The stock pipe works
best with Answer SA silencer. The cylinder ports should be cleaned and
matched. The carburetor jetting should be as follows: 1983, 150 Main
jet; 1984-85, 35 pilot and 280 main jet.
Changing the silencer
has the biggest performance improvement. The Answers SA works well
with a FMF pipe. Cylinder porting (clean and match casting and match
port heights) will tame the hard hit and give more low and top end.
Carburetor jetting should be as follows: 1986-87 models. 30 pilot jet,
p-2 needle clip position, 330 main jet; 1988 model, 48 pilot jet, p-3
needle clip position, 155 main jet. When performing top end rebuild
the factory service manual does not explain the KIPS timing procedure.
The dot marks on the drum valve align with the ring mark on the
actuator rod (rack). To check your work when the actuator rod is
pulled to the stop the valves should be open and when pushed in the
valves should be closed.
work best to improve the powerband over the entire rev range: FMF pipe
and straight through silencer, Boyesen RAD valve, cylinder porting.
Carburetor jetting; 48 pilot jet, 1173 needle in the middle clip and
155 main jet and turn the air screw out 1.5 – 2 turns.
The 1995 year was the
first year of the KX style exhaust valve system. The new design
utilizes a wedge for the main exhaust port. The design enables better
control of the effective stroke and compression ratio over a wider RPM
range. The best mod is an FMF pipe. If you need top run a spark
arrestor try the FMF or Acerbis 035. The next mod to consider is
cylinder porting. The cylinder needs the cast marks polished and
smoothed for more power throughout the power range especially on the
top end. A Boyesen RAD valve gives a modest gain in performance. If
you are having troubles with clutch slippage switch to stiffer clutch
springs: Kawasaki OEM #92144-1484. Run the transmission oil high on
the sight window. This will help reduce the noise from the clutch side
of the engine.