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DS650 INFO

Specs (scroll down)

Spark Plug Info

Highly recommended parts:

Odyssey Battery PC545

Scotts Stainless Oil Filter

LED 1157 Tail Light Bulb

IMS 5 GALLON TANK INSTALLED

IMS 5 Gallon fuel tank

Front Sand Tire Comparison

22" Haulers vs 20" Edge paddles

Maxxis Razr 23" fronts 22" rears in 6 ply

 (You can see your ply rating by looking at the sidewall for stars  -  1 star=2 ply  2=4ply  3=6ply)

Barnett 9 disc clutch install

Stock Carb adjustment

Stock Rotax Specs:ECHNICAL DATA
Subsection 02 (ENGINE AND VEHICLE)
VMR2001_029_11_02A.FM 11-02-1
ENGINE AND VEHICLE
VEHICLE MODEL 7449
ENGINE
Engine Type BOMBARDIER-ROTAX 654,4 Stroke, Double Overhead Camshaft,
Bush Chain Drive, Liquid Cooled
Starting System Electric (start in any gear with clutch applied or on neutral)
Number of Cylinder(s) 1
Number of Valves 4 Bucket Tappet-Operated Valves
Decompressor Type Automatic
Bore Standard mm (in) 100 (3.94)
Stroke mm (in) 83 (3.27)
Displacement cm 3 (in 3 ) 652 (39.7)
Compression Ratio 9.7: 1
Calibration Engine Speed 100 RPM 13 + 1
Intake Valve Opening 17° BTDC
Intake Valve Closing 45° ABDC
Exhaust Valve Opening 47° BBDC
Exhaust Valve Closing 15° ATDC
Valve Clearance When Engine Cold
(maximum 35°C/95°F) Exhaust/Intake mm (in) 0.1 to 0.15 (0.004 to 0.006)
Valve Length Intake mm (in) 90.91 and 90.76 (3.579 and 3.573)
Exhaust mm (in) 90.65 and 90.05 (3.568 and 3.545)
Plate Diameter Intake mm (in) 36 (1.42)
Exhaust mm (in) 31 (1.22)
Shaft Diameter Intake mm (in) 5.95 (0.24)
Exhaust mm (in) 5.935 (0.23)
Valve Seat Angle Intake mm (in) 45°
Exhaust mm (in) 30°
Piston Ring End Gap
New Minimum mm (in) 0.2 (0.008)
New Maximum mm (in) 0.4 (0.016)
Wear Limit mm (in) 1 (0.04)
Ring/Piston Groove Clearance
New Minimum mm (in) 0.03 (0.0012)
New Maximum mm (in) 0.065 (0.0026)
Wear Limit mm (in) 0.15 (0.006)
Piston/Cylinder Clearance Wear Limit mm (in) 0.09 (0.004)
Cylinder
New Minimum mm (in) 100 (3.9371)
New Maximum mm (in) 100.012 (3.9376)
Wear Limit mm (in) 100.03 (3.9382)
Crankshaft Balance Factor % 47 ± 3
Crankshaft Deflection mm (in) 0.1 (0.004)
Connecting Rod Big End Axial Play Wear Limit mm (in) 0.8 (0.794)
Connecting Rod Small End I.D. Wear Limit mm (in) 22.04 (0.868)
Connecting Rod/Piston Pin Clearance Wear Limit mm (in) 0.06 (0.002)
Camshaft
(intake and exhaust)
Bearing Point Ø mm (in) 21.95 (0.864)
Cam Height mm (in) 39.7 (1.56)
Timing Chain
(gap from sealing face to piston of chain tensioner) mm (in) 9.5 (0.374)
Lubrication Dry Sump Lubrication by Oil Pump Replaceable Oil Filter
Oil Filter Main-Flow Type
Air Filter Type Cleanable Synthetic Panelette/Foam
Exhaust System Type Bombardier, Stainless Header Pipe Painted Steel Muffler
Spark Arrester USFS Approved