321 Water Outlet Rule Clarification

[guedo499]

Looking at the 302 rules, the Water Outlet has a measurement of .315, which measures correctly. But on the 321, the Water Outlet is a different size hole - much smaller. What is the correct measurement on the 321?

Thank you, John.

[HydroKyle93R]

The holes on the back of the tower are for exhaust.

[guedo499]

I would agree with that; however, the spec sheet refers to it as a "water outlet". No diagram, other than the one shown, is given.

[GrandpaRacer]

Those holes are for easy starting when the tower is half full of water. Exhaust relief holes I think they are called. I always wondered what that water outlet spec referred too, it is totally unclear in the spec.

[Racerkyle20]

Have you emailed or called your commissioner? TJ? or Ricky? Those would probably be the best guys to answer the question.

[Lee Sutter]

Ask them if we can use the 14mm 302 heads too. It would lower the spark plug cost and increase available heat options.

[65R]

according to tech manual both heads are legal