HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
DPavitt

Noisy Clutch

17 posts in this topic

I've just started noticing a funny noise on my 2004 WR450F, when idling there is a "whirring" sound by the clutch cover, this dissapears when I pull the clutch in. I also get the noise when moving along. The clutch is working fine and does not slip even under heavy load. Everything else seems fine on the bike. Any ideas.... Thanks Darren

Share this post


Link to post
Share on other sites

I would not worry about it if you just got the bike. Yamaha engines make some god awful sounds. If it is working properly dont worry about it. Just ride the beast they come with heavy duty clutches so I doubt yours is worn out yet. If this is a new sound that was not there before then it may be worth tearing into and inspecting the main gear slop on the basket and the main bearing on the inner clutch basket. :thumbsup:

Share this post


Link to post
Share on other sites

Thanks for the info., I've just changed the oil and the noise has reduced but its still there. Does the fact that it disappears when I pull the clutch in indicate its some kind of thrust bearing noise?

Share this post


Link to post
Share on other sites

Boer, the noise is very slightly noisier when the engine has warmed up but its their straight from start up.

Share this post


Link to post
Share on other sites
My 03 wr450 makes the same noise and I have had no problems yet but I have only owned it for 6 mos.

I was going to say I'm glad someone else has the same noise, but I'll wait to see if it is a real problem!! Lets both hope not.

Share this post


Link to post
Share on other sites

My bike is brand new and it makes the same sound. I think its normal!?!?! :thumbsup:

Share this post


Link to post
Share on other sites

Clutch noise was popular with 03 and 04 models, there have been a couple of mods posted here somewhere to address the issue. On my 03 I had the clutch boss modified with holes drilled so that oil could reach the clutch more effectively, it worked, and the chatter was gone. The other mod was done with exchanging YZ clutch parts. Sorry I don't have more detailed info but it's been a while, do a search on the mod.... Yamaha engines are not "noisy" by late model four stroke standards, they had some chatter coming from the clutch but otherwise they are known as solid, vibration free engines (from everything I've experienced).

Share this post


Link to post
Share on other sites

Also try Delo 400 or Rotella - T which provides better lubrications for our clutches. The mod Dan Lorenze talks about is increasing oil hole flow in the inner clutch basket. Stock 3mm diameter holes need to be increased to 4 mm diameter on the inner hub.

The guys with 03/04 on the YZ450 forum drilled out all the small 3mm holes oversized to 4mm holes in the inner clutch hub to allow more oil to get between the clutch plates. Ty Davis also does this. Apparently it helps with clutches that are grabby in new condtion.

Share this post


Link to post
Share on other sites

My 05 fz6 street bike makes this noise also,doesnt seem to cause any problems,have had it up to 12k rpm. noticeable only @ idle. Yamaha makes noisy engines that's all there is to it.

Share this post


Link to post
Share on other sites

Thanks for all the advice, assuming the noise doesnt affect the performance of the clutch do you think its still worthwhile leaving it alone or will the mod. improve performance as well as noise levels?

Share this post


Link to post
Share on other sites

I have an 03 and an 06, they both have what I thought was a noisey clutch... Until I worked on a friends KTM. I have a lot of hard miles on my 03. I just recently replaced my clutch with a slipper and a hinson basket and the noise went away. The stck parts look fine. Must just be the nature of the beast..

Share this post


Link to post
Share on other sites

my 400ex clutch was making a ticking noise when i would pull in and out the clutch lever. the noise came from the motor running or not. the quad would jerk hard 3 times when i would let the clutch lever out. no more than a month after that i needed new clutch plates

Share this post


Link to post
Share on other sites

I bought a 2005 with 100 or so miles on it. The clutch makes the same noise. With clutch in, no noise, out, noise, and when I rev the engine in neutral I get a vibration. Do you get a vibration when doing the same? My partners 03 makes noise but no where near the noise I get. He gets no vibration when revining his engine. I have about 600 miles on it so far, it is the same. I do not like the noise and vibration, however this problem is my only complaint about this bike. Let me know if you get a vibration of sorts when you rev. the engine in neutral. If you do I will feel much better about things. I really feel that I just got one out of thousands made that the tolerences are not as close as they should be on the clutch, as may be your case also. Thanks

Share this post


Link to post
Share on other sites

I have the same problem with my 05 mine has a whining when I engage the clutch. When I disengage then it is quiet again.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0