(A bove and below) Comparison of GSXR750 and GSXR11 00 frames,
with 1100 in foreground above and at left below.
.
(Above) GSXR 11 00 full fairing carries two headlights. (Below) One-piece
GSXR1100 crankshaft has machined-into-flywheel primary gea r.
Oil -cooling system's eight jet nozzles flood the f loor of t he cam case ;
turbulant oi l carries away combustion chamber heat, returns t o sump.
Inside the Suzuki GSXR 1100:
FAST TECH
By John Ulrich ,
MONTEREY, CA. NOV. 4
Suz u ki's n ew , oil-cooled GSXRllOO engine
makes m ore power and is a n as tonishing 52
p oun ds lighter than the air-coo led GSl150
engine that topped the company's sports
bi ke lineu p in 1985. The exa ct
numbers are 180 pou nds for
th e GSXR llOO engine, com pared La th e G S l 150 power-
10
pl ant 's 232 pounds. The co m p lete
GSX R I I00 motorcycle weighs 504
pou nd s wit h ,a fu ll tan k of gas o n a
cert ified sca le, co mpared to 56!
pounds for th e lightest GS 1150, the
un faired GS1150E. Added to th e
GSXR lIOO's ligh ter weight is more
horsepower, 128 bhp at 9500 rp m,
versu s th e G S1150's 119 bhp a t 8500
rpm ; th e GSXRIIOO ha s sligh tly less
torque tha n the GS 1150, 77 lb.vft. at
8500 compared to the GS I 150's 81 Ib.ft. at 6500 rpm.
The new eng ine ha s a bore a nd
stro ke of 76x58mm for 1052cc, compared to the GS 1150's 74x66mm and
1135cc, but is far more compact, wit h
a clutch-driven a ltern a tor mounted
o n top of th e cran kcases vs. an alterna tor on o ne end of the crankshaft: a t
its widest po int, th e GS XR I IOO mea sures 19.3 inc hes, vs. the GS 1150's
22.1 inches.
The co mpactness, lighter weight
and horsepower output are a ll made
possible, Suzuki enginee rs say . by the
use o f oil cooling. The keys to cooling a n en gine, they exp la in , ar e the
tem peratu re of th e cooling medium.
the velocity of the cooling medium,
and the contact area covered by the
