aviator79

Cleaned carb DR250 and small jet in float bowl IDK what its for? 1990

25 posts in this topic

Okay,

Near as I can tell there should be only one o-ring and one gasket involved in the fuel enhancement circuit, along with the passageway drilled in the carb.  Behind the "choke" knob should be a hex fitting which is securing the enrichment plunger to the carb.  Behind this is where the gasket could be leaking.  The o-ring is at the end of the plunger passage and actually seals off the fuel flow when the plunger is pushed in.  I tried to attachthe DR-350SE Shop Manual for illustration.  I don't know how well this will translate to the DR-250.  Look here. 

Suzuki DR350 motorcycles, 1990 - 1999.

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Almost done putting it back together but I am not sure I can get the plunger to seal on the carb without some sealant or something so think I will get some silicone grease (solid, not spray).

I was unable to get a wire to go thru one of the front jets.  I can get carb cleaner to spray thru it and I can catch the hole in the main jet tube but I wonder if the main jet tube is twisted slightly so the hole does not line up.  There is also a hole on the intake side that may just be a dummy hole that is used for 350 or other bike but I cannot trace it with a wire either.

Along with that I am not clear as to what the hoses coming off the carb do or where they go.

Front right is plugged. I will redo the plug I made.

Rear right goes up into frame. For oil pressure?

Tiny bottom just seams to be a drain?

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Edited by aviator79

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Posted (edited)

On 9/30/2017 at 1:35 AM, aviator79 said:

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Still not sure if this jet is working right but cannot remove so we will see...

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This is a vac port that would go to vac port on Petcock if you had one.

 

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This port is some vac release hose and mine hose was clogged which was probably part of my issue

http://advrider.com/index.php?threads/dr350-thread.230695/page-14#post-5864925

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This hose needs to be clear as a vent for bowl.  Mine was clear.

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I sealed this with permatex #2 form a gasket. 

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I am still not clear on these ports/jets.

 

Edited by aviator79

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Posted (edited)

Also the o-ring that I got from here 13374-46710

http://www.thisoldtractor.com/for_sale_dr350_orings.html 

for the float cage was too large and would not seat.  This could have been another issue.

I replaced it with the one that came in the kit I bought and it seated properly

K&L Economy Carburetor Rebuild Kit #18-9310 Suzuki $23.63 shipped

I also replaced the float valve, float valve seat w oring and float bowl gasket with what came in that kit.

I am missing one seal 13556-44B00 that goes on both sides of the throttle shaft

#14:

https://www.cmsnl.com/suzuki-dr250se-1990-l-usa-e03_model15951/partslist/BLCK0009.html#results

It is basically a felt seal to block air and debris.  I put on oring on shaft and filled with grease so hopefully will work without it for now.

Now to install and see if runs...

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Edited by aviator79

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