Bulletins

All Bulletins

ID: 22-23-005 | Released: 11-Nov-22 TO:ALL ISR Affiliates
SUBJECT:ISR Technical Inspectors have authority to review data acquisition programs.
New
ID: 22-23-005 | Released: 26-Jul-22 TO:ALL ISR Oval and Enduro Affiliates
SUBJECT:Pro Champ -Pro Lite OEM Rotax piston
New
ID: 22-23-003 | Released: 14-Jul-22 TO:ALL ISR Oval Sprint Affiliates
SUBJECT: ISR is allowing the following modification of the existing Delta 2 boot for the 1999 Rotax model.
New
ID: 22-23-004 | Released: 14-Jul-22 TO:ALL ISR Oval Pro Champ 440 and Pro Lite Teams
SUBJECT:Snow deflector TEST provision on outside ski.
New
ID: 22-23-001 | Released: 13-Jul-22 TO:ALL ISR Affiliates
SUBJECT:ISR RACE AND TECH DIRECTORS SCHOOL.
New
ID: 22-23-002 | Released: 13-Jul-22 TO:ALL ISR Drag Racing Affiliates
SUBJECT:850 FACTORY SUPER TRAIL SHOOT OUT FOR HAYDAYS !
New
ID: 2021-015 | Released: 23-Dec-21 TO:ALL ISR Oval and Enduro Affiliates
SUBJECT:Fuel pump for fuel injected sleds remote from the tank.
ID: 2021-014 | Released: 15-Dec-21 TO:ALL ISR Oval and Enduro Affiliates
SUBJECT:Track availability Oval Sprint and Enduro disciplines
ID: 2021-013 | Released: 03-Dec-21 TO:ALL ISR Oval Affiliates
SUBJECT:Pro Champ Class Required reeds and reed blocks for OEM replacement
ID: 2021-013 | Released: 23-Nov-21 TO:ALL ISR Oval Affiliates
SUBJECT:JUNIOR OVALS Re: Kitty Cat engines pistons.
ID: 2021-012 | Released: 11-Nov-21 TO:ALL ISR Oval Affiliates
SUBJECT:Revised! Pro Champ Class questions from drivers and builders on Pro-Champ engine packages. 2021-2022 Season
ID: 20/21-011 | Released: 25-Oct-21 TO:ALL ISR Affiliates
SUBJECT:Pro Stock Ice-Grass-Snow drag race rules DRIVE Section of Belt Drives
ID: 20/21-010 | Released: 13-Oct-21 TO:ALL ISR Affiliates
SUBJECT: Correct Testing Procedure ISR 120 Rev Limiter
ID: 21/22-04 | Released: 16-Aug-21 TO:All ISR Affiliates
SUBJECT:ISR RACE AND TECH DIRECTORS SCHOOL.
ID: 20/21-003 | Released: 10-Aug-21 TO:All Drag Race Affiliates
SUBJECT:2021 / 2022 Drag Racing Driver Protection / Parachutes.
ID: 20-21-009 | Released: 28-Apr-21 TO:ALL ISR Affiliates
SUBJECT:ISR Modifies Helmet Rules for 2021-2022 Season
ID: 20/21-008 | Released: 19-Mar-21 TO:ALL ISR Youth Racing Affiliates
SUBJECT:Youth / 120 / Kitty Cat Racing Rules Meeting
ID: 20/21-005 | Released: 26-Feb-21 TO:All ISR Racers
SUBJECT:Application to to join the Ski-Doo Race team!
ID: 10/21-002 | Released: 15-Feb-21 TO:ALL ISR Oval / Enduro / Watercross Affiliates
SUBJECT:2021 Oval / Enduro / WaterCross Rules Meetings
ID: 20/21-003 | Released: 15-Feb-21 TO:ALL ISR Sno Cross and Cross Country Affiliates
SUBJECT:2021 Oval / Enduro / WaterCross Rules Meetings
ID: 20-21-004 | Released: 15-Feb-21 TO:ALL ISR Drag Racing Affiliates
SUBJECT:2021 Drag Racing Rules Meeting
ID: 19/20-012 | Released: 21-Oct-20 TO:ALL ISR Sno Cross Racing Affiliates
SUBJECT:Required snow flap construction for all Sno Cross Racers (Except 120's 200's)
ID: 19-20-023 | Released: 10-Mar-20 TO:ALL ISR Racing Affiliates
SUBJECT:Application to to join the Ski-Doo Race team!
ID: 19/20-019 | Released: 13-Feb-20 TO: ALL ISR Oval / Enduro / Watercross Affiliates
SUBJECT:2020 ISR Oval / Enduro / WaterCross Rules Meeting
ID: 19/20-020 | Released: 13-Feb-20 TO:ALL ISR Sno Cross and Cross Country Affiliates
SUBJECT:2020 ISR Sno Cross and Cross Country Rules Meeting
ID: 19-20-021 | Released: 13-Feb-20 TO: ALL ISR Drag Racing Affiliates
SUBJECT:2020 ISR Drag Racing Rules Meeting
ID: 19/20-021 | Released: 13-Feb-20 TO:ALL ISR Youth Racing Affiliates
SUBJECT:2020 ISR Youth / 120 / Kitty Cat Racing Rules Meeting
ID: 19/20-018 | Released: 10-Feb-20 TO:Oval / Vintage Oval /Enduro Racing Affiliates
SUBJECT:Pro Lite and Pro Champ: No modifications to the reeds, reed stops, or reed block
ID: 19/20-017 | Released: 06-Jan-20 TO:ALL ISR Oval /Enduro Racing Affiliates
SUBJECT:Pro Champ & Prolite Clarify all Mikuni round slide carb rules
ID: 19/20-015 | Released: 03-Jan-20 TO:ALL ISR Sno Cross Racing Affiliate
SUBJECT:2020 Transition Class Updates
ID: 19/20-016 | Released: 03-Jan-20 TO:ALL ISR Sno Cross Racing Affiliates
SUBJECT:2020 JUNIOR NOVICE 10-13 AND GIRLS NOVICE 9-12 Updates
ID: 19/20-014 | Released: 30-Dec-19 TO:ALL ISR Oval / Vintage Oval /Enduro Racing Affiliates
SUBJECT:Ski Hoop/ Ski Tip Turn up Measurement
ID: 19/20-013 | Released: 11-Dec-19 TO:ALL ISR Oval / Enduro Racing Affiliates
SUBJECT:F-III rules clarifications and updates:
ID: 19/20-011 | Released: 01-Oct-19 TO:ALL ISR Oval Racing Affiliates
SUBJECT:USSA PRO STAR PRO CHAMP CUP CLASS Updated Clairifications
ID: 19 / 20 - 010 | Released: 12-Sep-19 TO:All ISR Oval Affiliates
SUBJECT:19-20-010 F-III - Ski-doo gas tank cover removal
ID: 18/19- 009 | Released: 22-Aug-19 TO:All ISR Racing Affiliates
SUBJECT:ISR RACE AND TECH DIRECTORS SCHOOL.
ID: 18-19-010 | Released: 05-Aug-19 TO:All ISR Racing Affiliates
SUBJECT: Four-stroke classifications in Drag Racing
ID: 18-19-011 | Released: 05-Aug-19 TO:All ISR Racing Affiliates
SUBJECT:Four-stroke classifications
ID: 18/19-009 | Released: 17-Jun-19 TO:All Oval Affilaites
SUBJECT:USSA PRO STAR CUP CLASS ERDC/USSA PRO CHAMP
ID: 18/19-008 | Released: 13-May-19 TO:ALL ISR Racing Drag Affiliates
SUBJECT:Drag Racing Fuel Programmer Bulletin
ID: 18/19-008 | Released: 13-May-19 TO:ALL ISR Oval Racing Affiliates
SUBJECT:New Oval Formula III Class
ID: 18/19-007 | Released: 11-Mar-19 TO:ALL ISR Racing Affiliates
SUBJECT:Application to to join the Ski-Doo Race team!
ID: 18/19-006 | Released: 28-Feb-19 TO:ALL ISR Youth Racing Affiliates
SUBJECT:ISR Youth / 120 / Kitty Cat Racing Rules Meeting
ID: 18-19-006 | Released: 27-Feb-19 TO:ALL ISR Drag Racing Affiliates
SUBJECT:ISR Drag Racing Rules Meeting
ID: 18/19-005 | Released: 13-Feb-19 TO:ISR Oval / Enduro Affiliates
SUBJECT:(335-275 Cometic gasket is considered illegal for competition in F500 Class.
ID: 18/19-003 | Released: 07-Feb-19 TO:Oval / Enduro / WaterCross Rules Meeting Afiliates
SUBJECT:2019 ISR Oval / Enduro / WaterCross Rules Meeting
ID: 18/19-004 | Released: 07-Feb-19 TO:ISR Sno Cross and Cross Country Affiliates
SUBJECT: 2019 ISR Sno Cross and Cross Country Rules Meeting
ID: 18/19-002 | Released: 30-Nov-18 TO:All SnoCross Affiliate
SUBJECT:2019 Venting in Stock Snow Cross
ID: 18/19-001 | Released: 29-Nov-18 TO:All SnoCross Affiliate
SUBJECT:2019 Sno Cross Windshields/Deflectors
ID: 16/17- 016 | Released: 29-Aug-18 TO:All ISR Racing Affiliates
SUBJECT:2018 ISR RACE AND TECH DIRECTORS SCHOOL.
ID: | Released: 03-Apr-18 TO:AllAffiliates
SUBJECT:BRP Skidoo 2019 SNOWMOBILE RACE APPLICATION
ID: | Released: 21-Feb-18 TO:ALL ISR Youth Racing Affiliates
SUBJECT:2018 Youth / 120 / Kitty Cat Racing Rules Meeting
ID: | Released: 21-Feb-18 TO:ALL ISR Oval / Enduro / Watercross Affiliates
SUBJECT:ISR Oval / Enduro / WaterCross Rules Meeting
ID: | Released: 21-Feb-18 TO:ALL ISR Sno Cross and Cross Country Affiliates
SUBJECT:ISR Sno Cross and Cross Country Rules Meeting
ID: | Released: 21-Feb-18 TO:ALL ISR Drag Racing Affiliates
SUBJECT:ISR Drag Racing Rules Meeting
ID: 17/18-012 | Released: 05-Dec-17 TO:ALL ISR Sno Cross Affiliates
SUBJECT:2018 List of lightweight silencers
ID: 17/18-014 | Released: 05-Dec-17 TO:ALL ISR Sno Cross & Kitty Cat 120 Affiliates
SUBJECT:2018 Running Board Support Kit // Arctic Cat ZR 200 & Yamaha SnoScoot
ID: 17/18-013 | Released: 30-Nov-17 TO:ALL ISR Sno Cross Affiliates
SUBJECT:2018 600R Race Sled Fuel Pump Replacement
ID: 17-18-011 | Released: 20-Nov-17 TO:ALL ISR Sno Cross Affiliates
SUBJECT:2018 600RS Ski-Doo Internal cab temperature
ID: 17/18-010 | Released: 10-Nov-17 TO:All Oval Affiliates
SUBJECT:Indy 500 trailing arms used in F-500 class
ID: 17-18-009 | Released: 01-Nov-17 TO:All Sno Cross Affilaites
SUBJECT:17-18-009 Body Panel replacement
ID: 17-18-008 | Released: 03-Oct-17 TO:ALL ISR Sno Cross Affiliates
SUBJECT:All Stock Sno Cross Gusseting/Reinforcement
ID: 16-17-001 | Released: 11-Jan-17 TO:All ISR Sno Cross Afiliates
SUBJECT:Carbon fiber and titanium is prohibited
ID: 15-16-016 | Released: 14-Nov-16 TO:All Oval Affiliates
SUBJECT:Champ 440 Class engine rules #7
ID: 15-16-001 | Released: 05-Oct-16 TO:All ISR Racing Affiliates
SUBJECT:Four-stroke classifications
ID: 15-16-002 | Released: 05-Oct-16 TO:All ISR Racing Affiliates
SUBJECT:Four-stroke classifications in Drag Racing
ID: 15-16-003 | Released: 05-Oct-16 TO:All ISR Racing Affiliates
SUBJECT:FOUR-STROKE CLASSIFICATIONS IN SNOW DRAG RACING
ID: 15/16-015 | Released: 16-Aug-16 TO:All ISR Racing Affiliates
SUBJECT:2016 ISR RACE AND TECH DIRECTORS SCHOOLS
ID: 15-16-014 | Released: 07-Jul-16 TO:ALL ISR Water Cross Affiliates
SUBJECT: Handlebar Controls on WaterCross sleds.
ID: 15-16-012 | Released: 15-Mar-16 TO:All Drag Race Affiliates
SUBJECT:Drag racing minimum ride height clarification.
ID: 15-16-007 | Released: 24-Feb-16 TO:ALL ISR Drag Racing Affiliates
SUBJECT:Drag Racing Rules Meeting
ID: 15/16-009 | Released: 24-Feb-16 TO:ALL ISR Oval / Enduro / Watercross Affiliates
SUBJECT: Oval / Enduro / WaterCross Rules Meeting
ID: 15/16-010 | Released: 24-Feb-16 TO:ALL ISR Sno Cross and Cross Country Affiliates
SUBJECT:Sno Cross and Cross Country Rules Meeting
ID: 15-16-011 | Released: 24-Feb-16 TO:ALL ISR Youth Racing Affiliates
SUBJECT:Youth / 120 / Kitty Cat Racing Rules Meeting
ID: 15/16-005 | Released: 06-Jan-16 TO:Oval & Enduro Affiliates
SUBJECT:V-Force/Moto Tassinari Pro Lite Ski Suspension and Steering Omission:
ID: 15/16-003 | Released: 29-Oct-15 TO:ALL ISR SNO CROSS Affiliates
SUBJECT:Studs are allowed in JUNIOR NOVICE 10 -13 & GIRLS ONLY JR NOVICE 9 -13
ID: 15/16-001 | Released: 18-Sep-15 TO:ALL ISR Enduro Affiliates
SUBJECT:Enduro PRO MOD 600 - SEMI PRO MOD 600 - PRO AM ENDURO
ID: 14-15-023 | Released: 28-Aug-15 TO:All Oval Affiliates
SUBJECT:Sportsman 600 Suspension Rules Update
ID: 14-15-024 | Released: 28-Aug-15 TO:ALL ISR Affiliates
SUBJECT:Appeals Process (Please Read and Have Forms Available At All Events)
ID: 14/15-022 | Released: 25-Aug-15 TO:ALL ISR DRAG Racing Affiliates
SUBJECT:ISR Drag Racing Fuel Clarification
ID: 14-15-007 | Released: 17-Apr-15 TO:ALL ISR Affiliates
SUBJECT:Upper Body Protection That Meets ISR Guidelines added HMK Protective Vest
ID: 14-15-020 | Released: 24-Feb-15 TO:ALL ISR Drag Racing Affiliates
SUBJECT:Drag Racing/ Snow drag From 2013 book, omitted in transferring from text to web format.
ID: 14-15-018 | Released: 23-Feb-15 TO:ALL ISR Affiliates
SUBJECT: 600 cc Race Snowmobiles will be the format for Junior Novice classes
ID: 14-15-017 | Released: 23-Feb-15 TO:ALL ISR Affiliates
SUBJECT:600 cc race snowmobileswill be the format for Transition classes
ID: 14-15-019 | Released: 23-Feb-15 TO:ALL ISR Hill Climb Racing Affiliates
SUBJECT:Hillclimb , Mountain Cross Rules Meeting
ID: 14-15-014 | Released: 20-Feb-15 TO:ALL ISR Youth Racing Affiliates
SUBJECT:Youth / 120 / Kitty Cat Racing Rules Meeting
ID: 14-15-012 | Released: 20-Feb-15 TO:ALL ISR Drag Racing Affiliates
SUBJECT:Drag Racing Rules Meeting
ID: 14-15-011 | Released: 20-Feb-15 TO: ALL ISR Sno Cross and Cross Country Affiliates
SUBJECT:Sno Cross and Cross Country Rules Meeting
ID: 14-15-010 | Released: 20-Feb-15 TO:ALL ISR Oval / Enduro / Watercross Affiliates
SUBJECT:Oval / Enduro / WaterCross Rules Meeting
ID: 14-15-016 | Released: 20-Feb-15 TO: ALL ISR Youth Racing Affiliates
SUBJECT:Max-Torque, Kitty Cat Clutch Blue Spring
ID: 14/15-009 | Released: 08-Jan-15 TO:ALL ISR Affiliates
SUBJECT:V-Force/Moto Tassinari Pro Lite Carburetors
ID: 14-15-008 | Released: 19-Dec-14 TO:ALL ISR Affiliates
SUBJECT:600RS - Rebalancing the Stuffing Blocks of the Crankshaft
ID: 14/15-006 | Released: 10-Dec-14 TO:ALL ISR Affiliates running stock 120 classes
SUBJECT:Rev Limiter information
ID: 14/15-005 | Released: 26-Nov-14 TO:ALL ISR Sno Cross and Cross Country Affiliates
SUBJECT:Ski Trimming
ID: 14/15-004 | Released: 06-Nov-14 TO:ALL ISR Affiliates
SUBJECT:ISR / USAC ID number and competitor and Crew Licensing
ID: 14/14-001 | Released: 05-Oct-14 TO:All ISR Racing Affiliates
SUBJECT:Four-stroke classifications
ID: 14/15-002 | Released: 05-Oct-14 TO:All ISR Racing Affiliates
SUBJECT:Four-stroke classifications in Drag Racing
ID: 14/15-003 | Released: 05-Oct-14 TO: All ISR Racing Affiliates
SUBJECT:Four-stroke classifications in Snow Drag Racing
ID: 13/14-024 | Released: 30-Jul-14 TO:All ISR Racing Affiliates
SUBJECT:RACE AND TECH DIRECTORS SCHOOL.
ID: 13/14-023 | Released: 21-Jul-14 TO:ALL ISR Sno Cross /Water Cross Affiliats
SUBJECT:Sno Cross / Watercross Helmets.
ID: 13/14-022 | Released: 25-Jun-14 TO:ALL ISR Drag Racing Affiliates
SUBJECT: Weight Clarification for Pro Mod Classes
ID: 13/14-020 | Released: 07-Mar-14 TO:ISR Sno Cross & Youth Racing Affiliates
SUBJECT:Sealing the engine compartment on Arctic Cat Sno Pro 500 model sleds.
ID: 13/14-019 | Released: 28-Feb-14 TO:ALL ISR Youth Racing Affiliates
SUBJECT:Youth / 120 / Kitty Cat Racing Rules Meeting
ID: 13/14-017 | Released: 26-Feb-14 TO:ALL ISR Sno Cross and Cross Country Affiliates
SUBJECT:Sno Cross and Cross Country Rules Meeting
ID: 13/14-018 | Released: 26-Feb-14 TO:ALL ISR Drag Racing Affiliates
SUBJECT:Drag Racing Rules Meeting
ID: 13/14-016 | Released: 02-Feb-14 TO:ALL ISR Oval / Enduro / Watercross Affiliates
SUBJECT: Oval / Enduro / WaterCross Rules Meeting
ID: 13/14 - 015 | Released: 23-Jan-14 TO:All ISR Racing Drag Racing Affiliates
SUBJECT:Clarification Bulletin - Drag Racing for All - Four Stroke Stock Sleds
ID: 13/14-014 | Released: 16-Jan-14 TO:ALL ISR Affiliates
SUBJECT:2013/14 120/4 Stroke classe Rule Updates
ID: 13/14-001 | Released: 30-Dec-13 TO:Kitty Cat & 120/4 Stroke
SUBJECT:Pro & Semi Pro 206 Replacement Drivers
ID: 13-14-013 | Released: 28-Dec-13 TO:ALL ISR Affiliates
SUBJECT:BRP Preheat Holeshot Switch Replacement
ID: 13/14-011 | Released: 13-Dec-13 TO:ALL ISR Vintage Oval Affiliates
SUBJECT:Approval of changes to the Vintage Super Mod rules
ID: 13/14-010 | Released: 15-Nov-13 TO:ALL ISR Cross Country Affiliates
SUBJECT:2013/14 Cross Country 600 Pro Open Rules.
ID: 13/14-008 | Released: 11-Nov-13 TO:All ISR Affiliates
SUBJECT:2014 600R IQ is a taillight relocation bracket
ID: 13/14-009 | Released: 11-Nov-13 TO:ALL ISR Cross Country Affiliates
SUBJECT:Approved Skis to maintain the legal center to center distance on the Polaris 600R
ID: 13/14-007 | Released: 07-Nov-13 TO:ALL ISR Affiliates
SUBJECT:Every Racer must have an ISR ID number.
ID: 13-14-006 | Released: 30-Oct-13 TO:All ISR Oval Sprint Affiliates
SUBJECT:13-14-006 The ability to trim internal drive lugs
ID: 13-14-005 | Released: 29-Oct-13 TO:All Affiliates
SUBJECT: 4-stroke classifications in snow drag racing
ID: 13/14-004 | Released: 30-Sep-13 TO:All ISR Racing Affiliates
SUBJECT:RACE DIRECTOR AND TECHNICAL DIRECTORS SCHOOL (New Hotel Location)
ID: 13/14-002 | Released: 23-Sep-13 TO:All ISR Racing Affiliates
SUBJECT:Four-stroke classifications
ID: 13/14-003 | Released: 23-Sep-13 TO:All ISR Racing Affiliates
SUBJECT:Four-stroke classifications in Drag Racing
ID: 12/13-011 | Released: 17-Feb-13 TO:ENDURO AFFILIATES, MANUFACTURERS AND SMDG AFFILIATES
SUBJECT:TAIL LIGHTS
ID: 12/13-010 | Released: 14-Jan-13 TO:ALL ISR AFFILIATES
SUBJECT:FUEL TESTING PROCEDURES
ID: 12/13-009 | Released: 26-Dec-12 TO:ALL ISR AFFILIATES
SUBJECT:EQUALIZING THE Y
ID: 12/13-008 | Released: 20-Dec-12 TO:Sno Cross Affiliates, Manufacturers & SMDG
SUBJECT:AIR BOX CLARIFICATION
ID: 12/13-007 | Released: 12-Dec-12 TO:ISR Oval Affiliates, Manufacturers & SMDG
SUBJECT:RULE BOOK CORRECTIONS
ID: 12/13-006 | Released: 30-Nov-12 TO:All ISR Racing Affiliates
SUBJECT:FOUR-STROKE CLASSIFICATIONS IN SNOW DRAG RACING
ID: 12/13-005 | Released: 12-Nov-12 TO:Snow Cross Affiliates, Snowmobile Manufacturers and SMDG
SUBJECT:CARON FIBER AND TITANIUM COMPONENTS
ID: 12/13-004 | Released: 24-Sep-12 TO:All ISR Racing Affiliates
SUBJECT:RACE DIRECTOR AND TECHNICAL DIRECTORS SCHOOL
ID: 12/13-003 | Released: 12-Sep-12 TO:All ISR Racing Affiliates
SUBJECT:Four-stroke classifications in Drag Racing