deja vu !

[ade the blade]

sorry griff............yep checked all headers ( all four were nice and toasty ) so hopefully plugs ect are firing correctly. will try red`s suggestion with old filter, but will my blocking off idea work also ?

[ade the blade]

another idea has come into my fried bonce :lol  if i partially (just for testing purpose only), block off part of the air intake, then that in theory would richen the mixture up a bit and smooth out running issues wouldn`t it? (please say yes). thus confirming engine is running lean !!or am i just dreaming and this idea is a load of sweaty bo$$cks !!!!

everything in carbs as specced mate..............good try though !!

[ade the blade]

sorry griff............yep checked all headers ( all four were nice and toasty ) so hopefully plugs ect are firing correctly. will try red`s suggestion with old filter, but will my blocking off idea work also ?

checked with manual and did clear tube setting ( 3.5mm above bowl seam )

[ade the blade]

Just my quick two scents but I think someone mentioned that Fazers tend to run with a rich mixture as standard so the K&N should help more than hinder. I have one on mine (fitted last month) and it's definately got a bit more power BUT I did renew the exhaust system at the same time...

Actually, could restriction on the exhaust cause the issue? I am not a mechanic in any sense of the word. Hmm, though the Carb cleaner kinda puts a hole in my theory right?

thanks for your input fella.........if everyone could please bear in mind the k+n filter has been fitted in bike now for over 2 yrs with no probs whatsoever. no jetting or carb re-adjusting done at all in that time and its always run sweet as a nut like that. its only now that the gremlins have struck. i could understand if i`d only now fitted a new filter, end can, jets ect but this bike has run perfectly on the present set up with no issues at all.

[unfazed]

Out of curosity, will it rev with the choke on?

[keno]

I put a K&N filter in my bike 4 years ago with bog standard exhaust ran spot on, i have since changed the exhaust twice with stubby race cans and apart from popping on decel bike still runs perfect.
Just thought i would put that in the mix.. :rolleyes

[glynblue2]

When you say you have checked the plugs have you tried actually changing them? holding plugs onto a head and checking for a spark is NOT the way to check a plug is okay plus which have you checked the plug cap resistances,and also checking what colour the plugs are is a useless procedure if its not done correctly.as in its no use checking them when its been idling as there is a set procedure for checking plugs which is called a plug chop.

[ade the blade]

Out of curosity, will it rev with the choke on?

will rev very slightly better, but nothing near perfect. thanks

[ade the blade]

I put a K&N filter in my bike 4 years ago with bog standard exhaust ran spot on, i have since changed the exhaust twice with stubby race cans and apart from popping on decel bike still runs perfect.
Just thought i would put that in the mix.. :rolleyes

dont doubt it mate.........thats why i m baffled ( forgive the pun ) as filter has been in bike at least 2yrs prior to this without a hiccup. thanks anyway

[ade the blade]

When you say you have checked the plugs have you tried actually changing them? holding plugs onto a head and checking for a spark is NOT the way to check a plug is okay plus which have you checked the plug cap resistances,and also checking what colour the plugs are is a useless procedure if its not done correctly.as in its no use checking them when its been idling as there is a set procedure for checking plugs which is called a plug chop.

ok...just to clarify matters, plugs have been renewed as stated in initial post. cap resistors checked with multimeter. with regards plug check, i do know that bike idling for a long period of time will give a false reading ( usually nice and sooty ), thats why i managed to find a quiet stretch of road. took out plugs, cleaned and refitted. started bike and gave it a good blast up the road and killed the engine with kill switch and drifted ( coasted) to a nice silent halt. took out plugs and checked. otherwise known as a plug chop if i remember !!

[Bracechenko]

OK, some suggestions...

- Have you checked the inlet rubbers? Can't remember if you've answered that question but they can split and would cause your symptoms. Spray some WD40 on them whilst idling and see if the engine tickover changes. If it does, they're leaking

- By any chance has this all been during damp weather (god knows when!?!) as in the wet before I found that the spark was arking from a plug cap to the rubber flap as it was too close

- Could it be crap fuel? I know you've cleaned out the whole system but maybe it was a shite bit of fuel?

I'm out of ideas now lol  :lol

[ade the blade]

okey dokey...........now that the steam has stopped blasting out of my lugs, here is episode 2. managed to get a few hours in again to tinker about and tried out a few bods ideas. e;g refitting original air filter. all to no avail unfortunately. however, having studied plugs yet again ( bit of a sore point right now ) they did look very slightly `lean` so i went ahead and partially (approx 2/3 ) blocked off air intake with duct tape and took it out for a plug test :rolleyes . sure enough, as expected, plugs were becoming nicely(?) sooted. so i decided to give it a short test ride. apart from a very small hesitation at 4000 rpm, it managed to get up to the dizzy heights of 6000 !! and 70-80 mph (compared to the original 4000 rpm and 50 top end ) and then bogged once again .......no higher. still unable to give it a good handful if needs be. so apart from finally confirming its running pretty lean, im still at a loss,.........................................soooooooooooooooooooooooooooooooooooooo let the suggestions flow please. ( ak47 is loaded ready tonight   ) cheers once again Ade

[ade the blade]

OK, some suggestions...

- Have you checked the inlet rubbers? Can't remember if you've answered that question but they can split and would cause your symptoms. Spray some WD40 on them whilst idling and see if the engine tickover changes. If it does, they're leaking
all checked out............used 2 cans of carb cleaner nearly !!!!
- By any chance has this all been during damp weather (god knows when!?!) as in the wet before I found that the spark was arking from a plug cap to the rubber flap as it was too close
no sorry........bike has been kept in the dry.
- Could it be crap fuel? I know you've cleaned out the whole system but maybe it was a shite bit of fuel
doubt it mate, as at one point i siphoned all fuel out and run it through the other bikes with no probs whatsoever.
I'm out of ideas now lol  :lol  hey....i`m more than grateful for everybodys ideas/suggestions to get this b............ running sweet again

[Bracechenko]

It's a real puzzler!?!

Just thinking logically, it's lack of fuel or too much air. As you've studied those carbs in HUGE detail it's just got to be a leak somewhere along the air intake system. God knows where but perhaps there's a crack or god knows what at some point from filter to inlet?

You know that the bike runs fine with a K&N so it's not that. I just feel that you're clearly quite knowledgeable (way so more than me) so the obvious things have already been checked. That leaves the unusual and not so obvious things left I guess?

[ade the blade]

It's a real puzzler!?!

Just thinking logically, it's lack of fuel or too much air. As you've studied those carbs in HUGE detail it's just got to be a leak somewhere along the air intake system. God knows where but perhaps there's a crack or god knows what at some point from filter to inlet?

You know that the bike runs fine with a K&N so it's not that. I just feel that you're clearly quite knowledgeable (way so more than me) so the obvious things have already been checked. That leaves the unusual and not so obvious things left I guess?

quite right my mate..............probably linked in some way to the slightly warped front rotors :rollin :rollin :rollin

[Bracechenko]

:lol Well best of luck anyway, my time to stand down methinks hehehe!

[red98]

evening all...iam now pretty sure we have the same problem,iam also sure we`re in the right area....carbs...in my last post on my topic i was going to check the inlet rubbers again,as the carbs are off the bike at the moment this will be easy.ill be looking at the rubber o ring between head and rubber and may use a smear of sealent...i like you are running out of ideas....when you`ve finished with the ak47 could i borrow it. 

[Major Rant]

Mouse nesting in the exhaust ? (probably now an ex-mouse  :\ ).

Certainly sounds like an obstruction somewhere.

[ade the blade]

evening all...iam now pretty sure we have the same problem,iam also sure we`re in the right area....carbs...in my last post on my topic i was going to check the inlet rubbers again,as the carbs are off the bike at the moment this will be easy.ill be looking at the rubber o ring between head and rubber and may use a smear of sealent...i like you are running out of ideas....when you`ve finished with the ak47 could i borrow it.

ammo in the post ready mate !!

[red98]

cheers......boom,boom :rollin