How important are these when running on NSR MC18 on track? My bike (R4J) only had one solenoid, with the other left off when I bought it. I now have an R5K which has both on. Will there be running problems without the second solenoid fitted, and did they vary between R4J and R5K?

Also, has anyone got a good photo or diagram (still struggle with the one on this site) to show how they are all linked up with the carbs...

Thanks

Anyone going to Oulton Park on the 28th September for the 2 stroke group?