AMA Pro Racing have released a complete rulebook for the 2016 Pro Flat Track series, with changes focused on clarifying equipment standards for Twins and Singles machines. There are revisions which address tire testing procedures as well, clearly a response to the controversy stirred up by alleged tire tampering at the 2015 Du Quoin Mile. Also, the new rulebook calls out a number of coming standards expected for the 2017 season.
Competitors in the GNC1 class will still use Twins at all Mile and Half-Mile events and Singles on Short Track and TT circuits in 2016. In GNC2, Singles are the primary machines for Short Track, TT and Half-Mile races while Twins will be used at the Miles. The coming changes to the classes in 2017 will see all GNC1 events raced aboard Twins and all GNC2 events raced on Singles. Technical regulations for Twins and Singles are the same both GNC1 and GNC2 in 2016.
The AMA will allow race-only Twin engines from any manufacturer upon approval in 2016. Teams will have the option of using engines ranging from 550cc to 1250cc in the Twins class, which can be modified to “achieve the class displacement limit by modifying the bore and stroke.” Race-only engines can’t exceed 750cc though, with “a maximum allowable overbore of 0.045” per cylinder.” Specifications have been made regarding a host of mechanical elements which can be modified, from the crankshaft, intake and exhaust ports, clutch basket, pistons and more. Click here to view the full text provided by the AMA. The minimum weight for all Twins displacements is down to 300 pounds from 310 in 2015.
Only Dunlop DT3 tires will be allowed in AMA Pro Flat Track competition, doing away with the Dunlop/Goodyear DT11s used in 2015. Competitors will have the option to fit a belly pan to their motorcycles for fluid containment in the event of engine failure, a regulation that will be mandatory in 2017.
The forks on Twins machines can make use of any commercially available inner and outer fork tubes and modifications are permitted. Out back, single or dual shocks are permitted as are linkages. The engine mount location, steering head, swingarm pivot point, and rear suspension pick-up are not regulated, nor are handlebars, hand controls or cables.
In the Singles realm, rules remain largely unchanged. There remains no minimum weight limit in 2016, but in 2017 a 235-pound minimum will be imposed. Back-torque limiting clutches will be encouraged but not mandatory in 2016, but will be required in 2017.
Another measure that’s called out in the 2016 rule book in anticipation of 2017 pertains to the brands of motorcycles used by competitors. If a racer has a different brand of motorcycle as a back-up bike, he or she must notify AMA Pro Tech Staff in the staging area prior to entering the race track. But in 2017, riders will be required to have the same brand of machine as their primary and back-up bikes. All Twins racers will be required to wear leather suits in 2016 and are encouraged to use the same protective gear in Singles events as well, a measure that will be mandatory in 2017.
There’s a new Appendix included in the rule book specifying Tire Testing Procedures. Testing may occur to any of the tires used by the top-five finishers at the discretion of AMA Pro officials. Four, 1-2 inch samples will be taken from the tread of the tire, placed into a vial by the competitor, then sealed and signed by the competitor before being shipped to Blue Ridge Laboratory. It will be the witnessing AMA Pro official’s responsibility to send the samples to the lab, where Blue Ridge will test samples against the manufacturer’s provided sample. Tire testing can be requested by any rider participating in the event via a written protest submitted to AMA Pro “within 30 minutes of the first bike in the event arriving in the tech tent.” Protests may only be lodged against bikes finishing the main event. Riders protesting for a test must also pay $1000 cash per tire being protested, a payment that will only be returned if the tire fails in the test. If a tire is found in violation of AMA Pro benchmarks, the competitor will be disqualified.
Additionally, AMA Pro has announced the 2016 AMA Pro Flat Track Advisory Group, consisting of:
In a press release the AMA states that “AMA Pro will organize regular meetings and administer the agenda. The meetings will kick off in March, with the first scheduled to be held during Bike Week in Daytona. Following the initial meeting, there will be 3-5 further meetings, in conjunction with GNC races, during the rest of the season. Members of the Advisory Group are required to attend all meetings.”
For the full, red-lined version of the latest AMA Pro Flat Track rule book, follow this link.