Online Catalogue

KTM 660 Rallye

2000 to 2002

Front Sprocket

Steel Front Sprocket

Part Number: JTF1902

Teeth: –

Available Sizes: 12, 13, 14, 15, 16, 17

OE Type Rubber Cushioned Front Sprocket

Part Number: JTF1902RB

Teeth: –

Available Sizes: 15, 16, 17

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR897

Teeth: –

Available Sizes: 38, 40, 41, 42, 43, 44, 45, 46, 47, 53

Lightweight Self-Cleaning Rear Sprocket

Part Number: JTR897SC

Teeth: –

Available Sizes: 40, 42, 43, 45, 46, 47, 48, 49, 50, 51, 52

Heat-Induction Hardened Zinc Black Rear Sprocket

Part Number: JTR897ZBK

Teeth: –

Available Sizes: 40, 42, 45

Racelite Aluminium Rear Race Sprocket

Part Number: JTA897BLK

Teeth: –

Available Sizes: 38, 40, 41, 42, 45, 47, 48, 49, 50, 51, 52

Drive Chain

Pitch: 520

Length: –

Please note that the chain shown in this listing is for size reference only. For the correct chain type and grade, please refer to the vehicle's manufacturer manual.

Gear Ratio Chart

Teeth		Front Sprocket
Teeth		15	16	17
Rear Sprocket	40	2.67	2.50	2.35
	42	2.80	2.62	2.47
	43	2.87	2.69	2.53
	45	3.00	2.81	2.65
	46	3.07	2.88	2.71
	47	3.13	2.94	2.76
	48	3.20	3.00	2.82
	49	3.27	3.06	2.88
	50	3.33	3.12	2.94
	51	3.40	3.19	3.00
	52	3.47	3.25	3.06

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)