Kyosho FO-XX VE 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. Derived is worked out from gear tooth counts the maker publishes rather than printed as a ratio; the notes below say how. Not published means it exists but no source we could find prints it. The top speed is kinematic: an ideal no-load RPM with no slip and no loss under load, so a real car is slower.

In our catalog, half of 1/8 monster trucks run between 12.9:1 and 15.1:1 on stock gearing; this one is 8.7:1. 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

Kyosho's Technical Data gives 'Gear Ratio 8.68:1' and 'Tires (F & R) φ155 x 70.5mm'.

• The spare parts list names a 16T pinion (97044-16, 'Pinion Gear (16T/1.0M/φ5.0)') and a 42T spur (TR41-42), and the axle diffs use a 13T drive bevel (IF21) and 43T ring gear (IF106).
• That puts the ratio after the spur at 43/13 = 3.31, and 42/16 x 3.31 = 8.68, matching Kyosho's figure.
• The motor is the KYOSHO SPEED HOUSE TORX 8 at 2000KV (70601).
• The BRAINZ 8 ESC (82247) is rated for 2 to 4 cell LiPo, and the car takes two packs side by side (7.2V NiMH or 7.4V LiPo each) with Super Plug connectors.
• The maintenance manual fills the front and rear diffs with #3000 silicone oil.
• Kyosho's current parts listing for this SKU gives the spur as TR41-42B 'Spur Gear (42T/MAD Series)'.
• Kyosho lists this Readyset as discontinued (sale date July 2019).

Documents

• ManualMaintenance manual, FO-XX VE 2.0 (Kyosho PDF) (opens in a new tab)Diff oil p. 5
• Exploded viewExploded view, FO-XX VE 2.0 (Kyosho PDF) (opens in a new tab)
• Parts listSpare and option parts list, FO-XX VE 2.0 (Kyosho PDF) (opens in a new tab)TR41-42 p. 1, 97044-16 p. 2

Sources

• 34255rc.kyosho.com (opens in a new tab)
• Manual (PDF)kyosho.com (opens in a new tab)
• 1rc.kyosho.com (opens in a new tab)
• 97044-16rc.kyosho.com (opens in a new tab)
• 70601rc.kyosho.com (opens in a new tab)
• 82247rc.kyosho.com (opens in a new tab)
• Manual (PDF)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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