mk1 1200 carbs running dual filters set up

[B2BC]

anyone have any hints/tips info 

mk1 1200 carbs stock motor 

dual k&n filters open-ish pipe

fitted 155 mains lowered c-clip to last notch added extra waser under c-clip to raise needle that bit more air screws 2.5 out

bike fine on tick over wont rev up

i have 150 main jets spare 

any info on what i can do to get it running without out dyno kit and rolling road time

 

[Del]

Yep,bin the filters and re-fit the airbox

[B2BC]

Wish I could use air box b12 engine inside gsx frame so no choice but filters unfortunately 

[fatblokeonbandit]

If the motor is standard b12 then that is way too big on mains..stick the clip in he middle and go 125 - 130 ish as a starting point, or stop all the agro and get it set up on a dyno.

[Del]

Swap over to Ramair socks,they work better than the k&n filters. I could not get my brothers slabby(1052 with bst38ss,started 0n 140 mains,but when dyno'd was down to 130)right on k&n duals,so swapped over to the ramsir socks with silicones bellmouths(or airbox rubbers,got it spot-on.Quite a few(John Oliver,etc) have used them and also got good results



They fit in the tighter spaces on the frames,they don't crunch up llike the k&n filters

[Del]

http://www.Eblag.co.uk/itm/RAMAIR-PERFORMANCE-FOAM-SOCK-AIR-FILTERS-SUZUKI-GSXR-BANDIT-CB-ZRX-XJR-KZ-FJ-GS-/350634792250?hash=item51a376553a:g:d1oAAOSw~bFWGXh2

http://www.Eblag.co.uk/itm/Universal-60mm-76mm-Air-Filter-Induction-Kit-Silicone-Reducer-Connector-/271135577125

[t3rse]

Same configuration on a bandit...150 is too rich...the bike runs well cold on 147.5 but it's still rich at sea level and shit when hot.  135 is too lean (for me)...I'm trying 142.5 ish (in the post).

Edited June 28, 2016 by t3rse

[tabby59]

I'd do either a Factory Pro or Dynojet kit and some quality time on a dyno measuring the AFR, with the K&Ns. Just throwing main jets at it isn't going to be very successful. A good jet kit will help improve the lift rates of the CV slides and supply jet needles to match the lift rates.

[t3rse]

You brits seem to have dynos around like we have auto parts stores.  Dyno time in the US is pricy and finding a shop that knows how to deal with carbs is difficult or impossible depending on where you live.

[Del]

I personally wouldn't waste money on jet kits,I have found they cause more problems than they solve,that is imo and I am sticking to it
I have got pretty good results from getting a rough idea of sizes from people on sites like this,doing a plug chop and then just a couple of runs on a dyno just to make sure it is bob on.
You will get better results from the ramair duals i put above.Speak to Yoshijonny,he'll tell you the same

 

Edited June 30, 2016 by Del

[Rsk_141]

On 21/06/2016 at 0:32 AM, Del said:

http://www.Eblag.co.uk/itm/RAMAIR-PERFORMANCE-FOAM-SOCK-AIR-FILTERS-SUZUKI-GSXR-BANDIT-CB-ZRX-XJR-KZ-FJ-GS-/350634792250?hash=item51a376553a:g:d1oAAOSw~bFWGXh2

http://www.Eblag.co.uk/itm/Universal-60mm-76mm-Air-Filter-Induction-Kit-Silicone-Reducer-Connector-/271135577125

Got 34mm carbs which are only 52mm intake, so the reducer will be too big, would silicone tube do the job? Seen it in meter lengths that I could cut to length, if so what length, I know bell mouths come in 30mm and 50mm, OEM intake rubber length might be a good idea as well if anyone has the size.

[Del]

When my brother had the bst34's fitted,I used Bandit 600 airbox rubbers with the ramair filters 

 

Edited June 30, 2016 by Del

[boilerdude]

Did you pull the 2 float vent hoses? Do that put the 155s back in there. Report back

[sstacky159]

my bandit runs great with twin filters and racefit open pipe.gsxr1100 cams and 750 dot head though dynoed at 132 brake..