Class, Ability Levels

13.2.3 SOUND: Silencers are required; no machine may compete with an open exhaust system. 13.2.4 No major components may be later than 1974 (specifically, engine, frame, gearbox, fork, and hubs). Only Modern Classic may use components later than 1974 (but limited to pre-1980). Hydraulically-assisted brakes and clutches are prohibited. 13.2.5 All motorcycles must comply with all applicable AHRMA competition and safety rules, including rule 3.2.6 (AHRMAdecals), 3.3.8 (operating brakes) and 11.2d (handlebar-mounted kill switch). Fuel shall be gasoline only; maximum 115 octane [using formula (R+M)/2]. 13.2.6 ALL MODIFICATIONS MUST BE CONSISTENT WITH THE SPIRIT OF THE CLASS. Period modifications have been extensively documented and machines with obvious non-period or excessive modifications will be disqualified or required to compete in the next-higher-level class. Two-strokes in Classic classes must have piston-port induction; reed valves will be permitted if it was a factory modification by a recognized service agent in the same production series for such motorcycle. 125cc and smaller would also be exempt are not legal. Only round-slide carburetors may be used (see 11.2.c) 13.2.7 When entering a “special” constructed from various pre-1974 components of different classes and eras, the machine must be entered in the latest class that either the chassis or the engine dictates. Example: Triumph Cub engine in a fivespeed Bultaco frame rides in the Modern Classic class. Otter-type chassis are not allowed in Premier and must run in Classic or Modern Classic. 13.2.8 NUMBER PLATES: a) All machines must have a front number plate with a white background at least 5x5-inches with a black number or letters at least three inches tall, indicating the line that will be ridden. b) In an instance where two riders competing on different lines are sharing one machine, it is each rider’s responsibility to notify the Observer which line is being attempted. 13.2.9 The rider, not the motorcycle, is the entry. A rider may switch to another motorcycle at any time during the event, provided the second machine is eligible for the class in which the rider is entered.

13.3 CLASS AND ABILITY LEVELS

The sections of an AHRMA trial course are divided into various “lines” of difficulty as follows: a) The number-four line is extremely simple and, except for Girder Fork and Rigid

Novice competitors, is intended only for entry-level riders. If only three lines are used, number-four riders will ride the number-three line. b) The riders in the Beginner class using the number-four line may compete on any

AHRMA-legal machine and will be scored together in one class. c) A rider’s ability level is shown on his/her AHRMA membership card. A change in a rider’s ability level must be done with the approval of the AHRMA National office and the change will be indicated on the rider’sAHRMAmembership card.

d) Riders may be asked to advance in ability level by the AHRMA Trials Rules &

Eligibility Committee or an AHRMA-recognized grading committee. A rider may advance in ability levels at his/her own discretion (see (f) below), but must receive permission from the grading committee to move down in ability level if the committee’s evaluation concludes that the rider would be better suited at that lower level. e) A rider may only enter one class per day. f) A rider will ride for an entire calendar year at the ability level as shown on his/ her AHRMA membership card, with the following exception: A rider may temporarily ride an ability level higher than indicated on the membership card if: 1. The rider declares the intention to move up at registration 2. The rider rides no more than the total number of events that equal the number of rounds needed to qualify for national championship points, minus one.

Example: If four rounds are needed to qualify for national points, then the rider may ride three rounds without permanently advancing his/her ability level. If the rider does permanently move up in ability level, the rounds ridden before formally moving up will then count toward National championship points. g) Members of the AHRMA Trials Rules & Eligibility Committee shall make up the trials grading committee. h) Typically, a Trialmaster will lay-out four separate “lines” within each section, marked 1, 2, 3 or 4, to correspond with the number on each rider’s number plate.

Some Trialmasters may elect to designate a separate PI line within the sections.

When utilizing the four-line format, PI riders will ride either the 2 or the 3 line, at the discretion of the Trialmaster. In this instance, the Section Begins card is to be marked “PI=2” or “PI=3.” Likewise, riders with EX on their number plates will find “EX=1” or “EX=2” on the Section Begins card. i) A number 4-line shall always be made available for Beginners at both National and Regional trials events.