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Running tm34 on my rd400 problem

Started by rd400greenhorn, July 19, 2020, 07:23:33 AM

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rd400greenhorn

Not sure if you can anything but
First picture  is of the carbs thata been leaking fuel.
The 'tap' is Very slitly Bent down


Second picture

The carb has not been leaking
The tap is slitly upwards


So a first would be adjusting the tap on the leaking carb a little up?
Not sure if that small amount does anything?

m in sc

well the fuel level on the bottom pic is higher so? if level was the issue that would be the one more likely to overflow.  might be something in behind the needle and seat causing it to seep past and leak.

SUPERTUNE

In the 2nd pic... you went the wrong way. Should be below, not up as shown.
Remember TM 34's use 8mm fuel lines (not stock RD 6mm) and use 3.3 mm needle and set size. so at stock setting on the TM 34's they will leak,
When looking from the side in relationship to the float base gasket, the float arm needs to be at 9:30 or 10:00 o'clock.
(lower fuel level than stock)
Chuck
RD machine work, boring, porting, cranks and engine building.


Chuck 'SUPERTUNE' Quenzler III
Team Scream Racing LLC
1920 Sherwood St. STE A
Clearwater, FL. 33765
cqsupertune@tampabay.rr.com

rd400greenhorn

Chuck
Thank you, i Will have them Bent the other way and try that.
How much do I Bent it?

I Will also get some bigger lines on eventually

Not sure what the jetting is, but got a set from you i changed it to from stock


teazer

Check the FUEL level with the carbs off the bike.

I know I keep saying that and it's because it makes a difference. With separate floats it's a crap shoot setting float levels. 

Modify a base nut to take some clear tube.  Evans sells the barbs for some carbs, or get a vacuum adapter and drill and tap the base nut for it or grab a base nut from a snowmobile.  They typically have a barb on the end so that water in the fuel drops into teh tube where it freezes.  You just use a longer tube bent up to measure fuel level.

I think these come from Evans Ward on this forum.

https://www.kzrider.com/forum/3-carburetor/601369-mikuni-vm-33-carbs?start=100#gallery-4

85RZwade

2nd that. I recently bought the above mentioned kit from Evans, and it showed that my meticulous float height setting resulted in a fuel height that was way wrong. Reset my floats to achieve the desired fuel level and my leaking carb stopped leaking and the RZ ran a bit better. Easy-peasy.
I post waayyy too much

motulman

Quote from: rd400greenhorn on July 19, 2020, 10:02:57 AM
Awsome.
I Will look into it
the two lil black floaties need to be level with each other also ok or the bent tang wont make a difference

rd400greenhorn

Yeah so iam gonna try this, see if it changes anything