2019 Yamaha Sleds: 
Models Sidewinder SRX LE Sidewinder LTX LE Sidewinder LTX SE & DX Sidewinder XTX SE  & LE 141 Sidewinder BTX LE 153 Sidewinder MTX 162 LE SR Viper LTX VK540F SRX 120R Snoscoot ES
Engine (cyl) 998 (3) 998 (3) 998 (3) 998 (3) 998 (3) 998 (3) 1049 (3) 535 (2) 123 (1) 192 (1)
Carburetor                    
Type EFI EFI EFI EFI EFI EFI Mikuni EFI 41 EIDW TM33-79 Flat Slides Mikuni BV18-11-84Z1 Mikuni
Main Jet N/A N/A N/A N/A N/A N/A NA NA 77.5 100
Clip Position N/A N/A N/A N/A N/A N/A NA NA NA NA
Pilot Jet N/A N/A N/A N/A N/A N/A NA 1 37.5 37.5
Float Height (mm) N/A N/A N/A N/A N/A N/A NA 14.4mm 16 N/A
Fuel Screws N/A N/A N/A N/A N/A N/A NA NA 1 N/A
Pilot Air Jet N/A N/A N/A N/A N/A N/A NA #65 120 N/A
Idle RPM 1450-1550 1450-1550 1450-1550 1450-1550 1450-1550 1450-1550 1450-1550 1250-1450 1050 +/- 100 N/A
Drive                    
Engagement RPM 3100 3100 3100 3100 3100 4100 3800 2700 NA NA
Shift RPM 8750 8750 8750 8750 8750 8750 8750 6500 NA NA
Belt Type 8JP 8JP 8JP 8JP 8JP 8JP 8JP 8DN NA NA
Sheave Ctr to Ctr 262-266 mm 262-266 mm 262-266 mm 262-266 mm 262-266 mm 262-266 mm 262-266 mm 267-270 mm NA NA
Sheave Offset 58.1-61.1mm 58.1-61.1mm 58.1-61.1mm 58.1-61.1mm 58.1-61.1mm 58.1-61.1mm 13.5-16.5mm 14.5-17.5 mm NA NA
Clutch Weights (rivets) 8LR00 / 13.3 Alum w/hole outer, 17.2 ctr & inner 8LR00 / 13.3 Alum w/hole outer, 17.2 ctr & inner 8LR00 / 13.3 Alum w/hole outer, 17.2 ctr & inner 8LR00 / 13.3 Alum w/hole outer, 17.2 ctr & inner 8LR00 / 13.3 Alum w/hole outer, 17.2 ctr & inner 8KC00/ AL 10.3 outer, 17.2 ctr, 17.2 inner 8GL00/ 13.3 outer & 13.9 center/inner 8AT10/17.2 mm outer NA NA
Roller Type 14.5mm 14.5mm 14.5mm 14.5mm 14.5mm 14.5mm 15.6mm 14.5 NA 18/Blue
Primary Spring G-R-G G-R-G G-R-G G-R-G G-R-G S-O-S B-S-B G-B-G NA NA
Secondary Spring Pink Pink Pink Pink Pink Yellow Pink Brown NA NA
Secondary Setting  60 60 60 60 60 60 70 50 deg NA NA
Helix Angle 35-39 35-39 35-39 35-39 35-39 35 deg 43 deg 37 deg NA NA
Gearing  21/41 24/50 21/41 21/41 24/50 21/52 24/50 18/38 NA 22/65
Chain 86L 92L 86L 86L 92L 98L 92L 70L NA NA