The 2001-2012 Yamaha Raptor 660, 700 DIY repair and service manual by Haynes, covers: • Yamaha Raptor 660, 2001-2005 • Yamaha Raptor 700, 2006-2012 Book Excerpt: 2001-2012 Yamaha Raptor 660, 700 Repair Manual GENERAL ENGINE OVERHAUL PROCEDURES CYLINDER COMPRESSION - CHECK • Among other things, poor engine performance may be caused by leaking valves, incorrect valve clearances, a leaking head gasket, or worn piston, rings and/or cylinder wall. A cylinder compression check will help pinpoint these conditions and can also indicate the presence of excessive carbon deposits in the cylinder head. download Study Guide Question Answer For The Pearl torrent. • The only tools required are a compression gauge and a spark plug wrench. Depending on the outcome of the initial test, a squirt type oil can may also be needed. • Start the engine and allow it to reach normal operating temperature, then remove the spark plugs (see Chapter 1, if necessary). Hobart 2912 Parts Manual download.