Some of the most winningest & trickest motocross bikes i've seen built were..
1970's were Trevor's Maico's & Yamaha's.
1982 Darryl Willoughby Yamaha YZ490
1983 My Suzuki Rm500 & 250, Darryl Willoughby YZ490.
1984 Jimmy Ellis Yamaha YZ125, 250 & 490, Stuart Bennetts Yz490
" Ricky Murphy's Suzuki RM500
1985 Jimmy Ellis Yamaha Y125, 250 & 490.
1987 Jeff Leisk Yamaha YZ250 (burswood supercross)
1988 Steve Dinsdale Honda CR250.
The most talented individual i knew in regards to suspension set up, engine knowledge & race craft to this day, Trevor could have run & managed any team in the world with great success.
His talent did'nt stop at motocross only, He was very influentual in road racing with Michael Dowson & Kevin Magee & the Marlboro Yamaha super bikes.
Great mentor & clever man !!!!