Kyosho FO-XX 2.0 Readyset

Stock is as the vehicle ships. Calculated is worked from the stock figures on this page rather than stored beside them, so the two cannot drift apart. Not applicable means the vehicle does not come with it, like the motor on a roller or the tires on a race kit, or does not have one, like a KV rating on a brushed motor. Not published means it exists but no source we could find prints it.

In our catalog, half of 1/8 monster trucks run between 12.9:1 and 15.1:1 on stock gearing; this one is 15.6:1. What's a normal final drive for your RC?

Gearing parts

Tooth counts are the ones in the specifications above. Pitch is given as metric module (Mod 1, Mod 0.8) or diametral pitch (32P, 48P). They are different standards and are not interchangeable, even where the numbers look close. Bore is the pinion’s hole, listed separately from the motor shaft. Linked part numbers go to the maker's or official distributor's page for that part.

Buying a new pinion or spur? Check what’s fitted first: Why your RC's gear specs might not add up

How these numbers were settled

The nitro FO-XX 2.0 runs a KE25SP engine through a 3-speed automatic transmission, and Kyosho's Technical Data gives 'Gear Ratio 25.7/19.8/15.6:1'.

• The top-gear total, 15.6:1, is shown here; first gear is 25.7:1 and second 19.8:1.
• The tire is 'φ155 x 70.5mm', the same as the electric FO-XX VE 2.0.
• The drive runs from the clutch bells (MA011E, for 3-speed) to the 3-speed spur gear (MA008), then by an 11T sprocket (MA010B) and chain to the 13T/43T axle bevels, but Kyosho does not publish the clutch bell or spur tooth counts, so the pinion, spur and ratio after the spur are left blank.
• The maintenance manual fills the front and rear diffs with #3000 silicone oil.
• Kyosho lists this Readyset as discontinued (sale date July 2019).

Documents

• ManualInstruction manual, FO-XX 2.0 (Kyosho PDF) (opens in a new tab)
• ManualMaintenance manual, FO-XX 2.0 (Kyosho PDF) (opens in a new tab)Diff oil p. 5
• Exploded viewExploded view, FO-XX 2.0 (Kyosho PDF) (opens in a new tab)
• Parts listSpare and option parts list, FO-XX 2.0 (Kyosho PDF) (opens in a new tab)

Sources

• 33154rc.kyosho.com (opens in a new tab)
• Manual (PDF)kyosho.com (opens in a new tab)
• 1rc.kyosho.com (opens in a new tab)
• Manual (PDF)kyosho.com (opens in a new tab)
• ma011erc.kyosho.com (opens in a new tab)
• ma008rc.kyosho.com (opens in a new tab)

Every figure on this page traces to one of these. Where they disagreed, the note above says which was used and why.

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