set throttle trim on radio to neutral before setting idle

ball bearings

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Fits HPI Trophy Truggy 4

Hpi Racing 110612 Crankcase Summit Parts set throttle trim on radioHpi Racing 110612 Crankcase This is a genuine HPI Racing replacement crankcase for compatible HPI nitro engines. The crankcase is the foundation of the engine, holding the crankshaft bearings in precise alignment and sealing the bottom end. A worn or damaged case causes air leaks and vibration that make an engine impossible to tune, so this factory replacement is the right basis for a full rebuild of a well used powerplant. Genuine HPI Racing