posts
Mine does it sometimes, usually when it's cold and I've set of quickly with relatively low revs. If I rev it higher, it doesn't do it. I think it's some sort of harmonic vibration from the clutch. I've had other bikes that have done this, without any long term problems, so I'm not worried about it.

He knows not where he's going, for the road it will decide, it's not the destination, but the glory of the ride.

Click for mpg >>> http://www.spritmonitor.de/en/detail/489745.html
Wynne G Oldman is online now  
The Following User Says Thank You to Wynne G Oldman For This Useful Post:
Glitch (12-12-2012)
post #6 of 9 Old 12-12-2012, 10:22 AM Thread Starter
Member
 
Join Date: Nov 2012
Location: USA, TN
Posts: 49
Thanks: 36
Thanked 3 Times in 2 Posts
Ty for the insight, ive noticed aswell that when the engine has warmed up that it stops... so im not really sure either. But im glad im not the only one thats encountered it

Sent from my DROIDX using Motorcycle.com Free App

G└┬H☺

Stock Black Honda Cbr250r
- 100/55 headlight
Glitch is offline  
post #7 of 9 Old 12-12-2012, 11:58 AM
Super Moderator
 
Join Date: Apr 2012
Location: Calgary, Canada
Posts: 2,026
Thanks: 2,190
Thanked 811 Times in 496 Posts
I'm not sure about this bike but if it was a car I would say it was the throw out bearing in the clutch.

Everyone has the right to be offended but just because you're offended doesn't mean you're right!
Jme250RA is offline  
post #8 of 9 Old 12-12-2012, 07:04 PM
Senior Member
 
Aufitt's Avatar
 
Join Date: Jul 2011
Location: Your Mom.
Posts: 4,965
Thanks: 1,612
Thanked 2,834 Times in 1,308 Posts
Ive googled your problem,
30 fahrenheit = -1.11111 degrees

Thats 'minus'... less than freezing, less than zero, less than the coldest of the cold.
Crikey! I'd be screaming too.

Sent from my mobile phone while driving, waiting for a vigilante Motovlogger to star in his own train wreck.
Aufitt is offline  
The Following User Says Thank You to Aufitt For This Useful Post:
Glitch (12-13-2012)
post #9 of 9 Old 12-13-2012, 01:01 PM Thread Starter
Member
 
Join Date: Nov 2012
Location: USA, TN
Posts: 49
Thanks: 36
Thanked 3 Times in 2 Posts
Lol no bearings going out, it only has 1400 miles on it. And auffit, i rode to work at 22 degrees f today no winter clothes or gloves bc im not rich lol. I just love my bike. Odd thing is, no screaming today. So i have no idea? ??

Sent from my DROIDX using Motorcycle.com Free App

G└┬H☺

Stock Black Honda Cbr250r
- 100/55 headlight
Glitch is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Honda CBR250R Forum : Honda CBR 250 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome