Bike starts then dies when revving throttle.

[apatia77]

Guys, I have this little problem since yesterday and I’ve only had the bike for 1 week now. The bike 2006 Honda CBF600, 8500 mileage, last service 1 year ago. Bike started just fine until yesterday after work, yesterday was my first time to ride in rain in the morning.

Bike starts fine from cold then dies when revving throttle, yesterday I tried to start it again few times and then it somehow started, this morning I had exactly the same problem. I am starting to freak out now.

To be honest I know nothing about bikes just how to ride them.

Thanks for help.

[eastanglianbiker]

are you letting the bike warm up before setting off or just jump on start and ride away as where the temp is dropping a little at night now a minute or 2 of ticking over will help start bike up then put ur helmet and gloves on that will give it a while to warm up see if that helps

[apatia77]

I would just start the engine and then ride the bike after 10-20 seconds. I will start it from now on and let it idle for 1-2 minutes without revving or anything. Will let you know how it goes.

EDIT: Can I also ask how to use the engine choke? Do I have to use it all the time or only during cold days? Do I just pull it out and then start the engine or start the engine first and then pull it out? Never had it on my 125 and it would always just start and ride without any issues.

[Guest]

I had similar once, turned out water had got in the kill switch.wd40 solved it. Worth a shot.

[eastanglianbiker]

as you have got choke on it use that pulled out to start the bike up the push halfway in put your gear on push choke right in should be ok to ride off

[Ingah]

Have heard people mention before that CBRs need longer on choke than normal (e.g. 1-2 minutes, instead of 10-30 seconds). Suspect EU emissions regulations having caused the problem.

Don't ride on the choke. Use that rule, and you won't go far wrong.

With a little experience of being in a hurry you should ind that you can keep the bike going from even from cold by keeping the throttle on a little at all times whilst it's warming up, including while stopped. Although by the sounds of it, your bike won't let you. Only time i ever encountered a bike not revving was my old CG125 (similar bike) and it was because i'd taken the carburettor apart and accidentally fitted the float needle upside down. But then it didn't work at all, and i doubt you've messed with the carbs, so i doubt it's that.

[NearOn]

I thought 06 CBFs were fuel injection though? Obviously not, am surprised.

[apatia77]

This might have to be due to cooler weather as other mentioned, I saw a video on youtube exactly with the same problem but different bike, it would just stall once adding too much throttle after starting a cold bike.

I have discovered another problem, there seems to be some small oil leak , at first I discovered some small drops of oil on my right boot and then after inspecting the engine today I discovered some small amount of oil, it seems it gets out from the draining bolt but I am not sure exactly, oil is only around there.

I will take the bike to local shop and see what they say.

[Ingah]

I thought 06 CBFs were fuel injection though?

 

They probably are

[Ingah]

This might have to be due to cooler weather as other mentioned, I saw a video on youtube exactly with the same problem but different bike, it would just stall once adding too much throttle after starting a cold bike.

I have discovered another problem, there seems to be some small oil leak , at first I discovered some small drops of oil on my right boot and then after inspecting the engine today I discovered some small amount of oil, it seems it gets out from the draining bolt but I am not sure exactly, oil is only around there.

I will take the bike to local shop and see what they say.

 

If it's from around the oil drain bolt, it'll likely be because of previous owners either having re-used the sealing washer (i believe it's also known as a crusher washer) too many times (should be replaced every time the oil is changed), or failing to put it back there at all!

[apatia77]

I took the bike to local shop, place where the bike was serviced 12 months ago, they said I didn't need any service etc as the bike has only done 1k miles since the last service. I am going to give my bike there for checks etc.

Also check the pictures. The oil is coming from here.

I mentioned the small leak and they cleaned the space around and when I got back to work I saw oil coming from this little place.

http://i945.photobucket.com/albums/ad292/apatia77/Random/1a.jpg

http://i945.photobucket.com/albums/ad292/apatia77/Random/2a.jpg

EDIT: washer replaced and the leak is gone now.

[Guest]

happend to me the problem was a pipe behind the petrol tank setting came off. I put back on and spot on now.

[Hywel]

I sometimes find it hard to get my bike started in the morning and I always found it tempting to crack open the throttle as soon as it catches but it seems like that actually drowns it and the bike cuts out again with some ugly gurgling wheezing noises. I found the best thing to do is put it on half choke and press the starter without touching the throttle (as long as your bike is mechanically ok it will eventually start if you leave it a little while before attempts), then leave it a good 30 seconds before going for the throttle to let the oil get round the engine, and for the temp to creep up slightly.

I ride a CB600F by the way so not a million miles away from yours.

[Guest]

Have the same problem with Suzuki VL 125 every now and then when its been left in the rain/been a few days since I was on it/its cold out. I solve it by whacking on the choke to get the bike started, let it run for about 30 secs, and if I then SLOWLY increase the throttle to full rev instead of jus grabbing a handful, it can reach top revs quite nicely. Helmet on, choke off, off you go.