The purpose of this research is to : (1) Investigated the influence of the
number of catalyst on the Hydrocarbon Crack System (HCS) to engine power
Yamaha motorcycle Jupiter Z 2008. (2) Investigated the influence of variations
busi to power engine Yamaha motorcycle Jupiter Z 2008. (3) Investigated
interaction the influence of catalyst on the Hydrocarbon Crack System (HCS) and
variation of spark plug types to engine power Yamaha motorcycle Jupiter Z 2008.
Technique collection data of measurement by conducting power engine,
with the treatment of Hydrocarbon Crack System/HCS (A factor) and variation of
spark plug types (B factor), with 3 levels on the A factor and 2 levels on the B
factor, so that produced 6 treatment and every treatment done 3 times repetition in
order to obtain 18 data the measurement of engine power. Analytical techniques
of data in this research used anava two ways test to know the influence of the use
of Hydrocarbon Crack System (HCS) and variation of spark plugs types and
comparation pasca anava to know difference of treatment rate what kinds of that
produces the highest engine power.
Keyword : Hydrocarbon Crack System, spark plug types and engine power
