Bonneville America Forums Forums General Motorcycle Forums Other Bikes T120 from He!! update

Are you using the timing plunger? I never liked the electronic ignition for those bikes. I always ran the dual points. Lucas makes a really nice replacement for the breaker plate, better than the OEM and the points for it are better too. The crank is drilled for TDC and fully advanced firing position.Set the left cyl on the compression stroke, the plunger should lock the crank in the adv. spot and the hold the cam lobe to fully advanced then rotate the breaker plate until the left point just opens with the cam lobe still held in the fully advanced position. Do the same for the 2nd cyl. except move the point holder on the breaker plate instead of the whole plate. Very simple, can't tell you the procedure for the electronic ignition you have.

You can remove the small round cover on the front of the primary and use a timing light to check the timing with a timing light. Always get power from a seperate battery for the timing light NOT the battery in the bike , the battery in the bike could give you a false reading. There is a pointer under that small round cover and marks for each cyl, on the alternator rotor.