Carbs out..Fuel Injection IN

[flying_zzr250]

Carbs are such a hassel.
Can fuel injection be put in old bike 92???
How much it might be?

[John]

erm what bike - takes alot of work and know how.

[flying_zzr250]

hmm.... how much work and how much know how?
but its possible aye....

[TwoSeven]

You can get kits for many bikes (such as the cibby600) but it really doesnt make much of a difference because part of what makes the FI good is the design of the engine and the use of a digital ignition sysem (more detailed fuel map) and all the sensors that go with it. For a 92 era engine you'll get better performance from using a high end carb.

[bugjuice]

carbs can run on any 'nuts n bolts' engine and work fine once they're set up right.. Injectors need a ECU to run, which means installing a computer so that it can inject the fuel according to the air flow, air and bike temp, timing/ignition etc and to do that, sensors need to be installed around the engine and exhaust too. It can be done, but the question is more 'is it worth it' and for a 250, the answer is often; nop... sorry..

If it's something special, and there's a good cause for doing it, then it's a fair bit of work, time and money that'll go into it. A few days on a dyno and playing around etc, a few weeks to run it in, then you should be sorted..

[flying_zzr250]

hmmm...
the carbs in my zzr250 are making me crazy.
my bike dies in low revs.. when its standin in stop sign it just dies and take time to start.
garage say that its the carb. got it cleaned and it back to square 1 after 1 week.
so any ideas?
what a high end carb... how much?

[bugjuice]

not sure on the 'high end' carb, unless twoseven is talking about high end performance ones, in which case, most of those are probably for higher cc'd bikes as there's not a great deal for 250s, cos they're just not as rewarding power-wise as the bigger bikes, so things are aimed more for those.

Have you looked at getting them rejetted and/or reconditioned? Not sure how much it'd cost, but that should fix 'em up. Or see about getting another set of carbs off another bike. Have you had the cylinders checked out and spark plugs too? Also, had the fuel cleaned out? Might have some crap in there that's floating around, then gets stuck in the carbs..

[Jeremy]

hmmm...
the carbs in my zzr250 are making me crazy.
my bike dies in low revs.. when its standin in stop sign it just dies and take time to start.
garage say that its the carb. got it cleaned and it back to square 1 after 1 week.
so any ideas?
what a high end carb... how much?

Just my two cents here, but it sounds like the idle level is just set too low. Check the manual and if it's easy to do then just tweak it up another 0.25k, which (fingers crossed) might sort out your problems.

[flying_zzr250]

The idle is not responding.... and yeah the cylinder and stuff has been checked.
already spend 500 on it but... the problem is still there
damn

[sAsLEX]

some aussy enginnering student i think have FI a CBR250rr with alright success but their site, which i lost seem to show them as rather smart cookies

[lukehyslop]

Some crazy Aussie guys fuel injected a cbr 250. Didn't cost bugger all but they used car bits and pieces and were pretty switched on. Heres the link:
http://members.dodo.net.au/~aepl/cbr.html

[flying_zzr250]

seems pretty ON and long
will take some time to read

[WINJA]

MOST POWERFULL NATURALLY ASPIRATED GSXR1000 EVER BUILT DITCHED THE EFI AND WENT BACK TO CARBS, I WISH MY GSXR1000 HAD CARBS AND NOT EFI

[bugjuice]

interesting read on that link... got me thinkin about sticking a small turbo to my bike..

so it can be done, which i knew could be, but shows how much trouble you have to go to, to get it done..

[flying_zzr250]

well said bugJuice...
wont mind doing something like that..
but probably not for now
just got my zzr back and almost fixed. hard to work on projects without a garage.
Does paint disolve in petrol and cause trouble in carbs?