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timing 1-4 points
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timing 1-4 points
Hello to all. I am new to this forum & posted this question in the tuning section yesterday. I think this is a better place to post my questions. I am helping my son set up the points on his newly acquired 78 750E & things aren't going as the shop manual says it should. Let me begin by saying the bike starts right up but it isn't idling very smooth. I set the point gaps as per specified .014. When I crank the engine over to get the 1-4 "F" mark in the sight window the points should be just starting to open (according to the service manual). They are open no matter where I adjust the points plate. When I check with the timing light the 1-4"F" mark is not near the sight window. When I check the 2-3"F" mark with the light it is in time. What could be wrong? I thought it might be as simple as the points cam 180 degrees out of time but it doesn't work out that way either....in fact it doesn't even start. So we set the point cam back to where it was when we started. I see there is a ND & KD points set up. The manual only shows the ND. Is it possible the wrong set up is in this bike? Maybe the wrong backing plate? Any help would be appreciated.Tags: None
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oldbikedude
What happened to your other thread?
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oldbikedude
You likely have the ND points setup.... Does your condenser setup look like this?
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oldbikedude
Tom, thanks for the reply. That is the points set up I am working with. The points open & close just fine but I am having trouble setting the timing. In the manual it says to time the 1-4 points: turn the engine over until 1-4"F" mark is lined up with the fixed timing mark in the sight window. Then it says to turn the points plate until the 1-4 points are "just starting to open". Then use a timing light to get it perfect. When I set the 1-4"F" mark to the fixed timing mark in the sight window I can not get the points to a point where they are just starting to open. Using all the adjustment in the slotted points plate the 1-4 points remain open (when the 1-4"F" mark is lined up). 2-3 points are fine. I understand once I get 1-4 points set up I will have to readjust the 2-3 points to get them back in time. As things are now using the timing light the 1-4 "F" mark is nowhere near the sight window yet 2-3 points set up just like it's suppose to........Wierd Thanks again for the help.
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Wouldn't be the first time aftermarket points haven't been very well made and don't fit right. Also, I recall having to slot backplates to get sufficient movement on them, because of badly made parts.
Electronic ignition was the greatest thing since sliced ham, as you are probably aware.---- Dave
Only a dog knows why a motorcyclist sticks his head out of a car window
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oldbikedude
Thanks Grimly. I already slotted the points plate to get more adjustment but it is clear to me that is not the answer to my problem. Not sure whats going on. I need to spend more time with it when it gets a little warmer out.
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Just a wild guess here, but where was the points cam when you set the gap?
I'm guessing it was at the wrong point, otherwise the points would close1978 GS 1000 (since new)
1979 GS 1000 (The Fridge, superbike replica project)
1978 GS 1000 (parts)
1981 GS 850 (anyone want a project?)
1981 GPZ 550 (backroad screamer)
1970 450 Mk IIID (THUMP!)
2007 DRz 400S
1999 ATK 490ES
1994 DR 350SES
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oldbikedude
where was the points cam when you set the gap?
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You shouldn't have to enlarge the slot on the points plate
Post up a picture of what you have going on there
I'm assuming you are replacing the old points?1978 GS 1000 (since new)
1979 GS 1000 (The Fridge, superbike replica project)
1978 GS 1000 (parts)
1981 GS 850 (anyone want a project?)
1981 GPZ 550 (backroad screamer)
1970 450 Mk IIID (THUMP!)
2007 DRz 400S
1999 ATK 490ES
1994 DR 350SES
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oldbikedude
Just an update: We replaced the contact points & things set up nicely. All is well now. Thanks for all your help. I'm sure this is not the last issue I'll need help with.
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