The 1991 Superbike World Championship was the fourth FIM Superbike World Championship season. The season started on 1 April at Donington Park and finished on 19 October at Phillip Island after 13 rounds.

Doug Polen won the riders' championship with 17 victories and Ducati won the manufacturers' championship.

The third round of the championship at Mosport was boycotted by the regular riders on safety grounds.^[1]

1991 calendar[2]
Round		Circuit	Date	Pole position	Fastest lap	Winning rider	Winning team
1	R1	Donington	1 April	Doug Polen	Stéphane Mertens	Doug Polen	Team Fast by Ferracci
	R2				Doug Polen	Stéphane Mertens	Total Wanty Mertens Racing
2	R1	Jarama	28 April	Doug Polen	Doug Polen	Doug Polen	Team Fast by Ferracci
	R2				Doug Polen	Doug Polen	Team Fast by Ferracci
3	R1	Mosport	2 June	Tom Kipp	Pascal Picotte	Pascal Picotte	Fast Yamaha/Sunoco
	R2				Rueben McMurter	Tom Kipp	Wiseco Piston
4	R1	Brainerd	9 June	Stéphane Mertens	Doug Polen	Doug Polen	Team Fast by Ferracci
	R2				Stéphane Mertens	Doug Polen	Team Fast by Ferracci
5	R1	Österreichring	30 June	Doug Polen	Doug Polen	Stéphane Mertens	Total Wanty Mertens Racing
	R2				Doug Polen	Doug Polen	Team Fast by Ferracci
6	R1	Misano	4 August	Doug Polen	Rob Phillis	Doug Polen	Team Fast by Ferracci
	R2				Raymond Roche	Doug Polen	Team Fast by Ferracci
7	R1	Anderstorp	11 August	Doug Polen	Stéphane Mertens	Doug Polen	Team Fast by Ferracci
	R2				Raymond Roche	Doug Polen	Team Fast by Ferracci
8	R1	Sugo	25 August	Doug Polen	Doug Polen	Doug Polen	Team Fast by Ferracci
	R2				Doug Polen	Doug Polen	Team Fast by Ferracci
9	R1	Shah Alam	1 September	Doug Polen	Doug Polen	Raymond Roche	Squadra Corse Ducati Lucchinelli
	R2				Raymond Roche	Raymond Roche	Squadra Corse Ducati Lucchinelli
10	R1	Hockenheim	15 September	Doug Polen	Raymond Roche	Doug Polen	Team Fast by Ferracci
	R2				Doug Polen	Raymond Roche	Squadra Corse Ducati Lucchinelli
11	R1	Magny-Cours	29 September	Rob Phillis	Doug Polen	Doug Polen	Team Fast by Ferracci
	R2				Doug Polen	Doug Polen	Team Fast by Ferracci
12	R1	Mugello	6 October	Doug Polen	Doug Polen	Doug Polen	Team Fast by Ferracci
	R2				Giancarlo Falappa	Raymond Roche	Squadra Corse Ducati Lucchinelli
13	R1	Phillip Island	19 October	Doug Polen	Aaron Slight	Kevin Magee	Peter Jackson Yamaha Racing
	R2				Aaron Slight	Doug Polen	Team Fast by Ferracci

Championship standings

In each race, points were awarded as follows:

Riders' standings

1991 final riders' standings[3] Pos. Rider Bike GBR SPA CAN USA AUT SMR SWE JPN MAL GER FRA ITA AUS Pts R1 R2 R1 R2 R1 R2 R1 R2 R1 R2 R1 R2 R1 R2 R1 R2 R1 R2 R1 R2 R1 R2 R1 R2 R1 R2 1 Doug Polen Ducati 1 Ret 1 1 1 1 2 1 1 1 1 1 1 1 4 5 1 2 1 1 1 2 2 1 432 2 Raymond Roche Ducati Ret 2 Ret 3 DNS DNS 3 3 4 2 Ret 3 6 2 1 1 2 1 2 2 2 1 282 3 Rob Phillis Kawasaki 4 3 2 Ret 4 5 4 4 2 3 2 2 2 Ret 5 Ret 4 4 4 5 DNS DNS 4 3 267 4 Stéphane Mertens Ducati Ret 1 Ret 2 3 3 1 2 6 Ret Ret Ret Ret Ret 9 2 5 6 7 3 4 Ret 5 6 217 5 Fabrizio Pirovano Yamaha 3 8 5 5 5 6 Ret 5 5 4 3 Ret 7 7 2 3 Ret 7 Ret 6 Ret 6 195 6 Terry Rymer Yamaha 2 4 7 Ret DNS DNS 6 9 8 9 7 12 Ret 14 10 Ret 7 9 5 4 3 3 162 7 Carl Fogarty Honda Ret 9 9 8 11 11 7 8 4 4 11 8 8 7 9 10 6 7 7 Ret 146 8 Fred Merkel Honda Ret Ret Ret Ret 6 4 8 8 9 7 8 6 12 9 12 9 Ret Ret 3 10 8 Ret 124 9 Giancarlo Falappa Ducati 14 Ret Ret Ret 7 Ret Ret 7 10 6 6 13 10 11 6 Ret 6 3 Ret 8 6 Ret 113 10 Davide Tardozzi Ducati 5 6 3 5 9 10 3 6 3 8 DNS DNS 108 11 Udo Mark Yamaha 8 7 7 10 11 Ret 10 10 18 Ret 8 5 68 12 Jeffrey de Vries Yamaha 9 10 15 Ret 10 10 11 12 16 16 12 Ret Ret 24 13 13 13 Ret 12 14 15 5 Ret Ret 66 13 Aaron Slight Kawasaki 3 4 7 4 3 Ret 65 14 Kevin Magee Yamaha 5 3 1 2 63 15 Jari Suhonen Yamaha DNS DNS Ret 9 9 11 Ret 15 5 7 Ret 17 14 12 9 12 17 12 61 16 Juan López Mella Honda 11 11 3 4 14 DNS 17 Ret Ret 11 Ret Ret 17 18 14 10 DNQ DNQ 16 18 13 15 57 17 Scott Russell Kawasaki 2 2 8 5 53 18 Daniel Amatriain Honda Ret 13 4 6 12 17 13 13 14 11 DNS DNS 15 21 20 13 47 19 Edwin Weibel Honda 13 14 Ret Ret 41 Ducati 18 Ret 10 11 14 9 9 7 20 Jean-Yves Mounier Yamaha DNS DNS 13 9 10 14 20 17 9 9 21 20 18 12 11 Ret DNS DNS 41 21 Rob McElnea Yamaha 5 5 11 8 Ret 16 35 22 Brian Morrison Yamaha 6 6 8 11 18 Ret 33 23 Niall Mackenzie Honda 7 7 Ret DNS 15 12 33 Yamaha Ret 6 24 Linnley Clarke Yamaha 4 2 30 25 Yves Brisson Honda 2 4 30 26 Baldassarre Monti Honda Ret Ret 6 Ret 8 7 DNS DNS DNS DNS 27 27 Steve Crevier Kawasaki 3 5 26 28 Malcolm Campbell Honda 19 21 6 4 23 29 Rueben McMurter Honda Ret 3 12 13 22 30 Scott Doohan Yamaha 17 14 7 5 22 31 Massimo Broccoli Kawasaki 21 14 DNQ DNQ 12 12 22 Ret 10 11 21 32 Tom Kipp Yamaha Ret 1 Ret Ret 22 22 20 33 Pascal Picotte Yamaha 1 Ret 20 34 Benoît Pilon Yamaha 6 6 20 35 Piergiorgio Bontempi Kawasaki NC Ret 16 Ret DNQ DNQ 11 DNS Ret 4 18 36 Steve Martin Suzuki 8 7 17 37 John Hopperstad Yamaha 8 7 18 DNS 17 38 Peter Rubatto Yamaha Ret 16 12 Ret 15 13 13 DNS Ret 13 23 DNS Ret 13 17 39 Jacques Guenette Kawasaki 9 8 15 40 Michael O'Connor Honda 10 8 14 Pos. Rider Bike GBR SPA CAN USA AUT SMR SWE JPN MAL GER FRA ITA AUS Pts

Colour Result Gold Winner Silver Second place Bronze Third place Green Points finish Blue Non-points finish Non-classified finish (NC) Purple Retired (Ret) Red Did not qualify (DNQ) Did not pre-qualify (DNPQ) Black Disqualified (DSQ) White Did not start (DNS) Withdrew (WD) Race cancelled (C) Blank Did not practice (DNP) Did not arrive (DNA) Excluded (EX) Bold – Pole position Italics – Fastest lap

Manufacturers' standings

1991 final manufacturers' standings[4]
Pos.	Manufacturer	GBR		SPA		CAN		USA		AUT		SMR		SWE		JPN		MAL		GER		FRA		ITA		AUS		Pts
		R1	R2	R1	R2	R1	R2	R1	R2	R1	R2	R1	R2	R1	R2	R1	R2	R1	R2	R1	R2	R1	R2	R1	R2	R1	R2
1	Ducati	1	1	1	1	7	13	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	2	1	489
2	Yamaha	2	4	5	5	1	1	5	6	6	5	5	4	3	5	4	3	2	3	7	5	5	4	3	3	1	2	355
3	Kawasaki	3	4	2	14	3	5	2	2	4	4	2	3	2	2	2	4	5	4	4	4	4	5	11	4	3	3	351
4	Honda	7	7	3	4	2	3	6	4	8	8	7	7	4	4	11	8	8	7	9	10	3	7	7	11	6	4	265
5	Suzuki					11	11	20	15	Ret	Ret			21	Ret	15	15	21	Ret	DNQ	DNQ					8	7	30
6	Bimota	15	20	Ret	13					Ret	15	14	10							DNS	DNS							13
Pos.	Manufacturer	GBR		SPA		CAN		USA		AUT		SMR		SWE		JPN		MAL		GER		FRA		ITA		AUS		Pts