Gaday bigtoe
Yes,
you can nominate to race your 4 stroke in its normal bike class ( eg evo, pre 85 or pre 75 ).
Depending on the number of 4 strokes that are nominated on the day, and as per gsr's, then there will be a individual 4 stroke race. This is what normaly happens at our qvmx race days.
The seperate 4 stroke race, will be decided on the saturday once bike numbers have been finalised.
Hope this helps you.