Kyosho LA403 Center Diff Gear Set compatible with LAZER ZX7.5  [KY-LA403]

Kyosho LA403 - Center Diff. Gear Set (ZX7.5)
Price:
NZD$79.42
Brand:
Kyosho
Model:
KY-LA403
GTIN:
4548565524020
Condition:
Brand New
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Overview of the center diff gear on ZX7.5

The Kyosho LA403 Center Diff. Gear Set is manufactured as an RC replacement item intended for the LAZER ZX7.5 chassis. The following notes describe its drivetrain function, where it fits into service routines, and general installation points for hobbyists.

In operation the center differential gear set transmits torque between front and rear outputs, influencing traction split and vehicle response. During maintenance of the LAZER ZX7.5, installing a fresh center diff gear set is common when you find excessive backlash, grinding sounds, or when reestablishing correct drivetrain performance after extensive use.

Installation pointers are kept broad to account for tool and chassis variance: ensure the gear stack is oriented correctly, confirm proper gear mesh with the pinion and spur, and inspect adjacent bearings and spacers for wear before final assembly. Measure gear mesh and avoid clamping screws so tightly that differential bearings are preloaded.

As a tuning element, changing center diff gears or altering the differential build (shims, oil, or clutch elements where applicable) modifies front-to-rear torque bias and transient characteristics. Consider the LA403 as a like-for-like replacement that supports precise differential setup rather than a bolt-on performance enhancer.

Compatible Models

  • LAZER ZX7.5
Remark :
Due to limited stock availability, please notice that some Kyosho items may have to order from the factory and the ready time is around 4-6 weeks. Customer purchases the item is assumed to accept the waiting time which allows us to order directly from the manufacturer if the item is out of our warehouse.

Does the LA403 change how I should set differential oil and shims?

The LA403 is a direct replacement gear set; oil weight and shim stacks remain the primary tools for tuning differential behavior and should be adjusted independently of the gear swap.

Are there common fitment issues to watch for?

Common items to check are correct spacer locations, bearing endplay, and that gear teeth engage cleanly with the pinion and spur. Address worn bearings or mispositioned spacers before final assembly.

Should I expect immediate handling differences after replacement?

Replacing the gear set typically returns the drivetrain to its designed condition. Observable handling changes are usually the result of subsequent differential tuning rather than the gear set swap alone.

How should I break in the new gears?

After installation, run the model at low speed and low load to verify quiet operation and correct mesh. Recheck gear mesh and fastener torque after an initial short test run.

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