Help please need my bike for work

Hi my so I'm looking for some advice to help me get my bike working properly again I have just put a new sport exhaust on it as old exhaust rusted and got a hole the person who sold me the exhaust also sold me a open air filter and a box of jets my carbs jet size at standard was 83 so with the new exhaust and air filter I upjetted to a 92 main jet bike ran like crap so went down to a 90 the bike was running good for a day then wouldn't start the next I have now put a 104 main jet in starts every time but won't pull away and sounds like crap i don't no what to do so any advice on what main jet to run and how to set the air/fuel mix up plz thanks I've added pictures of exhaust and filter I have in the bike

 

put your old filter on , try a 93-96 jet

ok so the two screws on the side of the carb these are for idle, one is the idle screw, the other will be a idle mixture screw.
1/4 throttle to 3/4 throttle this is your slide needle , its sits inside the carbs slide and allows you to richen the mixture or lean the mixture between 1/4 throttle and 3/4 throttle.
for wide open throttle this is where the main jet comes into play.

now you say a 104 gives you a nice smooth idle but it wont pull and it sounds kinda rough / spluttery. this would be because your running a little to much on the rich side. as a rule of thumb we would upjet by 10-15% , your 104 jet is nearly 20% extra so it needs to come down a little. i would say your going to be between 93 - 98 for the main jet.

now heres the fiddley part, install a 98 jet and try the scooter, if your finding its a bitt raggy on the throttle , remove the 98 and try a 97 or 96 jet again try the scooter see how that smaller jet feels, there will be a point where your happy with the throttle and thats your ideal jet.

next you will do a plug chop, ride the bike hard at max throttle for a couple mins then while at max throttle turn off the ignition coast to a stop and remove the plug, your looking for a certain colour on the outer ring of the sparkplug.

chocolate brown ring colour bike is running in the sweet area
black ring colour the bike is a little to rich ( drop down one jet size)
white'ish ring colour bike is running to lean ( go up one or two sizes in jet )

your aim is for that chocolate brown colour on the spark plug.

As for open air filters, NOT ideal in todays weather theres a lotta water about and gunk that clogs them up very quick and they are a right royal pain to get jetted correct. if you have the stock airbox put this back on and thry the jets above i mentions (93 - 98) see how that preforms

 

Thank for your reply and all the information you have provided will get out there first thing tmoz and the only air filter I have is a open one as last one got smashed and can't seem to find a stock one for it if I going to use it with the open filter will I need a bigger jet ore should I go for a 98 and work my way up ore down a few depending on spark plug

 

yep buddy if you dont have a stock airbox fit the open air and jet till it feels right, start with that 104 and come down a couple sizes each time theres gonna be a point you start noticing the difference in throttle and response, always best to start high and work down in jet size .

 

Ok cheers mate will let you no how I get on tmoz hopefully will all be good ore going to have to book another day off work

 

aye keep us upto date buddy a lotta heads is better than just one scratching and wondering , but yeah sounds like its a little to rich for your filter so drop down a couple from that 104 till you find that sweet area

 

Just Incase you was wondering this is the exhaust and the filter he told me to use with it then sold me a 90-108 size jets

 

he was right on the pipe and jets, but a little off on the airfilter but it should work , just go for that main jet swapping buddy , again start nice and high and drop down either one or two jet sizes each time you may bounce between two jets as one give better preformance but has a little throttle lag and the other has not so good preformance but the thottle lag ceases

 

Even with fuel injection its honestly not worth it, You still need to stop water getting into the fuel mix. The only time a open air filter is worth it is a decent one on a properly tuned 172/183 set up that isnt daily ridden.

OP it may be worth trying to google what other bikes use the same engine, Find one thats the same engine and get a airbox for that one?

 

Ok will have a look for another air box think it's the same as a speedfighter 2 ore trekker

 

Get an airbox on there, you will just have problems if not.
What bike is it?

 

It's a Peugeot metal x 100cc 2003

 

Yeah same as a speedfight

 

Thought it was buy looking at pictures is the engine in it a speedfighter engine then basically because looking for parts and they all seem like the right ones

 

Yeah, speedfight, vivacity and a load more

 

Cheers mate what's the best things to upgrade after exhaust then variator and clutch springs rollers is that about all you can do

 

other things would be something like a 125cc bigbore , but that pipe and re-jet should open the legs a bit on the 100cc motor.

clutch springs , variator , contrast spring and weights, the variator may give a little more top end speed allowing belt a little higher travel. the contra spring , clutch springs and the rollers are more to do with how the bike picks up its power and its take off from the line .

never seen a metal-x gotta say i really do like that

 

Changing the vario will give you the most noticable difference

 

Cheers and I love this ped never seen another one for sale ore in my are only ever seen 2 and I own both of them untill someone cut across in front of me and I smash through there window was pissed but lucky I had the other one at home for spares so manged to make a Woking bike out the 2 again