strange problem with my zip

Hi all, i got a zip with a italkit 70 kit and doppler s3r exhaust.only recently i have come across this strange problem.on a good day i start up my ped and it rides perfectly in all throttle positions no problems atall and some days i start it up and it just splutters heavily, the thing wont even move it just constant splutter even at full throttle and once u let go of the throttle it starts dying. ive tried a new plug and changed carb settings but no luck. i cant seam to find the problem. i was told it could b an electrical problem so one time i just wiggled sum wires when i knew it wasnt working, started it up and it worked but this could have just been a fluke.everything seams to b in order but it just wont work. its been of the road for over a month now. any ideas would b great.cheers

 

sounds like your choke is acting up, make sure all the wires are connected properly if youve got a spare choke try fit that or a friends

 

can i change my 12mm webber carb into manual choke or jus get a new carb thinkin a bigger 1!

 

you might aswell just get a 17.5 mil carb or 21 or 20.5 but the 17.5mil should go straight onto ure manifold the 12mil webber carb is pretty small for a 70's

 

You need another carb, 17.5 is to be honest slightly too small for a well performing 70. A 12 mil carb is way, way too small.

 

yeah 17.5 is still ok but the 12mil needs to go lol jus get a gilly 12's carb (20.5) and a 125 inlet and ull be fine

 

i had a feeling its abit small but it runs ok strangely inuf lol
whats bad about running a small carb or is it it could just run alot faster with a bigger 1.

was loking at a tnt 21mm carb u no the 1s that r like 45 quid. r they any good?

 

ive never used a tnt one but apparantley there shit

 

fair inuf, any 1 got a gilly carb 4 sale lol

 

useing a small carb will give you less power, also useing a larger carb keeps your engine cooler

 

ah ok, back to he thread lol the problem is still there. i have changed the choke n still no luck any other ideas?

 

have you tried cleaning out your carb there might be some crap blocking one of the jets also try a new plug

 

yep cleaned out the carb about 3 times blown through all the jets n got a new sprak plug in.

 

If it is not choke then, for me sounds like bad wire between spark and coil. Maybe theres problem? Or you have problem with negative cable of coil?

 

yh im thinking something along those lines aswell. have ordered a new stator plate and ht lead hopefully that will sort the problem.

 

have you checked you barrel and head to make sure they are sealing correctly .

 

yh barrel is sealing fine, even if it wernt i think would just runn like crap rather than idle and not rev

 

i would just try a different carb

 

yes i would deffo try a different carb before buying new stator and ht lead

 

too late allready got it n i got no access to another carb unless i buy 1