carb question

[Danger]

what size of float needle / valve should there be in a 30mil delly mine at the min is 250 thinking this is to low , going to kelso it seemed to be fine on the flats but at hills or when laying the power on it would start to die splutter an back fire as if not enough fuel , any ideas lads thanks D

[wack 63]

No harm in trying a 3.0

[WINTERMODEL150]

Hi,250 float needle sounds about right,sounds a little rich if its spluttering when you open it up ,you will need to do a plug check and see what color the plug is at the point when the bike is playin up,may also be an electrical fault.

Dean

[Danger]

hi its not really spluttering as such , its more like its dieing theres no spluttering going through the gears had that prob last week sorted that , it started the other day when i went to to up a hill it started to bog an backfire the missus said there was flames coming out of the exhaust, managed to get it to top of the hill were i changed the plug it seemed to run fine that was at 40mph tho , an on friday it started again as i went down a small hill on to the motorway i layed the power on an it started again pulled scooter over on level ground an it tookover nicely i turned my lights off an it seemed to go ok till i got about 40 mile off the boat going to kelso an it started again as i layed the power on to go up a big,ish hill anybody any ideas , carb setup it av264 , x7 sec clip, main 120, 55, idel 70 choke slide 40

[stafford]

if your cylinder is a 200 - 225 you need a 300 float needle jet had same problem, replaced 250 with a 300 and alls well now

[Danger]

thanks everyone for the replies,

[goldeneye]

300 in both my 30mm dellortos, and a fast flow tap. no bother with fuel flow. had a problem with starting on my old solid mount a couple of years ago, and thought it was the slide etc. changed the float needle/needlejet to a 300, and started first kick, no pinking, didnt flood etc.

[WINTERMODEL150]

Sounds like ignition if there was flames from the exhaust,have you got a spare stator plate you can try?

Dean

[Danger]

stator was replaced only last year only coverd a few hundred miles , tho i did replace the pickup the other week after an af flywheel that i borrowed hit the pickup , an i also had a woodruff key sheer of as well , could any of this have anything to do with this ,

[WINTERMODEL150]

Sounds like you need to go back to the stator plate or flywheel area!!!

check the woodruff key for a good fit on the crankshaft.

check the ignition timing with a strobe light 17 degrees is my prefered setting on tuned engines.

check the resistances of the ignition coil and the pick up box.

swap the coil for a known good one and roadtest.

Inpect the flywheel boss to see if its loose.

check the wiring has'nt chaffed inside the stator plate housing.

I've had faulty stator plates before with all the readings fine and only breakdown when the engine is running caused through vibrations.

Let me know how you get on.

Dean.