1987 Yamaha Sleds:
Models Exciter EX570L XL-V XL540L SR-V SR540L V-Max VMX540L Phaser EL PZ480EL Phaser PZ480L Enticer Trapper Rev ET340TRL Enticer Trapper ET340TL Enticer ET340L Excel III EC340L Inviter CF300L Bravo Trapper BR250TL Bravo Transporter BR250TSL Bravo BR250L
Engine (cyl) 569 (2) 535 (2) 535 (2) 535(2) 485(2) 485(2) 337(2) 337(2) 337(2) 337(2) 292 (1) 246 (1) 246 (1) 246 (1)
Carb Type Mikuni B44-36 Mikuni B38-32 Keihn BD44-38 Mikuni  VM38x 2 Mikuni  BM38-32x 2 Mikuni  BM38-32x 2 Mikuni B38-32x 2 Mikuni B38-32x 2 Mikuni B38-32x 2 Mikuni B38-32x 2 Keihn BD38-32 Keihn BD32-28 Keihn BD32-28 Keihn BD32-28
Main Jet 138.8 132.5 150 290 143.8 143.8 132.5 132.5 135 135 108 105 105 105
Clip Position       4                    
Pilot Jet 105 60 92 40 95 95 95 95 100 100 95 78 78 78
Float Height (mm) 12+/- 2 12+/- 2 15+/- 2 18.1+/-1 12+/- 1 12+/- 1 15+/- 1 15+/- 1 15+/- 1 15+/- 1 15+/- 2 15+/- 2 15+/- 2 15+/- 2
Fuel Screws  5/8 1 1/2 2     1/2 1 1/2 1 1/2 1    1     7/8  7/8 1 1/8 1 1/4 1 1/4 1 1/4
Pilot Air Jet 0.8 0.8 100   0.5 0.5 0.7 0.7 0.7 0.7 1 100 100 100
Idle RPM 1500 +/- 100 1200 +/- 100 1500 +/- 100 1500 +/- 100 1600 +/- 100 1600 +/- 100 1600 +/- 100 1600 +/- 100 1700 +/- 100 1700 +/- 100 1100 +/- 100 1100 +/- 100 1100 +/- 100 1100 +/- 100
Drive                            
Engagement RPM 3400 3400 3400 4000 3200 3200 3100 3200 3000 3000 3000 3200 2900 3100
Shift RPM 7250 6900 7200 8200 6850 6850 6500 6500 6500 6500 5750 5900 5700 5700
Belt Type                            
Sheave Ctr to Ctr 268.5mm 268.5mm 268.5 mm 305 268.5 mm 268.5 mm 266 mm 266 mm 266 mm 266 mm 266 mm 266 mm 266 mm 266 mm
Sheave Offset 11 mm 11 mm 11 mm 11 mm  11 mm  11 mm  11 mm 11 mm 11 mm 11 mm 15 mm 11 mm 11 mm 11 mm
Clutch Weights (rivets)                            
Roller Type                            
Primary Spring Wh-Purp Wh-Purp Gold-Wh Wh-Yell Blue-Green Blue-Green Gold Red Red Red Gold-Brown Gold-Pink None None
Secondary Spring Pink Pink Pink Pink Yell-Blue Yell-Blue Gold Gold None None None None None None
Secondary Setting  A-2 (50) A-2 (50) B-1 (30) C-2 (40) B-1 (60) B-1 (60) 192 192 160 160 160 160 160 160
Helix Angle                            
Gearing  18/31 17/29 17/31 18/33 17/29 17/29 14/33 12/23 13/22 13/22 12/19 10/24 12/23 13/22
Chain