Yamaha YZF-R1M

/// ENGINE
ENGINE
Liquid-cooled, DOHC, 16-valves (4-valves / cyl), in-line four
DISPLACEMENT
998cc
BORE AND STROKE
79 x 50.9mm
COMPRESSION RATIO
13:1
MAXIMUM TORQUE
11.5 kg-m (83.2 ft-lbs.) @ 11,500 rpm
ENGINE MANAGEMENT
YCC-T, YCC-I, PWR, TCS, LCS, LIF, SCS, QSS, CCU & SCU
FUEL DELIVERY
Mikuni 45mm throttle body FI
LUBRICATION
Wet sump
IGNITION / STARTING
TCI / Electric
TRANSMISSION
6-speed
FINAL DRIVE
520 series "O" ring chain
/// CHASSIS
SUSPENSION (FRONT)
Ohlins Electronic Racing Suspension (ERS) / 43mm inverted fork / 120 mm (4.7") wheel travel
SUSPENSION (REAR)
Ohlins Electronic Racing Suspension (ERS) - bottom link Monocross / 120 mm (4.7") wheel travel
BRAKES (FRONT)
Dual 320mm discs / 4-piston calipers / ABS & Unified
BRAKES (REAR)
220mm disc / single piston caliper / ABS & Unified
TIRES (FRONT)
120/70ZR17
TIRES (REAR)
200/55ZR17
/// CRITICAL DATA
LENGTH
2,055 mm (80.9")
WIDTH
690 mm (27.2")
HEIGHT
1,150 mm (45.3")
WHEELBASE
1,405mm (55.3")
RAKE / TRAIL
24° / 102mm
GROUND CLEARANCE
130 mm (5.1")
SEAT HEIGHT
860 mm (33.9")
FUEL CAPACITY
17 litres (3.7 Imp. gal.)
WET WEIGHT
201 kg (443 lb)
COLOUR(S)
Carbon Fiber & Liquid Metal

/// Engine
• All new, ultra-lightweight, compact, 998cc, DOHC, 16-valve (4-valves / cyl.), liquid-cooled, in-line four-cylinder engine with "cross plane" style crankshaft.
• The key components of this cutting edge engine design are the "cross plane" crankshaft and an uneven firing order. Both of these features are used on Yamaha's race winning M1 MotoGP racer. The R1 cross plane crankshaft locates the center two rods at a 90 degree plane from the outer cylinders. This means instead of the crank pins aligned on the same plane (a straight line drawn through the center of the crankshaft), they align on 2 planes in the form of a cross... or "cross plane". Working in conjunction with the cross plane crank is an uneven firing order. This R1 engine fires 1,3,2,4 cylinders and the firing intervals are uneven at 270 / 180/ 90 /180 degrees. What all this means to the rider is the most linear torque possible and amazing throttle control. This engine design allows a whole new level of rider - machine communication. One of the most important benefits is the outstanding cornering performance that increased engine control allows.
• The key engineering goal for the new R1 is increased power with excellent controllability. Horsepower increases have gained through increased intake air volume, reduced internal friction and weight reductions. The new R1 is a "rider's machine".
• New, 4-valve cylinder head design features new compact pent roof combustion chambers that utilize lightweight titanium valves on the intake side. The 4-valve design optimizes breathing efficiency and overall engine performance. Combustion chamber volume is carefully monitored to ensure exact volume for maximum power.
• New, larger valves for 2015. Titanium intake valves are 33mm in diameter ('14 = 31mm) while the steel exhaust valves are 26.5 mm in diameter ('14 = 25mm). The lightweight titanium intake valves reduce the reciprocating weight of the intake valves allowing for higher rpms without the concern of valve float.
• New intake port shape provides maximum filling efficiency. The port shape, valve placement and combustion chamber shape induce a tumbling effect of the inbound fuel - air charge that increases combustion speed, power and torque.
• 13:1 compression ratio
• All new "finger follower rocker arms" are used. This system reduces friction allows greater valve lift and provides super accurate control of valve opening and closing at high rpms. The sliding area of the rocker arms feature a DLC (diamond like coating) to reduce friction and wear. Valve adjustment pads sit under the rocker arms
• Valve adjustment intervals are every 40,000 kms.
• Newly designed high performance intake & exhaust cams work in conjunction with the new finger follower rocker arm system.
• New design, lightweight, closed deck aluminum cylinder features a ceramic coating applied directly to the liner-less aluminum block to ensure uniform heat dissipation reduced friction and reduced weight. Closed deck design allows the cylinders to be spaced more closely together, providing a narrower engine. Cylinder is a stand-alone design (not integrated into the upper crank case).
• Offset cylinder / crank design offsets the cylinder block relative to the crankshaft (to the exhaust side) to reduce frictional losses between the pistons and the cylinder wall during the power stroke for improved power output.
• All new, short skirt, forged aluminum pistons offer lightweight, fast throttle response and great reliability. The piston features a box shaped "bridge box " on the underside for increased rigidity and a special Deflic coating to further reduce frictional losses. Ring expansion tension is optimized to reduce friction.
• New piston oil coolers spray oil at the underside of the piston to reduce piston temperatures.
• New, narrower Cross plane crankshaft design. Crankshaft is over 25 mm (1") narrower than the '14 version.

Source : http://www.totalmotorcycle.com/