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Mild Bill (Asshole #27)
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Cam Specs -- Sportster
Chris deHahn supplied his notes for this section.
 |
V prefix for 1985-1990 4 speed Evo XL |
|
N prefix for 1991-up 5 speed Evo XL |
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Timing specs taken at .053" cam lift in crank degrees, top spec intake, bottom spec exhaust. |
|
Spring travel specs are the minimum for setting coil bind. |
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TDC list specs are for stock Evo 1.633 rocker ratio. |
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Evolution (timing at .053") ----------------------------------------------------- SPRING LIFT @ GRIND TIMING DURATION LIFT TRAVEL SPRINGS TDC ----------------------------------------------------- Stock 2/41 223 .458 - stock - 41/14 235 .414 - - - V2/N2 22/38 240 .465 .495 stock .198 46/18 244 .440 .470 - .198 V4/N4 30/46 256 .490 .530 stock .198 52/24 256 .490 .530 - .198 V6/N6 34/50 264 .490 .530 stock .215 56/28 264 .490 .530 - .215 V8/N8 32/44 256 .490 .530 stock .223 56/28 264 .490 .530 - .215 V9/N9 33/53 266 .555 .600 Andrews .240 53/33 266 .555 .600 - .240 BV/NV 35/59 274 .590 .640 Andrews .260 59/35 274 .590 .640 - .260 ----------------------------------------------------- Pre-Evolution (timing at .050") -------------------------------------- SPRING LIFT @ GRIND TIMING DURATION LIFT SPRINGS -------------------------------------- P/PB+ 34/40 254 .400 stock 43/31 254 .410 Y 35/47 262 .425 stock 53/29 262 .425 R5 33/41 254 .445 stock 43/31 254 .445 X 35/55 270 .450 stock 57/33 270 .450 GX 35/63 278 .445 stock 57/33 270 .450 V9 32/52 264 .490 Andrews 52/32 264 .490 AX 29/57 266 .550 Andrews 57/29 266 .550 BV 34/58 272 .520 Andrews 58/34 272 .520 DX 38/66 284 .550 Andrews 66/38 284 .550 XR1000#1 48/60 288 .560 stock 60/40 288 .560 XR1000#2 32/44 256 .486 stock 52/24 256 .486 --------------------------------------
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Evolution (timing at .053") -------------------------------------- GRIND TIMING DURATION LIFT -------------------------------------- 530V2 24/104/49 253 .530 54/106/18 252 .530 531V2 28/104/51 259 .531 60/107/19 259 .531 625V2 32/103/58 270 .625 62/107/29 271 .625 694V2 28/104/56 264 .694 59/107/26 265 .694 710V2 41/102/63 284 .710 38/106/34 282 .710 710/694V2 41/102/63 284 .710 59/107/26 265 .694 -------------------------------------- Pre-Evolution (timing at .053") -------------------------------------- GRIND TIMING DURATION LIFT -------------------------------------- 520 25/107/54 259 .520 61/107/18 259 .520 550 32/103/58 270 .550 62/107/29 271 .550 625 41/102/63 284 .625 68/106/34 282 .625 665 42/99/62 284 .665 66/108/38 284 .665 610 28/104/56 264 .610 59/107/2 265 .610 625/610 41/102/63 284 .625 59/107/26 265 .610 535XR 25/107/54 259 .535 61/107/18 259 .535 605XR 37/96/51 268 .605 55/103/32 267 .605 --------------------------------------