im not sure but i thought they were at 850..
7. The IJSBA has voted to allow Two Stoke Normally Aspirated Ski Class PWC to increase their displacement size to a maximum of 850cc in all of the Ski Open Classes.
The IJSBA has determined that Two Stroke Ski Class PWC have further untapped performance ability than that which competitors are currently able to utilize. In research conducted by the IJSBA along with OEM manufacturers, engine builders, racers, and aftermarket accessory manufacturers, it has been concluded that currently employed Two Stroke Ski Class PWC can gain performance improvements by increasing displacement up to 850cc with the OEM cylinders. Research concluded that, after 850cc, the higher displacements would produce negative returns.
The IJSBA observed that Four Stroke Ski Class PWC made significant gains in performance improvement from 2005 to 2006 within the existing CC allotment. Therefore, there is not a demonstrated need to increase CC allowances for any other Ski Class PWC than two stroke models. The IJSBA reserves the right to make a mid season update by possibly allowing Stock Class and Limited Class Ski models to exercise displacement increases. Competitors should not take this as a hint that the IJSBA will do so, only that we reserve the right to do so if it is determined that our efforts to unleash potential performance in the PWC which need it were needed in more classes.
