How do you set the timing on 400ex - Honda ATV Forum
Repair & Maintenance Having problems? Doing a rebuild? All Repair/Maintenance Discussions here.

 
LinkBack Thread Tools Display Modes
post #1 of 9 (permalink) Old 07-20-2012, 08:35 PM Thread Starter
Member
 
cpapillion1987's Avatar
 
Join Date: Jul 2012
Location: cape may new jersey
Posts: 71
How do you set the timing on 400ex

I had to replace my piston and rings in my 400ex but i have i manual on it but its a little tricky to time i think i have it on tdc but im not sure cause it has to different marks on the crank shaft........ So can someone please let me know which mark is for tdc so i can ride some time soon
cpapillion1987 is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 07-20-2012, 09:02 PM
Super Moderator
Supporting Member
 
Helmut's Avatar
 
Join Date: Oct 2009
Posts: 23,581
Liked: 23 times
There should be two marks.......a "T" mark and an "F" mark. Use the "T" mark to set the cam timing.

Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
Helmut is offline  
post #3 of 9 (permalink) Old 07-20-2012, 09:13 PM Thread Starter
Member
 
cpapillion1987's Avatar
 
Join Date: Jul 2012
Location: cape may new jersey
Posts: 71
how would i know which one is the t mark cause it doesnt have and letters on the marks
cpapillion1987 is offline  
Sponsored Links
Advertisement
 
post #4 of 9 (permalink) Old 07-20-2012, 09:44 PM
Super Moderator
Supporting Member
 
Helmut's Avatar
 
Join Date: Oct 2009
Posts: 23,581
Liked: 23 times
It should have a "T" and an "F"......they're just hard to see sometimes. If you can't see them, remove the sparkplug and put a drinking straw down into the cylinder and let it sit on top of the piston. Now rotate the crankshaft until the drinking straw comes all the way to the top and stops, before starting to go back down. When the piston is exactly to the top of it's stroke, that is top dead center and it should be aligned with the "T" mark. That's what the "T" stands for.......top dead center. When you're satisfied the piston is all the way to the top of it's stroke, just look at the marks on the flywheel and the mark that's aligned on the flywheel should be the "T" mark.

Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
Helmut is offline  
post #5 of 9 (permalink) Old 07-21-2012, 11:56 AM Thread Starter
Member
 
cpapillion1987's Avatar
 
Join Date: Jul 2012
Location: cape may new jersey
Posts: 71
thanks for all your help....... cause im bout to put it back together and i had to figure this thing out and i didnt want mess nothing up........ i already have the piston out but i think the crankshaft had move a little on me and im not sure if its on tdc or not....... so do you think i can put it back on tdc center after i put it back together and then time it
cpapillion1987 is offline  
post #6 of 9 (permalink) Old 07-21-2012, 08:45 PM
Senior Member
 
slincolnn's Avatar
 
Join Date: Nov 2011
Location: western ky
Posts: 1,986
Liked: 1 times
Make sure you turn it over by hand a couple of times and check your timing before cranking it up.

07 Foreman 500
04 250ex
06 yamaha Wolverine 450
03 recon
slincolnn is offline  
post #7 of 9 (permalink) Old 07-22-2012, 08:09 PM Thread Starter
Member
 
cpapillion1987's Avatar
 
Join Date: Jul 2012
Location: cape may new jersey
Posts: 71
how would i turn it over by hand to check the timing on it
cpapillion1987 is offline  
post #8 of 9 (permalink) Old 07-22-2012, 10:16 PM
Super Moderator
Supporting Member
 
Helmut's Avatar
 
Join Date: Oct 2009
Posts: 23,581
Liked: 23 times
Quote:
Originally Posted by cpapillion1987 View Post
how would i turn it over by hand to check the timing on it
Take the plug out of the crankcase cover and put a socket on the end of the crankshaft and turn it with a breaker bar.

Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
Helmut is offline  
post #9 of 9 (permalink) Old 07-23-2012, 06:14 AM Thread Starter
Member
 
cpapillion1987's Avatar
 
Join Date: Jul 2012
Location: cape may new jersey
Posts: 71
thanks again tonight or tomorrow i will let yall know how did it go.......but hopefully i will get this thang right so i can go riding soon
cpapillion1987 is offline  
Reply

  Lower Navigation
Go Back   Honda ATV Forum > Honda ATV Technical Discussions > Repair & Maintenance

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Honda ATV Forum 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
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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