alister667
|
| posted on 26/12/03 at 11:09 AM |
|
|
Does a Fireblade NEED a good revving?
Well I got my MK Indy Blade going just before Christmas and drove her gingerly out of the garage. It's been great fun driving her around the
yard 'burning in' the handbrake ;-) One thing I have noticed about the engine, however, is that if I drive her nice and gently around the
yard and switch her off, next time I start her she is very spluttery, however if I give her a good rev up (a couple of quick bursts up to 8-9000 rpm)
next time I go to start her she is much better behaved, ticking over a lot easier. Has anyone else noticed this? Does a '99 Fireblade engine
NEED some abuse? Is it a build up of soot on the plugs? Do I need to have the carbs looked at or anything?
Happy Christmas everyone, and a BIG thanks to everyone from the locost forum who helped me get this far.
Cheers
|
|
|
|
|
Jasper
|
| posted on 26/12/03 at 01:57 PM |
|
|
No idea - sorry, but mine always gets a thrashing everytime she's taken out - that's how she likes it!
Nice looking car though - well done...
|
|
|
tony9876
|
| posted on 26/12/03 at 03:00 PM |
|
|
I dont know about cars mate but i have owned almost every type of bike including a blade and loads of tem i have owned have run a bit crap until i
have given them a good few blips of the throttle.
|
|
|
alister667
|
| posted on 26/12/03 at 03:24 PM |
|
|
Thanks Jasper, I'm over the moon!
|
|
|
suparuss
|
| posted on 26/12/03 at 05:43 PM |
|
|
i think it might be something to do with the type of oil, since they essentially pretty high performance engines if you dont give them a bit of abuse
oil builds up on the plugs. that was the case on me 2 stroke anyway, i had an rs 125 racing rep and had to thrash the nutsack off it continuously to
keep the plugs clean, otherwise it keep cutting out at when i stopped at lights etc.
Russ.
|
|
|
Simon
|
| posted on 26/12/03 at 09:27 PM |
|
|
May be plugs. Get some hotter/colder as required - I can never remember which wya you want to go.
ATB
Simon
|
|
|
Peteff
|
| posted on 26/12/03 at 10:28 PM |
|
|
Engine abuse.
It will need to warm up before it will run smoothly. The 125 priller analogy is a bit off cos it's a 2 stroke and the oil is mixed with the fuel
so it would have benefitted from some hotter plugs but the Fireblade might not be so forgiving. How long are you talking about between startups? It
may just be using that bit more fuel out of the float before you shut down when you blip the throttle so it's not so rich next time you fire up.
Have you used the original airbox or different filters? Maybe that is affecting the mixture.
yours, Pete.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
|
|
|
alister667
|
| posted on 27/12/03 at 09:51 PM |
|
|
Pete, it's the original filters/airbox as standard. It's not heat related, I can let her splutter along till she's warm,
she'll still splutter, but after a blip she'll run fine when restarted the next day from cold. I was talking to a biker mate, and he said
a high performane engine like that is prone to choking up and a good blip clears her out. Don't think it's the plugs, they were changed
about a month ago. I should point out this isn't a big problem, justa rev or two and it's gone! Shouldn't affect me once I get
her out of the yard!
|
|
|
Peteff
|
| posted on 28/12/03 at 10:27 AM |
|
|
8 or 9,000 is not a problem for a 4 cylinder bike engine anyway, it's not really a thrashing. Like your mate says it clears the gas a bit
quicker if you blip it a couple of times. Get the carbs sorted and balanced and it'll run sweeter.
yours, Pete.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
|
|
|
Noodle
|
| posted on 28/12/03 at 10:42 AM |
|
|
quote:
Originally posted by alister667
Pete, it's the original filters/airbox as standard. It's not heat related, I can let her splutter along till she's warm,
she'll still splutter, but after a blip she'll run fine when restarted the next day from cold. I was talking to a biker mate, and he said
a high performane engine like that is prone to choking up and a good blip clears her out. Don't think it's the plugs, they were changed
about a month ago. I should point out this isn't a big problem, justa rev or two and it's gone! Shouldn't affect me once I get
her out of the yard!
The powerband on a high performance BEC indicates where the engine is performing at its most efficient. Outside of this range, combustion and
scavenging will be less efficient. Incomplete combustion could lead to plug fouling and a general build up of deposits, hence your mates assertion
that a blip (or a period of time at the more efficient-combustion range) clears it out.
Does that make sense?
Cheers,
Neil.
|
|
|
alister667
|
| posted on 28/12/03 at 05:30 PM |
|
|
Thanks for te help y'all. Can't wait until I get her on the road now.
|
|
|
MikeR
|
| posted on 29/12/03 at 12:05 AM |
|
|
I think everyone has missed the real problem - some gits stole yer bonnet!
|
|
|
alister667
|
| posted on 29/12/03 at 09:45 PM |
|
|
ARRRGGGHHHH. HOW DID I MISS THAT!!!!
|
|
|
alister667
|
| posted on 3/1/04 at 06:22 PM |
|
|
I blocked off a pipe on the engine used to set up the carbs, and the engine runs a lot better, especially when cold. All the details are in
THIS thread.
Thanks for the help y'all.
|
|
|
Peteff
|
| posted on 3/1/04 at 09:33 PM |
|
|
Was it the ones used for the vacuum gauge to balance the carbs?. You would be running weak if it was.
yours, Pete.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
|
|
|
suparuss
|
| posted on 3/1/04 at 10:10 PM |
|
|
there is only one pipe so it looks like its for one of those vacuum acvtivated fuel switches. if it were to set up the carbs, wouldnt there be 4 of
em?
Russ.
|
|
|
alister667
|
| posted on 4/1/04 at 02:15 PM |
|
|
If you look at the picture in the other thread, and look to the extreme right of the pic (around halfway up) you'll see another nipple that was
already blocked off - perhaps that is the same pipe for the other side? Can these carbs be balanced in pairs? I honestly don't have a clue,
but that was the best explaination I have heard, and now she runs very well. Voila!
|
|
|
OX
|
| posted on 5/1/04 at 01:43 AM |
|
|
the carbs are normaly balanced all together and then fine tuned with the mixture screws,if your engine sounds abit lumpy at tick over then you could
have them balanced but it doesnt do alot apart from making it sound smoother,adjusting the mixture screws can make a bit of difference to the bottom
end power.
|
|
|
alister667
|
| posted on 5/1/04 at 06:30 PM |
|
|
The definative answer is:-
" its a vacuum pipe used for controlling the fuel cut off on the bike (when the engine is off, no vacuum = no fuel allowed through). You dont
usually get the little vacuum valve it attaches to though, so if its just left open it bleeds air into that cylinder and makes it run a bit rough and
lean on that cylinder."
Thanks to Chris Gamilin for solving that mystery! Apparently I did the right thing in blocking it off.
|
|
|
suparuss
|
| posted on 5/1/04 at 08:00 PM |
|
|
quote:
Originally posted by alister667
" its a vacuum pipe used for controlling the fuel cut off on the bike (when the engine is off, no vacuum = no fuel allowed through). .
thats what i said, vacuum activated fuel switch! except in different words to how you said 
Russ.
|
|
|
alister667
|
| posted on 5/1/04 at 10:01 PM |
|
|
Yep, you were spot on. Apologies from me!
|
|
|
