August 30th, 2016, 03:08 PM | #1 |
ninjette.org member
Name: Craig
Location: San Luis Obispo, CA
Join Date: Jul 2016 Motorcycle(s): 2014 Ninja 300 ABS, 2007 Yamaha FZ6 Posts: 210
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Is this a loose cam chain?
So my Ninja 250 was making a ticking noise so I'm doing a valve adjustment now (I discovered that they're REALLY tight), but someone also suggested looking at the cam chain to see if it's loose. Video below:
https://youtu.be/Wj-3draEkhI I recently cleaned and reseated the CCT and that seemed to help a little, but the ticking remained slightly. If the chain is loose, how can I fix it? |
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August 30th, 2016, 03:43 PM | #2 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
MOTM - Oct '18, Aug '17, Aug '16
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Normally you have to turn an engine in its normal direction of rotation to give a tensioner a chance to do its job. I assume that's the case with the Ninja 250 engine, but I'll defer to someone with better advice if I'm wrong.
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August 30th, 2016, 03:46 PM | #3 |
The Corner Whisperer
Name: Chris (aka Reactor)
Location: Northern KY
Join Date: May 2011 Motorcycle(s): 2010 250 (track), 1992 250, 2006 R6 (street/track), 2008 R6 (track) Posts: Too much.
MOTY 2015, MOTM - Nov '12, Nov '13
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Jim & Craig, just like the final drive chain can be measured for slack, the cam chain can be measured as well since he has it appart. I have posted the measure before, I will see if I can find it.
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August 30th, 2016, 03:50 PM | #4 |
The Corner Whisperer
Name: Chris (aka Reactor)
Location: Northern KY
Join Date: May 2011 Motorcycle(s): 2010 250 (track), 1992 250, 2006 R6 (street/track), 2008 R6 (track) Posts: Too much.
MOTY 2015, MOTM - Nov '12, Nov '13
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Get out the ruler!
20 Link length Standard: 127-127.4mm Service Limit: 128.9mm
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Goal: Shake A Million Hands | Look through the corners | Track Day Prep | Closest track? | The Mid-Ohio School |
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August 30th, 2016, 03:54 PM | #5 |
ninjette.org member
Name: Craig
Location: San Luis Obispo, CA
Join Date: Jul 2016 Motorcycle(s): 2014 Ninja 300 ABS, 2007 Yamaha FZ6 Posts: 210
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Ok, so I slowly cranked the motor and noticed that the slack went away, but then would come back after a half rotation or so, then would get tight again, and then loose again. Is this normal?
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August 30th, 2016, 03:56 PM | #6 |
The Corner Whisperer
Name: Chris (aka Reactor)
Location: Northern KY
Join Date: May 2011 Motorcycle(s): 2010 250 (track), 1992 250, 2006 R6 (street/track), 2008 R6 (track) Posts: Too much.
MOTY 2015, MOTM - Nov '12, Nov '13
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Yes, just like your final drive chain (to the rear wheel), the chain stretches in different places/links. Which is why you take the measure in multiple places to get a feel for the entire chain but always base your final decision from the tightest part.
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Goal: Shake A Million Hands | Look through the corners | Track Day Prep | Closest track? | The Mid-Ohio School |
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August 30th, 2016, 04:11 PM | #7 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
MOTM - Oct '18, Aug '17, Aug '16
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Also the cams are easy to turn in some spots and hard to turn in others (notchy) because of the valves and springs.
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1 out of 1 members found this post helpful. |
August 30th, 2016, 06:53 PM | #8 | |
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
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Quote:
https://www.ninjette.org/forums/show...&postcount=733 https://www.ninjette.org/forums/showthread.php?t=149329
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