Class technical changes for 2017
Next year’s class technical changes have been announced by the ABkC steering group, including for Honda Cadet and Rotax. In addition it sounds like the proposed Intermediate class is being reconsidered.
The MSA Kart Technical Sub-Committee had mandated a non-return valve in Honda Cadet for 2016 in an effort to prevent any spread of fire on an upturned kart. This was in response to seeing several videos of flash fires from carburettor fuel, with at least one having a temporarily trapped driver. At least one long circuit track already had mandated on this measure, as is common in car and bike formulae. However there are allegations that the non-return valve can cause other problems because of possible pressurisation of the fuel. Another method of achieving the same objective has been proposed and will be tested so the ABkC has recommended to the MSA that the non-return valve regulation in Honda Cadet should be dropped for 2017 and it will.
The Honda GX160 Technical Regulations will omit the T1 engine in the 2017 version so anyone using them must refer to the 2016 regulations.
The only real technical change for Honda will be to allow some minimal skimming of the cylinder head but compliance with the profile gauge and all dimensional criteria still apply. So on most heads no skimming will be possible. This will further the objective of making almost any engine competitive without recourse to specials although there will be some cost involved. The only other change could be to the interface of the exhaust and cylinder head.
As mentioned last news the 125 Open engine regulations are included in the 250 National class in the 2017 Gold Book.
The MSA wishes to rename KZ1 as KZ2 as it is seen that the class we actually run in the Super One is closer to KZ2 than KZ1. The change of title is opposed by the Gearbox group. The class weight Is reduced to 175kg and the choice of tyres is awaited. There are no changes to the Super 4 and club KZ UK class.
Following a review of the consultation on the proposed Intermediate class and because of the age changes and their own ‘Cadet’ class proposals the MSA is re-considering the need for such a class. A proposal to split the current Cadet class with a lighter less powerful version and a slightly heavier more powerful version with the performance balanced so they can race together is back on the table for 2018.
Rotax is bringing in the EVO parts in 2017 as options. MiniMax will only allow the EVO exhaust as an option, but in Junior and Senior all the other parts will be permitted. If the loom is used (and only the newest recently announced version will be permitted) then it must be used in its entirety with the battery, and for seniors the electrically operated exhaust valve. JAG wish to use the D2 (Senior) tyre in Junior Max subject to MSA approval but the current wet tyre will be unchanged in all three classes. Rotax are re-homologating the D2 as a Hard (Option) tyre to allow it to be put forward for junior classes.
TKM have only minimal changes for clarification but Tal-Ko are concerned about some driver’s propensity to have very slow formation laps. The Blue Book says it should be a steady pace, and come up at half race speed.
- This is an extract from the October ABkC Newsletter – please read the original content here