The keen-eyed among you might have noticed that the Honda GX160 Technical Regulations have been updated from Version 12 to Version 13A, and there is a bit of a story around that. It is not unusual to update regulations, as little things change around the manufacture of the unit, or perhaps what some engine preparers have found or suggested. So it was that Version 13 was formulated, approved by the ABkC and then the MSA during 2017.
Fly in the ointment!
An exclusion in a Super 1 round in June last year at Clay Pigeon led to a lengthy legal battle between myself (and another Technical Commissioner, Paul Klaassen) and the excluded drivers via their high-profile barrister. This wasn’t resolved until the middle of November, and it prompted a quick re-draw of certain aspects of the regulations to reflect some of the implications and repercussions of the outcome of the hearing at National Court. By the time this had all been completed and the necessary approvals sought, you might notice that Version 13A did not come into force until 31st March 2018.
Version 13 and Version 13A only add more explicit detail of how ignition timing should be correctly measured and interpreted
The changes between Version 13 and Version 13A only add more explicit detail of how ignition timing should be correctly measured and interpreted, there is no change to the ignition timing itself, and there is no reason at all why you, as a customer of an engine preparer, should have any concerns, for they are all aware and indeed had a hand in the re-writing process. If you prepare your engines yourself, it might be worth you having a look at the updated regulations, just to re-assure yourself that you are setting the ignition timing in the same method as intended and described in the regulations.