Honda 2003 NPS50 Ruckus Service Manual page 291

Chcct
1$ thr: engine o;t
NO
YES -GOT OSTEPS.
8. lgnitiofl Timing ln;.poctiiQn
C�ck thO ignition timi119.
It; thg ig n i d o n timing '"' i l h l n specification?
NO
YES
9. Cyl.lnder compression lnspcc;tion
Tes! the cvlinder comprNsion,
Is the
NO
YES
10. Carburetor 11\spectlon
Check the carburetor
Is the catburetor clogged?
YES
NO
11.1ubric;nion ln;pcxtion
Remove the
1$ the v<tlv4! t n t f n lubrlc.$t«/ properly'!
NO
YES
12. Overheati1\Q Inspection
Check f01 engine oyerflesting.
I s the �nglne overheating?
YES
NO
13. Eng i n e
Act:cl.erate or run
Is thtt
YES -
NO
21-4
the
oil level "nd -condition.
�;ondltlolll
i n g o o d
-
• levei too hlg h
O l l
• o n level too low
• Contamina;ed oil
•
•
Faulty ECM
• Faulty Ignition pulse generator
•
Improper valve timlflO
- GO TO STEP 9.
compr sss i on w i t h i n
$1J(Jr-.ific.J�Hon7
•
-
VDlvc tOO
c:lcor�nc!:l !:mall
oylinclcr ;:nd p i S l on
Worn
lmpreper wtve timing
�!dngfdameged cylinder head gasket
-
GOTOSTEP10.
for
cla..,s.
-
Carburetor SMViccd frcqu-ootly enough
not
- GOTOSTEP11.
c;yllm::ior hc.;:td cover and lnspeC��
..
Clogged oil passsge
- GO TO STEP 12..
-
Coolant level too low
lhermo&t<Jt $1ut:k cl(ll;lfl';l
Exoes&ivtt carbon build·vp in <,: (l mbustion chamber
of p eor u;J!i tv f u el
V & c
q
C!vt<:h S'lipping
L.,..n
tucl miJCtore
·GOTOSTEP13.
Kl'locking lnspectton
high &peed.
81
6ng111� knocklllg?
Worn p l s •o n and cyt i nder
Wrong type of fuel
Excessive carbon bvilcklp in combu$tion chombe:r
too ;s(lv;'l n c;od lf�vlty ECM)
�nition timing
lean fuel mixture
Engin� docs
not kno::k'
rings
for
stgns of proper lubrication.
I -
I
I
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