Two-stroke bikes will remain in the MX2 class for motocross competitions on both sides of the Tasman.

Motorcycling New Zealand recently decided that 250cc two-strokes and 250cc four-strokes will be raced side-by-side in the MX2 class in 2015 and now Australia is following the example.

Across the Tasman, Williams Event Management (WEM) and Motorcycling Australia (MA) discussed 250cc two-stroke compliance for the MX2 and MX Development (Under-19) classes in the Australian Motocross Championships 2015.

After much consultation, it was decided the 250 two-strokes will return to the MX2 and MXD classes next year, but with a number of new regulations set on the machines.

There have been some noted concerns about parity, and the WEM group staff have worked together with the Motorcycling Australia motocross commission to make adjustments.

For the 2015 Australian Motocross Championships, the following will be put in place as reflected in the series Supplementary Regulation.

• The 250cc two-strokes will be eligible with certain restrictions.

• The bike must remain in stock trim from the intake manifold to the exhaust port, and all engine parts between those two points and must be OEM for that year model.

• Intake manifold from the rubber boot where the carburetors clamp is and there is no porting or headwork allowed.

• For those looking to change swish an extra base gasket will be allowed.

• There are no restrictions on pipes or mufflers other than the fact that they must meet the Noise rules.

• An MA technical representative will be checking engines across the series, and MA will have a head barrel and piston from each manufacturer to compare with.

• Any bikes, found to be modified will be excluded from the results of the day’s competition.

© Photos by Andy McGechan, www.BikesportNZ.com

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