anyone out there really clued up on zx7r

[SPIKEYMIKEY]

as mine has been in two garages and has still not been fixed has had three sets of carbs and new set of needles and rolling roaded and still has the hesitation it was like a bucking bronko bike has been in there 4 months now pulling my hair out now happy xmas guys

[Noxious89123]

People can't help you with the problem if you don't tell us what the problem is

Merry christmas.
____________________
'06 Honda CBR125RW-6 ~ '00 Honda CBR600F-Y ~ '07 Honda CBR600RR-7 ~ Bikeless
'53 Ford Ka 1.3 ~ '03 Vauxhall Astra SRi 1.8 ~ '52 Vauxhall Astra SRi 2.2 ~ '53 Vauxhall Astra GSi

[Lipsmoker]

[SPIKEYMIKEY]

its a zx7r p2 model it started of buy have a hesitation so i was not happy with it as it was quite dangerious so i booked it in to a garage as i took it as far as i could without a dyno so when it went it to the first garage they rolling roaded it and said it was running to rich and could not lean it down as the emoulsion tubes were worn in carbs so that cost me £160 they said get another set of carbs so this is what i did so took it to another garage as i was not happy with the one had been two so another set of carbs fitted rolling roaded and then get a call to say that the carbs i brought needed new needles as same again was running two rich so new needles fitted set up again got a call say all done picked it up riding it home and no joy was even worse was like riding a bucking horse shocking scary as hell so took it back so he insisted that it was still fuel related so my friend had a set of carbs he said worked fine so dropped them of fitted no god so returned to the set with new needles and still cant work out why its like it he said it some times rubs fine then changes back again sorry this is long windid

[Lipsmoker]

I think Noxious89123 should help you with this one.


I can only reccomend this
https://en.wikipedia.org/wiki/Punctuation

Merry Christmas
____________________
Four wheels move the body. Two wheels move the soul.

[SPIKEYMIKEY]

will try and pm him cheers have a good one

[mab]

Lets see if I can make your post a little clearer

[Drake]

any modifications to the exhaust system or engine?
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was: derbi senda, aprilia sx125, nsr250 mc16, cagiva mito, cb600 hornet now: mk1 bandit, KR1S, landrover series 3 light weight 2.5 petrol, 5speed box

[hornetmike]

any leaks on inlet rubbers or air box ?

Bucking could be a miss fire under load, check HT leads and coils
____________________
87 Honda CG 125 - 97 ER5 - SR 50 -81 Z250- 96 CBR 600 F- 94 GPX600R 88- GPX 400R- 87 GS 125 - 2006 Honda CB600F- 2003 ER5 - Honda CBF 1000 2009 - Honda CBR 600 RR 2011
Current BMW R1200GS 2010

[robocog]

Or if it has been running rich to the point of plug fouling/wetting....throw those plugs away and put new ones in

I chased a similar fault and did everything BUT change the plugs...after spending loads of hours and cash changing wiring, earth paths, coilpacks , HT leads , re-flashing firmwares on the ignition etc....a new set of plugs 100% sorted it (once I discoverd and rectified why my plugs were getting fuel wetted under certain conditions)

after I had discovered (think it was either a Dave Vizzard or Dave Walker article I read) that once plugs get wet to the point of shorting they can create a micro path in the insulation they are in fact 100% junk reliability wise and no matter how much heating them cherry or blasting them or meticulously polishing/cleaning them - you are on to a loser till they have been replaced - even if they spark like good uns outside the engine

Regards
...and Merry Xmas
Rob
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Needs a bigger garage...

[SPIKEYMIKEY]

Has had new plugs ,garage has run the bike with the air filter with out it being oiled and with it being oiled ,run on dyno with & with out fuel tank ,run with out fuel pump,checked all pipes one was missing but replaced and not made a difference.this garage is a place called Race tec engineering they are supposed to be highley recommended i belive that the bike is cursed lol
mods done full akropovic exhaust system,k&n filter.
Hope this helps you guys more .
have asked the guy wear it is at if it is electrical and he said no its fuel related .

[Noxious89123]

Well if it's running rich there are two ways of looking at it;
Something is causing it to aw in far too much fuel...
Or something is stopping it getting enough air.

Leaking inlet rubbers or airbox would cause it to run lean, as would aftermarket filter and exhaust if I am correct...

Also, Lipsmoker was just being a smartarse as he couldn't/wouldn't decipher your post I am far from an expert, merely willing to try and help

The sets of carbs you tried, were they brand new or second hand? The reason I ask is did they have the standard needles and jets? If they had been messed with then it would just make finding the problem harder. The carbs you borrowed, were they from the same model of bike? (Silly question as I imagine they were).

How is the bike to start? Does it start from cold without the choke or not? If you take out the spark plugs, what colour are they?

How did the mechanics you took it to decide it was running rich? I'd have thought that if it wasn't firing properly then you'd get alot of unburnt fuel in the exhaust, making it look like it was running rich? (Someone tell me if I'm talking crap here, I'm just trying to think logically)

Really need someone like kickstart or stinkwheel in here

EDIT: Will it run without the airfilter? My otherhalves 125 would run like a bag of shit with the filter in but was fine without it. Also, have you checked that the air ducts aren't blocked?

Have you still got standard exhaust and air filter? Also, is the Akrapovic just a slip on end can or entire system?

Importantly, when did the problem start? Had you made any changes to the bike recently before?
____________________
'06 Honda CBR125RW-6 ~ '00 Honda CBR600F-Y ~ '07 Honda CBR600RR-7 ~ Bikeless
'53 Ford Ka 1.3 ~ '03 Vauxhall Astra SRi 1.8 ~ '52 Vauxhall Astra SRi 2.2 ~ '53 Vauxhall Astra GSi

[Noxious89123]

Your not running it with the choke on are you? I know some people buy a bike and don't realise which way is on and which way is off for the choke lever / plunger...

Does it do it all the time or just sometimes? At high rpm, low rpm or both?
____________________
'06 Honda CBR125RW-6 ~ '00 Honda CBR600F-Y ~ '07 Honda CBR600RR-7 ~ Bikeless
'53 Ford Ka 1.3 ~ '03 Vauxhall Astra SRi 1.8 ~ '52 Vauxhall Astra SRi 2.2 ~ '53 Vauxhall Astra GSi

[hadden]

lmao i didn't ride my rs for about 2 weeks a few months back because i was waiting for a new clutch cable.anyways it came and it ran just like what this bloke is describing and it took me best part of 2 days to realise i had left the choke on and the symbols had rubbed off before i owned it.it sounds stupid but easily done.
____________________
red bull gives you wing sting!!!
current:aprilia rs 125
previous:honda c90,honda cm 125,yamaha xt 550,2004 suzuki drz 400.(all used for off road back in the day)and a piagio zip 50cc..oooossssshhhh

[Robby]

It's fair to say that this forum won't be able to advise on the fuelling side any better than the place you have been to. If it has been set up on a dyno then it should be ok on the fuelling.

Which makes electrics look more of a likelihood.

If it runs well sometimes, and poorly at other times, then the joy of an intermittent electrical fault is a possibility. In no particular order, possibilities are:

1. Corroded earth points.
2. Knackered plugs
3. Knackered HT leads
4. Knackered battery or regulator/rectifier

Diagnosing intermittent poor running is very tricky from afar. Even more difficult on a bike with a highly modified fuel or exhaust system that has been played with by someone else, some of which might not know what they are doing.

[SPIKEYMIKEY]

It has a full akroprovic system on it ,brand new chain and sprokets,brand new metzler reinsports,wheels just been painted white,all body work been painted in new kawaski green,hugger under tray,led clear rear light,new arrow indicators,forkseal s just been done,double bubble screen so guys what do you think i would get back if i break this bike any ideas ,sorry for the spelling mistakes.

[hmmmnz]

when was the last time you did the valve clearances,
its my go to answer, but i had similar issues with my zxr750, i was chasing my tail for ages before i bit the bullet,
turned out a few of the valves were so tight i couldnt actually get a feeler guage in there,
once i sorted it, bike ran like a dream,
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the humans are dead
I kick arse for the lord
Wiring Diagrams BIDNIP it bitches

[ZRX61]