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Another carb dilemma

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Another carb dilemma

PostAuthor: Jaycyorkshire » Sat Aug 04, 2018 12:14 pm

Hi I’ve got a progress thread some might have seen I have a 91 xv535 just been trying to make it road worthy and make a chopper bobber type thing!
Originally been sat for a few years and had a back fire on the rear cylinder
So I cleaned the electrics where I could and changed the carb bends, plugs, fuel filter and air filter, it had a new fuel pump on it before too.

Finally got the annoying carbs back on and fired it up, took some doing the back cylinder was only getting warm so was going to open the screw on the bottom on the float side but it’s all rounded off already!!
Is it a new set of carbs or can I fix it? And is there another way to get it running right?

Any answers appreciated


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Re: Another carb dilemma

PostAuthor: bstig60 » Sun Aug 05, 2018 10:25 am

Are we talking about the pilot screw or the bowl drain screw? You can try taking a Dremel tool and cutting a new slot in it...But be careful...
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Another carb dilemma

PostAuthor: Jaycyorkshire » Sun Aug 05, 2018 2:50 pm

Sorry It’s the one that’s under the diaphragm covers set in a good half inch
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Re: Another carb dilemma

PostAuthor: daz1985 » Sun Aug 05, 2018 5:04 pm

That is the pilot screw, Mine were both like this. I left some penetrating oil in overnight and with a sharpened flat head gently tapped the butt of the screwdriver while simultaneously turning anticlockwise, the sharp screwdriver should bite in enough to get it to get it loose. Once it is out just cut a new slot in before fitting. I would recommend thoroughly cleaning out both carbs as the pilot jet and channels are easily blocked with crud.
My pilot screw channel had metal fillings in it as well as the pilot jet in the jet block that I only just got clear today by blasting engine cleaner with an airbrush through the pilot screw (pilot screw out) and pilot jet (capped by the smaller of the 2 rubber bungs) in the jet block.
Hope you have some luck getting it out!
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Re: Another carb dilemma

PostAuthor: bstig60 » Sun Aug 05, 2018 8:06 pm

Correct, that's the pilot screw.. The screw driver trick is a good thing to try.
Bill
"It´s a friggen motorcycle, it´s not supposed to be comfortable, quiet or safe. The wind noise is supposed to hurt your ears, the seat should be hard and riding it should make you s**t your pants every now and then. "

Please take the time to edit your profile to show your location. City, State/Province and Country. It is easier to help you if we know where you are.

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Re: Another carb dilemma

PostAuthor: Jaycyorkshire » Sun Aug 05, 2018 11:18 pm

Thanks for that I’ll give it a go! Is there a usual setting for them I.e two full turns from closed or what ever?
The bike was last mot in 2014 it’s going to be nice to get it back on the road it deserves it [emoji23][emoji23]


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Re: Another carb dilemma

PostAuthor: Bern » Mon Aug 06, 2018 3:04 am

Hi bud, initial setting is 2 1/2 turns out from closed (gentle seating) Pilot jets can be got from Motocarb, third item down on this page .... http://www.motocarb.com/mikuni-pilot--air-jets.html .... #35 for UK models or if yours is US import #32.5, if unsure check original jet (it's stamped on the side)

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Re: Another carb dilemma

PostAuthor: Jaycyorkshire » Mon Aug 06, 2018 4:26 pm

What a star! Hopefully I can get the chewed one out! Dying to take it for spin I’ve got my theory tomorrow
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Re: Another carb dilemma

PostAuthor: Jaycyorkshire » Fri Aug 10, 2018 6:57 am

The brass is just too soft it’s not playing ball at all! If I take the carb apart can I re tap it of am I better off just getting some new carbs?


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Re: Another carb dilemma

PostAuthor: Jaycyorkshire » Fri Aug 10, 2018 6:58 am

And are xv400 carbs the same as 535 just different jets?


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