2011 Yamaha Sleds: 
Models APEX & SE APEX XTX FX NYTRO XTX FX NYTRO FX NYTRO RTX FX NYTRO MTX 153/162 SE RS Vector GT RS Vector LTX GT RS Venture RS Venture GT RS Venture TF Venture Lite Venture MP Phazer MTX Phazer, RTX Phazer GT RS Viking Professional VK540III Bravo LT
Engine (cyl) 998 (4) 998 (4) 1049 (3) 1049 (3) 1049 (3) 1049 (3) 973 (3) 973 (3) 973 (3) 973 (3) 973 (3) 499 (2) 499 (2) 499 (2) 499 (2) 499 (2) 973 (3) 535 (2) 246 (2)
Carburetor                                      
Type Mikuni EFI 39EIDWx2 Mikuni EFI 39EIDWx2 Mikuni EFI 41 EIDW Mikuni EFI 41 EIDW Mikuni EFI 41 EIDW Mikuni EFI 41 EIDW Mikuni EFI 41 EIDW Mikuni EFI 41 EIDW Keihin CVK 40x3 Mikuni EFI 41 EIDW Mikuni EFI 41 EIDW Keihin EFI 43EIDW Keihin EFI 43EIDW Keihin EFI 43EIDW Keihin EFI 43EIDW Keihin EFI 43EIDW Keihin CVK 40x3 Mikuni B38-34 Keihin BD32-28
Main Jet N/A N/A NA NA NA NA NA NA 148 NA NA N/A N/A N/A N/A N/A 148 141.3 105
Clip Position N/A N/A NA NA NA NA NA NA NA NA NA N/A N/A N/A N/A N/A NA na na
Pilot Jet N/A N/A NA NA NA NA NA NA 45 NA NA N/A N/A N/A N/A N/A 45 90 78
Float Height (mm) N/A N/A NA NA NA NA NA NA 16 NA NA N/A N/A N/A N/A N/A 16 14+/- 2 15+/- 2
Fuel Screws N/A N/A NA NA NA NA NA NA 2 NA NA N/A N/A N/A N/A N/A 2 1 1/4 1 1/4
Pilot Air Jet N/A N/A NA NA NA NA NA NA 120 NA NA N/A N/A N/A N/A N/A 120 0.8 100
Idle RPM 1500 +/- 100 1500 +/- 100 1450-1550 1450-1550 1450-1550 1450-1550 1450-1550 1450-1550 1400 +/- 100 1450-1550 1450-1550 1700 +/- 200 1700 +/- 200 1700 +/- 200 1700 +/- 200 1700 +/- 200 1400 +/- 100 1200 +/- 100 1300 +/- 100
Drive                                      
Engagement RPM 3400 3400 3750 3750 4100 3500 3300 3300 3200 3100 3100 3500 3100 4300 3900 3900 2400 2600 3200
Shift RPM 10500 10500 8750 8750 8750 8750 8250 8250 8500 8250 8250 11300 11300 11300 11300 11300 8500 6700 5900
Belt Type 8DN 8DN 8DN 8DN 8DN 8DN 8DN 8DN 8DN 8DN 8DN 8GS 8GS 8GS 8GS 8GS 8DN 87X 89X
Sheave Ctr to Ctr 268.5 mm 268.5 mm 268.5 mm 268.5 mm 268.5 mm 268.5 mm 268.5 mm 268.5 mm 268.5 mm 268.5 mm 268.5 mm 268.5 mm 268.5 mm 268.5 mm 268.5 mm 268.5 mm 268.5 mm 268.5 mm 266 mm
Sheave Offset 13.5-16.5mm 13.5-16.5mm 13.5-16.5mm 13.5-16.5mm 13.5-16.5mm 13.5-16.5mm 13.5-16.5mm 13.5-16.5mm 13.5-16.5mm 13.5-16.5mm 13.5-16.5mm 13.5-16.5mm 15mm 15mm 15mm 15mm 15 mm  16 mm 11 mm
Clutch Weights (rivets) 8HG00/ 17.2 w/hole outer, 17.2 ctr, 17.2 w/hole tip 8HG00/ 17.2 w/hole outer, 17.2 ctr, 17.2 w/hole tip 8GL00/ 17.2 outer/center & AL10.3 inner 8GL00/ 10.3 outer & 17.2 center/inner 8GL00/ 10.3 outer & 17.2 center/inner 8FS00/none 8FP00/ 17.2 w/hole outer & 13.3 center/inner 8FP00/ 17.2 w/hole outer & 13.3 center/inner 8es/13.9 & 17.2 8HF00/ 3-13.3 w/hole 8HF00/ 13.3 w/hole, 17.2, 17.2 8gc/17.2,17.2 & 13.9 8gc/17.2,17.2 & 17.2 8dn10/10.3 outer 8GC00/ 13.3,10.3,10.3 8GC00/ 13.3,10.3,10.3 8FN/17.2 & 17.2 8at-00 w/13.3 8V8
Roller Type 14.5mm 14.5mm 15.6mm 15.6mm 15.6mm 16.5mm 16.5mm 16.5mm 15mm 15.6mm 14.5mm 14.5mm 14.5mm 15mm 15.6mm 15.6mm 15.6 15.6mm 14mm
Primary Spring B-S-B B-S-B B-S-B Y-S-Y B-W-B G-W-G G-W-G W-W-W W-S-W P-P-P P-P-P Y-B-Y B-G-B G-Y-G P-B-P P-B-P W-B-W S-B-S Gold-Pink
Secondary Spring Pink Pink White Pink Pink White Pink Pink Pink Pink White Blue Blue Red Red Red Pink White None
Secondary Setting  70deg 70deg 70 80 70 60 70 deg 70 deg 60 deg 60 deg 70 deg 50 deg 50 deg 55 deg 45 deg 45 deg 60 deg 40 deg 160deg
Helix Angle 51/43 deg 51/43 deg 43 deg 43 deg 43 deg 39 deg 43 deg 43 deg 41 deg 41 deg 39 deg 37 deg 37 deg 37 deg 39 deg 39 deg 39 deg 37 deg 48.5 deg
Gearing  24/37 23/37 21/39 21/39 21/39 18/40 24/38 24/39 22/39 23/39 21/39 19/45 18/45 17/41 18/41 20/41 20/39 17/39 10/24
Chain 70L 68L 68L 68L 68L 68L 70L 70L 70L 70L 68L 82L 82L 80L 80L 80L 68L 70L 44L