VM Mikuni round slide

It should fit the stock intake boot. But you will need to get a different air filter since the stock boot won't fit it. Shouldn't need to enlarge the intake port, either.

Is your SR engine modified or stock?

General opinion is that a 38mm is too large for a stock engine. A 36mm will give you basically the same top end improvements with out the bottom end and off idle responce problems that you can get when you fit a 38mm to a stock engine.

CJ

tc- in general the SR500's will actually start a tiny bit easier with the stock 34 Mikuni(78,79) or the stock 32 Mikuni(80,81).
However this assumes the stock carb has been soaked and all the tiny passageways are clean. You usually don't have to track down the 3 expensive diaphragms(one accel pump, one anti backfire, and the last might be-I forget- maybe it prevents the accel pump from squirting out fuel when you twist the grip with the motor not running??)

The 36,38 Mikuni roundslides are generally easier to keep patent,so they are usually more likely to start well once they get older.
I probably have WBros 38 roundslide jetting specs somewhere if you need them.

Charlie

tc- naturally enough after 30 minutes of looking I found all sorts of jetting-everything but the VM 38 roundslide. Eventually I'll find it and post it.

Here are White Bros specs for their VM 36
MJ- 220-240
PJ 30-35
CA-3.0
6DH3-2 NEEDLE IN SECOND SLOT
NEEDLE JET P-8
17-19 MM FLOAT
1 3/4 TURNS OUT PILOT SCREW ADJ

For the 36 FLATSLIDE PUMPER MIKUNI-from VD Classics
MJ-135
PJ 25
Needle jet P-6 #568
NEEDLE 9DZH5 50
AIRJET .8

I'll eventually find the VM 38 SPECS
Charlie

Thanks cafekid I havent fitted it yet just getting things ready if you know what I mean TC

I think MArk Apland at Thumperstuff has an intake for the 36mm VM.
www.thumperstuff.com/

The 36/38mm Mic's go straight into the standard manifold because they're made to suit a Mikuni carb.

My SR riding compatriot Lee from down the coast, did me a favour the other day and used his Dremel tool to take out the 'head side' ID on a standard manifold I had to 38. That was done to suit the 38mm Mikuni VM I am now fitting. Thanks mate.



Neat job and it helps with through flow...as does blending in the head to suit the larger carb at the manifold to head intersection.

Out of interest for those who don't know, the Mikuni and Kei Hin manifolds differ internally as to the position of the rib that holds the carb in position...so best not to try to make a standard Kei Hin carb fit into a Mic manifold...you can force it in and clamp it up, but best to get the correct manifold to start with.

Interestingly the Japanese make a Kei Hin CRS 38mm carby kit for the SR and various size FCR kits as well. Beside having SR compatible jetting out of the box, the screw-in manifold adaptors are made with a Mikuni type spigot so they can go straight into a standard SR manifold...nice touch...

SR