Heavy operation of the clutch lever increases fatigue for the rider, and there is nothing good about it. There are many factors that contribute to heavy operation, and there is no guarantee that simpl...

Often, idling becomes unstable or start-up becomes poor because the engine has not been ridden for a while, even though it used to run fine from the time the engine was started. The procedure is to pr...

When tinkering with carburetors for overhaul or setting up, the most important adjustment for both single and multiple carburetors is the air screw and pilot screw. Both have a fixed reference value f...

To prevent rusting of the front fork inner tube, it is important not to leave the inner tube wet, but the gap between the dust seal and oil seal is often overlooked. In addition to the difficulty of r...