Son and I spent the day in Joshua Tree CA to test and tune our group of 250cc 1986 and 1987 Quadracers.

Lineup and engine mods are:

1986–stock motor with FMF pipe
1986–milled head .015”, home port, Kenny Roberts cone pipe, Mikuni TM38 carb

1987–bone stock
1987– milled head .025”, home port, CT pipe, Kehein 38mm pwk.