hi all,

so i have a gsxr600 bike carb set up for my polo coupe and some people say they are worth fitting and then you have others who say they are not reliable and take fine tuning to run right.

my car currently runs smooth and has never let me down, engine is quite solid for a 1.3 spi.

i know nothing about bike carbs, do not know how to fit or tune them so will need someone who is an expert to install them - if i decide to get them done!

few people have mentioned that they do need fine tuning and that in the winter they give trouble and fail to start.

so i am thinking do i fit them or sell them and use the money to just port and polish the head.

just want honest opinions from people who have these fitted as to whether or not i should get them fitted and will they give me problems later?

what maintenance precauctions do i need to take when i have them fitted?

many thanks.

Kool. putting carbs on mine was the best thing i've ever done to my car.

but i did it the best i could. i purchased a new set of carbs from ebay. so i wouldn't worry about if anything is wrong with it,

i then installed megajolt for the ignition timing so someone like bogg brothers could tune it on the dyno properly so i guess you can say i did it the proper way but the more expensive way.

i always have problems with my car but not with the carbs or ignition. and about winter driving. you just need a choke cable into inside of car. that would be the last thing to worry about.

of course they need fine tuning , your taking carbs from a high revving smaller cc motorbike and fitting them to a car

if you get them done properly then it should be reliable ...after all you dont see motorbikes stuck on the road sides with carb trouble do you?

You're pissing in the wind porting and polishing a standard 1.3 SPI. There's so little gain to make you'd be better of just binning the seats!

I had trouble setting my bike carbs up and they are still over fuelling (on purpose) but that turned out to be the fuelling method I chose. I eventually went with a fuel pump from a motorbike.

If you're not handy with the spanners then it's not something I'd recommend doing but there really is no reason why you can't educate yourself on the subject. Most people on here have.

lol kiss of death. car would not start this morning. and i mean not start! not even a hint of it trying to.

1 yr old carbs.

1) choke pulled full

2) starter motor allright

3) battery fine but is going down now - is about 11.8v now. at this rate will be drained soon.

4) fuel level in car is just in the red.

I don't get whats wrong. I even moved the idle screw in and out but I believe this does not effect starting?

any help guys - had to get an expensive taxi to work today.

pull a plug after cranking and see if its wet

hold the plug against tthe head and crank the car , see if it sparks or no

Thanks for that. I am at work now ,will ask boss if I can go back now.

why would it be wet? wet from fuel?

condensation over night?

Edited 27 August, 201511 yr by damunk

wet from petrol- if its dry thats why it didnt start

could also pull a fuel hose and see if it pumps when cranking

Edited 27 August, 201511 yr by steveo3002

Yeah the fuel pump works you can hear it. it's on a t-type return line. I might get some more fuel n top it up abit.

Also my lack of experience in this led me to press pedal up and down and no doubt i've been flooding it.

Funny thing is the last two days I have been driving like a grandad/ really slow and having a good reading (leaner) on the AFR. And noticed it having a funny start last few times.

Edited 27 August, 201511 yr by damunk

Got home and tried again. Nothing dead. The reason I was driving like a grandad last two days was because I went under a railway bridge and it was flooded. I could'nt turn back because everyone was pushed up against one and other so all the cars went through 2-3 feet of water. so drove slow last few days to make sure everything dries up proper.

Anyway just now I just wiggled the cable going into the vr sensor (trigger wheel sensor) and started it up and fired first time without choke or any pedal pressing.

What happened do you think?

Water was in the connections that dried up?

The force of water going through it pulled the connections out?

I drove much faster (about 5-10mph) than anyone through the water as was scared of cracking the manifold lol ha ha

So to the OP - I dont think it is the carbs fault :P

Edited 27 August, 201511 yr by damunk

yeah damp or iffy connector

bad move going through the water ..all too easy to F the engine

Bike carbs are so simple to set up! Most people who attempt it have a lack of knowledge and cry when their car doesn't work properly.

Very good power increases to be had when set up properly, you WILL need a wideband (air/fuel ratio gauge) in the car to set it up and monitor it, don't bother taking it to a rolling road to set it up, youll be wasting your money and they normally only set up for what. You'll still see a good MPG figure if you drive normally (35-40) too. Once they're set up, they're set up pretty much. Never really had to touch mine since fitting them.

Have a good read of the bike carb FAQ on here if your stuck on anything. I'd recommend getting a motorbike fuel pump as well, they are idiot proof!

Hope this helps and happy bike carbing

Agree with above comments. AFR good quality one is needed 1 million percent.

Also Boggs tuned my car well but did not spend much time adjusting the carbs.

It was literally 2 minutes - screw in abit on the jets and straight on the rollers.

I am sure theres more to gain (5 more bhp) but i lack the knowledge to do it at home and what to look out for.

The map on the megajolt is good but I'm stuck for now.