Engine Size Model/Year NGK Spark Plug Gap Battery Chain Front Sprocket Rear Sprocket Front Tire Rear Tire
Harley Davidson
50 M50/S 65-70 B8ES 0.02            
  Topper Motor Scooter 60-65 B7S 0.024            
65 M65/S 66-73 BP5ES 0.025            
65 MC65 66-73 BP5ES 0.025            
90 X90 Mini Cycle 73-75 BP5ES 0.025 12N7-3B       3.00-10 3.00-10
  Z90 73-75 BP5ES 0.025 12N7-3B       2.50-17 3.25-16
100 Baja100MSR 70-74 B8ES 0.02            
  SR100 73-74 B8ES 0.02         3.00-21 3.50-18
125 125 thru 47 B6S 0.024            
  Hummer                
  M125/ML7MLS/Rapido 68-74 BP5ES 0.025            
  SS125 74-77 B9ES 0.02 12N7-3B          
  SX125 74-77 B7ES 0.02 12N7-3B       3.00-19 3.50-18
  SXT125 75-78 B9ES 0.02 12N7-3B          
  TX125 73-78 B7ES 0.02 12N7-3B          
175 Pacer                
  Scat 47-66                
  SS175 75-78 B9ES 0.02 12N7-3B          
  SX175 74-78 B9ES 0.02 12N7-3B       3.00-19 3.50-18
250 Sprint C/H 61-66 B6ES 0.02            
  Sprint 67-68                
  MX250 75-78 B10EV 0.025            
  SS250 75-78 B8ES 0.02 12N7-3B          
  SX250 75-78 B9ES 0.02 12N7-3B       3.00-21 4.00-18
350 Sprint SS350 69-74 B8ES 0.025 Y60-N24L-A       3.25-19 4.00-18
  Sprint SX350 69-74 B8ES 0.025 Y60-N24L-A       3.25-19 4.00-18
750 K-model 45 S.V. 52-53                
  Servicar 32-73 A-6 0.024 H-2          
  WL 45" SV 29                
  XR750 Racer B6ES 0.02         4.00-19 4.00-19
883 XLH883 Sportster 86-90 DCPR7E 0.04 YB16-B 530-110 21 48 MJ90-19 MT90-16
  XLH883 Sportster 5 sp 91-92 DCPR7E 0.04 YB16-B 530-110 21 48 100/90-19 130/90-16
  XLH88 Sportster/Dlx/Hugger 91 -96 DCPR7E 0.04 YB16-B Belt     100/90-19 130/90-16
  XLH883 Sportster/Dlx/Hugger 97-03 DCPR7E 0.04 YTX20L-BS Belt     100/90-19 130/90-16
  XLH883 Sportster 04 DCPR7E     Belt     100/90-19 150/80-16
  XLH883C Sportster Custom 99-03 DCPR7E 0.04 YTC20L-BS Belt     MH90-21 130/90-16
883 XL883C Sportster Custom 04 DCPR7E 0.04   Belt     MH90-21 150/80-16
  XL883R Sportster 02-03 DCPR7E 0.04 YTX20L-BS Belt     100/90-19 130/90-16
900 K/KH model SV 54-56 B6L 0.03 H2 530-106 21 51    
  XL OHV Sportster 57-58 B6L 0.03 H2 530-106 21 51    
  XLCH Competition Hot 59-66 B6L 0.03   530-106 21 51    
  XLCH Comp. w/Mag 67-69 B6L 0.03   530-106 21 51    
  XLCH Comp. w/Battery 70-E71 B6L 0.03 12N7-4A 530-106 21 51    
  XLH Hwy Use 59-64 B6L 0.03 H2 530-106 21 51    
  XLHHwy Use 12V65-66 B6L 0.03 12N7-4A 530-106 21 51    
  XLH w/electric start 67-E71 B6L 0.03 12N7-4A 530-106 21 51    
1000 XLCH w/kick start171-78 B6L 0.04 12N7-4A 530-106 21 51 MM90-19 4.25-18
  XLCR Cafe Racer 77-78 B6L 0.04 YB16-B 530-106 21 51 MM90-19 4.25-18
  XLH Sportster 67-78 B6L 0.04 YHD12 530-106 21 51 MM90-19 4.25-18
  XLH Sportster 79-82 BPR7HS 0.04 YB16-B 530-106 21 51 MJ90-19 MT90-16
  XLH Sportster 83-85 BPR7HS 0.04 YB16-B 530-110 21 48 MJ90-19 MT90-16
  XLS Roadster 79-82 BPR7HS 0.04 YB16-B 530-106 21 51 MJ90-19 MT90-16
  XLS Roadster 83-85 BPR7HS 0.04 YB16-B 530-110 21 48 MJ90-19 MT90-16
  XLX-61 83-85 BPR7HS 0.04 YB16-B 530-110 20 48 MJ90-19 MT90-16
  XR1000 Race model 83-85 BPR7ES-11 0.04 YB16-B       100/90-19 130/90-16
1100 XLH1100 Sportster Deluxe 86-87 DCPR7E 0.04 YB16-B 530-110 21 48 MJ90-19 MT90-16
1200 XLH1200 Sportster Dlx. 88-90 DCPR7E 0.04 YB16-B 530-110 21 48 MM90-19 MT90-16
  XLH1200 Sportster 5 sp. 91-96 DCPR7E 0.04 YB16-B Belt     100/90-19 130/90-16
  XLH1200 Sportster 5 sp. 97-03 DCPR7E 0.04 YTX20L-BS Belt     100/90-19 130/90-16
  XL1200C Custom96-96 DCPR7E 0.04 YB16-B Belt     MH90-21 130/90-16
  XL1200C Custom 97-03 DCPR7E 0.04 YTX20L-BS Belt     MH90-21 130/90-16
  XL1200C Custom 04 DCPR7E 0.04   Belt     MH90-21 150/80-16
  XL1200R Roadster04 DCPR7E 0.04   Belt     100/90-19 150/80-16
  XL1200S Sport96-96 DCPR7E 0.04 YB16-B Belt     MH90-21 130/90-16
  XL1200S Sport 97-03 DCPR7E 0.04 YTX20L-BS Belt     100/90-19 130/90-16
FL-FX BIG TWIN                
1000 FL w/Knucklehead 36-47 *A6 0.024 H2 530-102 22 51    
1200 FL w/Knucklehead 41-47 **A6 0.024 H2 530-102 22 51 5.00-16 5.00-16
  FL w/Panhead 48-64 ***A6 0.024 H2 530-102 22 51 5.00-16 5.00-16
*Models 36-47 w/14mm heads, B6S plug, .024 gap; **FL models 48-61 w/14mm heads, B6L pi
SHOVELHEAD MOTOR                
1200 FL/FLH/C Electra Glide 65-74 XR5 0.025 YHD-12 530-102 22 51 5.10-16 5.10-16
74 FLH/C Electra Glide 75-80 BPR5ES-11 0.04 YHD-12 530-100 22 51 5.10-16 5.10-16
cu. in. FLHS Electra Glide Sport 77-80 BPR5ES-11 0.04 YHD-12 530-100 22 51 5.10-16 5.10-16
  FX Kick only 71-74 XR5 0.025 12N7-4A 530-102 23 51 MM90-19 5.10-16
  FX Kick only 75-78 BPR5ES-11 0.04 12N7-4A 530-100 23 51 MM90-19 5.10-16
  FXE Elec. start 73-74 XR5 0.025 YB16-B 530-100 23 51 MM90-19 5.10-16
  FXE Elec. start 75-80 BPR5ES-11 0.04 YB16-B 530-100 23 51 MM90-19 5.10-16
  FXEF Fat Bob 79-80 BPR5ES-11 0.04 YB16-B 530-100 23 51 MJ90-19 5.10-16
  FXS Low Rider 77-80 BPR5ES-11 0.04 YB16-B 530-100 23 51 MJ90-19 5.10-16
1340 FLH/C Electra Glide 78-79 BP5ES-11 0.04 YHD12 530-102 22 51 MT90-16 MT90-16
80 FLH/C Electra Glide 80-81 BPR5ES-11 0.04 YHD12 530-102 22 51 MT90-16 MT90-16
cu. in. FLH/C Electra Glide 82-84 ZGR5C 0.04 YHD12 530-102 22 51 MT90-16 MT90-16
  FLHS Electra Glide Sport 80-81 BPR5ES-11 0.04 YHD12 530-102 22 51 MT90-16 MT90-16
  FLHS Electra Glide Sport 82-84 ZGR5C 0.04 YHD12 530-102 22 51 MT90-16 MT90-16
  FLHT/C Tour Glide 83 ZGR5C 0.04 Y50-N18L-A 530-110 22 51 MT90-16 MT90-16
  FLT/C Tour Glide 80-81 BPR5ES-11 0.04 Y50-N18L-A 530-110 22 51 MT90-16 MT90-16
  FLT/C Tour Glide 82-83 ZGR5C 0.04 Y50-N18L-A 530-110 22 51 MT90-16 MT90-16
  FXB Sturgis 80-81 BPR5ES-11 0.04 YB16-B Belt     MJ90-19 MT90-16
  FXB Sturgis 82 ZGR5C 0.04 YB16-B Belt     MJ90-19 MT90-16
  FXE-80 Super Glide 81 BPR5ES-11 0.04 YB16-B 530-102 23 51 MJ90-19 MT90-16
  FXE-80 Super Glide 82-84 ZGR5C 0.04 YB16-B 530-102 23 51 MJ90-19 MT90-16
  FXR Super Glide II 82-84 ZGR5C 0.04 YB16-B 530-110 23 51 MJ90-19 MT90-16
  FXRDG Disc Glide 83 ZGR5C 0.04 YB16-B 530-110 23 51 MJ90-19 MT90-16
  FXRS Super Glide II Dlx. 82-84 ZGR5C 0.04 YB16-B 530-110 23 51 MJ90-19 MT90-16
  FXRT Sport Glide 82-84 ZGR5C 0.04 YB16-B 530-110 23 51 MJ90-19 MT90-16
  FXS Low Rider 78-1/2-84 BP5ES-11 0.04 YB16-B 530-102 23 51 MJ90-19 MT90-16
  FXS Low Rider 80-81 BPR5ES-11 0.04 YB16-B 530-102 23 51 MJ90-19 MT90-16
  FXS Low Rider 82 ZGR5C 0.04 YB16-B 530-102 23 51 MJ90-19 MT90-16
  FXSB Low Rider 83-84 ZGR5C 0.04 YB16-B Belt     MJ90-19 MT90-16
  FXWG Wide Glide 80-81 BPR5ES-11 0.04 YB16-B 530-110 23 51 MH90-21 MT90-16
  FXWG Wide Glide 82-84 ZGR5C 0.04 YB16-B 530-102 23 51 MH90-21 MT90-16
EVOLUTION and TWIN CAM 88 MOTOR              
1340 FLHR/I Electra Glide Rd King 94-96 BPR5ES-11 0.04 Y50-N18L-A Belt     MT90-16 MT90-16
80 FLHR/I Road King 97-98 BPR5ES-11 0.04 YB30L-B Belt     MT90-16 MT90-16
cu. in. FLHR/I/CI/SE Road King/                
& Classic 99-03 DCPR7E 0.04 YB30L-B Belt     MT90-16 MT90-16
1450 FLHR/I/CI/S/SI Road King/                
88 Classic/Custom 04       Belt     MT90-16 MU85-16
cu. in. FLHS Electra Glide Sport 84-93 BPR5ES-11 0.04 Y50-N18L-A Belt     MT90-16 MT90-16
  FLHT Electra Glide 84-96 BPR5ES-11 0.04 Y50-N18L-A Belt     MT90-16 MT90-16
  FLHT Electra Glide 97-98 BPR5ES-11 0.04 YB30L-B Belt     MT90-16 MT90-16
  FLHT/I Electra Glide 99-03 DCPR7E 0.04 YB30L-B Belt     MT90-16 MT90-16
  FLHT/I Electra Glide 04     __. Belt     MT90-16 MU85-16
  FLHTC/U/I Classic/Ultra 84-96 BPR5ES-11 0.04 Y50-N18L-A Belt     MT90-16 MT90-16
  FLHTC/U/I Classic/Ultra 97-98 BPR5ES-11 0.04 YB30L-B Belt     MT90-16 MT90-16
  FLHTC/I/UI Classic/Ultra 99-03 DCPR7E 0.04 YB30L-B Belt     MT90-16 MT90-16
  FLHTC/I/UI Classic/Ultra 04       Belt     MT90-16 MU85-16
  FLST/C Heritage Softail 86-90 BPR5ES-11 0.04 YB16-B Belt     MT90-16 MT90-16
  FLST/C/N Heritage Softail91-96 BPR5ES-11 0.04 YB16HL-A-CX Belt     MT90-16 MT90-16
FLSTC Heritage Softail                
  Classic 97-99 BPR5ES-11 0.04 YTX20L-BS Belt     MT90-16 MT90-16
FLSTC/I Heritage Softail                
  Classic 00-02 DCPR7E 0.04 YTX20L-BS Belt     MT90-16 MT90-16
  FLSTC/I Heritage Softail Classic 03 DCPR7E 0.04 YTX20L-BS Belt     MT90-16 150/80-16
  FLSTC/I Heritage Softail Classic 04       Belt     MT90-16 150/80-16
  FLSTFFatBoy 91-96 BPR5ES-11 0.04 YB16HL-A-CX Belt     MT90-16 MT90-16
  FLSTF Fat Boy 97-99 BPR5ES-11 0.04 YTX20L-BS Belt     MT90-16 MT90-16
  FLSTF Fat Boy 00-02 DCPR7E 0.04 YTX20L-BS Belt     MT90-16 MT90-16
  FLSTF/I Fat Boy 03 DCPR7E 0.04 YTX20L-BS Belt     MH90-21 150/80-16
  FLSTF/I Fat Boy 04       Belt     MT90-16 150/80-16
  FLST-S Heritage Softail                
  Springer 97-99 BPR5ES-11 0.04 YTX20L-BS Belt     MT90-16 MT90-16
FLST-S Heritage Softail                
  Springer 00-02 DCPR7E 0.04 YTX20L-BS Belt     MT90-16 MT90-16
  FLSTS/I Heritage Softail Springer 03 DCPR7E 0.04 YTX20L-BS Belt     MT90-16 MU85-16
  FLT Tour Glide 84-93 BPR5ES-11 0.04 Y50-N18L-A Belt     MT90-16 MT90-16
  FLTC/U/I Classic/Ultra 84-96 BPR5ES-11 0.04 Y50-N18L-A Belt     MT90-16 MT90-16
  FLTR/I Road Glide 99-03 DCPR7E 0.04 YB30L-B Belt     MT90-16 MT90-16
  FLTRI Road Glide 04       Belt     MT90-16 MU85-16
  FXD Dyna Super Glide 95-96 BPR5ES-11 0.04 YB16HL-A-CX Belt     100/90-19 130/90-16
  FXD Dyna Super Glide 97-98 BPR5ES-11 0.04 YTX20L-BS Belt     100/90-19 130/90-16
  FXD Dyna Super Glide 99-02 DCPR7E 0.04 YTX20L-BS Belt     100/90-19 130/90-16
  FXD Dyna Super Glide 03 DCPR7E 0.04 YTX20L-BS Belt     100/90-19 150/80-16
  FXD/I Dyna Super Glide 04       Belt     100/90-19 150/80-16
  FXDB Dyna-Glide 91-93 BPR5ES-11 0.04 YB16HL-A-CX Belt     MM90-19 MT90-16
  FXDL Dyna Low Rider 93-96 BPR5ES-11 0.04 YB16HL-A-CX Belt     MM90-19 MT90-16
  FXDL Dyna Low Rider 97-98 BPR5ES-11 0.04 YTX20L-BS Belt     MM90-19 MT90-16
  FXDL Dyna Low Rider 99-02 DCPR7E 0.04 Y~D<20L-BS Belt     MM90-19 MT90-16
  FXDL Dyna Low Rider 03 DCPR7E 0.04 YTX20L-BS Belt     100/90-19 150/80-16
  FXDL7I Dyna Low Rider 04             100/90-19 150/80-16
  FXDS Conv. Low Rider 94-96 BPR5ES-11 0.04 YB16HL-A-CX Belt     MM90-19 MT90-16
  FXDS Conv. Dyna Con. 97-98 BPR5ES-11 0.04 YTX20L-BS Belt     MM90-19 MT90-16
  FXDS Conv. Dyna Con. 99-00 DCPR7E 0.04 YTX20L-BS Belt     MM90-19 MT90-16
  FXDWG Dyna Wide Glide 93-96 BPR5ES-11 0.04 YB16HL-A-CX Belt     MH90-21 MT90-16
  FXDWG Dyna Wide Glide 97-98 BPR5ES-11 0.04 YTX20L-BS Belt     MH90-21 MT90-16
FXDWG/2/3 Dyna                
  Wide Glide 99-02 DCPR7E 0.04 YTX20L-BS Belt     MH90-21 MT90-16
  FXDWG Dyna Wide Glide 03 DCPR7E 0.04 YTX20L-BS Belt     MH90-21 150/80-16
  FXDWG/I Dyna Wide Glide 04       Belt     MH90-21 150/80-16
  FXDX Dyna Super Glide/Sport 99-02 DCPR7E 0.04 YTX20L-BS Belt     100/90-19 130/90-16
  FXDX Dyna Super Glide/Sport 03 DCPR7E 0.04 YTX20L-BS Belt     100/90-19 150/80-16
  FXDX/I Dyna Super Glide/Sport 04       Belt     100/90-19 150/80-16
  FXDXT Dyna T-Sport 01 -02 DCPR7E 0.04 YTX20L-BS Belt     100/90-19 130/90
  FXDXT Dyna T-Sport 03 DCPR7E 0.04 YTX20L-BS Belt     100/90-19 150/80-16
  FXEF Fat Bob 85 BPR5ES-11 0.04 YB16-B 530-102 23 51 MJ90-19 MT90-16
  FXLR Low Rider Custom 87-94 BPR5ES-11 0.04 YB16-B Belt     MH90-21 MT90-16
  FXR Super Glide II 85 BPR5ES-11 0.04 YB16-B 530-110 23 51 MJ90-19 MT90-16
  FXR Super Glide II 86-91 BPR5ES-11 0.04 YB16-B Belt     MJ90-19 MT90-16
  FXR-SP Sport Edition 88-91 BPR5ES-11 0.04 YB16-B Belt     100/90-19 MT90-16
  FXRC Custom 85-1/2-87-1/2 BPR5ES-11 0.04 YB16-B 530-110 23 51 MM90-19 MT90-16
  FXRD Grand Tour Edition 86 BPR5ES-11 0.04 YB16-B Belt     MM90-19 MT90-16
  FXRS Low Glide Deluxe 85 BPR5ES-11 0.04 YB16-B 530-110 23 51 MM90-19 MT90-19
  FXRS Low Glide Deluxe 86-93 BPR5ES-11 0.04 YB16-B Belt     MM90-19 MT90-16
1340 FXRT Sport Glide 85 BPR5ES-11 0.04 YB16-B 530-110 23 51 MM90-19 MT90-16
80 FXRT Sport Glide 86-93 BPR5ES-11 0.04 YB16-B Belt     MM90-19 MT90-16
& FXSB Low Rider w/Belt 85 BPR5ES-11 0.04 YB16-B Belt     MJ90-19 MT90-16
1450 FXST/C Softail 84-86 BPR5ES-11 0.04 YB16-B 530-102 23 51 MH90-21 MT90-16
88 FXST/C Softail 5 sp 87-90 BPR5ES-11 0.04 YB16-B Belt     MH90-21 MT90-16
cu. in. FXST/C Softail 5 sp 91-96 BPR5ES-11 0.04 YB16HL-A-CX Belt     MH90-21 MT90-16
  FXST/C Softail 97-99 BPR5ES-11 0.04 YTX20L-BS Belt     MH90-21 MT90-16
  FXST/C/I Softail 00-02 DCPR7E 0.04 YTX20L-BS Belt     MH90-21 MT90-16
  FXST/I Softail 03 DCPR7E 0.04 YTX20L-BS Belt     MH90-21 150/80-16
  FXST/I Softail (04       Belt     MH90-21 150/80-16
  FXSTB Night Train 99 BPR5ES-11 0.04 YTX20L-BS Belt     MH90-21 MT90-16
  FXSTB/I Night Train 00-02 DCPR7E 0.04 YTX20L-BS Belt     MH90-21 MT90-16
  FXSTB/I Night Train 03 DCPR7E 0.04 YTX20L-BS Belt     MH90-21 150/80-16
  FXSTB/I Night Train 04       Belt     MH90-21 150/80-16
  FXSTD/I/SE Softail Duece 00-03 DCPR7E 0.04 YTX20L-BS Belt     MH90-21 160/70-17
  FXSTD/I Softail Duece 04       Belt     MH90-21 160/70-17
  FXSTS Springer 87-90 BPR5ES-11 0.04 YB16-B Belt     MH90-21 MT90-16
  FXSTS Springer Softail 91-96 BPR5ES-11 0.04 YB16HL-A-CX Belt     MH90-21 MT90-16
  FXSTS Springer Softail 97-99 BPR5ES-11 0.04 YTX20L-BS Belt     MH90-21 MT90-16
  FXSTS Springer Softail 00-02 DCPR7E 0.04 YTX20L-BS Belt     MH90-21 MT90-16
  FXSTS/I Springer Softail 03 DCPR7E 0.04 YTX20L-BS Belt     MH90-21 150/80-16
  FXSTS/I Springer Softail 04       Belt     MH90-21 150/80-16
  FXSTS-B Bad Boy 95-96 BPR5ES-11 0.04 YB16L-A-CX Belt     MH90-21 MT90-16
  FXSTS-B Bad Boy 97-99 BPR5ES-11 0.04 YTX20L-BS Belt     MH90-21 MT90-16
  FXSTS-B Bad Boy 00-01 DCPR7E 0.04 Y~D<20L-BS Belt     MH90-21 MT90-16
  FXWG Wide Glide 85-86 BPR5ES-11 0.04 YB16-B 530-110 23 51 MH90-21 MT90-16
REVOLUTION MOTOR                
1130 VRSCA V-Rod 02-04 DCPR8E 0.04 YTX14-BS Belt     120/70-19 180/55-18 I