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Mechanical and Technical Mechanical and technical topics, help, and discussions

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  • 1 Post By SilvieFox
  • 3 Post By MarvTravis
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Jun 27th 2016, 06:25 PM   #1
 Greg's Avatar
 
  Apr 2016
  PDX

  2014 Triumph Daytona 675R
Question Lower Timing Chain Sprocket won't turn

Something about best laid plans?

Was doing some preventative maintenance on my 08 Yamaha FZ6 (similar motor to R6S if it helps). I was hearing, albeit intermittent, extra curricular noises that lines up with premature cam chain tensioner failure (probably the only common engine issue with these bikes) and figured I would move forward with putting in a manual cam chain tensioner (APE brand).

Pull out the factory unit, install the new unit, and it seemed real fuzzy trying to figure out proper tension. I had seen mention about turning the crank for adjusting, so move forward with that. I put a ratchet on the crank and start turning, and get about 1/3 rotation and it's like hitting a wall. Rotate the other way (mistake) and same thing, like hitting a wall. Do this a few more times with more torque. More research, realize without sparkplugs removed the compression could be the cause (although all mention it would be difficult with sparkplugs installed, was not described as I was experiencing).

Time lapse to growing fear about firing up the engine when I can't get it to turn by hand and with the timing maybe misaligned or chain not meshed properly, proceed with full strip down to remove sparkplugs, valve cover, etc.

Still will only turn so far. Afraid to add more torque. I'm working with a smallish ratchet (I have a tube I used for additional leverage). Should I up size my ratchet and give it a go? Should I put in gear and try to rotate the tire?

I feel like a stupid caveman which is frustrating because I try to take care of everything I own
Attached Thumbnails
Lower Timing Chain Sprocket won't turn-20160627_183108.jpg   Lower Timing Chain Sprocket won't turn-20160627_183121.jpg  
Jun 27th 2016, 07:03 PM   #2
 
  Jan 2016
  Spokane, WA

  1299 Panigale Anniversario #81/500, 2006 GSX-R 1000
It's possible that the chain skipped a couple teeth while you had the tensioner removed. You need a factory service manual and check the timing marks on the cams and crank. If it feels like it's hitting a wall, I wouldn't put more pressure on it. Definitely don't try to start it!
Jun 27th 2016, 07:29 PM   #3
 SilvieFox's Avatar
 
  Jan 2016
  welches, Oregon

  08Kawasaki Versys(Sylvester),72Suzuki RV90(vanvan),81Honda TwinStar(Bobber),Yamaha225,Honda Shadow
sounds like timing is off and your smacking a valve
dragracer1951 likes this.
Jun 27th 2016, 10:15 PM   #4
 Greg's Avatar
 
  Apr 2016
  PDX

  2014 Triumph Daytona 675R
Well, after extending googling, sounded like a kink in the timing chain. Appeared the only way to get rid of that was to further disassembly, and I'm starting with a clean upper timing slate by taking out the camshafts. Crankshaft now spins freely, and I'm reviewing through all the timing info, including a pretty helpful youtube video.

Lucky for me everything looks pretty well indicated, bottom sprocket is keyed so I know that has not been altered, will probably take a few attempts to get it perfectly in sync. Full day ahead for this guy
Jun 27th 2016, 10:30 PM   #5
 MarvTravis's Avatar
 
  Jan 2016
  Kirkland, WA

  Kawasaki ZX-14
The whole problem could have been avoided by setting the crank position BEFORE removing the old CCT, and then installing and adjusting the manual CCT. Yeah, I understand it's too late now but, hopefully, it may save others from making the same mistake.
Jun 28th 2016, 08:20 AM   #6
 Greg's Avatar
 
  Apr 2016
  PDX

  2014 Triumph Daytona 675R
Quote:
Originally Posted by MarvTravis
The whole problem could have been avoided by setting the crank position BEFORE removing the old CCT, and then installing and adjusting the manual CCT. Yeah, I understand it's too late now but, hopefully, it may save others from making the same mistake.
Definitely an order of operations thing. The chain has a lot more slack than I realized.

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chain, lower, sprocket, timing, turn



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