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  #1  
Old 02-24-2010, 02:12 PM
mack mack is offline
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Timing Mark

So, while I'm cleaning the motor I, rotate the it until I feel where the top of the piston stroke is. I look down at the timing mark and this is what I see. If you look closely, you'll notice that the pointer is not where it's supposed to be. The vacum hose is off. Is this just a matter of moving the pointer. Also, while i'm in the process is there any maintenance I should do to the thing while the cover is off. P.S remember I'm not a mechanic so try to stick to technical terms like, "thing ma bobs" and "do hicky's"
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79 XS 1100 SF Special
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http://i946.photobucket.com/albums/a...ps6932d5df.jpg

81 XS 1100 LH MNS
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http://i946.photobucket.com/albums/ad305/mack-055/2.jpg

83 XVZ
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78 XS 11E
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Last edited by Ken Talbot; 02-25-2010 at 09:09 PM.
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  #2  
Old 02-24-2010, 02:16 PM
randy randy is offline
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What picture?
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Old 02-24-2010, 02:24 PM
mack mack is offline
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oops

[/IMG]

Thaought I had this figured out
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79 XS 1100 SF Special
HERMES
original owner
http://i946.photobucket.com/albums/a...ps6932d5df.jpg

81 XS 1100 LH MNS
SPICA
http://i946.photobucket.com/albums/ad305/mack-055/2.jpg

83 XVZ
Long Hauler for SWMBO
http://i946.photobucket.com/albums/a...9_edited-1.jpg

78 XS 11E
IOTA
under restoration




Frankford, Ont, Canada
613-398-6186
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  #4  
Old 02-24-2010, 02:29 PM
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DGXSER DGXSER is offline
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Picture link is not working. What your looking for is TDC of No 1 piston, not just any piston, so it coud easily not be on the mark from the "feel" method you described.

If you want to check the mark, pull the spark plug (the thing-a-ma-bob that black thin wire looking thing is plugged onto that is on top of the big metal looking do-hickey) Now put a screwdriver or a coat hanger, or something longer than your hand down into the spark plug hole. Crank the engine over clockwise by hand and watch your gizmo rise and or fall. When it rises up and stops rising, mark that spot on the plate where the pointer is pointing with an erasable marker of some type. Now continue turning the engine until said gizmo starts to drop again, mark that spot as well. The point in the middle of those two marks is TDC of no 1 piston. and that is what should be close to the pointer.
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  #5  
Old 02-24-2010, 02:35 PM
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Picture

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79 XS 1100 SF Special
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original owner
http://i946.photobucket.com/albums/a...ps6932d5df.jpg

81 XS 1100 LH MNS
SPICA
http://i946.photobucket.com/albums/ad305/mack-055/2.jpg

83 XVZ
Long Hauler for SWMBO
http://i946.photobucket.com/albums/a...9_edited-1.jpg

78 XS 11E
IOTA
under restoration




Frankford, Ont, Canada
613-398-6186
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Old 02-24-2010, 02:38 PM
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DGXSER DGXSER is offline
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Actually, you are pretyt much exactly on the mark!! The C mark is for setting the cam chain tensioner and not timing. The F is the timing mark.

Check Catatonic Bugs signature for access to a manual, looks like you need one.
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81 XS1100 Special - Humpty Dumpty
80 XS1100 Special - Project Resurrection


Previously owned
93 GSX600F
80 XS1100 Special - Ruby
81 XS1100 Special
81 CB750 C
80 CB750 C
78 XS750
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  #7  
Old 02-24-2010, 02:39 PM
mack mack is offline
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timing

The head is off the bike so there is no problem finding the top of the stroke at no#1, and that is where the picture is taken at.
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79 XS 1100 SF Special
HERMES
original owner
http://i946.photobucket.com/albums/a...ps6932d5df.jpg

81 XS 1100 LH MNS
SPICA
http://i946.photobucket.com/albums/ad305/mack-055/2.jpg

83 XVZ
Long Hauler for SWMBO
http://i946.photobucket.com/albums/a...9_edited-1.jpg

78 XS 11E
IOTA
under restoration




Frankford, Ont, Canada
613-398-6186
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  #8  
Old 02-24-2010, 02:55 PM
randy randy is offline
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You should be lining up the pointer to the "F" mark. The "T" is for cam timing and the "C" as DGXSER previously wrote is for setting cam chain tension.
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  #9  
Old 02-24-2010, 03:05 PM
mack mack is offline
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ya

The piston is at the TDC now, then the pointer is way off. So do I adjust the pointer to match TDC or is this difference associated with what I've heard refered to as dwell?
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79 XS 1100 SF Special
HERMES
original owner
http://i946.photobucket.com/albums/a...ps6932d5df.jpg

81 XS 1100 LH MNS
SPICA
http://i946.photobucket.com/albums/ad305/mack-055/2.jpg

83 XVZ
Long Hauler for SWMBO
http://i946.photobucket.com/albums/a...9_edited-1.jpg

78 XS 11E
IOTA
under restoration




Frankford, Ont, Canada
613-398-6186
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  #10  
Old 02-24-2010, 03:13 PM
randy randy is offline
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Rock the crank back and forth to make sure you have true TDC. The crank can move a few degrees either way and the piston will not appear to move. If the pointer is still off, reposition the pointer now to correspond with TDC on #1. Line it up with the "F" mark. Each graduation of the plate is equal to 5 degrees. Static ignition timing is 5 degress BTDC.
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Old 02-24-2010, 03:32 PM
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Shoot, I wish the timing mark on my XS11F (which runs very, very well) was that close...

Patrick
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  #12  
Old 02-24-2010, 05:39 PM
mack mack is offline
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maintenance

Ok, how about any maint. requirements. Anything to check on or do before I put this dude back together and go for a start up.
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mack
79 XS 1100 SF Special
HERMES
original owner
http://i946.photobucket.com/albums/a...ps6932d5df.jpg

81 XS 1100 LH MNS
SPICA
http://i946.photobucket.com/albums/ad305/mack-055/2.jpg

83 XVZ
Long Hauler for SWMBO
http://i946.photobucket.com/albums/a...9_edited-1.jpg

78 XS 11E
IOTA
under restoration




Frankford, Ont, Canada
613-398-6186
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  #13  
Old 02-24-2010, 06:42 PM
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I would not move the pointer unless it was already moved by a PO. If the paint at the base of the pointer to the casing is not broken, then the pointer is at it factory position. Unless it is bent or otherwise damaged it's position should not be altered. There is some Dwell at the top of the pistons stroke where the piston is not really noticeably moving up or down. You may find that the pointer in in the middle of this range. The other thing is that the timing wheel on these bikes is not a "perfect" fit. there is some play there as well. If it is truly off the mark, move the wheel within its free play, not the pointer.
Rob
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  #14  
Old 02-24-2010, 07:19 PM
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TopCatGr58 TopCatGr58 is offline
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That's not entirely accurate!

Hey Mack,

I thought something didn't sound quite right, so I checked the MANUAL, and it confirmed what I thought!

The "T" mark is the TDC indicator mark. The "F" mark is the timing mark, but it's for checking the static ignition timing with a timing light with the engine running, the vac. adv. capped, and idling at about 1K rpm, the "F" mark is appx. 5 degrees BTDC.

IF you'll look closely at the MARKS, you can see and check and measure the spacing for the 20 and 40 degree marks, the same distance will be from the 20 degree mark to the "T" mark, which would indicate "0"/ZERO=TDC. The "F" mark lines up with 5 degrees BTDC.

Having the head off makes it quite easy to see when the piston isn't moving up or down, but there's still a bit of slack where the crank can spin a few degrees before the piston starts to move in the opposite direction, so as has been stated, it looks DARN CLOSE, and unless you have a gauge/micrometer that you can put against the top of the piston to see when it has truly stopped moving, and then also note when/where on the timing plate the piston just starts to move both up and down, then mark the position in between those 2 points would provide a more accurate TDC point.

T.C.
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  #15  
Old 02-24-2010, 08:29 PM
mack mack is offline
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I'm learning

Ok several of you pro's state that it's close enough to leave alone. I'll do that. I'm getting antsy about getting the frame back from painting and starting to put it back together. I just want it to fire on the first pass so I don't have to second guess why it didn't. Still waiting for carb parts, going to follow someones advice about replacing the 31 year old coils with new, so I have at least a good starting point there. Anyone know if the vacum advance listed in the tech bulletin is still available? Are there points or anything that should be replaced?
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79 XS 1100 SF Special
HERMES
original owner
http://i946.photobucket.com/albums/a...ps6932d5df.jpg

81 XS 1100 LH MNS
SPICA
http://i946.photobucket.com/albums/ad305/mack-055/2.jpg

83 XVZ
Long Hauler for SWMBO
http://i946.photobucket.com/albums/a...9_edited-1.jpg

78 XS 11E
IOTA
under restoration




Frankford, Ont, Canada
613-398-6186
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