replacment carb

[big jeff]

Ok I hope someone responds to this What would a good replacement carb for a kohler 295 ax2 with a walbro wdb 31? Thanks Jeff

[JDT]

A 28mm Mikuni will work with proper jetting. It involes more than just the carb though as you will need to change the choke and add a fuel pump.

A similar sized Walbro will work fine also.

[big jeff]

how do I know the correct jets and how do you set up the choke

[JDT]

The Walbro used a standard cable to hook up the choke butterfly.

The Mikuni uses a different type cable all together so you would need to replace the cable assy.

Others have made this conversion so someone may offer up jetting combination that is proven.

Lacking that you can use known jetting from a different make around 300cc and be fairly close.

[big jeff]

Todd stupid question how do I know that the mikuni 28 mm is the correct size? thanks for your help Jeff

[big jeff]

I guess anyone can answer how do you find out what size Mikuni carb will replace a Walbro wdb 31

[JDT]

Whatever size other makes use on a 300 cc motor will work on yours.

[Matt]

I would think a 28mm would be fine, considering the 30mm was used on 340 CC free air JDs.

[big jeff]

they don't make the 28 anymore I was looking on line for other 300cc engines with mikuni carbs to get an idea so far no good

[big jeff]

so far it looks like a mikuni vm 32 is what is used on 300cc engines now I have to find out how to jet it . On the other hand I took my walbro wdb 31 the rebuild shop they found nothing wrong with it I installed it on the engine it started but died out still I changed the metering arm adjustment and tried again. I got it to start again but will not idle and ides when I open choke also when I open the throttle. so I think the mikuni is the way to go Jeff

[big jeff]

ok now I need a new metering valve arm mine broke does anyone have a source

[big jeff]

Ok guys I got a Mikuni vm 30 I put it on last night and after I got fuel up into the new carb Blamoo she started and ran Beautifully. now at 75 deg out side air temp she starts first pull no problem> that's without choking. I cant wait until I m riding her on snow. Thanks to everyone that helped with info. Now to clean and assemble the rest of the sled. and wait for snow Jeff

[Waterboy7]

Jeff, what size jets are you running in the vm30? Pilot & main that is? Thanks -Rylie

[big jeff]

200 and 25

[big jeff]

Ok now having some snow I have run it and found that at normal temp no power so I changed the jets down to a 180 main and 20 pilot still once it warms up no power wont move at all cold she ripps so Iknow its not the clutch or timing . any suggestions ?