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finger followers

TEN THINGS YOU NEED TO KNOW ABOUT CAMSHAFTS

(1) The word cam refers to an eccentric circular disc. In a four-cycle engine, cams are used to open and close the intake and exhaust valves. The cams are fixed on a camshaft, which is connected via a chain to the crankshaft (thus the position of the cam is fixed in relation to the engine cycle). (2) The cam has lobes which are like eccentric bulges that the valves ride against. As the cam spins, the eccentric lobes push the valves open, while valve springs push them closed. This transfer of rotational …

2012 MOTOCROSS RACING IMPRESSION: SPENDING A DAY ON THE 2012 HUSQVARNA TC250

By John Basher OUR LOVE/HATE RELATIONSHIP WITH THE TC250 The MXA wrecking crew has had a whirlwind romance with the Husqvarna TC250. Much of our experience on the 250 four-stroke should be considered troubled, with only minor glimpses of pure joy and adulation. Nevertheless, MXA test riders have grown to appreciate what the once Swedish, now German-owned Italian manufacturer (confused yet?) has done. Husqvarna has made strides to better the TC250, albeit they have gone against the grain as to what has b…