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

[gethype]

How about changing riding style?..gentle on the throttle and not being throttle happy..

 

Bt i dont switch on vtec much. Bt i think i'll try once more to lessen it.

[r1der]

Bt i dont switch on vtec much. Bt i think i'll try once more to lessen it.

 

Ya, try not to open vtec so often, next check ur chain is it lose, and also ur tires whether the pressure is correct. All these small things may affect ur fuel consumption.

[manbai]

Apart all of the above, have you change your wheel bearings. I did what you did and my fc is about 330km per full tank on normal riding. VTEC2 is best known that its not the best fuel saver in its family but I'm happy with my ride. No problem on oil leaking, heating issues.

[afat89]

Hey guys nid help..i was riding on pie then suddenly my bike yoshi exhaust made tis "bobok(CHOKING)" sound as if its breaking down..so i then throttled the bike but the sound became louder like backfire sound however my bike speed did not increase..it juz became slow..i then stop at shoulder and turn it off..5mins later start and the bobok sound was gone..happen 2nd time already..any kind souls pls help...isit maybe my carbs dirty or tuned wrongly or maybe filled wit petrol grime or sumting..pls help!!appreciate it!

Edited March 26, 2013 by afat89

[gethype]

Ya, try not to open vtec so often, next check ur chain is it lose, and also ur tires whether the pressure is correct. All these small things may affect ur fuel consumption.

 

Hw to check the correct tyre pressure?

[gethype]

Apart all of the above, have you change your wheel bearings. I did what you did and my fc is about 330km per full tank on normal riding. VTEC2 is best known that its not the best fuel saver in its family but I'm happy with my ride. No problem on oil leaking, heating issues.

 

I try and do tt. Didnt thot abt tt. Thx man.

[gethype]

Guy, i tried to fill up my tank to the brim and travelled up to 25km and i top up my petrol again and it consumed 2litres. Which is bad right?

[gethype]

Hey guys nid help..i was riding on pie then suddenly my bike yoshi exhaust made tis "bobok(CHOKING)" sound as if its breaking down..so i then throttled the bike but the sound became louder like backfire sound however my bike speed did not increase..it juz became slow..i then stop at shoulder and turn it off..5mins later start and the bobok sound was gone..happen 2nd time already..any kind souls pls help...isit maybe my carbs dirty or tuned wrongly or maybe filled wit petrol grime or sumting..pls help!!appreciate it!

 

Maybe u try nt to fill up water in ur pipe when u was ur bike. It helps alot.

[r1der]

Hw to check the correct tyre pressure?

 

Normally i would try to turn the steering left right few times during stationary mode. If it feels heavy, tat maybe due to front tire air pressure low. For rear tire, i would sit on the bike during stationary mode n try to push forward. If i feel my bike is heavy to push, the rear tire may not has enuf pressure.

 

U can also buy the air pressure gauge if u wan more accurate judgement.

[gethype]

Normally i would try to turn the steering left right few times during stationary mode. If it feels heavy, tat maybe due to front tire air pressure low. For rear tire, i would sit on the bike during stationary mode n try to push forward. If i feel my bike is heavy to push, the rear tire may not has enuf pressure.

 

U can also buy the air pressure gauge if u wan more accurate judgement.

 

Usually whats the number on the air pump machine when u r filling it up?

[r1der]

Usually whats the number on the air pump machine when u r filling it up?

 

250 front, 290 rear as I often pillion my gf.

 

u can refer the the link below for more info:

 

http://www.singaporebikes.com/forums/showthread.php/138170-Discussion-Tyres-Related-Issue

[gethype]

250 front, 290 rear as I often pillion my gf.

 

u can refer the the link below for more info:

 

http://www.singaporebikes.com/forums/showthread.php/138170-Discussion-Tyres-Related-Issue

 

Eyyyy, thx alot for ur help man.

[gethype]

Just came back frm asphoon. They said a stock spec 2 cn go abt 18km/l. They checked up with boonsiew. Is it true?

[desmondband]

hi guys, need help here!

 

mine is a full system with very low clearence. recently hit a hump and from there my bike loss power.. when open Vtec it doesn't have the 'roar' sound anymore..

 

when travelling low speed at carpark can even here 'air' coming out from the bottom.. but i try to feel using hand nothing....

 

any idea what happen? if yes how much roughly for the repair cost??

 

Thanks for the advice!

[r1der]

Just came back frm asphoon. They said a stock spec 2 cn go abt 18km/l. They checked up with boonsiew. Is it true?

 

18 is considered high oledi. My spec 2 on average is 24km/l. Think they say 18 to play safe.

[r1der]

hi guys, need help here!

 

mine is a full system with very low clearence. recently hit a hump and from there my bike loss power.. when open Vtec it doesn't have the 'roar' sound anymore..

 

when travelling low speed at carpark can even here 'air' coming out from the bottom.. but i try to feel using hand nothing....

 

any idea what happen? if yes how much roughly for the repair cost??

 

Thanks for the advice!

 

Is there any dent or leak on ur header? Better bring to workshop for further checkup.

[iDavid]

Is there any dent or leak on ur header? Better bring to workshop for further checkup.

 

what will happen if there is dent to one of the 4 hearder? i gt a dent when going down a curb. pls advise =D

[desmondband]

i tried to touch but didn't feel any dent :|

[manbai]

Dent is not a problem. My worry is maybe there are hairline fracture or crack that could result in loss of power. i don't know if welding is recommended but could try it if not then change of header is required.

 

The longer you wait to rectify the bigger the crack will be if you keep riding your ride. My two cents worth.

[Spideyzam]

Anybody can enlighten me about EPS?

[RacingStyle]

Guys i am riding a CB400 Spec 2, I recently have water leaking from the water/coolant pump. According to the mechanic, i need to change the whole pump since it comes together.

 

May i ask you guys, what is the procedure like to change a water pump.

And where is the lowest price i can go to change.

 

Below i have attach the photo of the leak. Please take a look. Thank you guys

in advance

 

.

 

Regards:)

[freeland]

Hi guys, i just bought spec 3 a mth ago. just a few qns.

 

1. I noticed that sometimes when i close throttle and open again on normal riding like if i wanna drop gear and move, the speedometer needle wont move. It will be at zero. My rpm can still move up but max is at 5 and it wont go any higher and my bike will have a like rpm max sound and struggling.

 

2. Issit normal that when you change gear, there is a loud sound *TIAK!* ? sounds like engine oil empty or issit i kicked the gear up too hard? but i tried kicking up gentle and still got the sound. Only from 4th to 5th gear no sound. smooth.

[jorge_99]

hi all

 

juz bought a brand new revo n was wondering wat is the mileage for running in?

[rasmus]

Hello guys,

 

I just snapped my Super 4 Spec II Throttle Cable and I was wondering how much does it cost to get it replaced? Is it cheaper to buy it from Ah Boy and get an onsite mechanic to help me fix it, or is it better to tow the bike to a shop to get it fixed?

 

Cheers!

[gethype]

hey guys. theres this one part in the carb that has a slang which ppl call it 'rocket'. what is its real parts name ah?