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Discussion Starter · #1 ·
Hi..this is my third post on this forum. I've been browsing and reading this forum to troubleshoot my bike for quite 3-4 months already but cannot post anything due to registration problem. Great job for the website upgrade, admin..thanks.

I'm from Malaysia, owning a used 2011 CB1000R with 18000km odometer when bought, and currently at 25000km. It's a grey import bike as compared to current new Neo Cafe model. As such, the bike is poorly maintained when I bought it, and quite rare too. This is just a sharing on what i have been through on maintenance of this bike. First of all, i would like to thank to all of the senior forumers for sharing quite detailed solution for various problems on maintenance. To date, i've made a copied reference from this forum up to 14 pages of MS word.

My first problem out of the shop is rough idling, the engine sputtered and died about 3 kilometres away. I thought maybe it's just because of running out of fuel. The fuel meter was flashing like in manual book. After a full tank, the bike ran happily back to its new home. The horror came the next day when I'm on highway. After about 15km, the engine loss its power, until 1km later, it stuttered like crazy and died. After a brief check, it ran again, only to repeat at the next 10-15km. You can guess how much i was disappointed..my trip to work is 70km one way. While running in lane splitting, the bike died, and i just pulled the clutch, started the engine and it ran again.

The next working day, after a self clean up of DNA air filter at home, the bike went to workshop. After 3 days, the mechanic happily told me that they had replaced faulty fuel pump with a new one, clean up the fuel tank, and the fuel injectors. I had to bear the cost as it is a used bike..around MYR1500 / USD350..

The bike runs for around 2 weeks, with rough idle, until the problem repeats again. this time, it stayed for another 3 days at the same workshop and they just replaced a worn out fuel pump hose for free..

The rough idle and sputtering still happen at low rev..between 3000 - 4500 rpm. at above 5000rpm, the bike runs smoothly. When i went to same workshop (as it is the only "trusted" big bike shop in my state..not anymore now), the mechanic was out of idea and suggest that i checked for faulty ECU at Honda service centre HQ. That night i self checked the bike and accidentally disturbed its TPS sensor. Yeah, the bike went crazy, wont start, and choking black smoke with fuel dripping from exhaust tip (burnt).

I went to the Honda service center (SC), quite far from my home, with the bike runs roughly. Fuel consumption was very bad, need to refuel full tank after just 80km. At the SC, the bike stayed for 5 days and had full service, ECU reset..and to my astonishment, the main problem was just 'very dirty' fuel tank and fuel pump. The cost of cleaning was dirt cheap as compared to previous workshop..MYR100 only/25 dollar.

Now my bike runs very smooth, and can easily reach 200kmh like in those youtube top speed video.

I learnt a lesson here..those sputtering, stuttering, rough idle, chugging when in low speed problems is due to dirty fuel in rusty fuel tank. There is no problem with the engine, clutch, TPS sensor, spark plugs, battery, or other electronic issue. I've been reading the problems shared by others here for months, and have considered many solutions and suggesting it to the mechanic. I've even considered changing the bulky catalytic converter which might be clogged due to dirt. However, i learned a lot on maintenance of this bike from this forum. gracias..arigato gozaimasu..:)

Is there anyone having the same problem with what I've shared?
 

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Hello there, the picture above is mine pump inspection and the result as you can see : dusty/rusty...With experiences for motorcycle in my country (Vietnam), there are some of reasons:
1/ Quality of petrol
2/ Water from outside running into the tank by somehow (raining, washing,...)
3/ The bike stay at garage too long, with full of old petrol in tank...
Since the "environment" of your country as same as my country, I'd say you are facing the same problem with me as well. Cheer!
 

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Discussion Starter · #3 ·
Sorry, i was a bit busy and forget to look at this forum. Last time i check (maybe 7 months ago), there was no reply, and i assumed that no such problem happen. Maybe it's just bad luck.

Thanks Anh Nguyen. Yes, as i thought so, the italian bike might have different reaction to corrosion/rust/wetness condition of weather in both our countries. But after a year maintaining this 10 year old bike, it's not such a big deal.
 

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Discussion Starter · #4 ·
My bike failed to start again last week. I just came back from a spirited ride with speed at 180-200km/h. When i fired it up again after reaching home during the night, the fuel pump failed to give a whizzing sound like usual although the engine is cranking. a few days later, the bike started for about 1 minute then died again. it's the third time the fuel pump failed, just like last time, but this time there is no such warning or hint of sluggish behaviour at low rpm or at highway cruising speed.

at first i thought the battery is weak and need to jumpstart the battery like a car, or pushed down the hill like a carb bike...well just trying. later i got info that it was useless and not recommended. So, instead of having to pay another 100dollar to service the pump and tank, i decided to DIY. there's not much info from this forum (browsing more than 2 hours). i learnt basic cleaning for fuel pump from youtube for different motorcycle, and 6 hours later..the bike fired up happily. the battery need to be recharged for 2-3 hours too. this time, i used a simple RM20 (5dollar) carb cleaner spray on the fuel filter and pump. i'm not a mechanic and too stupid to learn about engine at this age, but this bike, as simple as it is, is very easy to operate/manage.

next on my list is to replace the battery with lithium ion, as what other members here suggested, "the stock battery is not man enough to fire up all at once including the fuel pump". i noticed that if the bike is used in short distance, the battery quickly gets weaker, as if not being charged properly.

Thanks for reading. please leave a reply if you have the same situation like my bike
 

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Discussion Starter · #5 · (Edited)
List of repairs done to my (used/2nd hand) bike:
Repair #1: Change fuel pump unit, clean fuel system, clean tank
Repair #2: Change worn fuel pump hose
Repair #3: ECU reset, clean tank and fuel pump
Minor accident repair: fix scratch to rear seat, foot brake lever, engine cover, right handlebar
Repair #4: Change rear wheel hub dampener
Repair #5: Fix battery positive connector
Repair #6: Clean fuel pump and recharge battery
Repair #7: Change new battery (not needed), fix fuel pump wiring connector
Repair #8: Repair fuel pump - torn rubber grommet
Repair #9: Dyno run, change 4 iridium spark plug (1 faulty)
Repair #10: Replace faulty, rusty, incomplete fuel pump set with new fuel pump set (from eBay)

Bike run smoothly again..

Note: there is no such thing as lumpy idle due to battery, exhaust muffler, injector, idle reset, blocked fuel breather, TPS, clutch fluid, crank sensor, clutch switch, neutral position sidestand, PCV, coils, fuses, lean fuel, cables, mapping, air filter, and stepper motor..

It is as simple as just replace your damn fuel pump 1 whole set with a new one.
 
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