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Old 04-18-2013, 02:19 PM   #76
brittrunyon OP
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That's "Mr Goober" if you please..........

How's this ?
...........stamp dot straight up.
...........yellow on crank sprocket a bit left (I just don't see a more definite mark)
..........tension on the chain made no difference
..........at the moment there's nothing in the timing window






I guess you'll have to see Goober for your prize.
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Old 04-18-2013, 02:25 PM   #77
Airhead Wrangler
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Quote:
Originally Posted by brittrunyon View Post
...........yellow on crank sprocket a bit left (I just don't see a more definite mark)
The mark you're looking for is that dark line that looks like a burn mark on the tooth 1 to the left from the one pointing at the stamped dot. Yours isn't too bad, but these can be much more faint and hard to see. It looks like you are indeed 1 tooth out.
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R80ST Gets The HPN Treatment
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Old 04-18-2013, 02:27 PM   #78
Plaka
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Quote:
Originally Posted by brittrunyon View Post
Sometimes I feel like "Mr. Goober" when it comes to getting this far into engine repair.

Your absolutely right!
I will put the chain back on now, no big deal & take a look. Now I'm curious.
I " jumped the gun".

Here's what I found:
..........there's what appears to be yellow paint marks on both sprockets
..........looks like it's one tooth off
..........TDC (S mark) is in the timing window on crankcase
That don't look good. Put the engine on TDC, like with a soda straw down the spark plug hole. When the straw stops moving outward, that's TDC. A dial indicator is even better. Never let anything you put down the spark plug hole get near the edge of the piston, it can get pinched which is a hassle.

Also with the chain on, hold one sprocket and see how much you can turn the other, both ways.

Plaka screwed with this post 04-18-2013 at 03:09 PM
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Old 04-18-2013, 03:09 PM   #79
brittrunyon OP
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Found TDC with the ole straw in the cylinder trick
..........OT shows in the timing window

Here's how the sprockets line up.

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Old 04-18-2013, 03:11 PM   #80
Airhead Wrangler
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still off a tooth. You see your mark now, right?
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R80ST Gets The HPN Treatment
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Current rides: HPN #834, '93 R100GSPD "red rocket", '73 R75/5 Toaster mongrel, '80 Ducati Pantah 500SL, '92 DR350, '67 Honda SS50, '80 Honda Chaly.
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Old 04-18-2013, 03:13 PM   #81
Plaka
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Quote:
Originally Posted by brittrunyon View Post
Found TDC with the ole straw in the cylinder trick
..........OT shows in the timing window

Here's how the sprockets line up.
Turn it 180 degrees to the other TDC and look.

Check radial slop in the sprockets.

Did you already buy a chain and stuff?
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Old 04-18-2013, 03:33 PM   #82
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Rotated 180
........OT mark back in window
.......crank mark centered & pointing down
.......cam dimple down but not centered

& yes I have the parts but got the wrong sprocket.

 photo _DSC8985_zpsc2c4ec91.jpg
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Old 04-18-2013, 03:41 PM   #83
Airhead Wrangler
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Quote:
Originally Posted by Plaka View Post
Turn it 180 degrees to the other TDC and look.
What's that going to tell us?
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R80ST Gets The HPN Treatment
Seattle to TDF on an airhead

Current rides: HPN #834, '93 R100GSPD "red rocket", '73 R75/5 Toaster mongrel, '80 Ducati Pantah 500SL, '92 DR350, '67 Honda SS50, '80 Honda Chaly.
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Old 04-18-2013, 03:44 PM   #84
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Quote:
Originally Posted by Airhead Wrangler View Post
What's that going to tell us?
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Old 04-18-2013, 03:47 PM   #85
Plaka
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Originally Posted by Airhead Wrangler View Post
What's that going to tell us?
markings might reveal what the last wrench did.
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Old 04-18-2013, 04:38 PM   #86
Plaka
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Quote:
Originally Posted by brittrunyon View Post
Rotated 180
........OT mark back in window
.......crank mark centered & pointing down
.......cam dimple down but not centered

& yes I have the parts but got the wrong sprocket.

bingo, there's the yellow paint. Someone was working 180 degrees around.

I'd evaluate wear closely. if that chain is tight, Correct the one tooth issue and just button it up. Return the wrong sprocket, put the new chain in storage, you'll need it someday if you keep the thing long enough. You can go in again very quickly if you aren't happy. Whole lot quicker the second time. All you risk is a new gasket. No point replacing parts with lots of life left not to mention the extra work. It will make a nice rattle for you when it wants replaced. I'd use hylomar or similar on the gasket. Ultra blue silicone is pretty nice stuff too. Very thin coat.
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Old 04-18-2013, 04:49 PM   #87
Airhead Wrangler
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Quote:
Originally Posted by Plaka View Post
bingo, there's the yellow paint. Someone was working 180 degrees around.
Where?

Working 180 degrees out doesn't matter as long as you're on the right tooth. If you time it 180 degrees around from the timing mark, it doesn't matter.
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R80ST Gets The HPN Treatment
Seattle to TDF on an airhead

Current rides: HPN #834, '93 R100GSPD "red rocket", '73 R75/5 Toaster mongrel, '80 Ducati Pantah 500SL, '92 DR350, '67 Honda SS50, '80 Honda Chaly.
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Old 04-18-2013, 05:07 PM   #88
Plaka
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Quote:
Originally Posted by Airhead Wrangler View Post
Where?

Working 180 degrees out doesn't matter as long as you're on the right tooth. If you time it 180 degrees around from the timing mark, it doesn't matter.
Not so long as you match everything up. Don't see matching yellow paint. Also, using the existing marks is smart. Why not? Why did someone work 180 out?

Make sure neither pully has an offset key in it.
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Old 04-18-2013, 05:36 PM   #89
brittrunyon OP
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The yellow paint & dark "burn" mark can be seem here, but one tooth left.
Also, there is an obvious yellow mark on the crank right of the dimple. This confused me.



When I go to line the marks up
........I'll rotate 180 and get the two marks closer together
........which sprocket do I turn? The cam clockwise or the crank counter clockwise?

I've heard sealer on the gasket & I've heard no sealer?
I have Yamabond 4

The key on the cam looks good but can't see the crank key.
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Old 04-18-2013, 05:47 PM   #90
Airhead Wrangler
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Quote:
Originally Posted by brittrunyon View Post

When I go to line the marks up
........I'll rotate 180 and get the two marks closer together
........which sprocket do I turn? The cam clockwise or the crank counter clockwise?

I've heard sealer on the gasket & I've heard no sealer?
I have Yamabond 4

The key on the cam looks good but can't see the crank key.
Turn the crank clockwise with a bolt in the nose of it. When you pull the crank sprocket make sure there isn't an offset key like plaka was saying, but I'm guessing this is just a case of fucking up and being off one tooth. An offset key will put it off a few degrees which won't be so obvious when looking at the timing marks. A whole tooth out is too much to be an offset key. It is weird that someone wanted to make their own timing marks though.
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R80ST Gets The HPN Treatment
Seattle to TDF on an airhead

Current rides: HPN #834, '93 R100GSPD "red rocket", '73 R75/5 Toaster mongrel, '80 Ducati Pantah 500SL, '92 DR350, '67 Honda SS50, '80 Honda Chaly.
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