BMax4 111 - pinion size

[toooldskool]

what size pinion would be suitable for a 8.5T Speed Passion motor, e.g at Kiddy on Astro?

[skyaflake]

Try a 22 and go from there.

[mes]

Is that a B-Max2 ver.3 or a B-Max4 III? In case it is the 2WD car I'd say use a 25t together with the 80t spur gear that comes in the kit. IIRC Yokomo included a 25t pinion with the original B-Max2 and recommended it for a 7.5 turn motor. It worked pretty well on any kind of track in mine back in the day paired with a Thunder Power 8.5.

[toooldskool]

sorry, i should have said , BMax 4

[PJC]

What size spur are you using? 84?

[toooldskool]

Yes 84