Well the old o-ring is shot so its definately a new ring minimum, I will also get some Devcon-F and see how it goes.
If not my other options for a week friday are (in order of preference):-
1. Fit MC18 barrels, but I would probably also need to change to 030 card, change to unleaded and rejet the RS carbs as best I can...any ideas on where to start with the PJ38's?
2. Take the standard MC28 fortuna bike with the trackbike bodywork, but it will get left for dead down the straights.
3. Take the RGV250 and get left for dead everywhere!
4. Take the 500 and hope it holds together for the day as its not really been run in any anger yet.