CBR1000F cuts out at half throttle. Please help!

[imdying]

Here we have a book learner, and someone with years of real world experience.

I know which one I'd listen to.

[MSTRS:Me]

I think there's a difference between a cup of water sitting in the bottom of the fuel tank compared to a few globules in a carby bowl.
Obviously the system needs to be totally drained (tank, lines, carbs). but chances are there'll still be a small amount of water in there somewhere. Hence the IPA/meths trick to finish flushing it out.

[Katman]

but chances are there'll still be a small amount of water in there somewhere. Hence the IPA/meths trick to finish flushing it out.

Sticking the tank out in the sun or in front of the heater for a couple of hours will do the same thing.

[notme]

Here we have a book learner, and someone with years of real world experience.

I know which one I'd listen to.

Absolutely agree bud - but it's an open forum, and Katman is free to contribute.

Sorry, couldn't resist just one turn on the 'ol windemup handle!

Not sure what/who the book learning vs real world comment is actually referring to, but anyway staying on topic and trying to help the OP solve the issue:

Sticking the tank out in the sun or in front of the heater for a couple of hours will do the same thing.

lockhead83, please don't do this! If you take it all apart and want to get all the moisture out before reassembly, rinse the tank and any other fuel system bits with alcohol.

Katman - this is bad advice for many reasons. Remember that these threads come up on google searches and so on long into the future...

So, lockhead83 - any progress? For the same reason as mentioned above, if you've gotten closer to a solution a) it's interesting to know what the cause was, and b) it will help someone with a similar problem in future

[Katman]

Katman - this is bad advice for many reasons.

I'm assuming no-one's stupid enough to think I meant a gas heater.

I'm thinking more like the little fan heater that I use at work.

[notme]

Really? Care to list them?

Good point - I should do that for completeness shouldn't I?

Basically, if you say "put it in front of a heater" you can't guarantee the conditions, i.e. how far away, what type of heater, what duration. So with that in mind here's the list (well, the first few things that come to mind, there might be more)

1. Shouldn't need to be said, but gasoline + ignition source is not a good idea. A gas heater is an ignition source (duh) but less obviously - so is a fan heater, a radiant bar heater, a ceramic plate heater.....
2. Depending on the heater type, water vapour can be produced by it. Opposite of what we want
3. A radiant heater can heat one spot of the tank and not the rest. You only dry one part of the tank
4. A fan type heater can blow bits of whatever is around into the tank. Other chemicals in the air, bits of grit and crap. Not what we want in the fuel system.
5. May be a moot point if the tank is coming off anyway, but if the only reason it is coming off is to dry it in this manner, it's extra work for nothing
6. Heating of any rubber seals/hoses/gaskets attached to the tank might mean they need replacing - adding to the state of broken bike rather than helping!
7. You'll either have a motorcycle tank in the lounge or a heater in the garage. Tank in the lounge might get presents in it from the kids, might be hot to touch (unless you don't heat it much, in which case it's going to take ages to get the water driven off) and likewise a heater in the garage might mean it's running unsupervised or gets forgotten about.

Hence why rinsing the tank out with alcohol is just easier, quicker, better all round.

[notme]

I'm assuming no-one's stupid enough to think I meant a gas heater.

You do know the saying about assumptions.....?

[Paul in NZ]

I talked to Sam yesterday.

He found an airfilter house was not connected properly and now the bike is running much better. It was booked into a shop today but once the weather calmed down he was going to take it for a test ride and see how much better it really was and if that was still required.

I talked him out of tearing down the carbs (for now) - he does not have a garage etc to work in and the street is no place for that kinda job PLUS I really think he should just change one thing at a time and not potentially cause issues where there are none.

As a side note - I think Sams a recent arrival to our shores - he seems like a nice chap so lets make him welcome ;-)

[MSTRS:Me]

I talked to Sam yesterday.

He found an airfilter house was not connected properly and now the bike is running much better. It was booked into a shop today but once the weather calmed down he was going to take it for a test ride and see how much better it really was and if that was still required.

I talked him out of tearing down the carbs (for now) - he does not have a garage etc to work in and the street is no place for that kinda job PLUS I really think he should just change one thing at a time and not potentially cause issues where there are none.

As a side note - I think Sams a recent arrival to our shores - he seems like a nice chap so lets make him welcome ;-)

Good on ya Paul.
Nothing unwelcoming in here, is there? Just robust advice...albeit conflicting.

Yea - he doesn't need to strip the carby's at this point, but he should open the drain screws to empty the bowls. If his bike has a Prime setting on the fuel tap, it would be a good idea to let it run through the open bowl drains for a minute or two.
Outside, and somewhere that the petrol on the ground won't matter, of course!!

[Katman]

Outside, and somewhere that the petrol on the ground won't matter, of course!!

But not while he's holding a lit propane torch.


(Just to keep Allun happy).

[lockhead83]

@ ALL,

I have been a total jerk that I haven't updated you with any progress about the bike and the suggestions kept pouring in. Firstly THANK YOU all. Really appreciate your time n effort.

The solution was fvking simple: Trust me i fixed it..

I started ripping the bike off just to see what's in there (please before u laugh ur guts out, this is my first big bike n have been riding an old school all this while before jumping onto this one). I noticed the air filter outlet/duct was disconnected (Air duct and the case cover were siting at an angle instead of being connected. Shot me if you don't get it...lol)

I connected the two and put everything bike n BOY OH BOY... I got what I was looking for in my bike. She's fast and responsive like any other bike.

So the solution was pretty simply. I did check the fuel/vaccum and looked for any blockage in the tank a night before as suggested in the first few post and was assured that wasn't the problem.
To add more, to my surprise, even with a speedo showing 190 as the limit, i saw the rev meter going up from 6k to 9k. It felt fast...


Cheers!

[MSTRS:Me]

Aha! Well, who woulda thunk that?
CV carbs, eh? They don't like 'live' air. ie anything other than a (properly attached) airbox will adversely affect the performance.

[lockhead83]

I talked to Sam yesterday.

I talked him out of tearing down the carbs (for now) - he does not have a garage etc to work in and the street is no place for that kinda job PLUS I really think he should just change one thing at a time and not potentially cause issues where there are none.

As a side note - I think Sams a recent arrival to our shores - he seems like a nice chap so lets make him welcome ;-)

Thanks Paul for your help the other day.... It was precise and pretty accurate. N after that day, i didn't bother to look at the carbs or anything as the bike was going really nice.

Update 2: The bike broke down last night RIGHT OUTSIDE THE ferry terminal when I was about to head of for the rally... .. life is a bitch and I learned it the hard way...

What I did and all of you shouldn't. If everything is fine, don't be a superman. A day before I added the remaining carb/jet cleaner to a full tank of gas and took the bike out for a spin. What happened then: I was riding and felt like the bike was cutting down on power. So I pulled over and waited for 10 as this has happened before (couple of thou kms back when I added the first half of the bottle ) After 10 she popped up fine and saw some white smoke out of the exhaust. After few more Kms, it stopped again n then again. Now it started worrying me and I thought just a bad day ,better go back home .Finally when i decided it's time now, I must have ridden 3-4 kms and got stuck again on the motorway. This time she just wouldn't pop up. I was stuck there for 3 hrs and after numerous attempts, I killed my new battery. So had to get my bike towed and blah blah blah. It's sitting with Boyle Kawasaki and they'll look at it on wed. So fingers cross.

And all of you guys who passed by me the other day doing , SEE YOU IN HELL...... lol

Tk fellow riders. Might see you next wed.

Cheers!

[lockhead83]

All sorted now!
clogged valves n fuel supply with some crap....