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

[Cb4sfour]

Q: While riding on the e'way (constant speed) my meter gauge shut off (needle goes to 0) & HISS lights start to blink. Then the both needles went up and down (like when turning on ignition). This keep happening while riding. When I got off the e'way and change to lower gear..engine suddenly shut off and can't start...No battery. Only after a "push start" can the bike be started. After reaching destination (abt 2mins later), I switch off and ON via ignition and the bike can start normally. Anyone has any idea what may cause this ??.

 

It could be that your kill switch is spoil and also have your battery check just in case it's your battery.

[desiboo90]

Anyone experience their vtec doesn't come In when rpm is reached.

 

 

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[gundu87]

Hi,

when braking at slow speeds, the front fork keep "juddering" or "rebounding" alot , like as if the braking on the disc is uneven. i tout it was the brake pads ,which i just changed as it was worn out , but nv solve the issue. i ask one motortiam at Yishun Indus there he say oil in fork not enough. M jus looking for advice and cost of solving it.

 

another question is my rear showa shocks are leaking. Previous owner serviced it in sept 2013. JUs need advice on whether to re service or to purchase new shocks, motortiam quote YSS shocks $300+ . worth it or not ah?

[gundu87]

Hi,

when braking at slow speeds, the front fork keep "juddering" or "rebounding" alot , like as if the braking on the disc is uneven. i tout it was the brake pads ,which i just changed as it was worn out , but nv solve the issue. i ask one motortiam at Yishun Indus there he say oil in fork not enough. M jus looking for advice and cost of solving it.

 

another question is my rear showa shocks are leaking. Previous owner serviced it in sept 2013. JUs need advice on whether to re service or to purchase new shocks, motortiam quote YSS shocks $300+ . worth it or not ah?

[justforme]

Hi,

when braking at slow speeds, the front fork keep "juddering" or "rebounding" alot , like as if the braking on the disc is uneven. i tout it was the brake pads ,which i just changed as it was worn out , but nv solve the issue. i ask one motortiam at Yishun Indus there he say oil in fork not enough. M jus looking for advice and cost of solving it.

 

another question is my rear showa shocks are leaking. Previous owner serviced it in sept 2013. JUs need advice on whether to re service or to purchase new shocks, motortiam quote YSS shocks $300+ . worth it or not ah?

 

Im having the same problem for my front brakes... up till now i got no solutions.. lol. hopefully some kind soul who has s solution can tell us.

[HaiR1]

Im having the same problem for my front brakes... up till now i got no solutions.. lol. hopefully some kind soul who has s solution can tell us.

 

 

 

Prolly need to Svc your front fork again..

 

The fork oil maybe have broke down in terms of properties.. Else choose a heavier "weight" oil to counter this prob.. 15W fork oil is abit harder compared to 10W fork oil.. But when it get season, it's just a minor difference.. Prolly Oso just wear n tear & time for u to Svc it

 

Rear "Servicing" of the shock is CRAP..

Honda doesn't have Original seal for it.. No matter how many times u Svc, it will not gurantee a leak-free shock..

 

Maybe Oso your Front Brake Pump is spoil.. Making the piston in the master cylinder stuck stuck..

Just ask shop to take a look , or change the Front Brake pump Kit

 

Tats my tot for you

[gundu87]

Im having the same problem for my front brakes... up till now i got no solutions.. lol. hopefully some kind soul who has s solution can tell us.

 

hahah. thanks bro. Heres a shoutout to the pros here. Tolong please!

[gundu87]

Prolly need to Svc your front fork again..

 

The fork oil maybe have broke down in terms of properties.. Else choose a heavier "weight" oil to counter this prob.. 15W fork oil is abit harder compared to 10W fork oil.. But when it get season, it's just a minor difference.. Prolly Oso just wear n tear & time for u to Svc it

 

Rear "Servicing" of the shock is CRAP..

Honda doesn't have Original seal for it.. No matter how many times u Svc, it will not gurantee a leak-free shock..

 

 

Tats my tot for you

 

Thanks bro. U beat me to a reply hhaha...

what oil u recommend me to get? i have read ur advice pretty much everywhere online but bit loss n don understand what it means. care to share bro?

 

as for rear shocks, what shocks do u recommend me getting?

[HaiR1]

Thanks bro. U beat me to a reply hhaha...

what oil u recommend me to get? i have read ur advice pretty much everywhere online but bit loss n don understand what it means. care to share bro?

 

as for rear shocks, what shocks do u recommend me getting?

 

 

 

I pm u my no

 

 

Come down n we have a chat.. Will explain u frm ther.. Easier to understand

[HaiR1]

Im having the same problem for my front brakes... up till now i got no solutions.. lol. hopefully some kind soul who has s solution can tell us.

 

Prolly need to Svc your front fork again..

 

The fork oil maybe have broke down in terms of properties.. Else choose a heavier "weight" oil to counter this prob.. 15W fork oil is abit harder compared to 10W fork oil.. But when it get season, it's just a minor difference.. Prolly Oso just wear n tear & time for u to Svc it

 

Rear "Servicing" of the shock is CRAP..

Honda doesn't have Original seal for it.. No matter how many times u Svc, it will not gurantee a leak-free shock..

 

Maybe Oso your Front Brake Pump is spoil.. Making the piston in the master cylinder stuck stuck..

Just ask shop to take a look , or change the Front Brake pump Kit

[justforme]

I pm u my no

 

 

Come down n we have a chat.. Will explain u frm ther.. Easier to understand

 

HaiR1 where you stay? got bike shop to recommend? haha.

 

my brake pump is also as soft as sponge. just this yr feb just replaced my stock brake pump pump kit as it was leaking from the seal. when the pump kit was dismantled it was super rusty but it did not solve the sponge feeling and also the constant jerking during braking.

[HaiR1]

HaiR1 where you stay? got bike shop to recommend? haha.

 

my brake pump is also as soft as sponge. just this yr feb just replaced my stock brake pump pump kit as it was leaking from the seal. when the pump kit was dismantled it was super rusty but it did not solve the sponge feeling and also the constant jerking during braking.

 

I stay at Jurong..

 

I reccomend @RaceWerks as their mechanics is :thumb:

 

Alternatively, do drop by their shop & have them take a look..

 

Superb worksmanship & knowledgeable mechanic

[justforme]

I stay at Jurong..

 

I reccomend @RaceWerks as their mechanics is :thumb:

 

Alternatively, do drop by their shop & have them take a look..

 

Superb worksmanship & knowledgeable mechanic

 

i know about racewerks but they are too far from me as i stay in punggol... are they usually packed during wkdays after work like 6-8pm?

[super4 needs help]

Guyz need help...my super 4 somehow for so long have no power...meaning my bike 100km/h cant chase another 100 or less..instead i got left behind...i change alot of things but still same...

[Ah Pek]

Guyz need help...my super 4 somehow for so long have no power...meaning my bike 100km/h cant chase another 100 or less..instead i got left behind...i change alot of things but still same...

 

B4 anyone can help..can you tell us what is ur version of S4..Vtec or non?..and what are the things you had changed..what did you tell the mech and what they change did not help.

[super4 needs help]

B4 anyone can help..can you tell us what is ur version of S4..Vtec or non?..and what are the things you had changed..what did you tell the mech and what they change did not help.

 

S4 spec 2...vtec...the only thing i had not touch is my sprocket n chain...i changed clutch plate,plug coil bcoz there was once only 2 was burning the other 2 is cold...my block n piston still new...bcoz recently it crack so i change a new set...not first hand...at first the change did help..it when smooth bcoz its new...after a mnth...everything start to like wear off...i did asked one worker at my worplace..he rode quite fast but actually 90km...n in that speed he leaving me behind..i was getting nowhere at 100km...

[Ah Pek]

S4 spec 2...vtec...the only thing i had not touch is my sprocket n chain...i changed clutch plate,plug coil bcoz there was once only 2 was burning the other 2 is cold...my block n piston still new...bcoz recently it crack so i change a new set...not first hand...at first the change did help..it when smooth bcoz its new...after a mnth...everything start to like wear off...i did asked one worker at my worplace..he rode quite fast but actually 90km...n in that speed he leaving me behind..i was getting nowhere at 100km...

 

The possibilities are many..may be you should check ur engine oil level first..too much..back compression can retard your engine overall performance. What engine oil are you using and how much was put in. Use the inspection window on the right side of your gearbox. Starighten the bike on a level ground while engine is very cold. Oillevel should be at the upper 2nd marking. Check this first.

[super4 needs help]

The possibilities are many..may be you should check ur engine oil level first..too much..back compression can retard your engine overall performance. What engine oil are you using and how much was put in. Use the inspection window on the right side of your gearbox. Starighten the bike on a level ground while engine is very cold. Oillevel should be at the upper 2nd marking. Check this first.

 

Already did..its above...i use ows engine oil...bcoz of the many possibilities i asked if i missed anything...anyway does spark plug play apart..bcoz i have not touch my spark plug yet...

[Ah Pek]

Already did..its above...i use ows engine oil...bcoz of the many possibilities i asked if i missed anything...anyway does spark plug play apart..bcoz i have not touch my spark plug yet...

 

One of the possibilities..usually if one of the plug is shorted or excessively worn..you are actually running on 3 cyclinders rather than 4.and exhaust sound bubbly like. You can confirmed only after running up engine at least after 5 mins. After engine has heated up..touch the four header with a quick tap. If there is one that's not hot or running cooler than the rest..time to change your plugs.

[apache3]

Hello,

 

[Q] where I can found neutral cable for Honda cb400 97 ? and what color of that cable ? I have plan put gear indicator.

 

Thanks you for your answer

[Crave]

Just a quick enq. This morning when riding my super4 vtec3 to work, everything seems ok but suddenly when moving off from traffic light, the acceleration seems very weird, as in it dun accelerate smoothly and when reach my office carpark, the engine just stalled. Den I smell a burning smell from my engine.

 

Den I try to start my bike, it manage to start but same thing, when I turn on my throttle, from rpm 1 to 5 it seems like it have difficulties and not smooth at all.

 

I check my oil tank and realise my petrol is damn empty, as in fuel really left that abit. Nearest petrol station is abt 1km away and I dunno if I can tong till there anot.

 

Sorry to ask, izit due to there is no fuel alr or something is wrong with my bike? My vtec3 is going 9yrs old alr..

 

thanks!!

[HaiR1]

Just a quick enq. This morning when riding my super4 vtec3 to work, everything seems ok but suddenly when moving off from traffic light, the acceleration seems very weird, as in it dun accelerate smoothly and when reach my office carpark, the engine just stalled. Den I smell a burning smell from my engine.

 

Den I try to start my bike, it manage to start but same thing, when I turn on my throttle, from rpm 1 to 5 it seems like it have difficulties and not smooth at all.

 

I check my oil tank and realise my petrol is damn empty, as in fuel really left that abit. Nearest petrol station is abt 1km away and I dunno if I can tong till there anot.

 

Sorry to ask, izit due to there is no fuel alr or something is wrong with my bike? My vtec3 is going 9yrs old alr..

 

thanks!!

 

 

 

 

Top up your petrol 1st n see how it goes..

 

There's fuel gauge btw

[apache3]

Just a quick enq. This morning when riding my super4 vtec3 to work, everything seems ok but suddenly when moving off from traffic light, the acceleration seems very weird, as in it dun accelerate smoothly and when reach my office carpark, the engine just stalled. Den I smell a burning smell from my engine.

 

Den I try to start my bike, it manage to start but same thing, when I turn on my throttle, from rpm 1 to 5 it seems like it have difficulties and not smooth at all.

 

I check my oil tank and realise my petrol is damn empty, as in fuel really left that abit. Nearest petrol station is abt 1km away and I dunno if I can tong till there anot.

 

Sorry to ask, izit due to there is no fuel alr or something is wrong with my bike? My vtec3 is going 9yrs old alr..

 

thanks!!

 

I have got twice for this matter too, first time because my petrol mostly empty and the second matter because one of that spark seem need to be replace with ea new one.

[justforme]

I have got twice for this matter too, first time because my petrol mostly empty and the second matter because one of that spark seem need to be replace with ea new one.

 

you shld try to topup the moment it hits reserve tank when your meter shows it. for me i personally top up when it shows 1 bar left. although that one bar plus reserve definitely can last me another round around singapore.

[apache3]

you shld try to topup the moment it hits reserve tank when your meter shows it. for me i personally top up when it shows 1 bar left. although that one bar plus reserve definitely can last me another round around singapore.

 

yes, I just got problem with fuel tank indicator on odometer, because I have change my front shock with R6 upside down where I can't use the original odometer. still fix it make it work with my replacement odometer.

 

thanks you for your advise.