1972 Triumph T100R Stalling Problem

Reader Contribution by Keith Fellenstein
Published on June 1, 2016
article image

Editor’s note: If you’re having trouble with that old Suzuki, BSA or BMW, Keith Fellenstein is your guy. From motorcycle tuning tips to detailed motorcycle engine repair, he can draw from a wealth of experience to help guide you to success. Send questions to: Keith’s Garage, Motorcycle Classics, 1503 SW 42nd St., Topeka, KS 66609, or send an e-mail with “Keith’s Garage” as the subject.

Stalling problem

Q: I have a restored 1972 Triumph T100R that stalls at idle. My mechanic added a Boyer electronic ignition, but left the 12-volt coils in. It has original electrics other than that, including the alternator/stator. He tuned the new Amal carbs twice and adjusted the timing twice, to no avail. Finally, he said I just have to blip the throttle when coming to stops to prevent the stall. I am wondering if this is an electrical issue or a carburetor issue. The carbs are brand new from England. They have been synchronized carefully. Could the problem be the 12-volt coils? I have heard that the Boyer prefers 6-volt coils. It starts right up every time and idles. It’s just when I run the bike normally then come to a normal stop it dies, as if it runs out of fuel or the spark to the plugs dies. This has ruined an expensive and long-term restoration. The mechanic said he has done everything he can and that it’s my riding style. I don’t believe that, as I’ve had Triumphs all my life and none have done this. Bill/Rhode Island

Comments (0) Join others in the discussion!
    Online Store Logo
    Need Help? Call 1-800-880-7567