SoCal Oldtimers Racing https://socalvetmx.org/Glen Helen https://glenhelen.com/American Retrocross https://americanretrocross.org/Vintage Iron https://vintageiron.com/Perris Raceway https://www.rideperris.com/
These might help. But since you say it just comes on for a second and then goes off, the third link below indicates that is normal.https://www.manualslib.com/manual/797757/Kawasaki-Kx450f.html?page=172https://www.manualslib.com/manual/797757/Kawasaki-Kx450f.html?page=124https://www.manualslib.com/manual/797757/Kawasaki-Kx450f.html?page=21