MACHINE TUNING 4-7
1
Adjustment of slow system
1) Set the air screw as specified.
2) See if the selected slow jet is correct or not by
judging the air/fuel mixture. If air/fuel mixture is
rich, replace it with smaller one. If air/fuel mix-
ture is lean, replace it with larger one.
2
Adjustment of main system
With the throttle opened 3/4 to full, make main sys-
tem adjustment monitoring the air/fuel mixture con-
dition after completion of pilot system settings.
* If selection of the main jet is between the col-
umns, take the larger number main jet first to pre-
vent the piston seizure.
* Make sure to adjust the main system before
adjusting the intermediate system.
3
Adjustment of intermediate system
Monitor the air/fuel mixture condition and adjust the
intermediate system by selecting the proper needle
size. Changing standard needle within one size
(larger or smaller) will cover almost any race condi-
tion.
4
Fine adjustment of slow system
After a proper standard setting has been obtained
by the procedure
1
through
3
, fine tune the carbu-
retor according to the actual race conditions.
1) Adjust the air/fuel mixture by tuning the air
screw within 1/2 – 2 turns out.
1/2 turn out
1 – 1/2 turns out
2 turns out
2) If the mixture can not be adjusted by the air
screw within 1/2 – 2 and 1/4 turns out range,
readjust the pilot system
3
.
5
Fine adjustment of intermediate system
Fine tune the intermediate system by changing the
clip position.
Ex.
Pilot jet #50
If air/fuel mixture is rich, replace it with #48
slow jet. If air/fuel mixture is lean, replace
it with #52 slow jet.
Ex.
Main jet #128
If air/fuel mixture is rich, replace it with
#125 main jet. If air/fuel mixture is lean,
replace it with #130 main jet.
Lean
STD
Rich
1
2
3
4
5
Summary of Contents for RM85
Page 1: ...Part No 99011 02B82 01A April 2006 EN TK RM85 L OWNER S SERVICE MANUAL ...
Page 10: ... MEMO ...
Page 42: ...3 TROUBLESHOOTING 3 1 CONTENTS TROUBLESHOOTING TROUBLESHOOTING 3 2 ENGINE 3 2 CHASSIS 3 5 ...
Page 47: ... MEMO ...
Page 85: ...7 2 CLUTCH CONSTRUCTION CLUTCH 70 N m 7 0 kgf m 50 5 lb ft ...
Page 93: ...8 2 KICK STARTER CONSTRUCTION KICK STARTER ...
Page 97: ... MEMO ...
Page 115: ... MEMO ...
Page 117: ...11 2 FUEL SYSTEM CONSTRUCTION FUEL SYSTEM ...
Page 121: ...11 6 FUEL SYSTEM REASSEMBLY Reverse the sequence of removal ...
Page 141: ... MEMO ...
Page 200: ...SERVICING INFORMATION 18 15 Radiator hose Throttle cable Clamp Clutch cable ...
Page 205: ... MEMO ...