XR600R / XR650R / XR680R  Comparison Chart

TEM

XR600R

XR650R

XR680 Baja Bike

Cylinder Angle

15 degrees

13 degrees

 More vertical cylinder allows space for radiators and hoses, while maintaining front wheel clearance.

13 degrees

 More vertical cylinder allows space for radiators and hoses, while maintaining front wheel clearance.

Ignition

oil bath

Dry

Reduced parasitic drag. Larger main bearings with left side seal keeps oil out of ignition cavity. 35,000volt

Dry

Reduced parasitic drag. Larger main bearings with left side seal keeps oil out of ignition cavity. 45,000 volt coil.

Clutch access cover

none 

Yes

Magnesium CR-type cover for easier clutch access. Cover is sealed with an 0-ring gasket.

Yes

Magnesium CR-type cover for easier clutch access. Cover is sealed with an 0-ring gasket.

Cylinder head

RFVC 

4-valve

Liquid-cooled

4-valve

Liquid-cooled

Intake valve size

36 mm 

37mm

40mm

Increased valve area.

Exhaust valve size

31 mm 

32mm

Increased valve area.

32mm

 

Valve cover caps

4

2

2

Bore & Stroke

97 x 80mm 

100 x 82.6mm

XR650R piston is 10.6 grams lighter.

Weisco 102.4 X 82.6mm

Connecting rod length

134mm 

140mm

Rod is carbon-nitride treated.

Carrillo Rod

I-Beam much stronger then stock & rebuildable.

Intake valve lift

8.8mm 

9.2mm

9.5mm Increased valve lift. 265

Exhaust valve lift

8.5 mm 

9.2 mm

9.5mm Increased valve lift. 260

Intake cam timing: open closed

5 degrees btdc
40 degrees atdc

15 degrees btdc
45 degrees atdc

Barnum’s Pro Mid Cam

 

Exhaust cam timing: open closed

45 degrees bbdc
5 degrees atdc

 45 degrees bbdc
15 degrees atdc

Two exhaust cam lobes operate two exhaust valves via rocker arms.

Cam chain

118 links

122 links 

K&L Timing chain

Cam chain tensioner 

1 -way
ratchet-type

XR 400-type
  (spiral spring)

 

Throttle bore diameter 

38 mm

40 mm

 Edelbrock 40mm X 42mm

Carburetor body material 

Zinc 

Aluminum 

Aluminum

Clutch gear teeth 

70

71

 71

Primary ratio 

2.188

1.651

 1.651

Clutch springs

4 Setting load: XR600R:120 kg

5 XR650R: 108 kg 


 Rekluse Auto Clutch Z-Start

Primary drive gear 

32 teeth

43 teeth

 43 teeth

Main shaft 

13-tooth

12-tooth

For easier shifting

Countershaft

straight-spline 

involute-spline

Involute - spline For easier shifting

C-1 gear

31 teeth

37 teeth

 

M-2 gear

17t

16t

 

C-2 gear

28t 

34t

 

M-3 gear

20t

19t

 

C-3 gear

25t

31t

 

M-4 gear

23t

21t

 

C-4 gear

23t

28t

 

M-5 gear

25t

26t

 

C-5 gear

21t

29t

 

Final drive 

14/48 

14/48

15/49 Ironman Sprockets

Shift fork guide
shaft diameter

7.4 mm

9.0 mm

For less flex, allowing
smoother shifts with
less effort

Rear disc
brake diameter

220 mm

240 mm

Increased stopping power

Rear axle diameter

17 mm

20 mm

 Increased rigidity

Chain adjuster

Snail-type

CR-type

Swingarm end is closed
Front disk           brake diameter 240mm 240mm 280mm

Front brake hose

2-ply vinylon chloride

Kevlar braided

 Stainless steel braided

Front fork

Showa 43mm

Kayaba 46mm

Kayaba 46mm

 .45kg/mm Eibach Springs, 2.5wt Golden Spectro SPL Fluid, 3.4mm ported compression piston, stiffer shim stack. 

 

 SuperBrace Fork Brace

 

 

Front fork cartridge diameter

20 mm

25 mm

Front fork underhang 

116 mm

75 mm

Front fork adjustment

Preload, compression

Compression and rebound damping

Shock/stroke

Showa/83mm

Kayaba/110mm

Increased travel 125mm CR500 shock body with Gold Valve,    3wt shock fluid, 200psi nitrogen, heavier shim stack.

Upper shock bearing

Helical 

Needle

Exhaust head-pipe material

Steel

Stainless-steel

 Stainless-steel Moriwaki Full Exhaust - Ceramic coated

Radiator core size 

None 

105 x 285 x 24 mm

 105mm x 285mm x 39mm  IMS Fluidynes

Fuel tank capacity 

2.7 gallons

2.6 gallons

 4.3gal. Clarke

Shift lever

Steel

Aluminum

 Aluminum Brake away  

Rear brake pedal 

Steel 

Aluminum

 Aluminum

Throttle effort 

10.0 kg/cm

7.8 kg/cm

22 percent less effort

Clutch effort

6.4 kg 

5.8 kg

2.5  kg

Warranty period

6 months

6 months

 

Engine guard

Aluminum tube

1-piece high-impact plastic

 Aluminum Bash plate

Cylinder

Steel liner

Nikasil

Steel sleeve

Case screws 

5mm Allen

8mm hex-head

8mm hex-head

Removable subframe 

No 

Yes 

Yes, Straightened!

Decompression lever 

Separate 

Integrated on top of clutch lever

 Under front brake perch.

Rake/trail 

27.0 degrees/ 105mm 

27.8 degrees/ 111mm

 27.0 degrees/ 111mm

Wheelbase 

57.3 inches

58.3 inches

 58 inches

Engine weight

98 pounds

88 pounds

 90 pounds

Rear Wheel Horsepower:      XR600R  41hp             XR628R Cam, Tricked out 47hp     

XR650R (Un-Corked) 44hp       Stock XR650R Modified 48hp        XR680R  Tricked out 58hp

 

 Click on this Picture

 

Model:

BWB XR680R

 

Year:

2003

 

Category:

Baja / off-road

 

 Engine and transmission

 

Displacement:

680.00 ccm (41.25 cubic inches)

 

Engine type:

Single cylinder

 

Stroke:

4

 

Compression:

11:1

 

Bore x stroke:

102.4 x 82.6 mm (4.03 x 3.3 inches)

 

Fuel system:

Carburetor   Edelbrock 41mm

 

Valves per cylinder:

4

 

Fuel control:

SOHC

 

Cooling system:

Liquid

 

Gearbox:

5-speed

 

Transmission type
final drive:

Chain

 

Ignition:

Solid-state CD with electronic advance

 

Physical measures

 

Dry weight:

122.6 kg (287 pounds) Fuel Full and ready to ride 323 pounds

 

Seat height:

935 mm (36.8 inches) If adjustable, lowest setting.

 

Wheelbase:

1,481 mm (58.3 inches)

 

Ground clearance:

335 mm (13.0 inches)

 

Chassis and dimensions

 

Rake (fork angle):

27.0°

Trail:

111 mm (4.4 inches)

 

Front suspension:

46mm leading-axle Kayaba cartridge fork with compression- and rebound-damping adjustability with .45kg/mm Eibach Springs

 

Front suspension travel:

284 mm (11.2 inches)

 

Rear suspension:

Pro-Link Kayaba single-shock with spring-preload, compression- and rebound-damping adjustability 10kg/mm Eibach Spring, Gold Valve

 

Rear suspension travel:

307 mm (12.1 inches)

 

Front tire dimensions:

90/80-21

 

Rear tire dimensions:

140/80-18 IRC M5B

 

Front brakes:

Single disc

 

Front brakes diameter:

280 mm (9.4 inches)

 

Rear brakes:

Single disc

 

Rear brakes diameter:

240 mm (9.4 inches)

 

Speed and acceleration

Top speed 

14/48 103.7mph  15/49 109mph 15/47 114.3 @ max rpm of 8,200 with IRC M5B

HP/Torque

72bhp @ Engine, 58hp @ rear wheel  @ 7,200rpm / Torque 52 ftp @ Engine, 47ftp @ rear wheel @ 6,100rpm

 

Other specifications

 

Fuel capacity:

4.4 gallons

 

Color options:

Red/Black

 

Comments:

Model ID:  XR680R

   680cc Wiseco 11:1 piston, Barnum's Pro cam, Carrillo Rod, Kimberwhite valve springs & S/S valves w/ 3mm over sized intake, Clarke 4.3 tank, Edelbrock bored to 42mm X 40mm, 19 needle 16 clicks out, pump screw full on, Moriwaki Full Exhaust w/ black ceramic coating, UNI air filter, Holes in air filter cover, No back fire screen, Baja Designs Sol-Tek 100watt Baja light, Shark Fin, Galfer Steel Braided Brake Lines (red) and brake pads, Titex rear rotor, Scott's steering dampener, Applied triple clamp, SuperBrace fork brace, Renthal RC Fatty Bars, Oil sight tube, Acerbis; Pro-Hand guards, LED Tail Light, Fender w/ fender brace & front rotor cover, XR's Only's, Chain Guard, case saver & skid plate, IMS Fluidyne Radiators & Pro foot pegs, Spyder Grips, Ceet seat cover, LED tail/brake light, Re-wound duel stage stator & stator case vent tube, 49or47 Iron Man sprocket, X-ring EVR2 Gold chain, Gold Excel rims, Red Rad hubs and Heavy Duty Spokes, 115 NAPA Thermostat, Evens Coolant, Eibach 45kg Fork springs w/re-shimmed & Re-valve, legnthened 20mm, 110mm 2.5wt ultra light Golden Spectro SPL Fork Fluid, Eibach 10kg shock springs on a CR500 shock with Gold valve, (90mm preload) 200psi nitrogen, US-1 RaceTech shock oil, re-shimmed & Outerwears Shock Sock, 15/47 IronMan Sprockets, EBC 280mm front rotor, fork skins.