Summary of 3FA-AE2
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Yfm125s 3fa-ae2 supplementary service manual.
Page 3: Foreword
Foreword this supplementary service manual has been prepared to introduce new service and data for the yfm125s. For complete service information procedures it is necessary to use this supplementary service manual together with the following manual. Yfa1w service manual: 3fa-me1 yfa1(p) 2002 suppleme...
Page 4: Notice
Ebs00002 notice this manual was produced by the yamaha motor company primarily for use by yamaha dealers and their qualified mechanics. It is not possible to include all the knowledge of a mechanic in one manual, so it is assumed that anyone who uses this book to perform maintenance and repairs on y...
Page 5: How to Use This Manual
Ebs00004 how to use this manual manual organization this manual consists of chapters for the main categories of subjects. (see “symbols”) 1st title 1: this is the title of the chapter with its symbol in the upper right corner of each page. 2nd title 2: this title indicates the section of the chapter...
Page 6: Illustrated Symbols
Eb003000 illustrated symbols illustrated symbols 1 to 8 are printed on the top right of each page and indicate the subject of each chapter. 1 general information 2 specifications 3 periodic checks and adjustments 4 engine 5 carburetion 6 chassis 7 electrical 8 troubleshooting illustrated symbols 9 t...
Page 7: Contents
Contents specifications ............................................................................................1 general specifications ..................................................................1 maintenance specifications .........................................................2 engin...
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– 1 – spec specifications general specifications model yfm125s model code number 1c51: (for oceania) 1c53: (for cdn) 1c54: (for europe) dimensions overall length 1,710 mm (67.3 in) overall width 990 mm (39.0 in) overall height 980 mm (38.6 in) seat height 705 mm (27.8 in) wheelbase 1,080 mm (42.5 in...
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– 2 – spec maintenance specifications maintenance specifications engine chassis tightening torques model yfm125s carburetor i.D. Mark 5vj2 10 main jet (m.J) # 77.5 main air jet (m.A.J) ø 1.3 jet needle (j.N) 4hpy46-1 needle jet (n.J) o-1m cutaway (c.A) 2.5 pilot air jet (p.A.J) # 130 pilot outlet (p...
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– 3 – spec maintenance specifications electrical model yfm125s c.D.I. Magneto model/manufacturer f1c5/yamaha pickup coil resistance 248 ~ 372 Ω at 20 °c (68 °f) (lead color) (white-red) c.D.I. Unit model/manufacturer 3fa/yamaha charging system type a.C. Magneto generator magneto model/manufacturer f...
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– 4 – spec cable routing cable routing 1 rear brake switch lead 2 rear brake cable 3 front brake cable 4 front brake switch lead 5 throttle cable 6 fuel tank breather hose 7 horn switch lead (for europe) 8 horn switch (for europe) 9 headlight lead (left) 0 headlight lead (right) a neutral/reverse in...
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– 5 – spec cable routing È fasten the front brake switch lead with two plas- tic bands. É fasten the rear brake switch lead and handlebar switch lead with two plastic bands. Ê fasten the rear brake switch lead, handlebar switch lead, and horn switch lead with two plas- tic bands. (for europe) Ë do n...
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– 6 – spec cable routing 1 front brake cable 2 throttle cable 3 rear brake cable 4 rear brake switch lead 5 handlebar switch lead 6 horn switch lead (for europe) 7 wire harness 8 front brake switch lead È pass the front brake cable and rear brake cable through the cable guide. (for cdn and oceania) ...
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– 7 – spec cable routing Ë cross the front brake cables behind the steering shaft. Route the right front brake cable in front of the left front brake cable. Ì put the cover on the couplers, and then fasten a plastic band around the middle of the cover. Í route the rear brake switch lead and the hand...
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– 8 – spec cable routing 1 transmission case breather hose 2 throttle cable 3 front brake cable 4 main switch lead 5 wire harness 6 rectifier/regulator 7 horn lead (for europe) 8 horn (for europe) 9 starter motor lead 0 a.C. Magneto lead a starter motor È fasten the wire harness, starter motor lead,...
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– 9 – spec cable routing Ê fasten the wire harness, starter motor lead, and transmission case breather hose to the frame with a plastic band. Be sure not to pinch the transmission case breather hose. The end of the plastic band should be toward the front of the vehicle, facing inward. Ë pass the mai...
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– 10 – spec cable routing Ï 80 mm (3.15 in) Ð fasten the starter motor lead and a.C. Magneto lead to the frame with a plastic band. The end of the plastic band should be toward the rear of the vehicle, facing inward. Ñ fasten the starter motor lead and a.C. Magneto lead with a plastic locking tie. Ò...
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– 11 – spec cable routing 1 tail/brake light 2 tail/brake light lead 3 reverse relay 4 starting circuit cut-off relay 5 starter relay 6 positive battery lead 7 negative battery lead 8 transmission case breather hose 9 reverse switch 0 neutral switch lead a reverse switch lead b starter motor lead c ...
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– 12 – spec cable routing È fasten the tail/brake light lead to the rear carrier with a plastic band. É pass the positive battery lead through the rear hole in the rear fender. Ê pass the negative battery leads through the front hole in the rear fender. Ë fasten the wire harness with the holder. Ì a...
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– 13 – spec cable routing Ñ pass the battery breather hose through the guide. Ò route the battery breather hose so that there is no slack. Ó fasten the negative battery lead, neutral switch lead, reverse switch lead, and starter motor lead to the frame with a plastic band. The end of the plastic ban...
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– 14 – spec cable routing 1 c.D.I. Unit 2 air duct inlet hose 3 air duct outlet hose 4 fuel tank breather hose 5 fuel hose 6 crankcase breather hose 7 fuel overflow hose 8 rear brake cable 9 front brake cable (left) 0 front brake cable (right) a c.D.I. Unit holder È route the rear brake cable to the...
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– 15 – spec cable routing 1 c.D.I. Unit 2 throttle cable 3 starter motor lead 4 wire harness 5 transmission case breather hose 6 ignition coil 7 negative battery leads 8 positive battery lead 9 air vent hose 0 crankcase breather hose a starter cable b starting circuit cut-off relay c reverse relay d...
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– 16 – spec cable routing È route the c.D.I. Unit lead over the front shock absorber bracket. É route the negative battery leads under the frame. Ê route the positive battery lead over the frame. Ë pass the air vent hose through the hole in the fuel tank from the top. The end of the air vent hose sh...
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– 17 – chk adj periodic checks and adjustments seat, carriers and fenders seat, front carrier, front bumper and center cover t r . . 7 nm (0.7 m • kg, 5.1 ft • ib) t r . . 7 nm (0.7 m • kg, 5.1 ft • ib) t r . . 10 nm (1.0 m • kg, 7.2 ft • ib) t r . . 23 nm (2.3 m • kg, 17 ft • ib) t r . . 23 nm (2.3...
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– 18 – chk adj seat, carriers and fenders t r . . 7 nm (0.7 m • kg, 5.1 ft • ib) t r . . 7 nm (0.7 m • kg, 5.1 ft • ib) t r . . 10 nm (1.0 m • kg, 7.2 ft • ib) t r . . 23 nm (2.3 m • kg, 17 ft • ib) t r . . 23 nm (2.3 m • kg, 17 ft • ib) t r . . 23 nm (2.3 m • kg, 17 ft • ib) 4 3 2 1 7 5 6 (4) order...
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– 19 – chk adj seat, carriers and fenders front grill assembly and front fender t r . . 7 nm (0.7 m • kg, 5.1 ft • ib) t r . . 7 nm (0.7 m • kg, 5.1 ft • ib) 2 2 4 1 7 3 (6) (6) 5 6 order job/part q’ty remarks removing the front grill assembly and front fender remove the parts in the order listed. S...
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– 20 – chk adj seat, carriers and fenders rear carrier and rear fender t r . . 23 nm (2.3 m • kg, 17 ft • ib) t r . . 23 nm (2.3 m • kg, 17 ft • ib) 3 (4) (4) (4) 9 8 2 5 1 4 7 6 order job/part q’ty remarks removing the rear carrier and rear fender remove the parts in the order listed. Seat/center c...
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– 21 – chk adj t r . . 23 nm (2.3 m • kg, 17 ft • ib) t r . . 23 nm (2.3 m • kg, 17 ft • ib) 3 (4) (4) (4) 9 8 2 5 1 4 7 6 order job/part q’ty remarks 5 battery 1 6 carburetor joint clamp screw 1 loosen. 7 crankcase breather hose 1 disconnect. 8 air filter case 1 9 rear fender 1 for installation, re...
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– 22 – chk adj adjusting the headlight beams/ replacing a headlight bulb electrical ebs00122 adjusting the headlight beams 1. Adjust: • headlight beam (vertically) ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼▼▼ a. Turn the adjusting screw 1 in direction a or b. ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲...
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– 23 – chk adj replacing a headlight bulb 3. Remove: • bulb holder 1 • bulb note: _ push the headlight bulb holder inward, turn it counterclockwise and remove the defective bulb. Warning _ keep flammable products and your hands away from the bulb while it is on, since it will be hot. Do not touch th...
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– 24 – – + elec electrical ebs00503 ignition system circuit diagram off lo hi off on off push on off r w w w w r w g /w r /b g /y o o r r br r /b br l r /w w w w b r lr /b r /wb r wr (bla ck) rw (bla ck) rb r br g /y yb g /yb r by b (gra y) yb r (gra y) (red) (gra y) bb b r w g /w r /bb o g /y r /w ...
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– 25 – – + elec charging system ebs00516 charging system circuit diagram off lo hi off on off push on off r w w w w r w g /w r /b g /y r r br r /b br l r /w w w w b r lr /b r /wb r wr (bla ck) rw (bla ck) rb r br g /y yb g /yb r b (gra y) yb r (gra y) bb r /w l /w r /w l /w l /w l /w sb r /b br r /w...
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– 26 – – + elec lighting system ebs00518 lighting system circuit diagram off lo hi off on off push on off r w w w w r w g /w r /b g /y o o r r br r /b br l r /w w w w b r lr /b r /wb r wr (bla ck) rw (bla ck) rb r br g /y yb g /yb r by b (gra y) yb r (gra y) (red) (gra y) bb b r w g /w r /bb o g /y ...
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– 27 – – + elec lighting system ebs01067 troubleshooting check: 1. Fuse 2. Battery 3. Main switch 4. Light switch 5. Wiring connections (of the entire lighting system) note: _ • before troubleshooting, remove the following part(s): 1. Seat 2. Front carrier 3. Front fender panel • troubleshoot with t...
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– 28 – – + elec lighting system ebs01069 yes no 5. Wiring • check the entire lighting system’s wiring. Refer to “wiring diagram”. • is the lighting system’s wiring properly connected and without defects? Check the condition of each of the lighting system’s circuits. Refer to “lighting system” in cha...
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– 29 – – + elec signal system eb806000 signal system circuit diagram off lo hi off on off push on off r w w w w r w g /w r /b g /y o o r r br r /b br l r /w w w w b r lr /b r /wb r wr (bla ck) rw (bla ck) rb r br g /y yb g /yb r by b (gra y) yb r (gra y) (red) (gra y) bb b r w g /w r /bb o g /y r /w...
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– 30 – – + elec signal system checking the signaling system 1. The horn fails to sound. (for europe) yes no yes no yes no 1. Horn switch • check the horn switch for continuity. Refer to “checking the switch” (manual no.: 3fa-ae1). • is the horn switch ok? Replace the horn switch. 2. Voltage • connec...
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Yamaha motor co., ltd. 2500 shingai iwata shizuoka japan.
Page 41: Yfm125S Wiring Diagram
Yfm125s wiring diagram off lo hi off on off push on off r w w w w r w g/w r/b g/y o o r r br r/b br l r/w w w w b r l r/b r/w br w r (black) r w (black) r br br g/y y b g/y br b y b (gray) y br (gray) (red) (gray) b b b r w g/w r/b b o g/y r/w l/w r/w l/w b b l/w l/w sb r/b br r/w b b r r r r b b g ...