|Mike Green (USA)
are some photo's of my bike that won me 16 championships!
Coast British Racing
1995, AHRMA National MX, Holister Hills, CA.
Premier Lightweight start. No.21 Mike Green on the WCBR-BSA C15MX leads
No.3D Brian O'Connor on WCBR-Ducati
250SCR. Mike won!
GP 1997, Premier Class Winner. Mike Green on the WCBR-BSA C15MX
Tommyville GP, Sandhill Ranch
Green aboard the WCBR-BSA C15MX (250cc) that he's raced for MANY years
finishes 3rd overall and 1st "Premier" class (pre-1965). Dick
Mann won overall on a DMS B50MX.
The C15MX after an AHRMA National MX at Sandhill Ranch,
Brentwood, California in 1992; who
says it doesn't rain here? The bike won, but... we had to drag it out of
the truck the next day! Nothing moved, not even the engine. We stripped it
100% and found sand (the track really is sand, add water and you have
grinding paste) in the cylinder, brakes, cables, swinging-arm pivot, etc. It
ruined the bike! We rebuilt it in 2 weeks time and won both motos!
My C15T a replica, I built this in 1994 (if I remember right). As
you can see it uses and early B44 frame, this has been modified. The back
bone was cut, then the down tube was heated - a bar in the head-stock
allow leverage, thus changing the steering head angle. The backbone was
then heated and pushed down level with the remainder of the backbone; a
spacer was cut and welded in place (approx 1.5"). Montesa Cota
clamps/forks/wheel where then fitted.
The engine was stripped 100% and we started over. Crank was polished, as
were all bits inside and out. A late B25 piston was used with the
"T" cylinder-head thus lowering the compressions to something
like 7:1. A "T" spec cam was used and a 626 Amal. The tick-over
is great! I can roll up to a section, and while I'm off looking it over
the BSA will just sit there and idle away. First time out I think I won
(was a while ago). The other C15 we use to race with Eric Tucker at the
same "muddy" Sandhill event. Eric raced a C15 in CVRG
(California Vintage Racing Group -pre AHRMA) MX from 1984 onwards, winning
a number of races and Championships. In 1988 we built my C15MX, thus had 2
C15s out there (Dick Mann's made 3).
BSA WCBR-B40MX (Ex-C15MX)
Later we'd build a blistering fast B40 engine (bottom pic)
went after and took the AMRMA-West 500cc Premier Intermediate Championship
with it. The B40 was sold nearly 3 years ago and has since won more races
and championships! The No.22 BSA with Eric Tucker at Sandhill Ranch... is
powered by a B40 and he won the 500cc race that day!
The WCBR-B40 was a fun project. Built in the early
1990's to replace the aging C15 engine in the No.22 machine (ridden by
Eric Tucker). Under CVRG/AHRMA rules "all modifications must be
period"; meaning: an early B40 can compete in the Premier 500 class
(pre-65), while a later Square B40 has to compete in Classic 500 (post-65
to 70). With that in mind we began with a Round Barrel B40 engine.
We had two things in mind; More BHP and strengthen the gearbox. With our
own blue-print in hand we put the cases into the mill and moved the
gearbox output bearing hole .250", then bored the L/S bushing hole to
take a needle... a B44 gear set was then fitted. The crank was lightened (a lot!),
then re-balanced to suit. The inside of the cases were polished, as was
the outside. A custom MegaCycle cam and B40SS followers were fitted. A B44
alloy cylinder was shortened to suit the B40 engine, a 9.5:1 Hepolite was fitted. The
head was ported/polished and big valves fitted. A special intake manifold
held a 932 Amal. Primary was all lightened and alloy clutch fitted. 428
sprockets/chain was used on the final drive. Ignition was stock points
with a MityMax battery eliminator. The engine had great power, revved to
the moon (for a B40), throttle response was: "twist the throttle and
the rear tire reacted immediately!" Best of all it was FAST and
dependable and won races!
Mike winning Moto 1 Angles Camp March 2003