Electrical Short

My 1977 Bonnie only fires on one cylinder, the right. I have switched (left side) the plug wires, condensers, coil, plug wires, plugs, new points left side, and still have no life to the cylinder. Any suggestions as to where there may be a short in the fabulous, World Class, Lucas electrical system.

 

Sprintdave: Thank you for your reply............ I tried what you suggested and could not see a spark on either cylinder. I also noted that the battery is slowly draining each night possibly indicating a short somewhere in the wiring, isn't that a Lucas Moment. After running the bike for a short while on the right cylinder, I also noticed there was no liquid trace in the left card. I will trace all the wiring again today and also clean the main jet. Nothing rides like an old Triumph, but now I am beginning to understand why all my friends purchased Japanese Bikes.......

 

Thank you once again for your reply and patience...... A mechanic once told me "My best customers do their own mechanical work." Hallelujah........ After chasing wires, swapping everything over at least three times, tearing apart the carb (It's clean now) I finally decided to check the points once again for the 1000 time. Yellow and black left set of points, right cylinder "A" OK, white and black wire, left cylinder, something looks funny. White and black are connected on top of the plastic insulator and not beneath it like yellow and black. Switch over, ignition on, tickle carbs, kick start.... vroom vroom vroom, all is well in River City. The 38 year old Bonnie came to life like the day I drove it home in 1977....

 

Didn't know what chuft is but after looking it up, yes I am..............TY............

 

Another Lucas Moment to Cherish..........OK next electrical problem: Turn signals. Put on the right and the left front twinks with the rear right. I have found something of a short in the arm sticking out of the headlight going to the turn signal housing.... Wiggle the arm around or unscrew the nut and then tighten back and it works for a day or two.... In the past I have run a ground wire from the light inside of the housing to the post and it cured the problem. Any other suggestions would be appreciated.

 

Housing needed tightening (ground). All nicely blinking...