petrol in the crank case breather

[steve87]

like an rc2 maybe, get the letters in. it was nice, but didn't do that great on the track, but i think the rider was too low in the revs. in my opinion.... thats worth nothing... yes wooo.
the zx10's did well! lol

[zimm]

zx10's are QUICK had a good 6 lap battle with one at pembrey .. took him 4 laps to get past, and he didnt get too far ahead in the last 2.. scary moment of the day (apart from jumping the curb at 90 and going MX'ing) was catching a GSXR1000 through a multi apex left hander, then realising he was sideways and laying rubber down ! i backed off in case he lost it .. impressive though.

[steve87]

good skills, i have got anohter question for you, cause youknow your stuff.
my zxr still struggles to tick over, at anything below 2500 revs,
i believe tht the small needel works below 3000 so this would be working at this point. I have cleaned my carbs with some spray carb cleaner, ad i thought it had done it, but it hadn't.
if itssay ticking over at 1800, its happy when cold, but when warm, it wil go up and down then cut out.
does this sound like its still a dirty needel, even though its fine when cold.
If you can fire at me all possibilities, i will say what i have tried.
steve

[zimm]

plugs
ht leads
float heights (possible as you've had the floats out)
mixture screws
air-leak
air filter
valve clearances


not necessarily in that order .. should tick over quite happy at ~1000rpm if all's well.

wouldnt really have thought it'd be the needle, unless its bent .. needle jets are pressed into the carb body and can wear to an oval over time though.. that makes them impossible to setup correctly, only fix is new carbs.

just try to get everything spot on to the book.

[rover220]

yep, when warm mine will tick over at 1100rpm no problems.

[steve87]

new plugs,
new ht
new coils
I have replaced the o-rings on the metal sleeve thing that the needle goes inside.
Admittedly I checked them before i did this and set them to 11mm or whatever the manual says (jason off 400gb helps me do all this), so i will check them again.
mixture screws are at 2.25 turns out, all as the manual says.
i have checked the rubber tubes between the carbs and the engine, a these are all good. doesed them in wd as the engine ran, and it didn't go up or down.
i have cleaned the air filter with a air pressure line, so is pretty clean.
do need to check valve clearances though, ae they hard to do on this bike?
big JT has done them on his vfr400.
do you think it could be te floats... to describe. when i set them, the metal rim was flush to the carb, now it is slightly raised, which i think would mean they would be low fuelling. would that be right.
also where do you live?

[zimm]

weird ..

could be valve clearances.. but it'd be an extreme case .. has it always done this or just since the carb rebuild ? they are easy enough to do, easier than an NC30 .. tappets just slide out of the way .. minimal disassembly required.. gotta be careful you dont drop a shim in the engine though.

also where do you live?

haha .. im in south wales chap ..

[steve87]

Fair enough.
no it has had this problem for quite a while, to be honest, i will get jas to do the valve learances with me. i mean its much much better than it was, and it has come a long way, so i will re check the floats and clean the needles again, just to make sure. would that also lead to the petrol in the crank case, the valves?

[steve87]

well, i think its down to carb set up.
1 was slightly rich
2 slightly rich
3 prety rich
4 very week
i have adjusted them so they are about 90% there, need to fine tune
next question, has anyone got any spare main jets and what size, mines get 95 in, and i want 100 really
steve

[zimm]

should be #98's in an H model zxr ..

#95's are right for an L

i'll have a dig through what i've got tomorrow.. may have anything between #95 and #102 ..

[steve87]

cool.i think my bike may have early l carbs on it, cause of that, and they have the heating plumbing. I guess by sticking the 98's in, it will sort it out back for the h1?
i have an after market can and if anyone knows where you can get a k&n/Pipercross r whatever for it, i would be glad to know.
if you do have any, ill have them off you dude.
i think we are getting there..... slowly
steve

[zimm]

aftermarket filters arent worth the money on an H mate ..

I've got a pipercross in mine just because i got it cheap (lad bought it by mistake, sold it on) makes no difference at all, only benefit is that you can clean it ..

get a new OE one and run it dry.

if your carbs have heater plumbing they are almost def off an L ..

think the needle jet holders (emulsion tubes) differ too, and needles might as well.

i'll see what i've got mate ..

know i had some 95's, 98's 100's 102's and some smaller dynojet ones too ..

[steve87]

any luck yet mate?

[zimm]

sorry mate, completely forgot ..

i'll get back to you tomorrow..

promise !

[steve87]

cheers me dears