April 2nd, 2013, 11:24 PM | #1 |
ninjette.org member
Name: Kyle
Location: Bay Area
Join Date: Mar 2013 Motorcycle(s): Ninja 250 Posts: 11
|
Valve rocker arm replacement
I was doing a valve adjustment and tightening the locknut on an intake valve rocker arm, and it flew out of its socket and chipped . It is a ball and socket joint and I have a seized ninja 250 engine as well as a older engine I received. I can take the rocker arm from the seized engine, if it is removable.
How would I perform the replacement? What do I need to remove and get to and if there is any know instructionals on this that would be great! |
|
April 3rd, 2013, 05:16 AM | #2 |
ninjette.org certified postwhore
Name: D
Location: Palm Beach, FL
Join Date: Oct 2010 Motorcycle(s): 2006 Ninja 250R, 2007 EFI Ninja 250R Posts: A lot.
Blog Entries: 1
|
Good thing you caught it before you put it back together. Overtorquing the rocker arms during a valve adjustment will destroy the engine if you run it like that. The max torque on the nuts is about 15#.
But to answer the question, you have to remove the cams - actually, just loosen them - to get to the rockers. So basically: 1) removed the cam chain tensioner, 2) remove the cam caps - leaving the sprocket still connected. 3) reach in and remove and replace the rocker. 4) put the cam caps back on. 5) Verify cam timing (it can slip a tooth while you are working on it) and then fix the cam timing according to the manual. 6) Verify the cam chain tensioner lever isn't stuck and work it free. 7) oil and reinstall the cam chain tensioner. That should do it for you.
__________________________________________________
My Ninja Blog Proud member of ABATE.My NYC Road Rage documentary - CENSORED! |
1 out of 1 members found this post helpful. |
April 3rd, 2013, 05:19 AM | #3 |
ninjette.org certified postwhore
Name: D
Location: Palm Beach, FL
Join Date: Oct 2010 Motorcycle(s): 2006 Ninja 250R, 2007 EFI Ninja 250R Posts: A lot.
Blog Entries: 1
|
Oh, and one other thing. You need to inspect ALL of your rockers to make sure they aren't also broken. If any have broken dog ears, then they will work out and destroy the engine.
Doesn't look that threatening, but it is.
__________________________________________________
My Ninja Blog Proud member of ABATE.My NYC Road Rage documentary - CENSORED! |
1 out of 1 members found this post helpful. |
April 3rd, 2013, 05:22 AM | #4 |
ninjette.org certified postwhore
Name: D
Location: Palm Beach, FL
Join Date: Oct 2010 Motorcycle(s): 2006 Ninja 250R, 2007 EFI Ninja 250R Posts: A lot.
Blog Entries: 1
|
Oh, and invest in a $10 torque wrench at harbor freight. Otherwise, you'll be stripping the cam caps as well.
__________________________________________________
My Ninja Blog Proud member of ABATE.My NYC Road Rage documentary - CENSORED! |
1 out of 1 members found this post helpful. |
April 3rd, 2013, 05:58 AM | #5 |
Daily Ninjette rider
Name: Hernan
Location: Florida
Join Date: Mar 2011 Motorcycle(s): 2007 Ninja 250 Posts: A lot.
MOTY - 2016, MOTM - Dec '12, Jan '14, Jan '15, May '16
|
Welcome to the site, Kyle !!!
__________________________________________________
Motofool .................................Never ride faster than your guardian angel can fly "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí |
|
April 3rd, 2013, 07:31 AM | #6 |
ninjette.org member
Name: Kyle
Location: Bay Area
Join Date: Mar 2013 Motorcycle(s): Ninja 250 Posts: 11
|
Yea I need to go an get a torque wrench :/
Whats the trick to removing and reinserting the rocker arms? Do you just pull them off and push them back in? Thanks a lot for the feedback! |
|
April 3rd, 2013, 07:38 AM | #7 |
ninjette.org certified postwhore
Name: D
Location: Palm Beach, FL
Join Date: Oct 2010 Motorcycle(s): 2006 Ninja 250R, 2007 EFI Ninja 250R Posts: A lot.
Blog Entries: 1
|
pretty much. You just have to make sure they're sitting in there socket properly. Other than that it's the cams that actually hold them in.
__________________________________________________
My Ninja Blog Proud member of ABATE.My NYC Road Rage documentary - CENSORED! |
|
April 3rd, 2013, 07:39 PM | #8 |
ninjette.org member
Name: Kyle
Location: Bay Area
Join Date: Mar 2013 Motorcycle(s): Ninja 250 Posts: 11
|
Any idea the torque spec on the cam caps?
Despite all of the headaches i've encounter with this engine swap/rebuild... I'm having fun! I sure wanna hop back on the bike soon though. |
|
April 3rd, 2013, 08:23 PM | #9 |
ninjette.org certified postwhore
Name: D
Location: Palm Beach, FL
Join Date: Oct 2010 Motorcycle(s): 2006 Ninja 250R, 2007 EFI Ninja 250R Posts: A lot.
Blog Entries: 1
|
Rocker arm nuts = 12#
Cam caps = 9# They are very easy to strip.
__________________________________________________
My Ninja Blog Proud member of ABATE.My NYC Road Rage documentary - CENSORED! |
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Rocker arm mod | JAG | 2008 - 2012 Ninja 250R Tech Talk | 4 | August 25th, 2013 08:36 PM |
Broke a damn rocker arm during valve adjustment. | SV_Hadder | 1986 - 2007 Ninja 250R Tech Talk | 7 | April 3rd, 2013 03:00 PM |
Missing Rocker arm and valve adjust screw/nut | Ragnar1x | 1986 - 2007 Ninja 250R Tech Talk | 45 | May 22nd, 2011 09:28 AM |
[roadracingworld.com] - Crutchlow Undergoes Successful Arm Pump Surgery On Right Arm | Ninjette Newsbot | Motorcycling News | 0 | April 8th, 2011 09:30 AM |
WTB-rocker arm | yelve | Items Wanted | 5 | April 6th, 2011 05:26 PM |
|
|