How many classes you can run in a single day is a simple mathematics. The current proposal for a class structure is;
Evo 125, 250 and Open
Pre '85 125, 250 and Open
Pre '90 125, 250 and Open
Under 45
Over 45
Clubman
Intermediate
Expert
Without much/any fuss or bother, Heaven 'always' manages two rounds of:
1. Ladies/Pre-70.
2. Classic 125.
3. Pre-75 250.
4. Pre-75 Open.
5. Pre-78 250.
6. Pre-78 Open.
7. Post-Classic 125.
8. Evo 250.
9. Evo Open.
10. Pre-85 250.
11. Pre-85 Open.
12. Pre-85 only.
13. Four stroke.
14, 15, 16, 17. At least four junior races wedged in the middle.
The juniors get two laps, seniors on older bikes get three laps, the newer bikes get four.
So, two rounds of seventeen races = 34 races. With a (rough) average of three laps per race =
102 laps worth of racing.The proposed Tri-Series format has three rounds of fourteen races = 42 races. If each race is three laps, then you've got
126 laps of racing.
If the format was tweaked to make it two rounds of four laps, then you'd have
112 laps of racing to get through. I also
suspect that this would be faster as you spend less time waiting for the track to be cleared before starting the next race.
(NB: "Laps of racing" is the total number of laps that need to be completed in every race. It has nothing to do with the number of laps any punter would do, unless you entered [and finished] every single race on the day.)
If the whole idea is as poorly supported as some suggest it will be, then I'm sure there will be no drama with combining at least some of the races.