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84 xlh, cam, help needed, start, timing

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  #11  
Old 28th June 2013
cowboy-daddy cowboy-daddy is offline
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Thank you all for all of your help and advice. Here is a little more visual idea of what is going on:


Cams after original re-assembly (as they are right now, no idea where the Pinion gear is indicated to)


Turning over but not firing.


Just a little fun video of my flywheel truing.

Regardless of what timing mark I see through the sight hole, I know I am TDC on the front cylinder. I can watch it and have done the pencil/straw trick and used a dial indicator and each time I get back to the top I get the line in the window. BUT.... am I on the right stroke? I am getting confused with the compression / exhaust / front / rear TDC. There is only one time during the cycle when the front piston comes to the top of the cylinder, right?


On a side note, do my plugs have to go to the correct side of the coil or does it not matter on this year bike? Right now I have them as factory but when mounted on the side of the engine, I have to cross the wires to get the the proper plug. Is this correct, or does it not matter?
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  #12  
Old 28th June 2013
Mosey Mosey is offline
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The piston comes to the top TWO times during one cycle - once on compression and once on exhaust. The easy way to determine compression stroke on the front cylinder is to raise the pushrod tubes and watch for the intake valve to close.
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  #13  
Old 28th June 2013
cowboy-daddy cowboy-daddy is offline
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Understanding that it is irrelevant until I get my Cam gears indexed properly to the pinion gear, I would watch the front most push rod (#4) until it goes all the way up? That would be fully closed on the compression stroke on the front cylinder?
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  #14  
Old 28th June 2013
simeli simeli is offline
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I can't tell for sure but the best I can make out from the picture with the grease in the way the tooth I have the arrow on should be lined up with the cam as shown. Clean away all the garbage and find the slash mark on the pinion gear.



This is from an older bike I am not sure how yours would be marked.

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  #15  
Old 29th June 2013
cowboy-daddy cowboy-daddy is offline
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Yup, it's there. Here is a close up and a little better pic. Like Mick and everyone is saying, I know I gotta find the key on the pinion shaft and start again from there.


Any thoughts on the coil wires?
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  #16  
Old 29th June 2013
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Those look good, but you need to turn the engine and watch when the intake lifter #3 raises up and the DROPS to its lowest position,. that is intake valve closed. continue turning untill vert line is visable in access hole. This is the advanced timing mark. Install points plate and set flyweights accordingly.
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  #17  
Old 29th June 2013
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Sorry, I hope the flyweights are something to do with the points plate cause mine has electric timing and I have NO idea what flyweights are.
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  #18  
Old 29th June 2013
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Then post some pics of your ign system and whatever was under the cover plate.
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  #19  
Old 29th June 2013
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Quote:
Originally Posted by cowboy-daddy View Post
Understanding that it is irrelevant until I get my Cam gears indexed properly to the pinion gear, I would watch the front most push rod (#4) until it goes all the way up? That would be fully closed on the compression stroke on the front cylinder?


Push rod at it's lowest point is valve closed.
Those cams look like they are lined up and good to go.

If the motor is sucking in at the exhaust spigots(ports) and blowing the fuel/air mix out of the carb, perhaps it's a good thing you don't have any spark firing.

Sounds like there are two problems here, no F/A intake/compression AND no fire.

The no fire could be related to the kill switch on the bars or other simple thing, but until you get the proper sequencing of the 4 stroke motor,,,, suck, squeeze, bang, blow I wouldn't worry about the firing off of it for now....

Did you do any head work? Could the valves be sticking open?
Can you physically see them moving thru the plug hole?(with a good light and at the perfect angle, I can see mine)
Rather strange problem here with this one.
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  #20  
Old 29th June 2013
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If you didn't index the pinion gear to the pinion shaft correctly, everything is off from there. Only way to know is to remove the pinion gear and check the indexing. Everything else is just a waste of time until then.

Eric
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