Idle Speed; Maintenance And Lubrication Schedule - Polaris 1999 Sportsman 400 Service Manual

LUBRICATION, I\IAINTENANCE AND TU NE·UP 91
6. Set the idle speed to 1200 rpm by turning the
throttle adjust knob (F igu re 95).
7. Slow ly tum the pilot a ir screw clockwi se until
the en gine speed begin s to decrease by 50 rpm or
greater, stop and note the screw location.
8. Slowly tum the pilot air sc rew counterclockwise
unt il idle speed increases to maximum rpm . Co n-
tinue to tum the pilot air screw counterclockwise
until idle RPM begins to drop . Sto p and not e the
screw location.
9. Center the pilot a ir screw between the screw set-
ting s achieved in Step 7 and Step 8.
10. Readjust idle speed
if
not within the idle speed
listed in Ta b le 6.
Id le Speed
CAU TION
Do not use the pilot air
sell?\1'
to change
the engine idlespeed. The pilot airscrew
must be set as describe d in this chapter
ort he engine may he
damaged
by
«rces-
sivety lean air/iuel mixture.
I. Co nnect a tac ho mete r acc ording to its man ufac-
turer 's instru ction s.
2. Refer to Tab le 6 fo r the correct idle speed.
3. Tu m the throttl e sto p knob (Fig ure 95 ) in to in-
crease o r out to decrea se idle speed.
Table 1 MAINTENANCE A ND L UBRICAT I ON SCH EDULE
Pre-rlde check Check tire conditio n and Inflation pressure
Check whee l rim c ondition
Check brake fluid level; add flu id
if
necessary
Check br ake lever operati on and tra vel
Check ti gh tne ss of nut s, bolts and faste ners
Check I uellevel J n fuel tank; top off if necessary
Dally checks Chec k air fi lter ele me nt
Check ai r filler air box sediment tu be
Check coo lant level I" reservoir
Check operation of headlight and brake lamp
Check d rive chain tension and co nd ition
Weekly Check for moisture In recoil starter housing
Check air f il ter element
Eve ry month or aft er 10-25 hours of ope rat ion Check battery condition
Check transmission oil level
Check fron t drive unit oil level
Check engine breather filter
Check brake pad wear
Every six months or aft er 50 hours of op erati on General lubricati on of chassis com pone nts
l ubricate stee rin g shaft bushi ng
Chang e engi ne 011 and fll ter
Check throttle operati on ; lubricate cabl e If necessary
Check ETC swi tch oper ati on
Check choke operatio n; lubr ic ate if nec essary
Drain carb uretor f loat bowl
In spec t all air intake d ucts and fittings
Ch eck coolant-to-water rati o
Check front hub l ubricati on
Check drive bel t (EBS mod els )
Check and adjust drive belt (no n-EBS mo de ls)
Check and adjust shift linkage
Check steeri ng ope rati on; l ubric ate if necessary
Check front suspension mounting fittings;
lu bricate If necessary
(con tinued)