Sears 106SS Electrical Troubles

| 10/7/2015 1:42:00 PM

Motorcycle Classics tech expert Keith Fellenstein

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, 1503 SW 42nd St., Topeka, KS 66609, or send an e-mail with “Keith’s Garage” as the subject.

Electrical troubles

Q: I have a Sears 106SS motorcycle that I won on auction. I had the bike shipped to my house. I got it running great, and it looks awesome. It starts on the first kick all the time. My only problem is that when I hit the rear brake, the bike bogs down like I am hitting a kill switch. I checked the wiring and it looks fine. I also put in a new bulb. The brake switch has two wires that are connected together and just push into the back of the switch. I am having trouble locating that switch. These bikes were manufactured by a company in Milan, Italy. The manufacturer is called Gilera. Can you help me out with any suggestions? Thanks for your help. — Mark Canavin/Aston, Pennsylvania

A: I haven’t had any luck finding a wiring diagram for this bike, so the following is just guesswork. My 1964 Triumph T100SC with Lucas ETC ignition can do a similar thing if the rear bulb shorts out, as it grounds the flywheel magneto ignition and the engine dies. Try removing the taillight bulb and see if that makes a difference. If it does, there is something wrong with the wiring of the bulb or socket; probably hot and ground leads are switched. If it makes no difference, then the problem is farther up the chain. Try disconnecting at the brake switch and testing again. One of these things should be the culprit. Good luck, and do let me know if any of this works or if I have to delve deeper.

The sound and the fury: celebrate the machines that changed the world!

Motorcycle Classics JulAug 16Motorcycle Classics is America's premier magazine for collectors and enthusiasts, dreamers and restorers, newcomers and life long motorheads who love the sound and the beauty of classic bikes. Every issue  delivers exciting and evocative articles and photographs of the most brilliant, unusual and popular motorcycles ever made!

Save Even More Money with our RALLY-RATE plan!

Pay now with a credit card and take advantage of our RALLY-RATE automatic renewal savings plan. You save an additional $5.00 and get 6 issues of Motorcycle Classics for only $29.95 (USA only).

Or, Bill Me Later and I'll pay just $34.95 for a one year subscription!

Facebook Pinterest Instagram YouTube Twitter