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

[uchiha89]

Problem cb400 spec 2

hey ppl..got my spec two bout two months back..bike was okay when i bought it..after a month of riding,,the bike started to lose power..its rather sluggish in terms of pick up as well as cruising on 3rd and 4th gear onwards..my mech then told me to change my clutch plates and so i did..i then changed my chain and sprockets,k&n airfilter,front and back wheel bearings as well as wash and tune my carbs..after tat it was smooth for only a week before it started being sluggish again..there was also once when i was riding on pie,my pipe started making tis *BOBOK* sound as if it was breaking down however i clutch in and throttle multiple times and after sumtime it got back to normal..its as if the bike was about to sieze...

i nid the bros here to lend me a hand regarding tis complication of my bike..btw could the suiggish response of my bike be due to eo? cause i juz tried using motul 5100 apart from my ows 8000...thanks ppl hope to hear from u guys soon...

[Ah Pek]

Problem cb400 spec 2

hey ppl..got my spec two bout two months back..bike was okay when i bought it..after a month of riding,,the bike started to lose power..its rather sluggish in terms of pick up as well as cruising on 3rd and 4th gear onwards..my mech then told me to change my clutch plates and so i did..i then changed my chain and sprockets,k&n airfilter,front and back wheel bearings as well as wash and tune my carbs..after tat it was smooth for only a week before it started being sluggish again..there was also once when i was riding on pie,my pipe started making tis *BOBOK* sound as if it was breaking down however i clutch in and throttle multiple times and after sumtime it got back to normal..its as if the bike was about to sieze...

i nid the bros here to lend me a hand regarding tis complication of my bike..btw could the suiggish response of my bike be due to eo? cause i juz tried using motul 5100 apart from my ows 8000...thanks ppl hope to hear from u guys soon...

 

Go have ur spark plug replaced.

[uchiha89]

hey ah peck i took ur advise and changed to the iridium spark plugs..would say the pick up all improve however when i try to slow down there is this thud2 sound coming from my bike..the mech told me he fixed the chain wrongly or sumting but after tat still gt the same problem.not to mention despite changing spark plugs,the speed at gear 4 and gear 5 is horrible..it feel like the bike sluggish again as if the valves were choke and i cnt go smoothly,like a rough feeling on my bike when riding faster..the funny thing is tat when i am going till 3rd gear,it feels damn smooth and nice but when 4th and 5th gear,really not smooth but rough ..nid help bro..i keep on bringing my bike to shop like 5times in one mth man..any help appreciated...thanks...

[Ah Pek]

hey ah peck i took ur advise and changed to the iridium spark plugs..would say the pick up all improve however when i try to slow down there is this thud2 sound coming from my bike..the mech told me he fixed the chain wrongly or sumting but after tat still gt the same problem.not to mention despite changing spark plugs,the speed at gear 4 and gear 5 is horrible..it feel like the bike sluggish again as if the valves were choke and i cnt go smoothly,like a rough feeling on my bike when riding faster..the funny thing is tat when i am going till 3rd gear,it feels damn smooth and nice but when 4th and 5th gear,really not smooth but rough ..nid help bro..i keep on bringing my bike to shop like 5times in one mth man..any help appreciated...thanks...

 

Have u check ur engine oil level and when was it last change? In the first place u should not have change clutch plates...it was awaste of money. Don't go back to that bike shop ANYMORE.

[uchiha89]

apeck i juz did my engine oil change last mth..i dun get it wats the problem wit the bike..the 1st 3 gears smooth but 4th and 5th its as if its damn super rough..stress liao..very rough till i feel 90km/h is like 60 or 70km/h..btw wats grounding?cn it help improve my bike?ur advise will be taken nt to return there..my clutch plates ori cost $160..feel like kena mutton chop...

[Ah Pek]

apeck i juz did my engine oil change last mth..i dun get it wats the problem wit the bike..the 1st 3 gears smooth but 4th and 5th its as if its damn super rough..stress liao..very rough till i feel 90km/h is like 60 or 70km/h..btw wats grounding?cn it help improve my bike?ur advise will be taken nt to return there..my clutch plates ori cost $160..feel like kena mutton chop...

 

It has nothing to do with ur clutch plates in the first place. As for eo..doesn't matter when you change if u kenna new but recycle eo...u never know. I can't think of much unless u wanna try my eo and grounding..grounding when done correctly, it replaces ur body as a negative earth return path to battery -ve terminal..thus enhance close to fully current load for various components of the bike..esp ignition coil. Final result is better stronger sparking giving u improve combustion thus equates to final 'product'.."horsepower".

[Maja]

hi guys. i'm riding a revo. i'm still running in my bike. just wanna ask usually at what rpm do you guys change gear? and also when moving off in gear 1 the pick up of my bike seems slow. if i open more throttle, the bike gets more noisy. anyways to improve the pick up?

[Spideyzam]

It has nothing to do with ur clutch plates in the first place. As for eo..doesn't matter when you change if u kenna new but recycle eo...u never know. I can't think of much unless u wanna try my eo and grounding..grounding when done correctly, it replaces ur body as a negative earth return path to battery -ve terminal..thus enhance close to fully current load for various components of the bike..esp ignition coil. Final result is better stronger sparking giving u improve combustion thus equates to final 'product'.."horsepower".

Can share wat eo u using and wat grounding service u provide?

[uchiha89]

Hey ahpek cn pm me ur contact and also ur charges..wanna try ur grounding and eo since u are highly recommended..thanks man...

[desmondband]

Help! I came back from overseas and tried to start my bike just now. Totally flat. 0.00 voltage. What should I do??

[desmondband]

I tried pushing down slope with gear 2 but didn't help. At least 6 times.

[tiku]

Can share wat eo u using and wat grounding service u provide?

 

ah pek using self made eo.. special eo mix wif x1r or even nano (optional)... gnding is 13pt unlike 5pt outside... =p

[desmondband]

Anyone?

[justforme]

Anyone?

 

most recommended is bring your battery to shop to charge. or if you go overseas frequently you can a charger for the battery so u can revive your dead battery everytime you come back

[justforme]

Anyone?

 

most recommended is bring your battery to shop to charge. or if you go overseas frequently you can a charger for the battery so u can revive your dead battery everytime you come back

[holysheet]

Is it ok that while riding at 100km/h, my rpm is also about 9000 - 9500 ? I'm riding ver S.

Also, how would i know if the carbs need to be balanced and cleaned? Ah Chong of P. Motors told me that "Motor tak rosak, lu mau kasi rosak", (literally means " bike no spoil, yo want to make it spoil" ) when i asked him to check my carbs before my solo trip to Malaka.

[Ah Pek]

Is it ok that while riding at 100km/h, my rpm is also about 9000 - 9500 ? I'm riding ver S.

Also, how would i know if the carbs need to be balanced and cleaned? Ah Chong of P. Motors told me that "Motor tak rosak, lu mau kasi rosak", (literally means " bike no spoil, yo want to make it spoil" ) when i asked him to check my carbs before my solo trip to Malaka.

 

Normally around 6k-6.5k rpm when at 100km/hr. Could be your sprocket size too big behind..standard for non Vtec back is 42 teeth and front 15.

[Ah Pek]

I tried pushing down slope with gear 2 but didn't help. At least 6 times.

 

Ur spark plug may be corroded...as for battery..take it out and send it to a mototiam to charge.

[freebird]

Although Murray Walker's video clip is quite informative about the wobble and weave phenomenon, my own experience to the wobble on my bike was down to the front tyre.

 

I was using Bridgestone BT090 at the time. I liked these tyres for it's dry and wet grip so I decided to use them again when I bought my Revo. The performamnce was good as expected when the tyres were new. The wobble only started appearing after about 6,000km and at speeds between 30-60km/h. Outside of this speed range, the wobble disappeared. After doing the usual checking (including wheel balancing) and some research, I concluded that the BT090s aren't meant to be used on CB400s due to it's H speed rating. H rated tyres are rated up to 180kmh only and I do ride at those speeds when touring. On several occasions, I had to brake and slow down to about 90kmh. I believe this rapid deceleration put too much stress on the carcass of the tyre, thus causing the wobble.

 

Since changing the tyres, my bike is fine. No wobbles at any speed.

 

I do indeed experience a similar problem with you. I feel vibrations from the front at speeds 40-70km/h and I suspect that my front tyre has issues even though the treads still looks good. On uneven surfaces, it felt very "slippery"

 

Mind sharing correct tyre pressures and what is the front tyre that you are using?

[Wargix]

Hi Guys, theres a slight dent on my tank due to domino of bikes falling down at my carpark. Any idea when I can get this knocked back to shape and sprayed ?

[daryltan90]

Hey guys, just wanted to check - is it normal that our bikes will start leaning to the right when we go free hand? I've been having this issue but im not sure if it's, at all, normal.

 

Can anyone please advise? Spec 1 here btw

 

Thanks!

[gethype]

[Q] hi all. I just bought a fw plater vtec 2. Anyone has an idea where to get a 1st hand original seat? Vtec3 ones able to fit to a vtec 2?

[vroooom_R1 98]

Hi all, where can I find RAdiator Mesh cover for the radiaTor??

Thanks in advance

[justforme]

Hi all, where can I find RAdiator Mesh cover for the radiaTor??

Thanks in advance

 

maybe you can go over to the CMO threads and look for godsend mesh cover. seems nice.

[satoshi]

hi all,

 

recently got my 2nd hand spec 3 but got a couple of issues, want to run thru you guys before i head to my bikeshop.

- feels wobbly and not stable when cornering even when in low speed

- when i tried to drag my 1st gear and 2nd gear the bike suddenly chokes n slows down and i have to change up to next gear

- sometimes when moving off in 1st gear feels like bike no power and gonna die n stall

 

thanks in advance guys