Download Tornado or Hurricane Installation: Use instructions included with the adaptor for your bike and install the adaptor first. With your adaptor installed now attach the Hurricane – Tornado adaptor plate using the (2) – m6-1 x 16 flat socket head cap screws. Now use the (3) ¼ -20 X ½” chrome socket heads to bolt on the air kit. Please note that the Tornado filter is very snug. Filter should be at room temperature or warmer. The rubber does not expand when cold. Apply Windex or similar to Tunnel and inside of filter flange. Be careful when putting filter on so not to wrinkle pleats. It is recommended that you hold filter light but firm, at large end with flange. Read First 1) Remove Seat 2) Remove fuel tank. a. Remove 12mm bolt at base of tank. b. Turn petcock off and disconnect the fuel line. c. Slide tank back and disconnect the two green electrical connectors. 3) Remove stock air cleaner cover and filter. 4) Loosen 3 Philips screws and remove 1 – 10 mm bolt inside the stock air box. 5) Lift air box from bottom to remove and disconnect hoses and idle knob. 6) Jet the carburetor per the instructions in the jet kit. (Dyno Jet Needle 4TH Clip from the top, and use the provided 210 MJ) 7) Insert 3/8″ red plug into the large hose under the carburetor. 8) Install the new Thunder adaptor using the 3 – 5mm socket head cap screws furnished in the kit. Make sure to keep the small hose to the left of the adaptor bracket, and then attach to the crank case breather with the dub barb.