well went ot cleaned the carbs on the new one. it was backfiring a bit .the pilot screws were one and a half both. set them to two and a half. put it all together and it wouldnt start without easy start.gggrrrrrr fired in the end but so lumpy and wont tick over,the tickover screw makes no difference . checked the diaphrams,all ok,cleaned them all again still the same,vac pipe ok but took the fuel tap apart, seemed ok. tried the yellow ones tank,still the same..
but iv had that many dam things apart. doh cant rem the order the fuel outlet goes back to gether. and cant find any pics of it even in the manual???
Have you tried opening the float bowl drain screws and checked to see if you have any fuel actually getting to the carb. That should tell you if the fuel tap is on and the vac switch is working. I used to stick a separate hose on my tank vac and then suck gently on the pipe to open the valve manually so I didn't have to rely on the engine vac.
Also, when you say "stripped the carbs and cleaned them" how far did you go? Could you have the wrong jets in the wrong carb? or did you split the two carbs and may have the balance so far out one of the butterflies isn't shut? Could you have left cleaner in one of the air tracks.
Put the pilot's back to 1.5 turns. At least the bike was running even if it was popping and then double check everything. Another quick check is to get your fingers under the slides and manually lift them up and down. They should move smoothly and you can feel/hear the vacuum if you are careful
Pete.l
My new ride is a bit of a Howler and I love to make her Squeal
cheers lloydie.
by strip i mean just float bowls of and jets out. they had a little dirt but not enough to stop it running.the vac on the tank must be working ok as i tried the yellow bikes tank on it that i know is good and it made no difference. jets didnt get mixed up as i done one at a time..front is running fine just the rear.
i did notice i can blow down the petrol pipe going to the front pot but noth the rear one?.
rear bowl at petrol in it but not as much as i thought it should have.. il pull them apart again an see if iv missed anything..
also trying to find a diagram of how the tank outlet goes together, as in the order of membrane.spring etc?
fabiostar wrote:
also trying to find a diagram of how the tank outlet goes together, as in the order of membrane.spring etc?
IIRC, from the front of the bike back its: flue tap; metal plate with the vac tube outlet; diaphragm with the plastic bit to the front; spring; back plate.
Last edited by freeridenick on Wed Jan 11, 2017 4:45 pm, edited 1 time in total.
fabiostar wrote:
also trying to find a diagram of how the tank outlet goes together, as in the order of membrane.spring etc?
IIRC, from the front of the bike back its: flue tap; metal plate with the vac tube outlet; diaphragm with the plastic bet to the front; spring; back plate.
happys days. i just wasnt sure which side the spring went onto
right, this just isnt going into my brain.. is there any pictures on the net of how this stupid thing goes together. iv looked and i cant find what goes were inside the vac fuel thingy watsit madoo..
On reflection, I might have given you the wrong order . It was a while ago that I replaced the diaphragm in mine.
The spring keeps the valve shut and the vacuum opens it so it makes more sense to be fuel tap, diaphragm, spring, plate with the vac tube outlet, back plate.
Are there 'sockets' that look they'll take the spring on the diaphragm plastic bit and the vac plate?
freeridenick wrote:On reflection, I might have given you the wrong order . It was a while ago that I replaced the diaphragm in mine.
The spring keeps the valve shut and the vacuum opens it so it makes more sense to be fuel tap, diaphragm, spring, plate with the vac tube outlet, back plate.
Are there 'sockets' that look they'll take the spring on the diaphragm plastic bit and the vac plate?
iv lost the spring anyhow lol.. and the rubber on the smal side didnt look to great anyhow.
but.
pulled the carbs off, cleaned them again even tho i found no dirt. set the pilot screws to one and a half turns out. hit the button and bang away it went. shes still blowing a bit of black smoke,thankfully not oily smelling but id say its still running rich but i have to say, its quick to pick up revs ....it ticks over but sounds a little like a yank v8 ticking over but its running smooth..
so i takes a peep behind the engine cover and found a rather small flywheel .
. checked the diaphrams,all ok,cleaned them all again still the same,vac pipe ok but took the fuel tap apart, seemed ok. tried the yellow ones tank,still the same..
. It was a while ago that I replaced the diaphragm in mine. 
....it ticks over but sounds a little like a yank v8 ticking over 
but its running smooth..
