June 20th, 2015, 05:29 PM | #1 |
ninjette.org newbie
Name: br1ckd
Location: Hawaii
Join Date: May 2015 Motorcycle(s): 07 EX250 Posts: 6
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Installing camshafts and timing chain guides
I tore down the top end of my engine but I can't get the cams back on. Once I set the timing and pull all the slack in the timing chain to the intake side of the engine and I start tightening the brackets that hold the cams down, the chain is pulled off the cam towards the exhaust side of the engine (pic below). I think it might be caused by the front/exhaust cam chain guide being installed incorrectly. I'm using a Haynes service manual and this guide, but they both just say to install it and don't say how, so I just dropped it in the engine in front of the cam chain. I did find a parts diagram, so I know I didn't put it in backwards or upside-down, though.
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June 20th, 2015, 06:52 PM | #2 |
Down Under
Name: Linkin
Location: Sydney, Australia
Join Date: Jun 2014 Motorcycle(s): Kawasaki ZXR250C Ninja Posts: 296
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Step #1: Rotate crank to TDC for cylinder 1.
Step #2: Install cams with the cam chain as tight as possible on the exhaust side (with cam chain tensioner removed). Use cam caps with light torque to hold them in place Step #3: Tighten cam caps to spec & install cam chain tensioner. |
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June 20th, 2015, 06:55 PM | #3 |
ninjette.org guru
Name: scott
Location: australia
Join Date: Jan 2012 Motorcycle(s): 2012 ninja 250r se Posts: 435
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Need to get a timing degree wheel.
If the timing chain is old it looks like the chain is stretched. if you line up off the exh the int will be out and the opposite the other way. this is where adjustable cam timing int and exh will come in handy. If its a new timing chain degree off the int side. Rotate the internals from tdc two or three times from the crankshaft and see what degree timing is out after that. Then adjust the valve clearance after that. |
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June 20th, 2015, 09:48 PM | #4 | |
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Name: Hernan
Location: Florida
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Quote:
You can remove all the tension from the chain by removing the chain tensioner and then installing each camshaft with no care about angular position or synchrony. Align the sprockets by the manual, install the chain guard and then the cam chain tensioner. Please, read these: https://www.ninjette.org/forums/show...01&postcount=4 https://www.ninjette.org/forums/show...2&postcount=18
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June 21st, 2015, 01:32 PM | #5 | |||
ninjette.org newbie
Name: br1ckd
Location: Hawaii
Join Date: May 2015 Motorcycle(s): 07 EX250 Posts: 6
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June 23rd, 2015, 09:44 AM | #6 |
ninjette.org certified postwhore
Name: Spooph
Location: Golden, CO
Join Date: Jul 2010 Motorcycle(s): '08 Ninja 250R Posts: A lot.
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also ready this post: https://www.ninjette.org/forums/showthread.php?t=229378
It is difficult to get the chain to settle while tightening the caps back down.... Tighten a few turns, check the chain on the sprocket, then tighten some more. Sometimes it's not just a drop-in and tighten situation.
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June 23rd, 2015, 07:06 PM | #7 | |
ninjette.org newbie
Name: br1ckd
Location: Hawaii
Join Date: May 2015 Motorcycle(s): 07 EX250 Posts: 6
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June 26th, 2015, 09:02 PM | #8 | |
ninjette.org guru
Name: scott
Location: australia
Join Date: Jan 2012 Motorcycle(s): 2012 ninja 250r se Posts: 435
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