Problem at high revs

[bignoggin]

Hi my fazer 600 has developed a problem at high revs, when riding normally its fine but if i go past 8k theirs a point were it stutters/bogs then overcomes it, ive cleaned the carbs, replaced plugs, air filter and coils if anyone could give me some advice on whats wrong it would be much appreciated. 

[Dead Eye]

Oh dear, another poor stuttering Fazer As of yet, no definitive answer on this - there is a rather large 38~ page thread on this with no conclusion yet...

[darrsi]

What air filter are you using? Wouldn't be Hi-Flo perchance?
Was it happening before you cleaned the carbs?

[Gnasher]

Check that ALL the cold start plungers are fully returning on ALL crabs and the condition of the balancing tube caps. 

[red98]

:rolleyes :rolleyes :rolleyes

[bignoggin]

It was happening before i cleaned the carbs and i bought a genuine Yamaha filter.

[darrsi]

It was happening before i cleaned the carbs and i bought a genuine Yamaha filter.

Oh okay, i had a similar problem a while back and it turned out to be a carb inlet rubber had folded in on itself when it was refitted, but as it was carb number 3 it couldn't be seen. Every time i used to give the bike a bit of welly, or overtake, it would just bog down as described.
Just a thought.......

[Gnasher]

[quote author=bignoggin link=topic=7527.msg72508#msg72508 date=1367237987]
It was happening before i cleaned the carbs and i bought a genuine Yamaha filter.

Oh okay, i had a similar problem a while back and it turned out to be a carb inlet rubber had folded in on itself when it was refitted, but as it was carb number 3 it couldn't be seen. Every time i used to give the bike a bit of welly, or overtake, it would just bog down as described.
Just a thought.......
[/quote]


Yep that will do it too.  The symptoms described are pointing towards too leaner mixture. 

[unfazed]

Remove the the rubber plugs on the vacuum take off points and check them for cracks, they perish and crack and may need replacing.
Other issue may be loose plug caps, remove the caps and cut about 10mm of the end of the leads and refit the caps.

[darrsi]

Still sounds like a minor air problem to me.......

[bignoggin]

I've only just notice as well it's only started since I've had my alarm taken off by a local motorcycle shop could that have anything to do with it

[unfazed]

Check the old problem of loose or poorly reconnected wires after removal of the alarm.

[darrsi]

I've only just notice as well it's only started since I've had my alarm taken off by a local motorcycle shop could that have anything to do with it

Could always pop back and see them, and ask exactly what they plugged and unplugged, or maybe just quickly check over the bits they touched.
Make sure you haven't got a kinked fuel line anywhere, and it may even be worth changing your fuel filter for the sake of a few quid too.
Too much air can also mean not enough fuel, if you have a bit of crap in your filter you may be getting an intermittent blockage, which could be noticeable at high revs when the fuel needs to flow consistently for full effect.

[red98]

any news ? 

[bignoggin]

problem solved i got a mate of mine to clean the carbs properly for me, he notice that one of the main jets had some dirt in, the problem seems to be solved now and the bike still pulls like a train even with 65000 miles on the clock 

[red98]

problem solved i got a mate of mine to clean the carbs properly for me, he notice that one of the main jets had some dirt in, the problem seems to be solved now and the bike still pulls like a train even with 65000 miles on the clock 

nice one BIGNOGGIN      just in time for summer 

[ade the blade]

[quote author=bignoggin link=topic=7527.msg79464#msg79464 date=1370253007]
problem solved i got a mate of mine to clean the carbs properly for me, he notice that one of the main jets had some dirt in, the problem seems to be solved now and the bike still pulls like a train even with 65000 miles on the clock 

nice one BIGNOGGIN      just in time for summer 
[/quote]

why do i get the feeling that was said through very gritted teeth, mate?  :rollin :rollin :rollin :rollin :rollin :rollin :rollin :rollin :rollin

[red98]

[quote author=red98 link=topic=7527.msg79470#msg79470 date=1370255898]
[quote author=bignoggin link=topic=7527.msg79464#msg79464 date=1370253007]
problem solved i got a mate of mine to clean the carbs properly for me, he notice that one of the main jets had some dirt in, the problem seems to be solved now and the bike still pulls like a train even with 65000 miles on the clock 

nice one BIGNOGGIN      just in time for summer 
[/quote]

why do i get the feeling that was said through very gritted teeth, mate?  :rollin :rollin :rollin :rollin :rollin :rollin :rollin :rollin :rollin
[/quote]



:lol :lol :lol .....read me like a book ,matey :lol :lol ....just glad i have the thou   

[bignoggin]

went out on my bike the weekend and gave it some and its bogging again    a local bike shop said it could be the carbs have worn with age and because of the amount of miles my bike has done? what do other people think of this as ive ran out things it could be i think.

[darrsi]

What about the carb rubbers themselves, they can deteriorate over time, maybe worth checking for cracking or splitting causing too much air intake.