RENNTECH AIXRO XR50 User Manual

15
TIPS AND TRICKS
8.1
FUEL:OIL RATIO! ! 40:1 (approx. 1.6 oz. per gallon or 25 cc per liter)
FUEL! ! ! ! 93 pump octane
!TIP: using higher-octane racing fuels will not significantly improve engine performance
OPERATING TEMP! ! 150 deg. F
!TIP: use a mix of water and coolant to protect against corrosion and extreme temperatures
ATTN: DO NOT IDLE ENGINE ON STAND OR IN PADDOCK
JETTING! ! ! a change of 1 jet (ex.: 166 - 168) usually makes a difference
CHAIN! ! ! ! loose, approx. 10 mm of play
!TIP: RENNtech recommends Regina 428 O-ring chain
TIRES! ! ! ! 10 - 12 psi
MAX RPM! ! ! 10500 rpm (engine can be over-revved, so watch rpm closely)
ATTN: TACH MUST BE SET TO 2-STROKE SETTING
CLUTCH PLATES! ! should be replaced every 40 - 50 race hours
!TIP: use three (3) clutch weights - bolts and nuts, no washers, recommended
!TIP: pipe is extremely HOT, and may glow red in dim light
!TIP: lube clutch bearings frequently
!TIP: avoid any engine “blueprinting” or modifications to chamber volume - chamber volumes
are already at maximum efficiency, and any mods will result in power loss
ATTN: DO NOT MAKE ADJUSTMENTS TO ENGINE WHILE IT IS ON STAND OR WITHOUT LOAD
ATTN: DO NOT DISABLE VACUUM SOLENOID
ATTN: RUNNING A NON-OEM EXHAUST WILL CHANGE RPM CURVE
ATTN: USE CAUTION WITH NON OEM PARTS; HIGHER RPM WILL SHORTEN ENGINE LIFE
RENNTECH / AIXRO XR50 ENGINE OPERATOR MANUAL

RENNTECH AIXRO XR50 Specifications

General

Brand	RENNTECH
Model	AIXRO XR50
Category	Engine
Language	English