Honda CB250 CL250 [4/219] Features

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FEATURES The engines used on these model have the inlet and exhaust system designed to provide high output and the functional components are layed out efficiently for high performance The frame effectively utilizes the combination of steel sheet and tubing to produce a lightweight and sturdy unit Further the motorcycles are designed to with stand high speed riding operation on rough roads and other unusual road conditions The CL model engines are based on the CB model engine with the following changes different valve timing different carburetor setting and changes have also been made to part of the frame for conversion to a sports motorcycle for touring and riding over rough fields ENGINE 1 Engine design is of a 4 cycle aircooled side by side vertical twin cylinder over head camshaft gasoline engine 2 The cylinder head is an aluminum alloy casting made independent of the camshaft and rocker arm support housing for greater strength and effective cooling 3 Tappet clearance adjustment Adjustment for the tappet clearance is made by rotating the eccentric rocker arm pin 4 Valve mechanism The camshaft is driven by an endless cam chain drive system which is kept under constant tension by an automatic hydraulically operated chain tensioner Further thei chain guide roller is installed to provide smooth chain operation under all types of operating condition assuring quiet and trouble free service 5 Carburetor The carburetor is a variable venturi type which automatically operates the throttle valve by the suction pressure and provide a venturi opening consistant with the engine speed The operation of the throttle grip is constantly maintained to provide engine speed without overloading 6 Crankshaft Ball bearing is used to mount the right side while needle bearings are used for the center and left side mounting 7 Primary reduction The use of the double spur gear has eliminated the noise and increased the service X life of the gears X 5

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