© Aixro GmbH / Woelfle Engineering GmbH
5/23
4. ASSEMBLY
4.1. Cooling System
The XR50 uses a standard karting radiator and a conventional water pump, which is driven
by the rear axle, as well as standard karting water hoses.
1.
Place the engine on your kart without bolting it down. This makes it easier to access
the water connections.
2.
Mount the radiator without strain (usually on the left side of the kart). The radiator
should be mounted vertically enough to allow sufficient air flow through the system.
3.
Connect one water hose at the lower connection of the radiator and the centre connec-
tion of the water pump.
4.
Connect the radial connection of the pump with the lower connection at the front of the
engine with another hose.
5.
Connect a third hose at the water connection on the backside of the engine (next to the
exhaust manifold) and the top of the radiator.
6.
Fasten all connections with proper hose clamps.
! Ensure that the hoses are positioned far enough away from the exhaust to avoid melt-
ing or cooking, and secure them with tie wraps if necessary.
! Make sure that there are no kinks or sharp bends in the hoses, and that they do not
touch any moving parts or the ground.
! Note the rotation direction of the water pump.
4.2. Engine Mounting and Chain Tension
The XR50 is supplied with standard engine mounts, which fit most karts (Ø32mm x 92mm).
Engine mounts for different tube distances or diameters are available upon request. Only use
highest-quality chains and one-piece sprockets, type 428.
! Be sure that your engine mounts and clamps have the right dimensions. Otherwise
you may damage your kart and the engine.
1.
Install the engine mounts if they are not yet assembled to the engine (usually ship in-
stalled; 4 countersunk screws M8x25 at 26Nm).
2.
Remove the clutch cover (4 Allen screws
– 1x M6x20, 3x M6x10 – note the positions of
the screws), and mount the engine on the chassis.
3.
Choose a suitable sprocket for your race track, and bolt it to the sprocket carrier.
4.
Attach the engine to the kart with matching engine clamps.
5.
Adjust the alignment between the front (clutch) and rear sprocket by moving the
sprocket carrier. Use a straight edge or alignment checking device as your guide.
6.
Generally the engine should be positioned as close as possible to the rear axle to
achieve a short chain length. Therefore release the engine clamps again, (if applicable)
screw the engine support screw, which is attached to the chassis, as far to the rear
axle as possible, and put a preferably short chain around the sprockets.
7.
Position the engine, so the chain has approx. 5mm
“slack”, and tighten the engine
clamps.
8.
After tightening the clamps the chain tension should be checked at different positions of
the rear axle. The chain must not be completely tight, but has to remain movable.
9.
Now (if applicable) tighten the engine support screw, and re-attach the clutch cover
10. Install a standard chain guard (splash guard for the chain lubricant).
! Over-tightening the chain and worn components can build up heat. This significantly
reduces the life expectancy of the clutch, especially the friction discs and the clutch
bearing.
! A too loose or too long chain (chain slack >10mm) can also wear components.
! O-ring chains only run smoothly in use. Until an O-ring chain heats up, the load on the
clutch is higher. Therefore never use an O-ring chain with a 10T drive sprocket.
Содержание XR50
Страница 1: ...OPERATION MANUAL...
