LISBON STUMP JUMPERS
2010 VINTAGE RACING SERIES
To the
racers:
We hope
you enjoyed last year’s race and thank you for your support. We considered it
to be a success and certainly it created a lot of interest with sponsors and
competitors. From our observations and your comments, there have been a few
changes. Please read our 2010 rules carefully and call if you have any
questions or comments. Phone numbers to contact: General information (603)
838-5014 Dave Graham or Rules information (603) 838-6383 Brad Gooden.
All
racers must be at least 18 years of age. Also, all sleds will have a working
tether, NO exceptions. We encourage pre-registration to save time on race day
and it is less expensive for the racer.
Class I: Pure Stock Single Cylinder
1.STOCK
SLED UP TO AND INCLUDING 1973
2.HR
SIZE CARB AND PORT MAXIMUM
3.STOCK
CARB FOR YOUR SLED
4.NO
TRACTION PRODUCTS
5.NO
CARBIDE RUNNERS
6.NO
SKI SPREADERS
7.STOCK
CLUTCH ONLY-NO AFTER-MARKET REPLACEMENT TYPES
8.NO
REED VALVE ENGINES
Class II: Super Stock Single Cylinder
A.SNOWMOBILE
1.MODEL
YEAR 1973 OR OLDER
2.MUST
BE PRODUCTION LINE MODEL OFFERED TO THE PUBLIC, AND AVAILABLE WITH A SINGLE
CYLINDER ENGINE
3.NO
LIMITED PRODUCTION OR R&D MODELS
4.HANDLEBARS
MUST BE ORIGINAL, MAY BE REWORKED IN ANY MANNER,. ANY CHANGES MUST BE WELDED,
NOT ADJUSTABLE.
5.STOCK-APPEARING
SEAT
B.ENGINE
1.FAN-COOLED
SINGLE CYLINDER ONLY
2.ENGINE
BRAND MUST BE AVAILABLE STOCK OR AS AN OPTION FOR CHASSIS USED
3.OVERBORE
ALLOWED
4.NO
PORTING OR POLISHING
5.CARBURETORS
WILL BE ORIGINAL OR ANOTHER TYPE WITH SMALLER BORE
6.ANY
STOCK-TYPE MUFFLER
7.POINTS
IGNITION ONLY
8.NO
REED OR ROTARY INDUCTION
C.DRIVETRAIN
1.CHAIN
CASE AND ENTIRE DRIVE SYSTEM MUST BE ORIGINAL
2.ORIGINAL
CLUTCH OR COMET DUSTER REPLACEMENT
3.GEAR
RATIO MAY BE CHANGED
D.SUSPENSION
1.STOCK
BOGIES OR SLIDES
2.STEEL
SKIIS ONLY, NO ALUMINUM
3.SKI
SPREADERS ALLOWED, 3 INCHES PER SIDE (MAX)
4.NO
STUDS, PINS, CLAWS, ETC. NONE
5.CARBIDE
RUNNERS ALLOWED
Class III: SINGLE CYLINDER POWDER PUFF
ALL
CLASS I & II RULES APPLY
Class IV: VINTAGE FAN-COOLED TWIN-UP TO 340
CC
1.ANY
FAN-COOLED TWIN (STOCK OR MOD) UP TO AND INCLUDING 1975
2.NO
STUDS, PINS, CLAWS, ETC. NONE
Class V: VINTAGE FAN-COOLED TWIN-341 OPEN
1.ANY
FAN-COOLED TWIN (STOCK OR MOD) UP TO AND INCLUDING 1975
2.NO
STUDS, PINS, CLAWS, ETC. NONE
****IF
CLASS V OR VI DOES NOT HAVE A MINIMUM OF 5 ENTRIES, THEY WILL BE RUN AS ONE
CLASS.
Class VI: VINTAGE FREE AIR
1.ANY
YEAR FREE AIR, STOCK OR MOD
2.LEAF
SPRING FRONT ONLY
3.WORKING TETHER REQUIRED
Class VII: 50 PLUS
1.Drivers must have been born on or before January 30, 1960 - NO EXCEPTIONS
2.Any fan-cooled sled up to 1975 (single or twin cylinder)