| 1991 Yamaha Sleds: | ||||||||||||||||||||||
| Models | Exciter II LE EX570ER-R | Exciter II LE EX570ER-B | Exciter II EX570R | SR-V SR540R | V-Max VMX540R | Viking VK540ER | Venture VT480R | Phaser II ST PZ480STR | Phaser II PZ480ER-W | Phaser II PZ480ER-L | Phaser II PZ480R | Enticer Rev ET400TRR | Enticer ET400TR | Ovation CS340EPR-R | Ovation CS340ER-B | Bravo Trapper BR250TR | Bravo Transporter BR250TSR | Bravo BR250R | Snow Sport SV125ER | |||
| Engine (cyl) | 569 (2) | 569 (2) | 569 (2) | 535 (2) | 535(2) | 535 (2) | 485(2) | 485(2) | 485(2) | 485(2) | 485(2) | 408(2) | 408(2) | 337(2) | 337(2) | 246 (1) | 246 (1) | 246 (1) | 123 | |||
| Carb Type | Mikuni VM38 | Mikuni VM38 | Mikuni VM38 | Keihn BD44-38 | Mikuni VM38x 2 | Mikuni B38-34 | Mikuni BM38-32x 2 | Mikuni BM38-32x 2 | Mikuni BM38-32x 2 | Mikuni BM38-32x 2 | Mikuni BM38-32x 2 | Mikuni B38-32x 2 | Mikuni B38-32x 2 | Teikei Y26W-2x 2 | Teikei Y26W-2x 2 | Keihn BD32-28 | Keihn BD32-28 | Keihn BD32-28 | Mikuni B26-20 | |||
| Main Jet | 310 | 310 | 310 | 150 | 290 | 141.3 | 143.8 | 143.8 | 143.8 | 143.8 | 143.8 | 140 | 140 | 174 | 174 | 105 | 105 | 105 | 97.5 | |||
| Clip Position | 4 | |||||||||||||||||||||
| Pilot Jet | 42.5 | 42.5 | 42.5 | 92 | 40 | 90 | 95 | 95 | 95 | 95 | 95 | 80 | 80 | 76 | 76 | 78 | 78 | 78 | 55 | |||
| Float Height (mm) | 18.1+/-1 | 18.1+/-1 | 18.1+/-1 | 15+/- 2 | 18.1+/-1 | 12.7+/- 1 | 11.5+/- 2 | 11.5+/- 2 | 11.5+/- 2 | 11.5+/- 2 | 11.5+/- 2 | 12.7+/- 1 | 12.7+/- 1 | 31+/- 1 | 31+/- 1 | 15+/- 2 | 15+/- 2 | 15+/- 2 | 16.3+/- 1 | |||
| Fuel Screws | 5/8 | 5/8 | 5/8 | 2 | 1 | 1 1/4 | 1 1/2 | 1 1/2 | 1 1/2 | 1 1/2 | 1 1/2 | 1 1/2 | 1 1/2 | 1 1/2 | 1 1/2 | 1 1/4 | 1 1/4 | 1 1/4 | 1 1/2 | |||
| Pilot Air Jet | 100 | 0.8 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.7 | 0.7 | 1.1 | 1.1 | 100 | 100 | 100 | ||||||||
| Idle RPM | 1500 +/- 100 | 1500 +/- 100 | 1500 +/- 100 | 1500 +/- 100 | 1500 +/- 100 | 1200 +/- 100 | 1600 +/- 100 | 1600 +/- 100 | 1600 +/- 100 | 1600 +/- 100 | 1600 +/- 100 | 1700 +/- 100 | 1700 +/- 100 | 1800 +/- 100 | 1800 +/- 100 | 1100 +/- 100 | 1100 +/- 100 | 1100 +/- 100 | 2100 +/- 100 | |||
| Drive | ||||||||||||||||||||||
| Engagement RPM | 3800 | 3800 | 3800 | 3400 | 4000 | 2700 | 3400 | 3500 | 3500 | 3500 | 3500 | 3200 | 3100 | 3500 | 3500 | 3200 | 2900 | 3100 | 3500 | |||
| Shift RPM | 7300 | 7300 | 7300 | 7200 | 8200 | 6900 | 6850 | 6850 | 6850 | 6850 | 6850 | 6500 | 6500 | 6600 | 6600 | 5900 | 5700 | 5700 | 7000 | |||
| Belt Type | ||||||||||||||||||||||
| Sheave Ctr to Ctr | 268.5mm | 268.5mm | 268.5mm | 268.5 mm | 305 | 268.5 mm | 268.5 mm | 268.5 mm | 268.5 mm | 268.5 mm | 268.5 mm | 266 mm | 266 mm | 268.5 mm | 268.5 mm | 266 mm | 266 mm | 266 mm | ||||
| Sheave Offset | 16 mm | 16 mm | 16 mm | 11 mm | 11 mm | 11 mm | 11 mm | 11 mm | 11 mm | 11 mm | 11 mm | 11 mm | 11 mm | 11 mm | 11 mm | 11 mm | 11 mm | 11 mm | ||||
| Clutch Weights (rivets) | ||||||||||||||||||||||
| Roller Type | ||||||||||||||||||||||
| Primary Spring | W-Y-W | W-Y-W | W-Y-W | Gold-Wh | Wh-Yell | None | Green-Green | Green-Yell | Green-Yell | Green-Yell | Green-Yell | White-Violet | Blue Green | Gold | Gold | Gold-Pink | None | None | ||||
| Secondary Spring | Pink | White | White | Pink | Pink | White | Pink | Green-Yell | Green-Yell | Green-Yell | Green-Yell | Gold | None | Red | Red | None | None | None | ||||
| Secondary Setting | A-2 (50) | A-2 (50) | A-2 (50) | B-1 (30) | C-2 (40) | 50 (A-2) | A-2 (50) | C-2 (75) | C-2 (75) | C-2 (75) | C-2 (75) | 192 | 160 | 120 | 120 | 160 | 160 | 160 | ||||
| Helix Angle | ||||||||||||||||||||||
| Gearing | 18/33 | 18/33 | 18/33 | 17/31 | 18/33 | 17/39 | 19/33 | 17/29 | 17/29 | 17/29 | 17/29 | 14/31 | 12/23 | 12/22 | 12/22 | 10/24 | 12/23 | 13/22 | 14/43X 21/29 | |||
| Chain | ||||||||||||||||||||||