runner 172 running problem

im having problems with my bike, when i pull away from lights it kinda judders and splutters for a few seconds before it gets moving, and recently its gone like ive put heavier rollers in but i havent cratch: cratch: like 1 day it was running nicely and now its spluttering and i have to hold it on full throttle for it to pick up speed..and it doesnt want to wheelie from aboout 20 and then it gets power again at like 50 and you can lift it again..

the setup is

172
gold billet n skull cap
25mm carb with 100 jet, needle on the second notch from bottom
stage6 filter
polini reedblock
polini manifold
malossi variator with 3 12.5 malossi rollers and 3 12.2 polini ones (green 1s)
malossi clutch
malossi belt
malossi cdi
lightened flywheel
pm tuning gear up
malossi pipe

ill be haps if someone can help me coz ive tried changine jets and playing with the carb but it just keeps spluttering, although it only does it once it gets warm like after 10 minutes or so..

o yeah and today it was going alright up to 50 then the revs would die down a bit then pick up and then die again :eh: :eh:

riideorcollide

 

can also be the spark plug ?

 

hmm well.. my belt is a bit darmaged theres a tiny chunk out of it on one side. but i didnt think that would make any difference. i was thinking kit yesterday

will try a belt n see how it goes

 

i change my plug like every two days lol, every time i take it out it looks black and oily

even though ive downjetted it, its only gone liek this since i fiited the malossi pipe.

when i had my standard it ran fine, and was a niice choco brown colour, i put in a 104 when i fitted the malossi, but it was way to rich s0 i went back to the 100 and dropped the needle clip by 1.

 

you talking about the screw?

do you know how it should be set roughly?

 

if u wanna come down my way tomoro ill have a look and do ur idle mix if u want

 

is the idle mix the fuel/air mix screw or the screw for idle RPM

 

i been turning it half turns left every few hours today n seems to be getting better..

it only does it when its warm though man its weird, i think it might actually just be my belt

yeh bradley ill come down soon, not tommorow i got college..but soon well go 4 a cruise n ill show you what a hard bike is :mrgreen:

 

lol yh itll have to be late afternoon or eveing times tho coz i go work but yh just ring me when ur guna come down and u can bring me my flywheel too :mrgreen:

 

weeekend ting.. need to get it from hatfield.. its a cruise if youre down

 

yh i need to try get my bike motd tho dont realy wanna ride it coz i havent got nuffin lol if anyfin can just go in my car?

 

yeah still..

anyone know which way makes the idle mix richer n leaner.. been playin with it more today and it seems to be best all the way to the right then half a turn left

 

in is richer out is leiner