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Old 03-13-2008, 12:48 AM   #1
beechum1 OP
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XR650L Timing chain diagram

i need the section on the timing chain from a service manual....

and recomendations on what to use to keep the tensioner out of the way to get the cam back in the journals.
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Old 03-13-2008, 01:25 AM   #2
bellmnbell
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Old 03-13-2008, 02:48 AM   #3
Seikkailu_R
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- Piston to top dead center. |T mark on flywheel.
- Cam lobes downward.
- Two aligment marks on cam sprocket paraller to sealing surface when non tensioner side of chain is held tight.
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Old 03-13-2008, 12:06 PM   #4
beechum1 OP
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thanks, that's perfect Seikkailu_R...

now... about getting the tensioner out of the way to get the cam in the journals.... the sprocket touches the tensioner before it can seat, and obviouly, i can't put the cam in first then the tensioner, so what's the garage tool of choice to keep the tensioner out of my way? screwdriver would be perfect if not for it being made of metal and damaging the chain etc.
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Old 03-13-2008, 12:10 PM   #5
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Quote:
Originally Posted by Seikkailu_R
- Piston to top dead center. |T mark on flywheel.
- Cam lobes downward.
- Two aligment marks on cam sprocket paraller to sealing surface when non tensioner side of chain is held tight.
in other words, to be clear.

l mark on the flywheel vertical
-- mark on the cam sprocket horizontal
cam lobes downward obviously, all valves closed.
non tensioner side of chain tight cam to crank.

it seems to me that it would be difficult, following these instructions, to get the timing off.... because any wrong angle of the marks (misalignment) would be VERY obvious.

so now, all that said, brings me back to doe.

how do i get the tensioner to stay out of my way.....
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Old 03-13-2008, 01:25 PM   #6
Seikkailu_R
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I allways install tensioner last.

Release end of spring (one with 90deg bend) from hole.
Check timing.
Put tensioner to its place.
Check that chain guide is between chain and tensioner.
Install axle.
Check timing.
Check that chain guide is between chain and tensioner.
Use strong wire and screwriver to stretch bend end back to its hole.
Remove wire.
Rotate axle to aling locking pin hole and install pin.
Check timing.
Check that chain guide is between chain and tensioner.
Done.

There may be more than one | mark on fly wheel.
One with | and T is correct (Piston on top dead center)
On XL600r there was small notch on timing hole to aling with marks.
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Old 03-13-2008, 01:51 PM   #7
Mercury264
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Quote:
Originally Posted by Seikkailu_R
I allways install tensioner last.

Release end of spring (one with 90deg bend) from hole.
Check timing.
Put tensioner to its place.
Check that chain guide is between chain and tensioner.
Install axle.
Check timing.
Check that chain guide is between chain and tensioner.
Use strong wire and screwriver to stretch bend end back to its hole.
Remove wire.
Rotate axle to aling locking pin hole and install pin.
Check timing.
Check that chain guide is between chain and tensioner.
Done.

There may be more than one | mark on fly wheel.
One with | and T is correct (Piston on top dead center)
On XL600r there was small notch on timing hole to aling with marks.
+1

Its a bitch though.
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Old 03-13-2008, 02:40 PM   #8
beechum1 OP
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ok, that makes sense... i'll see if i can pull this off tonight... i hope so man. this "driving" across the border every day is BS.
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Old 03-13-2008, 04:48 PM   #9
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Good Luck, I usually use a 7d nail bent to wedge between the hole in the tensioner and the inside of the head to hold the tensioner back. Wrap some safety wire around it and tie it off so you don't lose it in the engine.
The tensioner shaft has a device where as the chain stretches and the spring advances it prevents it from backing off and doesn't rely on spring tension alone to hold the chain adjusted.
You can pull the tensioner and shaft out if you take out the 6mm socket head that's holding it, there's an oring you may damage though. Take your time, it just takes some fiddling. I use red loctite on the cam sprocket bolts.
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Old 03-14-2008, 11:02 AM   #10
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if anyone has the tech capabilities to take a video, i'd appreciate it. i couldn't figure out the right sequence to get all the parts to line up correctlylast night, i gave up before i through stuff around the garage.

if not, ty anyway for your help, i'll ttry again later tonight or this weekend.
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Old 03-14-2008, 02:16 PM   #11
Seikkailu_R
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Timing, cam lobes down, non tensioner side of chain kept tight.
100% alingment is probably impossible, but +/- one teeth is clearly off.
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Old 03-14-2008, 02:24 PM   #12
Seikkailu_R
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Tensioners spring
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Old 03-14-2008, 06:25 PM   #13
beechum1 OP
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i see.... the green is a wire loop strong enough to have the screwdriver pull it to get the spring back in place..... i dig.

how where would i find a piece of wire... in space... at this time of night.
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Old 03-14-2008, 10:56 PM   #14
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bit different approach. i put a small allen key in the small hole at the top of the tensioner, and used a tool to move and wiggle the spring back into place.

got it running though, gotta put the oil back in, motor mounts, and all the rest of the usuals....

Thanks to all for the help.
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Old 03-15-2008, 02:36 AM   #15
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Cool, whatever works!
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