Vintage Motocross performance project
Watch in playlist OR check out the video pages below for more pictures
"It has a unique story to tell"
F9 Perfomance project episode listClick the links for the video pages with more pictures and information
THE F9 PROJECT episode 1 Evaluation and focusing of the project THE F9 PROJECT episode 2 Disassembling and inspecting the various parts THE F9 PROJECT episode 3 Engine modifications and other performance improvements THE F9 PROJECT episode 4 Pre-assembly and first start up THE F9 PROJECT episode 5 The finished project bike and recap (with Pictures!) Links to the specifications and information used to modify the engine on the Kawasaki F9 Big Horn KAWASAKI F5 (Bighorn) Speed Kit manual (some information used for this bike) F9 (BigHorn) speed secrets (text and magazine scans) KAWASAKI 238 F21M "Green Streak" a bike that inspired this build (Cycle January 1969 magazine scans) KAWASAKI F81M 250CC a bike that inspired this build (magazine scans) Vintage Skunk Works performance parts (intake pipe, suspension) Boge Mulholland shock specs and rebuild information (shocks rebuilt and used on this bike) Bassani expansion chamber (information about the exhaust used on this bike) Got a Kawasaki F11 250cc Enduro? Here is some performance modifications for that bike Affiliate link
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 Welcome to The F9 Project! In Barn Fresh season 2 the video series delves into a Kawasaki F9 (350cc) Big Horn and turns it into an F81M and F21M "Green Streak" inspired race bike. This series will focus on performance and handling rather than a full on restoration. The whole idea behind this build is to re-create what an typical rider, that could not afford and exotic European race bike, might do in 1972 to improve or turn his Big Horn into more of a race ready bike for TT or scrambles rather than a lackadaisical enduro that the factory bike is. The focus is not to make the ultimate Big Horn, but to make an improved version using period correct parts just as someone on a limited budget might do. Within the videos and video pages there is information, specifications and pictures to help show the scope of this project. Of course there are many ways to modify any particular bike, this series will show what I chose to modify and change on this bike. You won't want to miss this! The video above will give a broad overview of the entire series. (Pages/Links will become active when episodes are released) Also check out the links to pages with information I used in modifying my F9 Big horn. Be sure to check out all my other videos! Leave a comment below or on any of the video pages to ask a question!
F81M prototype Raced by Heikki Ylonen
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