ADVrider

Go Back   ADVrider > Bikes > Trials
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 11-19-2013, 01:29 PM   #1
BigBird- OP
Adventurer
 
Joined: Jul 2009
Oddometer: 32
Beta 4t Valve Adjustment Help?

I'm preparing to reinstall the head, etc. on my 09 EVO 4t and have a question.

I've had the head and the top part of the head that clamps the cam off to replace cam chain tensioners, etc.
Although, I haven't messed with the valves or valve gear, etc., it would seem prudent to check/adjust the valves.

The engine is still in the frame (sort of barely) so it is not easy to get good access to/through the covers that one adjusts the valves through with the head installed.

SO - My question is: Wouldn't it make sense to temporarily bolt the 2 parts of the head together with the cam in place BEFORE installing the head and cam chain, etc. and do the adjustment with the head OFF of the motor?

It seems this would allow easy access and should give the same results (maybe with less error) than trying to do the adjustment after fully installing the head?

Comments Appreciated!

BigBird- screwed with this post 11-19-2013 at 01:39 PM
BigBird- is offline   Reply With Quote
Old 11-19-2013, 02:51 PM   #2
jonnyc21
n00b sums it up.
 
jonnyc21's Avatar
 
Joined: Feb 2011
Location: Boise aria
Oddometer: 850
I have done just this on one of my old street bikes and it worked great for me. Just my 2 cents.
jonnyc21 is offline   Reply With Quote
Old 11-20-2013, 06:59 AM   #3
motobene
Motoing for 43 years
 
Joined: Mar 2013
Location: Wichita Mountains SW Oklahoma
Oddometer: 1,019
+1

Valve lash is typically set cold, so yes, you could do that because what matters is what's between the valve stem and tappet in the head subassembly. That won't work for under-head cams on pushrod motors, but with overhead valves it should. All that business about getting the crank to line up right to take pressure off the followers is essentially to make crank position a non influencer of valve lash, same as having the head off and in your lap.

I'm wondering if subassembly valve adjustment is how it is initially done at the factory?
motobene is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

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 On

Forum Jump


Times are GMT -7.   It's 08:38 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014