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August 7th, 2012, 03:19 PM
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ninjette.org member
Name: Fred
Location: Orange County
Join Date: May 2012 Motorcycle(s): Ninja 250r 2012 Posts: 60
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Valve Adjustment
So this is a noob question but why do people get their valves adjusted ?
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Rah |
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August 7th, 2012, 03:28 PM
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ninjette.org certified postwhore
Name: Morgan
Location: A city twinned with Kawasaki
Join Date: Nov 2011 Motorcycle(s): '08 Ninja 250, 2010 STR 675 Posts: A lot.
Blog Entries: 1
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So that they open & close at the right tolerances, too far open & they could get a bang of the piston, destroying them & probably the whole engine. too tight & they don't allow air (or exhaust) to flow properly, suffocating the engine.
Fazer thou intake valves after a bang of the piston... 
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August 7th, 2012, 03:32 PM
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ninjette.org member
Name: Fred
Location: Orange County
Join Date: May 2012 Motorcycle(s): Ninja 250r 2012 Posts: 60
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Quote:
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Rah |
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August 7th, 2012, 03:37 PM
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ninjette.org certified postwhore
Name: Morgan
Location: A city twinned with Kawasaki
Join Date: Nov 2011 Motorcycle(s): '08 Ninja 250, 2010 STR 675 Posts: A lot.
Blog Entries: 1
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Quote:
The valve adjustment is a case of check & if they're out adjust them back into spec. |
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August 7th, 2012, 03:41 PM
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troll bait
Name: Brian
Location: Marina Del Rey, CA
Join Date: Jul 2012 Motorcycle(s): 2006 Ninja 250EF Posts: 72
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Don't worry. Your 2012 ninja won't need an adjustment for a long while...unless you're pushing 8k on the odometer already.
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August 7th, 2012, 03:44 PM
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ninjette.org guru
Name: Chris
Location: Chattanooga
Join Date: May 2012 Motorcycle(s): 09 ninja 15.256 Posts: 263
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Everything does remain stock. The only thing that changes is the shim if the clearance is out of spec.
Over time, as the valve seat wears, the clearance between the valve and the lobe tightens up. If it gets too tight, thermal expansion can cause the valve to remain open slightly and the valve and the seat will be burned. Then it's time for a new head.
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"We're not always doing business, but we're always open." "For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring." Carl Sagan |
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August 7th, 2012, 03:56 PM
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#7 | |
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ninjette.org member
Name: Fred
Location: Orange County
Join Date: May 2012 Motorcycle(s): Ninja 250r 2012 Posts: 60
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Quote:
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Rah |
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August 7th, 2012, 03:57 PM
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ninjette.org member
Name: Fred
Location: Orange County
Join Date: May 2012 Motorcycle(s): Ninja 250r 2012 Posts: 60
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Quote:
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Rah |
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