User manual YS FZ110S

[. . . ] Synthetic or castor oil can be used, or a combination of synthetic and caster. The needle valve should be set so that the engine is running at a rich setting. It is advisable to always use a slightly rich setting to keep the moving parts lubricated, even after the break-in period. FIG 2 TAPPET CLEARANCE ADJUSTMENT 1. [. . . ] When reinstalling the cam gear, the side with a point mark should be facing the opening of the gear box. Note that it should also be mounted with the point mark located towards the top of the engine just below the cam followers. Gasoline and other volatile solutions will damage the silicone if used. FEATURES The FZ110S is the most powerful 110 four cycle engine available. This engine offers many exclusive features that have been proven on other YS engines. Supercharged system with simplified structure to keep weight to a minimum while still retaining maximum efficiency. Air chamber that uses crankcase pressure coupled with a double throttle valve system which allows a bigger charge of fuel and air mixture to enter the intake valve for more power. This system is unaffected by tank position or by the attitude of the model. PROPELLER INSTALLATION Due to the high torque of the FZ110S engine, we have equipped it with double locknuts for safety. Select a good quality propeller that will turn in the 8, 000 to 11, 000 rpm range. We recommend sizes 14x11-12, 15x10-11. LOW SPEED ADJUSTMENT This engine is equipped with a low speed needle valve to adjust the mixture from low to mid throttle. This needle valve is located on the side of the throttle barrel opposite the throttle arm ( FIG. 1). The low speed needle valve should be set after the high speed needle valve has been adjusted. Let it idle for 20 to 30 seconds and then slowly advance the throttle. The adjustment is satisfactory at low speed if transition is smooth at this time. If the engine is running rough on idle, the low speed mixture is rich. If the engine starts to speed up and dies on idle or starts to detonate, when advancing the throttle, the mixture is lean. Turn the low speed needle valve clockwise to richen and counterclockwise for a leaner mixture (note that the direction of the low speed needle valve is opposite the high speed needle valve). Adjustments to the low speed needle valve should be 1/8 to 1/4 of a turn increment at a time to achieve smooth throttle response. START-UP 1. Remove tube(B) from the filter, remove tube(A) from the check valve, then fill the tank. [. . . ] Should the engine be modified, incorrectly assembled or abused, there will be a nomal charge for parts and labor. The use of four cycle fuel due to the low oil content will also void warranty. INSTALLATION 1. Since high pressure is applied to the tank, tighten all connections carefully. [. . . ]