1980 Yamaha XS850 SG Heat Problem

A reader's 1980 Yamaha XS850 SG runs fine until it warms up. Keith Fellenstein offers a few possibilities into why this is happening.

Setting the Points

Keith Fellenstein attempts to help a reader trying to set the points on his Triumph T140 Bonneville engine.

Fouled Spark Plug

Keith Fellenstein explains what might be causing a fouled spark plug for a Yamaha XT500.

Synchronizing Carburetors

Motorcycle Classics’ tech expert Keith Fellenstein discusses different methods of synchronizing carburetors.

Triumph Trident Cylinder Removal

Motorcycle Classics’ tech expert Keith Fellenstein offers advice on how to remove odd nuts and fused piston rings on a Triumph Trident engine.

Honda GL500 Carbs

Motorcycle Classics’ tech expert Keith Fellenstein talks about cleaning Honda GL500 carburetors.

Pressure Check a 2-Stroke Engine

Other than checking compression, carburetion and ignition, the most important test to run on a 2-stroke engine is a leak-down test.

1970 Yamaha XS650 Tune Up

Motorcycle Classics’ tech expert Keith Fellenstein discusses timing a cylinder for a 1970 Yamaha XS650.

Triumph Bonneville T120 Stumble

Motorcycle Classics’ tech expert Keith Fellenstein discusses a potential compression issue on a 1965 Triumph Bonneville T120.

Carburetor Floats: Honda CB1100F

Motorcycle Classics’ tech expert Keith Fellenstein helps solve an issue with carburetor floats on a Honda CB1100F.

Mikuni Carburetor Mixture Setting

Motorcycle Classics’ tech expert Keith Fellenstein gives advice on setting the fuel/air mixture screw on a Mikuni carburetor.

Suzuki Madura: Hard to Start

Motorcycle Classics’ tech expert Keith Fellenstein troubleshoots hard-to-start 1985 Suzuki Madura V4s.

Kawasaki F7-B: Torque Specs

Motorcycle Classics’ tech expert Keith Fellenstein shares torque specs for a 1973 Kawasaki F7-B 175.