[Discussion] CB400 SUPER FOUR HYPER VTEC Revo

[barbebushae]

Hello revo rider,

Pls enlighten me for the recommended gear shifting style for economy way . Example how may rpm and km/hrs change the gear 1 to 2. Etc... Thanks in advance

[Johnsonsp]

Hi guys need help here., I just bring my bike to boonsiew due to the fuel consumption is bad but after they done they say Don have any problems with it and my fuel consumption is like 15+-km/litre.

my riding style is 5 to 5.5k change gear. Nv open vtec. Any advice on how to improve on the fuel consumption

[raul7]

Hi guys need help here., I just bring my bike to boonsiew due to the fuel consumption is bad but after they done they say Don have any problems with it and my fuel consumption is like 15+-km/litre.

my riding style is 5 to 5.5k change gear. Nv open vtec. Any advice on how to improve on the fuel consumption

 

any aftermarket stuff like full system or air filter?

[Skuzz]

Hi guys need help here., I just bring my bike to boonsiew due to the fuel consumption is bad but after they done they say Don have any problems with it and my fuel consumption is like 15+-km/litre.

my riding style is 5 to 5.5k change gear. Nv open vtec. Any advice on how to improve on the fuel consumption

 

Honda quote 31km/L for the Revo, I presume this figure was obtained at a constant 50kph on a rolling road with no wind resistance & no ups & downs.

 

25km/litre is possible for the Revo in the real World but not much fun, 15km/litre is however very low....so.....

 

Firstly, there is no need to warm the engine for more than one minute (especially in your warm/hot climate). Just start the engine, wait a few seconds and ride.

 

Good fuel economy is about riding smoothly, get in to 6th gear at the earliest oportunity but don't lug/labor the engine. Try changing up to the next gear at 3.5k and get in to 6th gear as soon as possible. Constant stop start variations (like City riding) will use much more fuel than steady cruising at say 90kph.

 

Fuel can play a part, is high 99 octane fuel (like Shell V-Power Nitro) available? If so give it a try for a couple of tanks full, the ECU will take time to re-learn the fueling.

 

A more drastic/expensive measure would be to change the front (+1 tooth) and rear sprockets (-1 tooth). This will lower the revs a little and will help.

 

Aerodynamics: Maybe a small windscreen would help or try riding in a semi-prone position i.e. crouch down a bit.

 

Conclusion: The CB400SF does have a reputation for high fuel consumption. The brand new twin cylinder CB400 has much better economy at 39.7km/L. Less cylinders equals better fuel efficiency, some cars are now 3 cylinder for that very reason. I personally prefer the 4 cylinder and will pay the extra for that enjoyment.

Edited March 5, 2014 by Skuzz

[Johnsonsp]

any aftermarket stuff like full system or air filter?

 

bro don have now all still stock.

[Johnsonsp]

Honda quote 31km/L for the Revo, I presume this figure was obtained at a constant 50kph on a rolling road with no wind resistance & no ups & downs.

 

25km/litre is possible for the Revo in the real World but not much fun, 15km/litre is however very low....so.....

 

Firstly, there is no need to warm the engine for more than one minute (especially in your warm/hot climate). Just start the engine, wait a few seconds and ride.

 

Good fuel economy is about riding smoothly, get in to 6th gear at the earliest oportunity but don't lug/labor the engine. Try changing up to the next gear at 3.5k and get in to 6th gear as soon as possible. Constant stop start variations (like City riding) will use much more fuel than steady cruising at say 90kph.

 

Fuel can play a part, is high 99 octane fuel (like Shell V-Power Nitro) available? If so give it a try for a couple of tanks full, the ECU will take time to re-learn the fueling.

 

A more drastic/expensive measure would be to change the front (+1 tooth) and rear sprockets (-1 tooth). This will lower the revs a little and will help.

 

Aerodynamics: Maybe a small windscreen would help or try riding in a semi-prone position i.e. crouch down a bit.

 

Conclusion: The CB400SF does have a reputation for high fuel consumption. The brand new twin cylinder CB400 has much better economy at 39.7km/L. Less cylinders equals better fuel efficiency, some cars are now 3 cylinder for that very reason. I personally prefer the 4 cylinder and will pay the extra for that enjoyment.

 

thanks for the info. i will try it out on the next tank

[ki113r]

Good fuel economy is about riding smoothly, get in to 6th gear at the earliest oportunity but don't lug/labor the engine. Try changing up to the next gear at 3.5k and get in to 6th gear as soon as possible. Constant stop start variations (like City riding) will use much more fuel than steady cruising at say 90kph.

 

Was trying this method last night & this morning. Makes my ride very relax & the bike seems to be cooler than my usual riding style. However, it is almost impossible to do that during day time. Those drivers are almost kissing my tail, forcing me to drag gear & stay away from them.

[gundu87]

Was trying this method last night & this morning. Makes my ride very relax & the bike seems to be cooler than my usual riding style. However, it is almost impossible to do that during day time. Those drivers are almost kissing my tail, forcing me to drag gear & stay away from them.

 

Hi, New to this forum. Just got my s4 spec 1 few weeks back.

Totally agreed bro, riding relaxed is only possible late at night. I tried does this but cars overtaking me all the time. Dont feel safe this way. Rather stay away then be overtaken . spending bit more on fuel more worth than giving my life to those who don seem to check their mirrors/blindspots etc. haha

 

Got a ques for the bros here. Using high octane like ( shell v power and esso 8000) give better fuel consumption then lower grade fuel, with riding style the same and all other factors the same for both?

[HaiR1]

Hi, New to this forum. Just got my s4 spec 1 few weeks back.

Totally agreed bro, riding relaxed is only possible late at night. I tried does this but cars overtaking me all the time. Dont feel safe this way. Rather stay away then be overtaken . spending bit more on fuel more worth than giving my life to those who don seem to check their mirrors/blindspots etc. haha

 

Got a ques for the bros here. Using high octane like ( shell v power and esso 8000) give better fuel consumption then lower grade fuel, with riding style the same and all other factors the same for both?

 

 

 

Depends

 

 

A lot factor to consider

[gundu87]

Example? Care to explain bit more? Or if have articles link me up I go read up aso can

 

 

Sent from my iPhone using Tapatalk

[SparkerS1]

http://www.singaporebikes.com/forums/showthread.php/346588-FAQ-and-Information-about-Honda-CB400-Revo-NC42

 

This link will help you.

 

Singapore riding condition is also different due to many stop & go intervals when encountering traffic jams thus higher FC.

 

Smaller front sproc or bigger rear sprocket results in better acceleration but lousy top end.

( Good for urban/city riding )

 

Bigger front sproc or smaller rear sproc results in better top end but slower acceleration.

( Good for touring or long journey trips, good for daily expressway users )

( This setup saves fuel as engine will not be that stress compared to urban setup when travelling on expressway)

 

Lube the chain personally so that can monitor the chain and tires condition at the same time.

Ensure that the chain is not too loose and has enough chain slack for smooth ride.

Please tighten the chain if necessary.

[SparkerS1]

As what Bro HaiR1 mentioned, a lot of factors pertaining to better FC.

 

Need to ease on the throttle to get better FC and proper maintenance of the bike to ensure performance.

[Quittok]

Guys, I just skidded my Revo, is there a place to recommend for bike repairs?

[HaiR1]

As what Bro HaiR1 mentioned, a lot of factors pertaining to better FC.

 

Need to ease on the throttle to get better FC and proper maintenance of the bike to ensure performance.

 

 

 

Yeah man..

 

 

 

 

1001 things to look out for.. List is never ending

[origamii]

Guys, I just skidded my Revo, is there a place to recommend for bike repairs?

 

are u ok? go bikeworkz?

[safety first]

My friend had buy a revo last Oct. He say when he start his bike his rpm go up to 2 after awhile drop to 1.5 isit normal

He went back to his workshop the mech say it normal.

 

FC is very bad.

[safety first]

Wat is the rpm when warmup

And full tank petrol can go how much kms? ??

[HaiR1]

My friend had buy a revo last Oct. He say when he start his bike his rpm go up to 2 after awhile drop to 1.5 isit normal

He went back to his workshop the mech say it normal.

 

FC is very bad.

 

 

 

Normal

 

All EFI bike will have auto choke when u cold start it..

 

Rpm will drop after a min or so, or when bike idling stable

 

 

Consumption varies.. 1001 reason can be the cause

[Quittok]

are u ok? go bikeworkz?

 

Thanks for your concerns, quite a fair amount of abrasions and bruises but luckily nothing broken. Thanks for your suggestion I decided to put at PM and let Ah Chong handle it.

[SparkerS1]

Wat is the rpm when warmup

And full tank petrol can go how much kms? ??

 

Rpm during warm up is 2k and will drop back to 1.4k

 

14litres I go around 280-290km.

 

Your FC bad is how bad?

how much km/L of fuel?

[SparkerS1]

By Bro HaiR1

 

 

Possible reason for bad fuel consumption :

 

 

-Airfilter (Dirty/ Clogged up)

 

-Spocket (Worn out/ Not standard size)

 

-Chain (Not lube/ Chain too slack/ tightened)

 

-Tyre (Worn out/ Incorrect Pressure) ( Wrong size)

 

-Tyre Valve (Leaking air)

 

-Wheel bearing (Not in good condition)

 

-Engine Oil (Wrong grade/ Due for change/ Too much)

 

-Carburetor (Air/ Fuel not balanced) (Jetting not stock)

 

-Fuel (Contaminated/ Low grade)

 

-Fuel line/ filter (Clogged)

 

-Meter (Inaccurate/ offset)

 

-Rider (MotoGP mood/ Fuel-conscious type)

 

-Clutch (Clutch plate/ spring worn out)

 

-Header Gasket (Worn out)

 

-Weight (Heavy luggage/ pillion/ rider)

 

-Idling (Too High/ low)

 

-Engine braking (Too much)

 

-Abrupt braking

 

-Hard acceleration

 

-Engine condition (TOO much to explain)

 

-Brake Caliper/ Brake pad (Brake Caliper piston jammed?/ not free)

 

-Improper suspension set-up (Too hard/ Too soft)

 

-Servicing (Do on time, dnt overdue)

 

-Idle too long (Waste petrol/ Engine hotter/ coolant affected unnecessary/ WaterPump work harder to maintain temperature)

 

Tats all I can think off, for now.

[HaiR1]

By Bro HaiR1

 

 

Possible reason for bad fuel consumption :

 

 

-Airfilter (Dirty/ Clogged up)

 

-Spocket (Worn out/ Not standard size)

 

-Chain (Not lube/ Chain too slack/ tightened)

 

-Tyre (Worn out/ Incorrect Pressure) ( Wrong size)

 

-Tyre Valve (Leaking air)

 

-Wheel bearing (Not in good condition)

 

-Engine Oil (Wrong grade/ Due for change/ Too much)

 

-Carburetor (Air/ Fuel not balanced) (Jetting not stock)

 

-Fuel (Contaminated/ Low grade)

 

-Fuel line/ filter (Clogged)

 

-Meter (Inaccurate/ offset)

 

-Rider (MotoGP mood/ Fuel-conscious type)

 

-Clutch (Clutch plate/ spring worn out)

 

-Header Gasket (Worn out)

 

-Weight (Heavy luggage/ pillion/ rider)

 

-Idling (Too High/ low)

 

-Engine braking (Too much)

 

-Abrupt braking

 

-Hard acceleration

 

-Engine condition (TOO much to explain)

 

-Brake Caliper/ Brake pad (Brake Caliper piston jammed?/ not free)

 

-Improper suspension set-up (Too hard/ Too soft)

 

-Servicing (Do on time, dnt overdue)

 

-Idle too long (Waste petrol/ Engine hotter/ coolant affected unnecessary/ WaterPump work harder to maintain temperature)

 

Tats all I can think off, for now.

 

 

 

 

 

Thanks man..

 

👍

[WhoIM]

Hi, a noob question here. is the revo still haf the "vtec" effect lyk spec 1-2 aft certain RPM ? and for revo haf what aftermarket pipe is legal. Thanks

[robinwood]

Hi all,

 

Just get my spec3 around 1 month, 6.5 years bike, ~ 115k km mileage.

I have some doubt on issue below, may u share if u have idea on it. Thanks a lot.

1. Clunky gear shifting

I heard that shift from N to gear 1 have a rough clunky sound is a normal, But if hard acceleration and shifting to gear2 also feel very rough clunky. If carefully and slowly shift to gear 2, mostly it is smooth and comparable silent a lot. Shift to gear 3 is always rough clunky. Shift to gear 4 is same condition as shift to gear 2. But shift to gear 5 and 6 are quite silent and smooth every time. Down shifting to every gear is also smooth and silent. Is it normal? I checked with shop and colleague who ride high cc bike as well, they said is normal.

2. Vibration when rev to high rpm and didn't shift up the gear but release the throttle, sometimes vibration sometimes no, is it normal?

3. Encounter after start and warm up and engine, engine stall and bike move forward while shift up from N to gear 1. The clutch is pulled and havent released yet. Any advise?

[Skuzz]

Hi all,

 

Just get my spec3 around 1 month, 6.5 years bike, ~ 115k km mileage.

I have some doubt on issue below, may u share if u have idea on it. Thanks a lot.

1. Clunky gear shifting

I heard that shift from N to gear 1 have a rough clunky sound is a normal, But if hard acceleration and shifting to gear2 also feel very rough clunky. If carefully and slowly shift to gear 2, mostly it is smooth and comparable silent a lot. Shift to gear 3 is always rough clunky. Shift to gear 4 is same condition as shift to gear 2. But shift to gear 5 and 6 are quite silent and smooth every time. Down shifting to every gear is also smooth and silent. Is it normal? I checked with shop and colleague who ride high cc bike as well, they said is normal.

2. Vibration when rev to high rpm and didn't shift up the gear but release the throttle, sometimes vibration sometimes no, is it normal?

3. Encounter after start and warm up and engine, engine stall and bike move forward while shift up from N to gear 1. The clutch is pulled and havent released yet. Any advise?

 

All Hondas I've owned have clunky gear shift especially from neutral to 1st as you described. First try adjusting the clutch on the handlebar adjuster. If no success maybe the engine oil is not the correct grade i.e. too heavy like 20W50SAE, the spec 4 bike uses 10W30SAE. Try a fully synthetic oil of the correct grade for your bike stated in the owners handbook.