Did a little drilling to make another slot, and got the pilot screw out. Thanks @Murdo for the offer, I was thinking of you... Cleaned it all up, sprayed a little Inox, and was able to adjust it out 2.5 turns, as I did with the others. It was just seized - the spring, washer and o ring are all there. Bike is not running as rich, and I can now fine tune, but I have other issues. Firstly, it floods - when you stop at the lights, or after its been sitting, it starts but won't rev. This has always happened since these carbs have been put back on. If you wait 20 - 30 secs and slowly ease throttle back, it comes good and off you go - so that needs fixing. Also, it's now sometimes running rough when you accelerate - not sure if this is carb related or electrical. It's almost like when you have bad HT leads, and then all of a sudden it comes good again and flies... need to put other carbs back on to see whether its carbs or something other. Anyway, I'm gonna rebuild a set from scratch...
So the pilot screw adjustment hasn't stopped the flooding? The rough running is too much fuel I think. Reckon you will need to look at the main jet sizes
No it did not. I think there is a prob with this set of carbs... I think it's just a fault that needs to be fixed... I have noticed others on you tube with this problem on FZR's, it's something to do with the idle circuit.. more head scratching/research needed... Not sure what the rough running is either.. could be anything
Let me see if I follow. Mr Grey had a 'chugging' problem after he rebuilt his carbs. The rpm would not increase when the throttle was opened. This problem vanished and the remaining problem was slide No 1 was not lifting. Then Mr Grey fitted your 3LN3 carbs to see what happened. Zoomed around with reckless abandon for some time having fun and making videos. Next said carbs were fitted to your bike and it went to Sydney and Linkin zoomed around and complained of running rich. Which brings us to this point with 'chugging' problem. Is that right? One thing that I find very mysterious about this chugging problem is why would it happen on all 4 cylinders? Sounds more Exup/electrical. Both Ruckusman and Mr Grey had this problem at the same time but Mr Greys' vanished.
Yeah, I know it's confusing. Grey was using my carbs on his bike, and they seemed to work... But, my experience is that when on my bike, it seems to flood after starting or at the lights, and you have to hold the throttle a little above idle (otherwise it stalls - you call it chugging problem).. and eventually it comes good and takes off... this was the case before, during and after going to Sydney. On the way to Sydney, I was only getting 100 - 120ks before hitting reserve, and hence we thought its running rich - as well as the smell.. That's when I started tweaking the Pilot jets... the chugging problem remains... Note: I was using a spare set of Grey's carbs before, and no chugging problem.. the only prob with those carbs is it was very hard to start the bike, but once started, seemed to run fine but with fast idle...
Yes Mr Green ..... same thoughts have entered my head also ...... but instead of coming to any conclusion or posting as such , I just gave up as it made my head hurt. My carbs are waiting patiently on my bench for my return As well as a new clutch , delo oil and filter change and new front 17T sprocket .... plus thermo housing reseal .... and a few other things like fairings.
Hmm... one thing I noticed with my bike is there's a little air hole inside the chamber of the carb on the side near the pilot screws. At the time I didn't investigate where it went but 3 out of 4 of mine were blocked. When I put the Litetek kit in I cleared these up, it was still flooding until I took the pilot screws 2.5 turns out now it's sweet as. Not sure if this helps.
Is this the case? That would be pretty good if they were. I read on there that worn emulsion tubes and/or needles can cause too rich at low revs.. but I guess the experienced guys here would know that...
^^ forget me, I just realised the carbs worked fine on another bike, which cancels out that argument. Your problem may be airflow then. Tried cleaning out the air filter? If it's definitely not the carbs your fuel/air mix could be too rich and you're choking her up a bit.
Yeah, as Grey alluded to, may have the wrong jets etc. in here.. that's why best to build up a stock setup and go from there.. I have a nagging feeling though that there just may be another issue with the carbs... it comes and goes like in cycles... Air box is stock and has been cleaned.
Yeah, I had a look at one of the needles, and it was set to 2nd from the top... just at the stage now to try different stuff, but I might just do a rebuild anyway like you did... might attack it with Grey when he gets back..
Did you look at all of the needles? 2 of mine were set 2nd from top, the other two 3rd from top. All are now 3rd from top and mine is still popping a bit with excess fuel so I may lean it up a little more by taking all of them up a notch.
As I have mentioned on previous occasions this bike was put back together ..... in a hurry Did it get to rego on time ? .... yes it did Did it get to Sydney , around Sydney and back to Tamworth? .... yes it did We didn't even change the plugs or check the leads. These bikes are trial and error ..... theres no simple fix ....even if its simple its damn hard to find ..... way too many variables As Will alludes to and we say it over and over to the inexperienced ....... if its not stock then u will be chasing your tail forever. The main jets and pilot jets need to be checked ...... the clips need to be in stock position ..... emulsion tubes checked for wear .....needles checked for stock....... blah blah blah The PO of this bike was a boy racer ..... he said he did the carbs ...... well fuk me , the first thing u see when looking close is a smashed up pilot screw ..... great job PO You check wats wat and change ONE thing at a time.
If u look at the pics here u will see worn needles and tubes ..... tube pic isn't great but u can see the grooves worn in by the needle on the right hand one http://2fiftycc.com/index.php?threads/my-fizzer.872/page-7#post-11307
Could it be the chokes bleeding, I had to replace the springs as 2 were rusted out & not closing the valve.