Mikuni VM36 carburetor

[maxi81]

I'm after a new carby for a RM 400T. In the manual is says that the carby is a Mikuni VM36SS. I found a VM36 carby on the vmx unlimited site and I assuming this would be the same one??

Max

[Stevo17]

I think it would be nearly the same. You probably need to change the needle jet, main and pilot jets.  Not sure about the RM's, but on the KX's you need to cut the back of the carb off (about 15mm) where it goes into the air box manifold.

[JohnnyO]

That carb should fit your 400 ok. I would just put your original main jet in and see what pilot jet it comes with before changing. The new needle and needle jet will be a matched to work together, I'd leave them alone and try it.
Unless they offer to set it up to suit your RM400 with the std jetting specs..

[BEARVMX]

NO no no, to get it right these are almost perfect- the actual carby fit is ok, you will need to change the main jet ,pilot jet and the needle jet holder, main jet std should be #270 std from factory, pilot jet #50 from factory,needle jet (jet needle) r6 from factory, the only things that are right is the needle 6fj6*** and the slide 2.5 cutaway they come out to us with 3 out of 5 things wrong, way too leen trust me Bear

[JohnnyO]

These Suzuki's come too rich from the factory, the new carb comes with 35 pilot jet which is on the money and a R5 needle jet which is fractionally leaner than the std R6, 1 clip position will fix that.
As i said before i would fit the std main jet to the new carb and try it.
If you really want the bike to perform i'd be fitting a new 38mm carb, 36 is small for a big bore. They need the extra grunt against YZ465's and 490 Maico's. Pretty much all the other 250's and 500's from the era ran 38 carbs.

[oldyzman]

I thought the same re the 36, i even looked up the spec and was surprised to see it was a 36 was standard and not a 38. If he does fit a 38 can someone please advise a start point for the jetting as it will be so far off the 36 spec. To the point that the main may even be in the 300's.
Maxi, sincere question- what do you want to do with the bike and whats your personal riding capability?
Brett

[JohnnyO]

With a 38 I would just go up a size or 2 in the main jet from the std carb and try it with the rest of the jetting that comes in the new carb. If needed you can swap the jets over from the std carb.

[maxi81]

Thanks for the info guys.

Brett- I won't be racing the bike, just riding the bike for fun. I would call myself an intermediate rider.

[oldyzman]

So max depends a little on weather you want to muck around with it or if you justwant to bolt on the std carb. If you weredirt track racing then certainly go the 38, in your case probably stick with the 36, what do you think johnny now knowing tne application?
Brett