© Aixro GmbH / Woelfle Engineering GmbH
20/23
9. TUNING
9.1. Driving in Rain
No changes to the engine are necessary to run it in wet conditions. You should just cover the
air filter, so it does not take up too much water. Also please note that the clutch can overheat
more easily.
9.2. Clutch Adjustment
The clutch is a centrifugal racing clutch with 6 weight levers. As the engine speed increases,
the levers spread and increase the force on the friction discs until the clutch drags and then
fully engages. In its standard configuration the clutch is set to quick engagement at low en-
gine speed. To ensure a long clutch life, please just leave the clutch as is, i.e. with screws in
all 6 balance weights and the pre-load screws set to a height of 9mm.
! Modifications of the clutch setting can lead to very quick overheating of the clutch.
! Note that no warranty can be claimed for an overheated clutch. This is even the case
when the clutch is run in its standard setting, because overheating can be caused by
driving mistakes (driving constantly at low speed, accelerating and braking at the
same time, etc.).
9.3. Carburettor Adjustment
It is not a problem to run the Aixro XR50 with a rich jetting, and standard jetting of the carbu-
rettor works well under most conditions. If you should want to try jetting modifications, you
should be very careful. Below you can see the standard settings of the carburettors available:
9.3.1.
Aixro YSN PWK30
main jet:
145 (135 with power jet version)
needle:
PW30, clip in highest or second-highest position
vent screw:
opened 1½ turn
slide screw:
3 turns / 2mm from BDC of the slide
air filter:
Aixro red
9.3.2.
Dell’Orto VHSH30W
main jet:
type 6413 M6 158
idle jet:
type 12995 M5 55
choke jet:
45
needle:
K27
needle jet:
DQ 265
vent screw:
opened ¼..½ turn
slide screw:
2½ turn from BDC of the slide
air filter:
Aixro red
! A lean condition can lead to total loss of the engine.
! Never use an air duct to the inlet or a karting airbox around the carburettor filter. This
can even lead to engine damage if the jetting is on the rich side, because the engine
may run too lean at high engine speed.
Содержание XR50
Страница 1: ...OPERATION MANUAL...
