• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

Valve train noise

  • Thread starter Thread starter ToddStyles
  • Start date Start date
T

ToddStyles

Guest
Just how loud are properly adjusted valves?

I'm still working on my freebie '81 GS750E I got from my brother. The bike has been sitting for 4 years.
Ever since I got it running a few weeks ago it has had a rattle in the engine once it got up around 4K. After some research, I figured it was the cam chain since my tensioner was completely froze up. I rebuild the tensioner and pulled the cam cover to check the valve clearances. They were all pretty tight, so I adjusted them on a loose side (.005"). I started the bike up this evening and I didn't notice the rattle anymore, but there is quite a bit of valve train noise. I didn't get out and ride it so it never got properly warmed up either. My brother said not to worry that for someone not used to it they would sound like a pea thrasher... which it does.
Do I have anything to worry about or is the noise normal?
thanks.
 
Most likely normal. Make sure the engine is up to full temperature though before you pass judgement.
 
yep sounding like someone with finger nails going to town on a key board is normal, especialy if you adjust on the loose side.

running with valves on the loose side does cost you some power (less lift and duration!!)

it's when they get nice and quiet that you have a problem.
 
I was always worried my engine sounded so nasty that at any moment it was sure to explode. That was 40k miles ago.

I fixed it with a very technical solution... earplugs.
 
005"......? That's about 0.13mm. The valve gear will definitely be noisy, and you will be down a bit on power. Normal valve clearance for a stone cold motor is 0.03-0.08mm.
 
Always remember that valves wear to tighter tolerances.
Click to expand...
Yep, and that's why I like to always adjust to the widest specified tolerance. Sure it's a bit rattlier, but when you accept that it's a mechanically GOOD sound, it kind of becomes like music to your ears. :)
 
Guy said:
005"......? That's about 0.13mm. The valve gear will definitely be noisy, and you will be down a bit on power. Normal valve clearance for a stone cold motor is 0.03-0.08mm.
Click to expand...

It was my understanding that the specs for my 16v engine was .09-.13mm.

Did I get get the wrong clearance specs? It's an '81 GS750E w/ 16v engine.
Todd.
 
Guy said:
005"......? That's about 0.13mm. The valve gear will definitely be noisy, and you will be down a bit on power. Normal valve clearance for a stone cold motor is 0.03-0.08mm.
Click to expand...

ToddStyles said:
It was my understanding that the specs for my 16v engine was .09-.13mm.

Did I get get the wrong clearance specs? It's an '81 GS750E w/ 16v engine.
Todd.
Click to expand...

I should be okay. I did some more research and the .03-.08mm clearance specs are for the 8v engine, not my 16v engine.
thanks,
Todd.
 
You must log in or register to reply here.
Back
Top