[Q&A] SBF CB400 Official Q&A Thread 2009 (PLS ASK YOUR QUESTIONS HERE!)

[mfaisalby]

actually my bike also gt problem. but it occurs after engine starts.

 

when start, rpm goes to 1000rpm.. den slowly drop to 900rpm den 800rpm den died. n when wanna rev up to maitain d rpm, the petrol didnt flow smoothly. must open more throttle den d petrol will flow better. i went to shop, shop say gt water around cdi area. but clear liao nw still d same leh. only a bit better lah.

 

like lazy go shop sia. go shop again money come out. -.-"

[mfaisalby]

actually my bike also gt problem. but it occurs after engine starts.

 

when start, rpm goes to 1000rpm.. den slowly drop to 900rpm den 800rpm den died. n when wanna rev up to maitain d rpm, the petrol didnt flow smoothly. must open more throttle den d petrol will flow better. i went to shop, shop say gt water around cdi area. but clear liao nw still d same leh. only a bit better lah.

 

like lazy go shop sia. go shop again money come out. -.-"

 

ah pek boss gt solution? other super 4 i see start one time can maintain rpm liao. mine must rev n rev to maintain. btw just svc carb 2 mths ago. gone 5500km.

[iDavid]

The carbon brush in ur starter motor need to be replaced as it's worn. For the time being..if it can't start the next time..just sit on the bike and reserve in second gear and suddenly let go the clutch and hear a "whine" noise..then shift back to neutral and switch on the bike and start as normal.

 

thanks Ah Pek and mfaisalby for ur feedback. Gt a few extra questions, where is the starter motor located? how much does it cost to replace the carbon brush in the starter motor? ahpek, "reserve in second gear" after i let go clutch and hear the whine sound i must open throttle? or after hearing the whine sound i clutch in shift back neutral the bike will start alr?

[iDavid]

actually my bike also gt problem. but it occurs after engine starts.

 

when start, rpm goes to 1000rpm.. den slowly drop to 900rpm den 800rpm den died. n when wanna rev up to maitain d rpm, the petrol didnt flow smoothly. must open more throttle den d petrol will flow better. i went to shop, shop say gt water around cdi area. but clear liao nw still d same leh. only a bit better lah.

 

like lazy go shop sia. go shop again money come out. -.-"

 

 

my bike sometime morning also like that but i nv pay attention to the RPM. normally after start the idling sound like kanna "choke" or wan to die dun wan die those sound but after awhile later it gets better and more smooth. Will increasing the idling help with ur problem?

[jayz]

hi bros out there encounter a problem today. Ride to work and when abt to ride back after work i start bike yet it cannot start. Gt headlight and meter light but cannot start, press the electric start button but no response (not even hearing and spark plug sound). push the red engine-off switch off and back on the `hiss` nv light up. After that did some 'tapping' on the "electric-start" and finally manage to start. Since the encounter every now and thn i start bike the problem will surface randomly. Riding a Spec 2 FX plate, problem bothering me coz i dun wan get stuck at work place or somewhere far and i cant start bike to ride back home.

 

i last time also got this problem, is the start switch, inside siao siao already

 

when on, got light but press start button no crank

 

after change start switch ok liao $140 from unique.

 

mayb chek on this first bro

[iDavid]

i last time also got this problem, is the start switch, inside siao siao already

 

when on, got light but press start button no crank

 

after change start switch ok liao $140 from unique.

 

mayb chek on this first bro

 

 

okay! thanks jayz, will be monitoring the issue/problem.. =D

[Ah Pek]

thanks Ah Pek and mfaisalby for ur feedback. Gt a few extra questions, where is the starter motor located? how much does it cost to replace the carbon brush in the starter motor? ahpek, "reserve in second gear" after i let go clutch and hear the whine sound i must open throttle? or after hearing the whine sound i clutch in shift back neutral the bike will start alr?

 

No..no need to turn throttle. What we want is the motor armature arm to move so that the carbon brush would have some movement backward up and comes in contact again. What the rest said is true too about the switch. It may be dirty due to rain water washing dirts and dust over the years and accumulated inside the assembly..may try using WD40 to spray in between the gaps (can open up half way oso..just two screws under) to clear off any stubborn dirt that forms an insulation to contact. The starter motor is the cyclindrical unit u c below the carbs and behind the engine block on ur right lying horizontally. Tapping hard on it oso helps beside push starting the bike if it's carbon brush problem. Part is cheap but labor is costly..carbs has to come off and coolant drain.

[iDavid]

No..no need to turn throttle. What we want is the motor armature arm to move so that the carbon brush would have some movement backward up and comes in contact again. What the rest said is true too about the switch. It may be dirty due to rain water washing dirts and dust over the years and accumulated inside the assembly..may try using WD40 to spray in between the gaps (can open up half way oso..just two screws under) to clear off any stubborn dirt that forms an insulation to contact. The starter motor is the cyclindrical unit u c below the carbs and behind the engine block on ur right lying horizontally. Tapping hard on it oso helps beside push starting the bike if it's carbon brush problem. Part is cheap but labor is costly..carbs has to come off and coolant drain.

 

okay noted! thank once again ahpek =D

[kp_voon5357]

Hi all,

I plan to upgrade to class 2A bike. What are the important thing to check when viewing cb400? Thanks for cb400 riders,,,

[Muge]

ah pek boss gt solution? other super 4 i see start one time can maintain rpm liao. mine must rev n rev to maintain. btw just svc carb 2 mths ago. gone 5500km.

 

I got the same problem before, I'm riding spec3. It turns out a carb issue. Have to replace needle and main jets. No more problem after that.

 

 

Sent from my GT-I9100 using Tapatalk 2

[mfaisalby]

I got the same problem before, I'm riding spec3. It turns out a carb issue. Have to replace needle and main jets. No more problem after that.

 

 

Sent from my GT-I9100 using Tapatalk 2

 

Okay. How much it cost to replace eh?

[mfaisalby]

Hi all,

I plan to upgrade to class 2A bike. What are the important thing to check when viewing cb400? Thanks for cb400 riders,,,

 

Hello! Well look fr d normal wear and tear issues lor jus like viewing other bikes.

 

1) Price & Mileage & age of bike

2) Brakes (Front/Rear)

3) Headlight / Tail lights

4) Signal lights

5) Tyres

6) Sprocket / Chain

7) Front fork / Rear shock stiffness/ leakage

8) Throttle (it shld spring bck to orginal position after twisting)

9) Clutch cable (shld b smooth)

10) Speedo meter/ Rpm meter and other meters.

11) Signs of leakage

12) Signs of drop / accident (scratches at handlebar, engine guard, foot pegs etc)

13) modifications (dun b distracted by d modifications as it can b illegal. will only cause u problem in d future. that is if u mind it being illegal.)

[Muge]

Okay. How much it cost to replace eh?

 

parts + labour = $200 at planet. it's for all four carbs.

[kp_voon5357]

Hello! Well look fr d normal wear and tear issues lor jus like viewing other bikes.

 

1) Price & Mileage & age of bike

2) Brakes (Front/Rear)

3) Headlight / Tail lights

4) Signal lights

5) Tyres

6) Sprocket / Chain

7) Front fork / Rear shock stiffness/ leakage

8) Throttle (it shld spring bck to orginal position after twisting)

9) Clutch cable (shld b smooth)

10) Speedo meter/ Rpm meter and other meters.

11) Signs of leakage

12) Signs of drop / accident (scratches at handlebar, engine guard, foot pegs etc)

13) modifications (dun b distracted by d modifications as it can b illegal. will only cause u problem in d future. that is if u mind it being illegal.)

 

 

Thanks for the information.

 

Just view version S today, owner said the temp LED on/off with lit even during raining day and need to top up the coolant. It this something wrong with radiator?

[wht3fr3]

Need some help too. I dun get it when i turn off and on my ignition e trip 1&2 & time all reset. Btw i jus check rectifier, magnetic coil and battery all ok. My voltmeter is faulty.. But supposely wun affect the trip 1 & 2 & time. Any kind soul to enlighten me??

 

finally my meter is ok.. jus when i find out my battery is faulty it disturb my meter.. found e problem...

 

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[wht3fr3]

wow plus my magnetic coil burnt also.. next time if meter go haywire better to check all electrical stuff..

 

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[jayz]

Total damage?

 

Y so many spoil tgt?

 

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[wht3fr3]

total damage abt :

magnetic coil 320

gasket 25

battery 55

 

any bro can tell me if i kena chope?

including of installation.

 

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[amatbeck]

Hi bros, just yesterday my bike create problem. when i turn on the ignition, my meter light and headlight don't turn on. And i can't start my bike. So for now i need to push start my bike. quite troublesome. Wonder what's the problem. Any opinion?

[manbai]

Hi bros, just yesterday my bike create problem. when i turn on the ignition, my meter light and headlight don't turn on. And i can't start my bike. So for now i need to push start my bike. quite troublesome. Wonder what's the problem. Any opinion?

 

Have you check the fuses?

[wht3fr3]

Hi bros, just yesterday my bike create problem. when i turn on the ignition, my meter light and headlight don't turn on. And i can't start my bike. So for now i need to push start my bike. quite troublesome. Wonder what's the problem. Any opinion?

 

Pls gif more details like when e last time u rode any drop in voltage or did ur voltmeter gt siao siao?? Den last thing any jerking feeling when u last rode? Ur bike is vtec wat??

 

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[amatbeck]

Have you check the fuses?

i just went to bike shop and the mechanic told me that the battery problem so i replaced the battery. Hopefully nothing serious.

[Ah Jeff]

Hi Everyone,

 

I need advice. While I was riding my super 4 spec 2 few hours ago. Suddenly my speedometer's light & meter went off. Headlight was on but signal lights left & right fails. It just like black out. Funny part is I still can ride (but don know the speed at all) & also found out that the HISS's light do blink every few seconds.

 

I'm very worry whether is the Honda system's faulty or is just a wiring problem due to washing the bike.

 

Need advice..

[Ah Pek]

Hi Everyone,

 

I need advice. While I was riding my super 4 spec 2 few hours ago. Suddenly my speedometer's light & meter went off. Headlight was on but signal lights left & right fails. It just like black out. Funny part is I still can ride (but don know the speed at all) & also found out that the HISS's light do blink every few seconds.

 

I'm very worry whether is the Honda system's faulty or is just a wiring problem due to washing the bike.

 

Need advice..

 

No worries...just ur 10 amp fuse (red color) for the meter light/indicator blown. Its located on ur left side panel cover (have to use Allen key size 5) in a black fuse box. There are 4-5 of the same fuse and 1 oe 2 spares. Just replace it. Look under the fuse black cover to see the instruction label which fuse (should be the 2nd one) ..if it's blown, the wire in the fuse is broken and can be seen thru the lights. If no spare..can temporarily use the fan one till u get a replacement.

[wodepigu]

Hi I got a basic question to ask. Wen we ride our bike after we stop e fan wil turn on due to engine is hot. Wen I switch off e engine e fan is still on. My question is izzit a muz for us to wait til e fan bring e engine temp down and it stop fanning den we use our key to complete turn off our bike?

 

Second question. What is fatbar? I try google gif me funny result. I intend to chg my handle bar cuz previous owner dmg it. Its a bit nt straight. Izzit better to chg to original or any aftermarket u all cn recommend? Prefer to b chrome

 

Ths a lot!!