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Cutting out when accelerating hard

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skid11
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Cutting out when accelerating hard

#1 PostAuthor: skid11 » Mon May 30, 2016 6:30 pm

My 900 has just started cutting out momentarily when accelerating.It only happens when I give it a big handful and when its ridden more sensibly it has no problems
It kicks back in straight away when I ease off the throttle.It ticks over fine and seems to be charging ok.I can ride round the problem by riding slower but I would prefer to sort it :)
It has what look like the original points system fitted.
Its used almost daily as well so would like a long term solution
I am thinking an electrical problem with those symptoms?
Got a dyna s and taylor leads on the 1000 so tempted to go that way on the 900
Any ideas ,thoughts as to the cause or solution would be appreciated
Cheers
Sean

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Tonka
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#2 PostAuthor: Tonka » Mon May 30, 2016 7:17 pm

Fuel tap is the most basic thing to check first
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Pigford
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#3 PostAuthor: Pigford » Mon May 30, 2016 7:22 pm

Tonka wrote:Fuel tap is the most basic thing to check first


+1 ... Sounds like fuel starvation :|
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skid11
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#4 PostAuthor: skid11 » Mon May 30, 2016 7:42 pm

Its an original tap but seems ok...any ideas why it would only do it when really winding it on..i ask because they were ok back in the day ...I do appreciate it is nearly 40 years old..fuel tap has gone a bit stiffer but just thought that was normal wear and tear
I would be ok with a pingle tap
Thanks for the responses guys :)

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PAULJAC47
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#5 PostAuthor: PAULJAC47 » Mon May 30, 2016 8:17 pm

Fuel flow,poss part blocked filter,part blockage to fuel cap breather,float heights?

Hows things Sean,a little bird tells me you are a 13 owner now!
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skid11
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#6 PostAuthor: skid11 » Mon May 30, 2016 8:36 pm

PAULJAC47 wrote:Fuel flow,poss part blocked filter,part blockage to fuel cap breather,float heights?

Hows things Sean,a little bird tells me you are a 13 owner now!

Things are good....bought ade's 1300....been after one for a while
fuel starvation was my initial thought...just runs so well other wise :) )

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z1bman
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#7 PostAuthor: z1bman » Mon May 30, 2016 9:25 pm

fuel level low or emulsifying tubes partially blocked

johny brando
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Re: Cutting out when accelerating hard

#8 PostAuthor: johny brando » Wed Jun 01, 2016 7:27 am

skid11 wrote:My 900 has just started cutting out momentarily when accelerating.It only happens when I give it a big handful and when its ridden more sensibly it has no problems
It kicks back in straight away when I ease off the throttle.It ticks over fine and seems to be charging ok.I can ride round the problem by riding slower but I would prefer to sort it :)
It has what look like the original points system fitted.
Its used almost daily as well so would like a long term solution
I am thinking an electrical problem with those symptoms?
Got a dyna s and taylor leads on the 1000 so tempted to go that way on the 900
Any ideas ,thoughts as to the cause or solution would be appreciated
Cheers
Sean


Sean, Theres no Silver bullet or Quick answer to this sort of Misbehaviour !!!! Gotta admit I too am leaning more towards electrical ...as a carb issue would normally show signs & symptoms more like ...... hesitation ,holding back,coughing & not an ON/OFF like occurrence that your detailing.
Doe's it appear any worse the hotter the bike gets ?.....electrical componants ( coils & condensers, Ignition Boxes etc ) commonly but not always break down when they get warmer or hot ? You indicate you have a Z1000 ! If this is the case (well thats a real Bone Arse ) this will make it easier for you to find the culprit. One item at a time start swapping em out (fit & try Test/Ride it, then move onto the next part n do the same ! )..... either your carbs ( as a complete lump ) or your ignition, it doesn't really matter aye what one's first ! ...When you start on the ignition.... try the Coils first... then Back plate & whatever system is attached. Ensure when you evaluate the swapped item you put it under the exact same conditions each time i.e. Apples for Apples. By nature of the fault this ...it's best dealt with like this ...a process of elimanation for this sort of issue is the way to go but be prepared it could end up being a Curly one ......like say a loose ignition switch connection or (maybe even ...say soldered joint in Ignition switch itself ) ... or a dodgy kill switch button. What I'm saying is it could also be a vibration driven defect .Eventually you'll have a Eureka moment mate . Cheers, Johny B.

skid11
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#9 PostAuthor: skid11 » Wed Jun 01, 2016 7:04 pm

Thanks for the replies I know internet diagnosis is at best difficult:)
It is a very much on/off problem..everything else carb wise seems fine..i have checked the tap and fuel lines and best as I can they seem ok...cleaned the carbs 18 months ago and used it regularly since
Johny b..thats a good plan...I will take the bits off the 1000 and try them..one step at a time..
It seems to fail only under full load if that's the correct description?


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