Assembly Procedures; Cooling System; Engine Assembly - RENNTECH AIXRO XR50 Operator's Manual

4

ASSEMBLY PROCEDURES

3.1

COOLING SYSTEM

The XR50 is a liquid-cooled motor that uses an external water pump driven by the rear axle to
cycle water and coolant through the radiator. The radiator and cooling systems can be installed
on the left side of the kart without strain or stress on the chassis.
Water hoses should be free of any sharp bends or kinks, and run from the bottom connector on
the radiator to the central connector of the water pump (inlet). The hose should lead from the
pump outlet to the front engine connection. The engine's water exit (next to the exhaust mani-
fold) takes up the hose leading back to the radiator. (see pg. 5)
The cooling system should be filled with a mix of water and coolant.
Routine checks should be made to ensure tightness*. Route the return hose in a sufficient dis-
tance from the exhaust pipe. Check that there are no sharp bends in the hose connections and
that the hoses do not touch any rotating parts.
Fasten all hose connections with hose clips while allowing suffecient movement
Should insert a water temp during this installation
!TIP: a small amount of antifreeze prevents corrosion.
!TIP: place water temperature sensor as close as possible to the exhaust port, or (ideal) directly
into engine housing.
3.2

ENGINE ASSEMBLY

Assemble the engine mount (torque to 26 Nm).
Remove the clutch cover.
!TIP: place the engine on the chassis and align the chain / sprockets.
ATTN: DO NOT DISABLE VACUUM SOLENOID
RENNTECH / AIXRO XR50 ENGINE OPERATOR MANUAL