Lazer ZX7.5 Rear Upper Bulk Mount LA412 Compatible Part by Kyosho  [KY-LA412]

Rear upper bulkhead replacement for Lazer ZX7.5

The LA412 rear upper bulk is an RC replacement item designed for the Lazer ZX7.5 chassis and supplied as Kyosho part LA412. It locates the rear suspension arms and secures the link attachment points on the rear section of the chassis.

Compatibility revolves around the Lazer ZX7.5 configuration, where correct fit and alignment affect predictable wheel movement. This part swaps in for the original upper rear bulk to recover proper geometry if the factory piece has worn or been damaged.

Installation is a routine hobby procedure: remove the rear mounts and any associated fasteners, take out the existing bulkhead, fit the LA412 into position, confirm link geometry and reinstall hardware with care to avoid thread damage. Inspect adjacent mounting areas after your first run to ensure everything remains tight.

Tuning notes: the rear upper bulk sets the upper link locations and influences roll-center and camber behaviour. A solid replacement keeps geometry consistent, making incremental link adjustments more repeatable in tuning sessions.

Use LA412 when restoring correct rear suspension geometry or replacing a broken bulkhead to maintain reliable chassis balance and tuning response.