Author Topic: Problem at high revs (Read 5428 times)

bignoggin · « **on:** 29 April 2013, 10:51:58 am »

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 · « **Reply #1 on:** 29 April 2013, 11:58:17 am »

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 · « **Reply #2 on:** 29 April 2013, 12:20:06 pm »

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

Gnasher · « **Reply #3 on:** 29 April 2013, 12:24:32 pm »

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

red98 · « **Reply #4 on:** 29 April 2013, 12:25:38 pm »

bignoggin · « **Reply #5 on:** 29 April 2013, 01:19:47 pm »

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

darrsi · « **Reply #6 on:** 29 April 2013, 01:30:17 pm »

Quote from: bignoggin on 29 April 2013, 01:19:47 pm

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 · « **Reply #7 on:** 29 April 2013, 02:54:57 pm »

Quote from: darrsi on 29 April 2013, 01:30:17 pm

Quote from: bignoggin on 29 April 2013, 01:19:47 pm
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.......

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

unfazed · « **Reply #8 on:** 30 April 2013, 12:44:23 am »

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 · « **Reply #9 on:** 30 April 2013, 01:20:46 am »

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

bignoggin · « **Reply #10 on:** 30 April 2013, 11:44:48 pm »

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 · « **Reply #11 on:** 01 May 2013, 12:22:58 am »

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

darrsi · « **Reply #12 on:** 01 May 2013, 06:45:08 am »

Quote from: bignoggin on 30 April 2013, 11:44:48 pm

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 · « **Reply #13 on:** 08 May 2013, 04:51:13 pm »

any news ?

bignoggin · « **Reply #14 on:** 03 June 2013, 10:50:07 am »

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 · « **Reply #15 on:** 03 June 2013, 11:38:18 am »

Quote from: bignoggin on 03 June 2013, 10:50:07 am

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 · « **Reply #16 on:** 03 June 2013, 12:27:48 pm »

Quote from: red98 on 03 June 2013, 11:38:18 am

Quote from: bignoggin on 03 June 2013, 10:50:07 am
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

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

red98 · « **Reply #17 on:** 03 June 2013, 01:07:07 pm »

Quote from: ade the blade on 03 June 2013, 12:27:48 pm

Quote from: red98 on 03 June 2013, 11:38:18 am
Quote from: bignoggin on 03 June 2013, 10:50:07 am
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

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

.....read me like a book ,matey

....just glad i have the thou

bignoggin · « **Reply #18 on:** 13 June 2013, 04:35:46 pm »

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 · « **Reply #19 on:** 13 June 2013, 04:49:26 pm »

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

Fazerider · « **Reply #20 on:** 13 June 2013, 06:44:54 pm »

It might be worth having another look in the float bowls. If cleaning the carbs fixed the problem briefly, perhaps they're getting filled with more crap somehow. Have you changed the fuel filter?

Slaninar · « **Reply #21 on:** 13 June 2013, 06:53:14 pm »

Does that happen at lower speeds as well (1st and 2nd gear)?

red98 · « **Reply #22 on:** 13 June 2013, 08:04:02 pm »

Quote from: Fazerider on 13 June 2013, 06:44:54 pm

It might be worth having another look in the float bowls. If cleaning the carbs fixed the problem briefly, perhaps they're getting filled with more crap somehow. Have you changed the fuel filter?

me to.....might also be worth flushing the tank

Gnasher · « **Reply #23 on:** 13 June 2013, 09:36:33 pm »

Quote from: bignoggin on 13 June 2013, 04:35:46 pm

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?

This sort of statement is typical of a stealer mate don't ever go back in there they have absolutely no idea what their talking about............well they do to rip you off. Mate the chances are it's just more crap in one of the jets, see if you can get your mate to whip the carbs off again and clean all the jets.

bignoggin · « **Reply #24 on:** 13 June 2013, 10:02:41 pm »

I've cleaned the tank and put a new fuel filter on it when the carbs were cleaned, it bogs in most gears mainly in 1 2 seems to do it at high speed in 6th and also sometimes on motorway when trying to increase speed the shop I took it to an said it could be carbs worn said I should just get some off eBay off a fairly low miles bike and fit them myself instead of getting a carb repair kit