2008 Yamaha Sleds: 
Models APEX RTX APEX GT & GT 40th Apex LTX, LTX GT, LTXGT 40th APEX MTX/MTXSE & MTXSE 40TH FX NYTRO, RTX, RTRX, RTX 40TH FX NYTRO, MTX, MTRX, MTX 40TH RS Vector,GT, GT 40TH RS VECTOR LTX,LTX GT RS Venture & GT RS Venture TF Venture Lite Venture MP Phazer MTN Lite Phazer, RTX Phazer GT RS Viking Professional VK540III Venture XL Bravo LT
Engine (cyl) 998 (4) 998 (4) 998 (4) 998 (4) 1049 (3) 1049 (3) 973 (3) 973 (3) 973 (3) 973 (3) 499 (2) 499 (2) 499 (2) 499 (2) 499 (2) 973 (3) 535 (2) 485(2) 246 (2)
Carburetor                                      
Type Mikuni FI 39x4 Mikuni FI 39x4 Mikuni FI 39x4 Mikuni FI 39x4 Mikuni EFI 41 EIDW Mikuni EFI 41 EIDW Keihin CVK 40x3 Keihin CVK 40x3 Keihin CVK 40x3 Keihin CVK 40x3 Keihin EFI 43EIDW Keihin EFI 43EIDW Keihin EFI 43EIDW Keihin EFI 43EIDW Keihin EFI 43EIDW Keihin CVK 40x3 Mikuni B38-34 Mikuni B38-32x 2 Keihin BD32-28
Main Jet N/A N/A N/A N/A NA NA 148 148 148 148 N/A N/A N/A N/A N/A 148 141.3 1-143.8, 2-142.5 105
Clip Position N/A N/A N/A N/A NA NA NA NA NA NA N/A N/A N/A N/A N/A NA na n/a na
Pilot Jet N/A N/A N/A N/A NA NA 45 45 45 45 N/A N/A N/A N/A N/A 45 90 70 78
Float Height (mm) N/A N/A N/A N/A NA NA 16 16 16 16 N/A N/A N/A N/A N/A 16 14+/- 2 11.5+/- 2 15+/- 2
Fuel Screws N/A N/A N/A N/A NA NA 2 2 2 2 N/A N/A N/A N/A N/A 2 1 1/4 1 1 1/4
Pilot Air Jet N/A N/A N/A N/A NA NA 120 120 120 120 N/A N/A N/A N/A N/A 120 0.8 0.8 100
Idle RPM 1500 +/- 100 1500 +/- 100 1500 +/- 100 1500 +/- 100 1450-1550 1450-1550 1400 +/- 100 1400 +/- 100 1400 +/- 100 1400 +/- 100 1700 +/- 200 1700 +/- 200 1700 +/- 200 1700 +/- 200 1700 +/- 200 1400 +/- 100 1200 +/- 100 1300 +/- 100 1300 +/- 100
Drive                                      
Engagement RPM 3500 3500 3500 3500 3750 3750 3500 3600 3200 3000 3500 3100 4300 3900 3900 2400 2600 3700 3200
Shift RPM 10500 10500 10500 10500 8750 8750 8500 8500 8500 8500 11300 11300 11300 11300 11300 8500 6700 7250 5900
Belt Type 8DN 8DN 8DN 8DN 8DN 8DN 8DN 8DN 8DN 8DN 8GS 8GS 8GS 8GS 8GS 8DN 87X 89L 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 15 mm 15 mm 15 mm 15 mm 13.5-16.5mm 13.5-16.5mm 15 mm  15 mm 15 mm  15 mm  15mm 15mm 15mm 15mm 15mm 15 mm  16 mm 20 mm 11 mm
Clutch Weights (rivets) 8FP00 w/17.2 all holes 8FP00 w/17.2 all holes 8FP00 w/17.2 all holes 8FS00 w/13.3 (HOLE) outer and center only 8GL00/10.3 outer & 17.2 center/inner 8FS00/none 8es/13.9 & 13.9 8es/17.2 & 13.9 8es/13.9 & 17.2 8fa/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 8dj  w/13.3 & 17.2 8V8
Roller Type 14.5mm 14.5mm 14.5mm 15.6mm 15.6mm 16.5mm 15.6mm 15.6mm 15mm 14.5 14.5mm 14.5mm 15mm 15.6mm 15.6mm 15.6 15.6mm 15.6mm 14mm
Primary Spring Y-S-Y Y-S-Y Y-S-Y Y-P-Y Y-S-Y G-W-G Y-S-Y B-G-B W-S-W Y-G-Y Y-B-Y B-G-B G-Y-G P-B-P P-B-P W-B-W S-B-S PINK Gold-Pink
Secondary Spring Pink Pink White White Pink Pink Pink Pink Pink White Blue Blue Red Red Red Pink White Red None
Secondary Setting  70deg 70deg 60deg 70deg 80 70 60 deg 60 deg 60 deg 70 deg 50 deg 50 deg 55 deg 45 deg 45 deg 60 deg 40 deg 80 deg 160deg
Helix Angle 51/43 deg 51/43 deg 51/43 deg 45 deg 43 deg 39 deg 43 deg 43 deg 41 deg 39 deg 37 deg 37 deg 37 deg 39 deg 39 deg 39 deg 37 deg 43 deg 48.5 deg
Gearing  22/38 24/38 23/38 20/40 21/39 20/40 22/38 22/39 22/39 20/39 19/45 18/45 17/41 18/41 20/41 20/39 17/39 21/39 10/24
Chain 68L 70L 70L 68L 68L 68L 68L 70L 70L 68L 82L 82L 80L 80L 80L 68L 70L 68L 44L