broken fcr41 carby plate

happened a few months ago now,but could have been sooo much worse.
the old faithful started backfiring for no apparent reason & this be the cause.
be weary this will start to happen to every old berg its just a matter of time, or any brand that has an keihin fcr41 carb on(which is most).
..weed..

expensive lil buggers too.
$170.00 aus
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the last couple of pages in my gallery has a break down of fcr mk1 & mk2 part No's,if you need them.
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hey guess what people,i've broken it again! :angry:
i replaced that o'ring & plate last time and it done it again?
how many other people are running the fcr41 mk1(without hot start).
i can see no reason why it has broken again,the slide itself looks in good nik.there is no binding when going from wide open to fully closed.
this time the motor digested it.i haven't pulled the valves out yet to check them ,but they appear to be seating alright,looking at it with the head off.
quite a few little scratch marks in the top of the piston, & the bore has seem to come out unscathed.
strang one.... it just reved up when i was at idle,then ran like $hit, then stalled.kicked it through with the kick start & it locked up.phucking jap $hit on a euro trash,must mix like aluminium & brass. :mrgreen:
i'm starting to think i should chase up a fcr41 mk2.according to the local bike shop there is very little problems with the mk2,they have never replaced a mk2 slide plate.
the slide & slide plate are different in the mk2 & i am starting to think that is why we have a mk2.
beware to people who are running a mk1 fcr on any brand of bike.
i've heard of a xr honda that digested one,so maybe on the mid to late 90's to early 2000, various brands of bikes ran the mk1.
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come to think of it now taffy, i think it was rattling more than usual,but i wouldn't say it was excessivly loud by any means.
i can always seem to hear it more on my bike more than most(at low revs),even when its brand new.
i think this one case where 650 running at lower revs than 400/450's ,it has that pulsating induction which has a detrimental effect on this plate rattling more than usual.
i bet running this same carby on a smaller capacity bike probably wouldn't have a problem.
funny, i started to run an oil thickner in it the last couple of rides, cause it is starting to burn a bit of oil & when it was up to operating temp it started to idle a bit fast, :idea: mmm... i just thought it must be creating less friction,so i just screwed the idle back a bit and it was all ***** dorry again.
thinking back now , :idea: i bet a crack in the plate started to form & was letting more air through at idle.
the warning signs were there, but it just didn't click :cuss:
what about glueing the new plate to the slide,that will stop the ba$tard from rattling :?: but what with any ideas :?:
thats my only option,appart from doing this ever 1 & 1/2 years or buying a fcr41 mk2 for it?
any briliant ideas anyone?
cheers ..weed..

yeah thanks for the ideas bushy.
i think you are right ,there must be some wear in the carby.
it appears that if i devcon the plate to the slide,i might get a bit of popping on deceleration.
still, it might be worth a try & cheaper than a new carby.
see what happens

ahh right.
mine hasn't got one of those,that must be a mk2 thing?
well for the life of me,i can't understand what that hole does in the slide plate. :?:
it doesn't go anywhere,so its not going to effect mixture.
the only thing it can do is ,the more vacume that is created on the motor side of the carby ,the harder it squashes the plate against the o-ring & slide.
i measured up the slide rollers,they all were 18.9mm except 1 being 18.5mm :shock: ,so i now have ordered a roller,that will certainly take a bit more slop out of the slide assy.
geezzz ...no wonder some blokes only keep there bikes for a few years then trade in.
everything wears...everything...., bit by bit until it starts to cause problems.
then its up to poor stingy ba$tards like me to figure out whats going wrong. :roll:
new slide plate is now devcon'ed to the slide.don't know if i done the right thing there, but the deed is done,& i will see what happens. :|
here is a pic of that worn roller,certainly one to keep in mind if you have bike thats done a few k's.
..weed..