Useful Data

Details: Category: Owner's Handbook; 19.Feb; Hits: 3000

ENGINE

	Viper.	Venom and MSS.
Bore	72 mm. 2.8347-in.	86 mm. 3.385-in.
Stroke	86 mm. 3.385-in.	86 mm. 3.385-in.
Capacity(swept vol.)	349 c.c. 21.29 c. in.	499 c.c. 30.45 c. in.
Rated Horse-power (A.C.U. Rating)	3.5	5
†Running tappet clearances:	.005-in.	.005 -in.

Engine serial number and prefix stamped on left hand side of crankcase just below cylinder base flange. See page 34.

GEARBOXES

Overall ratios with standard driving sprocket on gearbox : *

	Viper	Venom	MSS
1st	12.6 to 1	11.2 to 1	12.4 to 1
2nd	8.73 to 1	7.74 to 1	8.57 to 1
3rd	6.64 to 1	5.88 to 1	6.52 to 1
Top	5.5 to 1	4.87 to 1	4.87 to 1

Gearbox serial prefix and number stamped on top of housing on right hand side.

TANK CAPACITIES

Fuel	3 Imperial Gallons; 13.6 litres; or 3.6 U.S. Gallons
Oil	½ Imperial Gallon; 2.27 litres; or 0.6 U.S. Gallons

TRANSMISSION

	Viper	Venom and MSS
Engine Sprocket	21T	23T
Clutch Sprocket	44T	44T
Gearbox Sprocket	21T	18T*
Rear Wheel Sprocket	55T	46T
Primary Chain	.5 x .305-in. 67 P Roller dia. .335-in.	.5 x .305-in. 68 P * Roller dia. .335-in.
Rear Chain	.5 x .305-in. 124 P Roller dia. .335-in.	.625 x 380-in. 101 P Roller dia. .335-in.

WHEELS & TYRES

	Viper	Venom	MSS
Front Rim	WM2 x 19	WM2 x 19	WM2 x 19
Rear Rim	WM2 x 19	WM2 x 19	WM2 x 19
Front Tyre	3.25 x 19-in Rib	3.25 x 19-in Rib	3.25 x 19-in Stud
Rear Tyre	3.25 x 19-in Stud	3.25 x 19-in Stud	3.25 x 19-in Stud

FRAME

Serial number and prefix stamped on right-hand side of front seat lug

†These are running clearance set cold. Different clearances must be employed for checking valve timing. See page 40 before checking or adjusting.

Always quote the engine serial number and prefix on all orders for spare parts and in any correspondence with the factory.

*A smaller sprocket and shorter chain are used if a sidecar is fitted.