Running tm34 on my rd400 problem

[rd400greenhorn]

So i got tank on just to start her up and go ride to test the gears

Its got the old oem fuel petcock on, fitted with industriel 6,4mm ( 1/4") fuel lines

Does it get fuel enough or is 1 liter of fuel in tank just not enough for consistent start?

[rd400greenhorn]

I mange to get it to run so what with choke on,  plus the left carb is leaking underneath somehwere.. Cant seem to find the problem with that carb. Had it open 2 times now

[Czakky]

Float height? Float needle?

Try to find where it's leaking from.

[rd400greenhorn]

Yeah so iam not sure how and or where do adjust this, allthough the float sits on 1 metal rods, and they seem to slide easily

[ElFuegoBlanco]

There should be a tang on the float that sits on the needle. Bend the tang up or down as necessary to get the proper float height.

The float height is important as it will stop the flow of fuel before it overflows out of the carb, but also allows enough fuel flow to not starve the motor.

I'm not familiar with the VM34, but it should look similar to this.

[rd400greenhorn]

Awsome.
I Will look into it

[Seizer]

When I upgraded to TM34s, I also got the Raptor 660 upgraded Petcock from Chuck. Also went to all 5/16 fuel lines.

[rd400greenhorn]

Yeah so did I.
But when removing the fuel line from it I pulled out the one fuel connection ( brass?)
Not sure what do fix it i put a oem petcock on

[m in sc]

at the end of the day, you need to size it for total area of needle seat(x2) vs total area of petcock opening. that's really what it all boils down to. 

sounds like you had debris behind the needle at the float valve.

as far as the petcock, you should be able to press the fitting back in.

[rd400greenhorn]

Yeah, though Its just a bit to easy to put in or take out.. Might need some strong glue /locktite

Yeah gonna have to adress the total fuelling system on it

[rodneya]

On of my carbs also did that. I scuffed up the end of the brass fitting and put it back with a little bit of JB weld.

[m in sc]

yup. jb weld or green loctite. 

[SUPERTUNE]

I adjust all the big TM carbs floats down some as with the big petcock conversion and the stock 3.3 needle valve size they don't need to be so high like in a wide open throttle dirt bike!
Chuck

[teazer]

Float height is just a crude proxy for fuel level and that's what's important.  Ask Evans Ward if he has a fuel level adapter for your carbs and set fuel level initially 3mm below the gasket surface and work from there.

If not, get a float bowl bottom nut from a snowmobile with a water drain and use that.

[rd400greenhorn]

So have both carbs hanging of the bike
Buttombis taken of, everything looks similar, flot height membran? The one you can adjust up and down is both equal flat?.
I think the one side thats leaking, the floater maybe dont love so freely.