[Discussion] CB400 SUPER FOUR HYPER VTEC Revo

[lawrence81]

Anyone interested to buy one 2nd hand revo stock exhaust header with exhaust.im letting go at $350.if interested can watapps mi at 96991981.thks

[kelena]

just a quick check: does anyone here have a rear 44T sprocket that is good for a 520 chain for sale?

 

i'm looking for a trade with my driven 45T rear.

[muhammad hakim]

LOL... 210-215 is enough lah, bro. Do remember it's only a 400.

My bike still has the speed limiter so my max has been 190km/h. Tripped the limiter twice already. Quite fun... And yes, it still has some way to go because my revs are only at about 11.3k when hitting top speed.

 

I don't know how the CB400 limiter is triggered. Some are programmed into the ECU mapping whilst some use a combination of RPM/speed sensor. If Extreme Equipment people talk about just snipping a wire, then it is the latter sensor type.

 

Whilst I personally won't do it, I hope you be careful when you remove the limiter. It's there for a reasoned. Do service more often when you do those high speed runs

Gd afternoon guys! Yes, talking abt speed limit, i believe every machine have their limits. I hv hit the highest limit too, which is 190 km/h. On gear 6th rpm at aroun 11.5k. At that point, I felt satisfied as bike are stock yet can reached to the so called "Game Over" point.

[muhammad hakim]

13.8 while riding is normal. As @SparkerS1 said, if while riding it drops below 13.5v something might be wrong.

When you switch to "On" and without starting, it should read:

12.5v with headlights Off.

12.4v with headlights On.

 

Sometimes it might read just 12.3v without starting. Read the FAQ about riding distances, speed and battery charging.

Sorry to say to both of u. At this point, i totally disagree. Saying 13.8 while riding is normal, 13.5 below something is wrong???? I have been riding My Revo 3 yrs plus. From the second day, volt meter already attached. Till now my reading while "ON" without engine start is 11.9 headlight off. 11.5 headlight on. Engine start without headlight on will be 13.8. Will drop to 13.2 if headlight on and while riding. If whether is raining, will be 13.4.

 

Ever been to unique to check with their voltage device tester (forgot the device name). Double confirm my volt meter is accurate!

 

Bike stock with no grounding or what so ever being done, battery ever changed. Have been charge before putting on the bike. (Original Yuasa) Using Philips Vision Plus Bulb.

 

[muhammad hakim]

13.8 while riding is normal. As @SparkerS1 said, if while riding it drops below 13.5v something might be wrong.

When you switch to "On" and without starting, it should read:

12.5v with headlights Off.

12.4v with headlights On.

 

Sometimes it might read just 12.3v without starting. Read the FAQ about riding distances, speed and battery charging.

Sorry to say to both of u. At this point, I totally disagree. Saying 13.8 while riding is normal, 13.5 below something is wrong???? I have been riding My Revo 3 yrs plus. From the second day, volt meter already attached. Till now my reading while "ON" without engine start is 11.9 headlight off. 11.5 headlight on. Engine start without headlight on will be 13.8. Will drop to 13.2 if headlight on and while riding. If whether is raining, will be 13.4.

 

Ever been to unique to check with their voltage device tester (forgot the device name). Double confirm my volt meter is accurate!

 

Bike stock with no grounding or what so ever being done, battery ever changed. Have been charge before putting on the bike. (Original Yuasa) Using Philips Vision Plus Bulb.

 

Bike manufactured in yr 2008.

[PeaceZ]

Hi Guys, I need some help

 

A Fren of mine lost his S4 Revo keys,

So he went to the shop to get the spare key and the problem is that the spare key that the shop kept has problems.

Says that chip programming has "run" Thus being unable to start the bike but only able to unlock the handle and turn on the lights.

 

Any idea of a way to solve this issue other than getting a new CDI?

And even if its a new CDI, how much would it cost?

My fren was quoted $900. I kind of feel thats too much to pay just to lose a key. and the fact that the shop is holding on to a malfunction key doesnt make it any better.

 

Thank you in advance.

[ramsnake]

Hi Guys, I need some help

 

A Fren of mine lost his S4 Revo keys,

So he went to the shop to get the spare key and the problem is that the spare key that the shop kept has problems.

Says that chip programming has "run" Thus being unable to start the bike but only able to unlock the handle and turn on the lights.

 

Any idea of a way to solve this issue other than getting a new CDI?

And even if its a new CDI, how much would it cost?

My fren was quoted $900. I kind of feel thats too much to pay just to lose a key. and the fact that the shop is holding on to a malfunction key doesnt make it any better.

 

Thank you in advance.

 

Saw this post on FB S4K page. Answered by WSM there already. Looks like your friend has to replace CDI. As for price, call Boon Siew and a few other shops to compare.

[SparkerS1]

Sorry to say to both of u. At this point, I totally disagree.

 

I just mentioned if not below 13.5V, it's alright.

If it does, Just have to keep monitoring just to be sure.

if below 12V, confirm the battery is not getting its charge.

I started the bike when the batt is 12.5V and it starts off very weak.

 

Btw you using ytx-9bs or ytz10s yuasa battery?

[muhammad hakim]

Btw you using ytx-9bs or ytz10s yuasa battery?

I'm using the YTZ10S bro, anyway it have been 3 yrs+ my voltage remain like that. Nothing wrong or feel weak when wanted to start the engine.

[ramsnake]

Sorry to say to both of u. At this point, I totally disagree. Saying 13.8 while riding is normal, 13.5 below something is wrong???? I have been riding My Revo 3 yrs plus. From the second day, volt meter already attached. Till now my reading while "ON" without engine start is 11.9 headlight off. 11.5 headlight on. Engine start without headlight on will be 13.8. Will drop to 13.2 if headlight on and while riding. If whether is raining, will be 13.4.

 

Ever been to unique to check with their voltage device tester (forgot the device name). Double confirm my volt meter is accurate!

 

Bike stock with no grounding or what so ever being done, battery ever changed. Have been charge before putting on the bike. (Original Yuasa) Using Philips Vision Plus Bulb.

 

Bike manufactured in yr 2008.

 

I also said that if voltage is below 13.5 while riding something might be wrong.

 

It's very strange that you're getting such a low reading from your battery. Do note that even Yuasa may be a bad battery when "new". Some of these shop/dealers have had them in stock for a long time. Thus even when they charge the battery when selling it to you, it doesn't hold a full charge anymore.

 

Anyway, maybe you'd like to consider these -

a) If the bike can run on a 11.5 or 12v battery, why don't the manufacturers specify 11.5 or 12v batteries instead of specifying 12.5v?

b) If a bike can run on 11.5-11.9 as your bike does, does it mean that it is operating at it's optimum performance?

 

I think in your case, the battery is not holding the charge it is supposed to (12.5v as stated on the battery itself). Although you can start the bike with every day use, it would probably not start if not used for a few days to a week.

[tzmdegil]

Guys chillax ahhh. Dun just bcoz of battery u all wan to argue. I just asking when is the time for me to change battery. Btw thnx for the help. Peace

[afi1605202481]

@a'fi

Sorry haven't had time to answer this. @viewpanel is right. If it is the TPS, save money and go to Unique. Not sure if other workshops carry the aftermarket TPS.

 

I have a theory about faulty TPS with a video to prove it. Just don't have time to upload yet. Anyway, to all bros here. If your bike comes with the 3 breather hoses disconnected, please get them re-installed. I believe most TPS faults (actually only a few seen in this forum) are caused by water dripping down the tank onto the TPS.

 

thanks for the comments @ramsnake and @viewpanel .. I just changed my TPS less than six months ago at unique.. I dont think its TPS.. currently my fuel injector indicator lighted (yellow light) on once in a while and result in idling less than 1..

 

went to planet and he say its my injector and need to replace the whole set.. im currently think of doing body throttle service ?? anyone know what it does ?? and what the difference between body throttle service and fuel injector service ?

[viewpanel]

thanks for the comments @ramsnake and @viewpanel .. I just changed my TPS less than six months ago at unique.. I dont think its TPS.. currently my fuel injector indicator lighted (yellow light) on once in a while and result in idling less than 1..

 

went to planet and he say its my injector and need to replace the whole set.. im currently think of doing body throttle service ?? anyone know what it does ?? and what the difference between body throttle service and fuel injector service ?

 

Fuel injector services is just to clean ur fuel injector nozzle.... IMHO, i dun think that is necessary. not much diff really. of course this is a highly debatable topic. many will agree with me and many will also argue with me. this is similar to the case of voltage stabliser uses...

 

My opinion... try to look at the few common revo fault n narrow down the problem. I reckon maybe u can look at the fuel pump.. sometimes may be the fuel pump crack n thus the fuel pump to loses pressure and cause ur idling to drop... this kinda thing need to open up n see. bring to an experience mech n tell them to check is better. fuel injector cleaning services wun solve this issue. good money earning for shop though...

[viewpanel]

thanks for the comments @ramsnake and @viewpanel .. I just changed my TPS less than six months ago at unique.. I dont think its TPS.. currently my fuel injector indicator lighted (yellow light) on once in a while and result in idling less than 1..

 

went to planet and he say its my injector and need to replace the whole set.. im currently think of doing body throttle service ?? anyone know what it does ?? and what the difference between body throttle service and fuel injector service ?

 

Fuel injector services is just to clean ur fuel injector nozzle.... IMHO, i dun think that is necessary. not much diff really. of course this is a highly debatable topic. many will agree with me and many will also argue with me. this is similar to the case of voltage stabliser uses...

 

My opinion... try to look at the few common revo fault n narrow down the problem. I reckon maybe u can look at the fuel pump.. sometimes may be the fuel pump crack n thus the fuel pump to loses pressure and cause ur idling to drop... this kinda thing need to open up n see. bring to an experience mech n tell them to check is better. fuel injector cleaning services wun solve this issue. good money earning for shop though...

[afi1605202481]

Fuel injector services is just to clean ur fuel injector nozzle.... IMHO, i dun think that is necessary. not much diff really. of course this is a highly debatable topic. many will agree with me and many will also argue with me. this is similar to the case of voltage stabliser uses...

 

My opinion... try to look at the few common revo fault n narrow down the problem. I reckon maybe u can look at the fuel pump.. sometimes may be the fuel pump crack n thus the fuel pump to loses pressure and cause ur idling to drop... this kinda thing need to open up n see. bring to an experience mech n tell them to check is better. fuel injector cleaning services wun solve this issue. good money earning for shop though...

 

Thank you @viewpanel for the detailed explanation. But i still got one more question. How about Body Throttle Service ? what does it do ?

[f-50evolution]

Thank you @viewpanel for the detailed explanation. But i still got one more question. How about Body Throttle Service ? what does it do ?

isnt throttle body and fuel injector the same

[Lim Ah Wan]

Anyone interested in getting a brand new black HJC CL-ST Full face helmet? Motoworld had a promotion whereby one is for $150, two for $200. So i bought two sets for $100 each. Anyone wants the other helmet can sms me at 8161 2124.

 

Model: HJC CL-ST Black

Size: L

Condition: 10/10

Price: $100

 

http://www.cyclenet-uk.com/images/HJC_CLST.jpg

[ramsnake]

Guys chillax ahhh. Dun just bcoz of battery u all wan to argue. I just asking when is the time for me to change battery. Btw thnx for the help. Peace

 

Eh?? No arguments here, mate.

I personally think of this as good healthy discussion about anything that concerns riding and the bike we ride. That's what the forum is for. To share facts and tips. It's better if we can justify what we're saying so everyone can understand better. If not, its ok too. Perhaps someone else can explain better.

 

thanks for the comments @ramsnake and @viewpanel .. I just changed my TPS less than six months ago at unique.. I dont think its TPS.. currently my fuel injector indicator lighted (yellow light) on once in a while and result in idling less than 1..

 

went to planet and he say its my injector and need to replace the whole set.. im currently think of doing body throttle service ?? anyone know what it does ?? and what the difference between body throttle service and fuel injector service ?

 

I'd recommend using a cheaper solution to injector issues. If it is clogged, use an injector cleaner that you pour into the petrol tank. I've used OWS injector cleaner before on my previous bike plus Shell VPower. It worked. By the way, this is the only product I recommend from that brand. There are other brands in the market such as FP60.

 

The trick with using injector cleaners is that you need to run the bike at high RPMs. This will force the fuel/cleaner mixture through the injectors with sufficient force. This process should dislodge any carbon build up or other stuff that might have cause the injectors to clog up.

 

As it is not easy to do the high RPM runs in SG on a 400cc bike without losing your license in the process, it is best to go in to Johor. Fuel is cheaper too.

Pump enough fuel at Petronas Gelang Patah to last for about 20km (1.5 litres).

Pour a bit of cleaner according to dosage on bottle.

After fueling, drag gears 2-4 up to 10,000+ RPM, cruise a while on 6th and gradually reduce speed.

Then repeat.

U turn at Gelang Patah and repeat. Refuel at Shell with VPower. Pour in recommended dosage of cleaner for full tank before filling fuel.

Ride back to SG.

Over the next few days, ride up to 7-8,000 RPM whenever you can.

When fuel is about 1/3 tank remaining, head out to 2nd Link again and repeat the process.

 

If it is the injectors that are clogged, you should be able to see some improvements before the 2nd refuel plus injector cleaner.

 

A note for others:

Bike engines are like muscles or the brain - if you don't use it, it will deteriorate. So, if you only ride in SG which typically means riding at low RPMs, do venture further once in awhile to "exercise" your bike...

 

FYI, I have not used any injector cleaner on my end-2008 Revo. I do ride at higher RPMs when going touring and I fill with Shell VPower every 3rd or 4th tank. Fueling on the bike has been good.

 

My opinion... try to look at the few common revo fault n narrow down the problem. I reckon maybe u can look at the fuel pump.. sometimes may be the fuel pump crack n thus the fuel pump to loses pressure and cause ur idling to drop... this kinda thing need to open up n see. bring to an experience mech n tell them to check is better. fuel injector cleaning services wun solve this issue. good money earning for shop though...

 

Unfortunately we can't tell if it is the fuel pump without removing it. If the pump is removed (high labour cost) you might as well change the pump.

 

@a'fi Have you tried asking Boon Siew if they can diagnose what's wrong rather than guessing? Maybe they have the diagnostic equipment they can just plug the bike in to see what's wrong.

[ramsnake]

isnt throttle body and fuel injector the same

 

Nope. Injectors are like the nozzle on a water hose. It injects fuel into the throttle body where it mixes with air before being sucked into the combustion chamber. The spark plug then fires the air/fuel mixture within the combustion chamber (above piston within the engine block) to produce force.

 

So fuel goes into fuel tank, which is pumped by fuel pump to the injectors which shoots the fuel into the throttle body in a fine mist (ideally). Clogged injectors result in fuel injected in non-mist form or less fuel being injector thus causing irregular combustion.

[xiaoyuer1988]

bros is malaysia shell 95 acceptable to pump on revo?

[kelena]

hi guys, sorry to trouble with yet a few other questions...

 

1. When I'm doing about 130kph (in a safe location which requires the little red book), my speedo momentarily get stuck and when my speed decreases..it "jumps" to the current speed. Is this a case where I have to remove the meter and do some lubrication to the needle? The surface of the meter, the one with the speed markings do not seem bent.. I dont suppose it's a speed sensor issue right?

 

2. When I'm free-wheeling, there's a tok tok tok sound.. very regular intervals..also evident sometimes when i reach out for the front brake levers..also very loud "tiak/tok" when I'm coming to/eventually stopping on a steep incline, facing downwards.. signs and symptoms of a busted wheel bearing?

 

Thanks for hearing me out!

[ramsnake]

bros is malaysia shell 95 acceptable to pump on revo?

 

Yes, Shell/Petronas and etc 95 is fine. Revo's minimum fuel RON is 92.

I usually alternate between 95 & 97.

Higher RON = better combustion = better power delivery.

About once a month, I'll pump VPower Racing (Shell MY) which has a 98 RON. This is because VP has some additives which help clean the injectors. When switching from 95 to 98, you'll notice the smoother power delivery too.

 

hi guys, sorry to trouble with yet a few other questions...

 

1. When I'm doing about 130kph (in a safe location which requires the little red book), my speedo momentarily get stuck and when my speed decreases..it "jumps" to the current speed. Is this a case where I have to remove the meter and do some lubrication to the needle? The surface of the meter, the one with the speed markings do not seem bent.. I dont suppose it's a speed sensor issue right?

 

2. When I'm free-wheeling, there's a tok tok tok sound.. very regular intervals..also evident sometimes when i reach out for the front brake levers..also very loud "tiak/tok" when I'm coming to/eventually stopping on a steep incline, facing downwards.. signs and symptoms of a busted wheel bearing?

 

Thanks for hearing me out!

 

1. I don't recommend spraying anything in the meter housing unless it's a quick drying type of lubricant. Oily stuff will attract dust.

If the speedo needle moves smoothly at other speeds, I doubt it's the needle mechanism. Trying doing 130 and above again and see if it happens again.

 

2. It's quite difficult diagnosing abnormal sounds on a forum but I'll try. LOL...

- Bearings

Where is the sound coming from? If it's the front bearings, you're likely to feel increased vibrations through the handle bars. Use something to prop up one of the fork legs and rotate the front wheel. If it's the front bearing, you will be able to hear the same sound or feel some vibration at the fork legs.

As far as rear wheel is concerned, you'll need to jack up the rear and spin the wheel. Same as front to replicate sound if it's rear bearings. Feel for vibration at the rear shock.

 

Two other likely source for what you've described:

- Check brake pads and brake fluid levels.

- Seized chain links. I think this is the most like cause. If you're not free wheeling or ride at above a certain speed, the sound would not be present. This is because at higher speeds, the chain is "forced" to mate with the sprocket teeth, thus less sound. When at lower speed, the seized link slots itself onto the sprocket teeth at a certain position thus making the sound.

Check that the chain links move freely pushing the chain up and down at the center of the chain between front and rear sprockets. Do this for the entire length of the chain to see if any links are seized.

[f-50evolution]

Yes, Shell/Petronas and etc 95 is fine. Revo's minimum fuel RON is 92.

I usually alternate between 95 & 97.

Higher RON = better combustion = better power delivery.

About once a month, I'll pump VPower Racing (Shell MY) which has a 98 RON. This is because VP has some additives which help clean the injectors. When switching from 95 to 98, you'll notice the smoother power delivery too.

yup agree. 98 is good cuz pretty powerful and smooth.

[vinz74]

hi guys, sorry to trouble with yet a few other questions...

 

1. When I'm doing about 130kph (in a safe location which requires the little red book), my speedo momentarily get stuck and when my speed decreases..it "jumps" to the current speed. Is this a case where I have to remove the meter and do some lubrication to the needle? The surface of the meter, the one with the speed markings do not seem bent.. I dont suppose it's a speed sensor issue right?

 

2. When I'm free-wheeling, there's a tok tok tok sound.. very regular intervals..also evident sometimes when i reach out for the front brake levers..also very loud "tiak/tok" when I'm coming to/eventually stopping on a steep incline, facing downwards.. signs and symptoms of a busted wheel bearing?

 

Thanks for hearing me out!

 

Hi bro, tok tok sound shld be yr front steering cone bearing. I encounter mine before, change the bearing n sound gone.

[kelena]

@ramsnake I tried again. this time the needle stuck momentarily at 110.. but funny thing is that there are no perceivable problems as the self-checking during start up of the bike worked properly.

I also agree solving sound problems over the net is not so efficient. and again, sound is pretty much subjective. I'm cursed with super-sensitive ears!

 

@vinz74 Thanks buddy, do you also have this problem when you were, say..stopped in the middle of the slope?

 

anyway, I've made an appointment with the bike shop to let them have a through look at it..

thanks again!