Over fuelling carbs fixed...

[Kurt999]

...and it's so simple. For those of you that read this...

http://www.vtr1000.org/phpBB3/viewtopic ... oubleshoot

you'll know that after fixing several problems with the bike, the front cylinder was massively over fuelling for no apparent reason. Even a carb cleaning and refurbishing company couldn't find a fault. And no one here suggested this fix, which leads me to believe that either I am very stupid and just should have realised what I had done, or that no one else has ever inflicted this fault on their bike.

Anyway, I had read some advice regarding the float bowl vent tubes that pass through the side plates that hold the carbs together and sit in the gap between the carbs, loosely banded together. The advice was to allow the ends of the pipe to hang downwards...I can't remember why now but it made sense at the time. So I had pulled the rubber bands from around the pipes and pulled the pipes back through the carb mounting plates. I then ran them over the top of the plate, allowing the open ends to hang vertically in the gap between the carbs. Consequently, when the airbox was bolted down it pinched the front carb vent tube against the carb mounting plate. I guess that because the float bowl couldn't vent properly a partial vacuum was forming above the fuel in the float bowl which was holding the float up and causing the front cylinder to flood. I can't believe that I didn't figure it out before, but I just re routed the offending hoses and went for a ride and all my over fuelling symptoms have gone and the bike rides fine.

I feel a bit stupid for not realising this ages ago but thought I'd post this in case someone else has problems like this.

[macdee]

its great that you found the bugger and good man for posting the problem on here
it will always help someone else down the line
i never would have thought of this problem

[sirch345]

Cheers for the feedback on that problem Kurt They say it's quite often the simplest of things that catch you out. It seems that is the case here.

Good to know for others as you say, well found

Chris.

[bigtwinthing]

Well done for finding it. I have to take photos of everything before i strip it , as i have a memory loss issue since having my Chemo etc,
Its buggered me up so i have to put things in place to remind me always. Not complaining just making allowances. Its helps too.

My car port is "Post it note City"

[Kurt999]

Thanks to all for not calling me an idiot lols!! I did take photos of everything but moving the pipes was a conscious decision on my part based on info that I read here and on the superhawk forum. Just should have moved them to the right place!!

So glad its fixed, I can actually get out and ride now...woohoo!!!

The next project will be a TL1000R drag bike to compete in the Supertwin Et class for next year. Gonna be long, low, airshifter and nitrous oxide. I know its not a storm but I'll start a build thread once I've got the bike if thats ok? I'm off out on the Storm now for an evening blast through the Kent countryside

Later people

[bigtwinthing]

Thanks to all for not calling me an idiot lols!! I did take photos of everything but moving the pipes was a conscious decision on my part based on info that I read here and on the superhawk forum. Just should have moved them to the right place!!

So glad its fixed, I can actually get out and ride now...woohoo!!!

The next project will be a TL1000R drag bike to compete in the Supertwin Et class for next year. Gonna be long, low, airshifter and nitrous oxide. I know its not a storm but I'll start a build thread once I've got the bike if thats ok? I'm off out on the Storm now for an evening blast through the Kent countryside

Later people

avoid all the cabbages!!

[lloydie]

You prat we've all done things like that at some point and it ads the learning curve :-)

[AMCQ46]

that one could have been impossible to find as every time you lift the airbox to inspect the trapping issue would go away!.

you did well to find it and thanks for posting up the results so others don't have to struggle

[Kurt999]

You prat we've all done things like that at some point and it ads the learning curve :-)

Hahaha thanks, I feel like I fit in here now lols!!!

[Kurt999]

that one could have been impossible to find as every time you lift the airbox to inspect the trapping issue would go away!.

you did well to find it and thanks for posting up the results so others don't have to struggle

Exactly, and strangely there was no witness mark left on the pipe to even give a clue that that was where the problem was. I'm actually a half way decent mechanic (not that some of my beer fuelled ramblings on this forum give that away ) but this really baffled the hell out of me for ages.

[tony.mon]

It's good when you have that "I wonder if it's as simple as...." moment

[VTRDark]

OMG So where the vent lines not even running through the holes in side plates then. I've not heard of that issue only the vents causing flooding under heavy breaking from where they are constricted in the side plate holes.

Glad you got it sussed in the end.

(:-})

[Kurt999]

OMG So where the vent lines not even running through the holes in side plates then. I've not heard of that issue only the vents causing flooding under heavy breaking from where they are constricted in the side plate holes.

Glad you got it sussed in the end.

(:-})

No, the vent lines were not running through the holes in the side plates. What I had done, in the interests of keeping things neat, was to pull the tubes out of the side plates, then pass them over the top of the plates so they vented downwards between the plates in the space between the carbs where they would normally be horizontal. The design of the airbox crimps the front vent tube off when it's secured onto the carbs which causes the flooding issues.

I now have a bald patch from all the head scratching!!

[VTRDark]

I now have a bald patch from all the head scratching!!

Join the club were all bald on here except for the odd couple of hippies

Well done on discovering that. They must have been like that when you purchased the bike otherwise you would have seen where they run through.

(:-})

[thunderbolt]

Carl, I think he means the pipes were running through the holes in the sideplate originally but he removed them and ran them over the top of the sideplate and that is when the front one got pinched and caused the over fuelling.