Returning bike to stock ignition.

fiftynineab

XS650 Enthusiast
Messages
64
Reaction score
54
Points
18
Location
san francisco CA
What I have,
1979 xs650F its a standared.
First off I have a manual only I don't have it with me. So I apologize for asking questions that I probably could find in there.
What's going on is I am returning the bike to stock ignition and centrifugal advance after removing a Pemco. Luckily I saved all the stock parts.
I'm wondering what does torque spec is on the nut that holds the centrifugal advance?
 
20190704_154516.jpg
20190704_154516.jpg
 
Just curious why do you want to go back to points???
 
OK makes sense now. Boyer is not a bad choice. I'm running a Boyer and have no problems with it.

I saw that ignition. Then I read a bunch of stuff about how the plate warps and burns out. And then I read another thing from an old guy saying to run everything stock and it doesn't break. So I'm just going to try and get it back to stock and running. And maybe down the road Morris Magneto.
 
I've only got 600 or miles on my Boyer and it has worked fine.
everything stock and it doesn't break.
Stock ignition is very robust no doubt. When it comes to tuning is when the problem comes in. The 650 is actually 2 engines running as one because of the 2 sets of points and 2 carbs. If the points are set exactly the same then things are great. All the tuning guides tell you to adjust the valves , cam chain and points before doing anything to the carbs. Reason is if one cylinder is firing a degree or so differently from the other you have to compensate with the carb adjustments. Electronic ignition takes timing differences out of the equation. I know with my XS2 that I bought in 76 that it is far easier to tune with electronic ignition than it ever was with points. It runs a hell of a lot smoother than it did in the 70s or 80s. Points can break, but if you understand them you can get them to limp you home. Electronic ignition not so much.
 
I saw that ignition. Then I read a bunch of stuff about how the plate warps and burns out. And then I read another thing from an old guy saying to run everything stock and it doesn't break. So I'm just going to try and get it back to stock and running. And maybe down the road Morris Magneto.

Read through this link and the posts by Goran Persson and look at the pics in his link........... The warping is due to the plate standoffs not sitting square in the XS650 points housing. This is fixed by making a stepped standoff for the plate.............Has nothing to do with heat, as the first poster thinks, and heat has been used recently by one as a reason for the Boyer plate to warp in stead of the step in the points housing

http://xs650temp.proboards.com/thread/13335/boyer-ignition-problem
 
Last edited:
Read through this link and the posts by Goran Persson and look at the pics in his link........... The warping is due to the plate standoffs not sitting square in the XS650 points housing. This is fixed by making a stepped standoff for the plate.............Has nothing to do with heat, as the first poster thinks, and heat has been used recently by one as a reason for the Boyer plate to warp in stead of the step in the points housing

http://xs650temp.proboards.com/thread/13335/boyer-ignition-problem

Thanks for adding that in Skull, I think that detail is often overlooked.
 
Back
Top