timing problems please help
- Thread starter wan37
- Start date
well I thought that it's impossible but it's out of time for sure.Maybe when I installed the cen clutch and had the rope in the spark plug hole to tighten the clutch.That's the only way, that I think did it.I'm going to replace the magnet because I was going to see if key was aligned and took it off and I kinda buggered the magnet so I'm just wondering if that may help.I just want too make sure.I think it kinda moved a little because the key and the magnet came out together and it was hard to get off.Is there any certain way to putting it back on?
Sometimes the slot in the magneto will have burrs .I have taken a small fine file and just cleaned up the opening . Make sure you clean up any metal filings off the magneto. Also the magneto can only go on one way or the timing will be off . Piston at top dead center key on crank should be at two o'clock.
It's virtually impossible to remove the magnet with the key and the key be any good. When installing a new key, my I suggest super glue on the key. This will keep the key in place and easier to install the magnet.
Magnet placement here....
http://s982.photobucket.com/albums/ae309/Ron-Becker/Magnetto/
It's also possible to install the magnet backwards. I always make sure to mark the outside of the magnet before taking it off. 
Venice, you make me laugh. After all the engines you've been into, you still have to mark the magnet?It's also possible to install the magnet backwards. I always make sure to mark the outside of the magnet before taking it off.
Well I pull the magnet off and it was stubborn to come off and the key way came with it.So I wipe it off and glue the key back on shaft and let it dry for about 3or so hrs.Then I put the magnet back on and tighten it down and it worked like magic its back in time right.I like the way it starts now,I can put bike on kick stand pull the clutch in a kick about half turn on pedals and she starts.Thanks guys.I would of never known it was out time if it wasn't for you people.
the key way slot must have a little play in it.Thats all I know but it worked can't really tell you why but it did.It starts on first try cold or hot now.I read this grubee link so try it and it work.I just got lucky.Its talk about the key slot
http://www.grubeeinc.com/USA/Magneto Mystery.html
http://www.grubeeinc.com/USA/Magneto Mystery.html
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Obviously the rotor was installed correctly, but I can't figure out how it could be out of time without the key being stripped.
Hey guys,
I just gathered another motorized bicycles from a broke college kid.
Gonna give it to #2 who needs local transportation abt town.
The young fellow said there was a timing problem with the slant head motor.
He said the rotor is not indexed.
I never had a 66 slant head.
I'd really like to hear about that MM adjustable rotor... sounds like a valuable improvement.
Who is running one of those?
Do you like it a lot?
Did it make a significant improvement in your performance?
Tnx
rc
I just gathered another motorized bicycles from a broke college kid.
Gonna give it to #2 who needs local transportation abt town.
The young fellow said there was a timing problem with the slant head motor.
He said the rotor is not indexed.
I never had a 66 slant head.
I'd really like to hear about that MM adjustable rotor... sounds like a valuable improvement.
Who is running one of those?
Do you like it a lot?
Did it make a significant improvement in your performance?
Tnx
rc
I have one. I think it's worth it. My motor was a little lazy accelerating, compared to other motors just like it. After advancing the timing about the width of the key, it feels like I expected.
I think you could do the same thing with the stock rotor, especially for expermentation. Just remove the rotor, and take out the key. Then when you bolt the rotor back down use a star washer to lock it in place.
I played around with it a little bit. Slightly retarded was suck. Slightly advanced was a little better than the stock position.
OK
Tnx Biknut!
I shall do just that...
I'll fiddle around a bit and make up one of those offset keys, to advance the timing just a tad.
the 48cc I run has a way gud bottom end... too gud!
It will lug down to slower than walking speed when I try it on a hill that is just beyond it's ability. Undoubtedly NOT gud for the engine bearings!
That, and the combination of NOT having a real gud top end speed makes me pretty suspicious the timing could be improved.
I have been scouting for parts and pieces to build rohmells cdi replacement, but the parts just haven't come my way yet... That must also be a good way to improve ignition. Perhaps even better???
I dunno...
I can make an offset key fairly easy.
Tnx
rc
Tnx Biknut!
I shall do just that...
I'll fiddle around a bit and make up one of those offset keys, to advance the timing just a tad.
the 48cc I run has a way gud bottom end... too gud!
It will lug down to slower than walking speed when I try it on a hill that is just beyond it's ability. Undoubtedly NOT gud for the engine bearings!
That, and the combination of NOT having a real gud top end speed makes me pretty suspicious the timing could be improved.
I have been scouting for parts and pieces to build rohmells cdi replacement, but the parts just haven't come my way yet... That must also be a good way to improve ignition. Perhaps even better???
I dunno...
I can make an offset key fairly easy.
Tnx
rc
I tried advancing (& retarding) the timing on one of my best bikes & really couldn't tell the difference... One thing that should be pointed out here is that air cooled engines need to have the timing WAY SLOWED DOWN or the engine will run too hot!
(Anyone who knows how to work on old VWs or Harleys knows this).
(Anyone who knows how to work on old VWs or Harleys knows this).
