MSD Blaster FI for Yamaha YFZ450

PN 4247

WARNING: When installing the Blaster FI, disconnect the battery cables. When disconnecting,

always remove the negative cable first and re-install it last.

Parts Included:

1 - Blaster FI Controller 1 - MSDView CD

1 - Micro-USB Cable 1 - Mounting Bracket

Figure 1 Bracket Install.

Figure 2 Hook Bracket and Velcro Install.

Note: Do not plug the MSD into PC until the MSDView

Software has been installed first.

INSTALLATION

1. Remove seat by pulling seat lock lever upward and

pull the seat up at the rear.

2. Remove the air box case cover. Note: Do not

remove the air filter. Never operate the engine

without the air filter. Engine damage can occur.

3. Remove the rear fender by unbolting the four bolts

and clips on the fender.

BRACKET INSTALLATION

1. Pull tail/brake light cover down and unhook it from

the back end (Figure 1).

2. Locate the OEM ECU at the rear of the ATV and

disconnect the 34-pin connector.

3. Separate ECU connector pigtail from the rest of

the bundle so it can be pulled approximately 4-5

inches back. Route it into the ATV frame to reach

inside the air box.

4. Slide bracket wings under the fender tabs. Adhere

the supplied Velcro to the grooves on the bracket.

(Figure 2).

Note: The MSD Blaster Enhancer is designed for the Yamaha YFZ450 with electronic fuel injectin.

WARNING: The Blaster FI Controller is a performance device that allows the vehicle or engine to operate

at increased power and speed. Follow all OEM safety recommendations and use extra

care when operating at increased power and speed.

CAUTION: The Blaster FI Controller will raise the maximum rev/speed limit of the engine. Note

that factory components may not be designed for the increase in rpm and may require

modifications to achieve the best performance and durability.