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PostPosted: Fri Feb 03, 2017 8:48 pm 
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Ninja Guru
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It's fine-tuning the slide-spring


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PostPosted: Wed Jul 19, 2017 9:53 am 
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Mechanic
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Location: Northumberland E1
Steve-TC1 wrote:
899 wrote:
Just checeked my C carbs, there dynojet needles on the lowest setting but someone has put 2 washers on top of the clip - cant see why - anyone got an idea? Screws are all set 2 & 1/4 turns out.


I've seen this a few times before and it makes absolutely no sense in my mind , it does nothing so why do it ,

all I can think off is those that do it are miss reading the how to on how to shim needles ..



Nice safe place to keep your spare washers!

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PostPosted: Wed Jul 19, 2017 10:41 am 
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WSB Rider
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Location: BRISTOL zx9r B2
Putting a shim on top of the needle would help reduce needle flutter with the OEM needle,having a adjustable needle with grooves/circlip adding washers above the circlip would allow the spring guide to sit on the needle again giving the needle stability.....the circlip is thinner than the OEM needle head

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PostPosted: Sat Oct 28, 2017 2:07 pm 
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Privateer
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Location: hull c2
new to this forum and new to owning a 9 so apologies if I'm misinformed


the needles in my zx6r had notches but the gaps were too big between them and lowering the clip a notch made it run too rich
so I fitted a shim washer .5mm thickness and it seemed ok
I wasn't that bothered because the bike is/was rarely used below 10k and wot, moving the inner main jets to the outer carbs and fitting bigger to the inners combined with a full akra exhaust, however, made an incredible difference


the 900 is a different animal and I would die if I tried to thrash it the same as the 6 cos I'm not that good :o

so as to washers, I cant seem to find any 3mm I.D and 6mm O.D most of them are 7mm and thickness I can only find 0.5mm

did I read yorkie (hello fellow tyke btw ish) wonder if 0.8mm thickness might be better?
if so I can find nylon washers 3mm 6mm and 0.8mm thickness and a quick google suggests nylon is petrol resistant so would they do?

has anyone else used thicker washers than 0.5?
and finally if its to be 0.5mm thickness is 7mm OD ? in fact whats the biggest OD before it messes things up cos I'm sure Ive seen m3 at 0.8 thick and 9mm OD

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ZX9R C2 1999
ZX6R J1 2000
GTR1400 2010

YAMAHA RD350A 1974
PUCH M50 SPORTS 1973


Last edited by aljaxon on Sat Oct 28, 2017 3:45 pm, edited 1 time in total.

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PostPosted: Sat Oct 28, 2017 3:32 pm 
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Privateer
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Location: hull c2
plus re spark plus from my two stroke fettling days I understood to check mixture you looked at the colour of the ring right inside the plug near the base of the porcelain.

I even did roadside plug chops on my zx6r =D> as I couldn't shake the two stroke tuning mantra

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ZX9R C2 1999
ZX6R J1 2000
GTR1400 2010

YAMAHA RD350A 1974
PUCH M50 SPORTS 1973


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PostPosted: Sat Oct 28, 2017 7:21 pm 
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Ninjaneer
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Location: Altofts Yorks. Blue 9C2 9F2 & 12B4
7mm wide might be just to big you would have to try.
zx-9r E1 used different thicknesses, and settled for 0.8mm, I couldn't find any that thick only 0.5mm so used them instead, and they worked fine for me.

I have a few spare washers here.

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Just got yourself a ZX-9R, then do your bike, and yourself a favour, read this thread. viewtopic.php?f=21&t=28097

Please will forum members put their bike model letter, & 1 or 2 after their Profile Location. eg: Your Town & B1,2,3,4 C1,2 E1,2 F1,2
As all zx9's are all slightly different, and I get fed up having to ask which model & number, as year may not be accurate.


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PostPosted: Sun Oct 29, 2017 11:32 am 
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Privateer
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Location: hull c2
can I buy 2 off you please yorkie . . .

that's as long as you do buy one get one free?

edit
just seen where you live, me and the missus passed nearby on wed night
if we'd have come to yours we would have missed the m62 shutdown and subsequent 45min detour

the vacuum adapter bolts don't arrive at fiveways in hull till tues so theres no panic

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ZX9R C2 1999
ZX6R J1 2000
GTR1400 2010

YAMAHA RD350A 1974
PUCH M50 SPORTS 1973


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PostPosted: Wed Nov 01, 2017 6:49 am 
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Ninja Guru
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Location: Blackfoot, ID: ZX-9R sE1* & F1, both California EVAP models. * Supercruise capable
Just a little bit of info to address how high I've gone with them. Where I live (1,333M AMSL) I tried 1.3 and 1.6mm with various washer combinations and yes the ones in both 9Rs are termed fiber washers. 1.6mm is slightly too rich for altitude riding, even at WOT with smaller mains, but 1.3 is okay under the same conditions; with a freer flowing exhaust.

For sea-level riding, I could easily see power junkies experimenting with 1.6 - 2.0mm, which should be fine. My JNs are all at +0.8mm because that gives a good mid-range hit without sacrificing much on fuel and it makes for easier warm starting than the higher jn settings. 1.3 hit like a hammer, even at altitude, but then it took away my bikes' range advantage over other bikes. So experiment on your own and see where you like them.

:smt023 on your spark plug color reading method.

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PostPosted: Wed Nov 01, 2017 5:57 pm 
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Privateer
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Location: hull c2
hey hows this
I even used to add a couple of teaspoons full of cazzy R to thezx6r tank to boost the deposits on the plug cos without, the plugs just looked grey/white
on my rd350, didn't have to look at the plugs, I knew I had it right as the stingers would go choccy brown

I once saw the end of my akra pipe on the zx6r a faint hint of light brown but most of the time it was dark grey

plus people following me said it smelt ace
all it takes is an eggcup full per tank
helps with upper cylinder lubrication as well
too much though and you get that wooly furry low to mid range feeling as you open up after a short dawdle in a 30 etc

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ZX9R C2 1999
ZX6R J1 2000
GTR1400 2010

YAMAHA RD350A 1974
PUCH M50 SPORTS 1973


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