ESE's works engine tuner

[Flettner]

Yep....... certainly would in F4.

Good, wouldn't want to go to all that effort for nothing, thankyou.

[koba]

Good, wouldn't want to go to all that effort for nothing, thankyou.

My advice is to check the rules and read through them all.

This one might not be compatible with a completely freshly designed engine:

1.a Engines must be derived from non-competition motorcycles. Motocross, Road Racing, Enduro and Kart motors and
transmission parts are not permitted. There shall be no restriction on the make, type or design of carburettor, ignition,
exhaust, piston, cam, valve springs or cooling system except for class eligibility.

The rules can be found here:

https://mnz.co.nz

Appendix W is the current Miniture Road Race (Bucket) rules, but others are also relevant.
Also, speak to organisers; it's a lot easier to work it out before the project and build accordingly than to show up on race day with a bunch of conflict and disappointment.

[wobbly]

The component parts can be anything not manufactured for a race machine, ie those scooter/ small bike cylinders /cranks etc.
OR - completely home made, designed, built parts, even if they are commercially manufactured using sintered laser technology from the CAD files.

[F5 Dave]

Well you could throw a CX500 crankcase in the melt pot which does two things. Make it derived from a roax engine. And gets another maggot off the road so it doesn't become a sad cafe racer.

[Flettner]

If I go to this effort I fully expect to be able to enter it.
Used to be, if it was home made, it was acceptable.
This will be completely home made, and or, none competitive parts.
Actually I (we) will start with a single cylinder, because I have a version of that under construction now, but 125, for Hustler class.
E10 is acceptable also I see. Designed so we can have both a 100 and a 125cc version.