Honda TRX200, ATC250, Fourtrax 250 ATV Repair Manual 1984-1987

This DIY repair workshop manual by Clymer, covers 1984-1987 Honda ATVs with shaft-drives, including the following models:

• Honda TRX200
• Honda ATC250SX
• Honda ATC250ES
• Honda Fourtrax 250

Book Excerpt: 1984-1987 Honda TRX200, ATC250, Fourtrax 250 ATV Repair Manual 200cc ENGINES

The engine is an air-cooled, 4-stroke, single cylinder 200 cc design with a single overhead camshaft. The crankshaft is supported by 2 main ball bearings in a vertically split crankcase. The camshaft is chain-driven from the timing sprocket on the left-hand side of the crankshaft and operates rocker arms that are individually adjustable. Engine lubrication is by wet sump with the oil pump located on the right-hand side of the engine next to the clutch. The oil pump delivers oil under pressure throughout the engine and is gear driven by a gear on the crankshaft. This chapter contains information for removal, inspection, service and reassembly of the engine. Although the clutch and transmission are located within the engine, they are covered in Chapter Six to simplify this material. Table 1 provides complete specifications for the engine and Table 2 lists all of the engine torque specifications. Table 1 and Table 2 are located at the end of this chapter. Before beginning work, re-read Chapter One of this book. You will do a better job with this information fresh in your mind. Throughout the text there is frequent mention of the right-hand and left-hand sides of the engine. This refers to the engine as it sits in the ATV?s frame, not as it sits on your workbench. The right-hand and left-hand refers to a rider sitting on the seat facing forward.
ENGINE PRINCIPLES Figure 1 explains how the engine works. This will be helpful when troubleshooting or repairing the engine.
ENGINE COOLING Cooling is provided by air passing over the cooling fins on the engine cylinder head and cylinder. It is very important to keep these fins free from buildup of dirt, oil, grease and other foreign matter. Brush out the fins with a whisk broom or small stiff paint brush. CAUTION: Remember, these fins are thin in order to dissipate heat and may be damaged if struck too hard.
SERVCING ENGINE IN FRAME The following components can be serviced while the engine is mounted in the frame (the ATV?s frame is a great holding fixture for breaking loose stubborn bolts and nuts).

Subject: 1984, 1985, 1986, 1987 Honda shaft-drive TRX200, ATC250SX, ATC250ES, Fourtrax 250 service, maintenance, repair. ISBN-10: 0892874295 ISBN-13: 9780892874293 | Clymer M455