Joyner Dirt Devil SZ250DS 2006 Owner's Manual And Parts Manual page 21

B. Engine Lubrication
You must change the oil in the crankcase after the first 5 hours of operating of your new
engine (See Fig. 9) and after 10 hours of use thereafter. That will insure proper
lubrication of internal parts and prevent costly repairs due to excessive wear.
a. Remove fill plug located on rear side of
engine. Tip kart backwards slightly by
blocking up the front end and drain oil into
suitable container.
b. Replace fill plug and tighten securely.
Place kart in a level position.
c. Refill crankcase (approximately 1000
ml) to top of filler neck with SAE 10W/30 oil.
Use same grade of oil as used originally.
d. Check oil level before each use of kart
or after each 10 hours of operation. Add oil
to bring up to proper lever. Do not mix
various grades of oil.
Figure 8
C. Engine Coolant
You should check the coolant for lack. If lack, you need to refill coolant into the radiator
(approximately 1800 ml) or reserve coolant. The lack of coolant will cause engine
overheat. This can cause engine damage.