GK73A SP2 - Air Filter Solution (big pic thread)

gsxr400 racer · Post by **gsxr400 racer** » Fri Feb 13, 2009 11:20 pm

clockwise turns the idle up

400_Rider · Post by **400_Rider** » Fri Feb 13, 2009 11:31 pm

Well I wasnt sure fuel was gettin through either last time I was cranking engine so I aint sure if that contributed to the black 2 end plugs.

Also am havin difficulty getting the idle screws to seat, plug 4 one seams to screw in further than the rest, I will have to have a better look at it, I think the threads are fooked because when number 1 feels like its seated, if I twist a bit more it'll keep going so I am kinda at a loss as to how to set these now.

I got coils from s GSF 650 Bandit 07 model ones :D choke is working fine.

I had two choices of main jets in me kit, a 122.5 and a 117.5 so I went with the lowest one, 117.5

Any idea what am doing wrong lol could these idle screws be messing it up not starting ?

gsxr400 racer · Post by **gsxr400 racer** » Sat Feb 14, 2009 12:20 am

these you have to screw real lightly as they will bore out the hole if you go to far

gsxr400 racer · Post by **gsxr400 racer** » Sat Feb 14, 2009 12:24 am

a FYI for all whenever you rebuild these carbs you should always set them on a bench for 5 minutes at the angle that they would site on the bike and hook some fuel to them with a bottle and let them fill up if they do not dump fuel on your bench in five minutes your safe for the most part...I usually tilt them then to the angle that they would site on the kick stand just to make sure all is good cause i hate to put them in just to take them back out.

400_Rider · Post by **400_Rider** » Sat Feb 14, 2009 9:24 am

gsxr400 racer wrote:these you have to screw real lightly as they will bore out the hole if you go to far

Oh no, me last set I screwed em in as hard as I could, sounds like am gonna need a new set of carbs then

gsxr400 racer · Post by **gsxr400 racer** » Sat Feb 14, 2009 3:48 pm

you could probably tune these with a color tune or a gas analyzer i think the stock pipes have screws on each header to accomplish this.

400_Rider · Post by **400_Rider** » Sat Feb 14, 2009 4:19 pm

I have the color tune to check combustion but I need it running first lol.

New set of plugs went in the 400, new emulsion tubes, new o-rings all through, new jet kit, idle screws set to 2.75 turns out, float heights set to 15mm as per factory pro instructions.

The plugs are sparking and am sure the fuel is getting through, I have spent a couple of hrs trying to bump it, and no joy whatsoever.

I don't know what else I can do, why wont it fire ? could it be getting too much fuel ? but then wouldnt it backfire ?

Does anyone know what I should try next ? what would you guys do in this situation ? I've just about give up as I have exhausted all options that I am aware of

Cheers.

Matt.

gsxr400 racer · Post by **gsxr400 racer** » Sat Feb 14, 2009 4:35 pm

maybe need to adjust the valves... did you put new plugs in or the them black ugly ones back in they are fouled...fouled means they spark out of the bike but when put under the load of compression it wont start... or maybe your plugs wires are hooked up wrong...

400_Rider · Post by **400_Rider** » Sat Feb 14, 2009 4:54 pm

Well it used to run ok, yes I put new plugs in, I did upgrade the coils, the coil wires say 1 2 3 4 on em and I have them gonig 1234 from left to right, do you know for example if say left hand coil does plug 1 and 3 then I can check see what mine is ?

Thanks :)

gsxr400 racer · Post by **gsxr400 racer** » Sat Feb 14, 2009 5:01 pm

coil one has two wires one of which goes to #1 on left of motor second wire from that coil goes to #4 extreme righ of motor the the next coils two wires go t cylinders 2 & 3...Is that how its hooked up?

GK73A SP2 - Air Filter Solution (big pic thread)

Re: GK73A SP2 - Air Filter Solution (big pic thread)

Re: GK73A SP2 - Air Filter Solution (big pic thread)

Re: GK73A SP2 - Air Filter Solution (big pic thread)

Re: GK73A SP2 - Air Filter Solution (big pic thread)

Re: GK73A SP2 - Air Filter Solution (big pic thread)

Re: GK73A SP2 - Air Filter Solution (big pic thread)

Re: GK73A SP2 - Air Filter Solution (big pic thread)

Re: GK73A SP2 - Air Filter Solution (big pic thread)

Re: GK73A SP2 - Air Filter Solution (big pic thread)

Re: GK73A SP2 - Air Filter Solution (big pic thread)