Lancaster Classes

Lancaster Snow Derby Classes

Mod / 250cc / 340cc / 500cc (Lancaster Snow Derby Rules)

  1. Air cooled engines / leaf sprung chassis 1985 and older may compete. Engine sizes may race up in classes but not down.
  2. Any drive or driven clutch
  3. No EFI / must be naturally aspirated engines.
  4. Any carb allowed, No flatslides.
  5. Engine brand must match chassis brand.
  6. Any track, ¾ lug max, studding allowed / 2 per pitch, 3/8 max above track lug.
  7. Carbides allowed.
  8. Any internal or external engine modifications allowed
  9. Any exhaust system allowed.
  10. Any chaincase, any gears, any sprocket size
  11. Skis may be any commercially available steel, plastic or aluminum ski of leaf spring design. Springs must be steel and functional.
  12. Brakes may be upgraded and the location may be moved, shielding must be in place if disc is moved to the driveshaft.

X Mod Open (Lancaster Snow Derby Rules)

  1. Air cooled engines 1985 and older, originally designed as a snowmobile engine may compete, no cylinder or CC limit.
  2. Leaf Sprung 1985 or older chassis
  3. Chassis and Engine brand do not need to match.
  4. All other Mod class rules apply.

Elan / Spirit "Juice" class (Lancaster Snow Derby Rules)

  1. Up to 335 cc Rotax single may compete.
  2. No 292cc Rotax single or 250cc Rotax twin engines allowed.
  3. Stock clutches drive and driven.
  4. Slide rail or Bogie Elan / Spirit suspensions allowed.
  5. Stock Steel Skis only.
  6. HR carb or 34mm VM Mikuni allowed.
  7. Point ignition only.
  8. Stock exhaust systems only.
  9. No internal / external engine modifications allowed.
  10. Handlebar mods allowed.

Combo 340CC Mod / Open Air class (Lancaster Snow Derby Rules)

340cc mod guideline

  1. Air cooled engines / leaf sprung chassis 1985 and older may compete.
  2. Any drive or driven clutchd
  3. No EFI / must be naturally aspirated engines.
  4. Any carb allowed, No flatslides.
  5. Engine brand must match chassis brand.
  6. Any track, ¾ lug max, studding allowed max 2 studs per pitch 3/8 max above track lug.
  7. Carbides allowed.
  8. Any internal or external engine modifications allowed
  9. Any exhaust system allowed.
  10. Any chaincase, any gears, any sprocket size
  11. Skis may be any commercially available steel, plastic or aluminum ski of leaf spring design. Springs must be steel and functional.
  12. Brakes may be upgraded and the location may be moved, shielding must be in place if disc is moved to the driveshaft
  13. Up to 340cc may compete

    Open Air guideline

  1. F/C or F/A engine 550cc and under may compete.
  2. 1985 and older sleds / engines may compete, must be leaf sprung.
  3. Drive clutch may be OEM or Comet 102 / 94c duster / powerblock
  4. Driven clutch OEM
  5. Brakes may be upgraded but must remain original mounting and mounting location.
  6. Carbides allowed
  7. studding allowed
  8. Handlebars may be modified or replaced with any commercially available handlebar. Hooks may be added.
  9. No programmable ignitions
  10. Exhaust must be OEM for model without modification.
  11. General rules for 1985 and older apply.