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Message started by T And T Garage on 05/11/21 at 20:27:54

Title: After Market Carb
Post by T And T Garage on 05/11/21 at 20:27:54

Hi All - I'm sure this has probably been addressed at some point on here, but I'm not having any luck finding it (please forgive me if this is a redundant ask).

We've put a Mikuni 36mm (VM36-4) carb on our little bobber and it works great for the most part, but I'm seeing some throttle hesitation. I notice it most in 3rd at higher revs - basically, I run out of throttle about 1/2 to 3/4 pull.
It bogs down and I have to assume it's the main jet. Looking at the plug, it looks like we're running a little rich. We're buying a jet kit but we're kind of shooting in the dark...

(Oh, btw, we're using a pod "air cleaner" with just a screen on the carb, nothing else.)

Any help would be appreciated.

Thanks!

Title: Re: After Market Carb
Post by DragBikeMike on 05/12/21 at 11:51:26

We really need more information to help you out.

Where did you get the carburetor?

What jets and needle are currently installed. In particular, we need to know what needle jet, main jet, and slide needle. Those would be the items that affect the range of operation you describe.

What petcock are you running? If it doesn't provide adequate flow you may be running out of fuel at high rpm.

"(Oh, btw, we're using a pod "air cleaner" with just a screen on the carb, nothing else.)"

Please post a picture of your air cleaner setup. What is this screen you describe?

Title: Re: After Market Carb
Post by T And T Garage on 05/18/21 at 09:56:37

73757A06040307370 wrote:

Hi DragBikeMike - thanks for the reply! Sorry I was so vague.

I've actually got some good info from this post:

http://suzukisavage.com/cgi-bin/YaBB.pl?num=1620499963

Thanks again!

Title: Re: After Market Carb
Post by Seipgam on 05/19/21 at 00:14:36

That thread will set you right on the principals but it is referring to the stock carb.
The aftermarket VM36 will take different jet sizes I believe (someone correct me if I'm wrong).
When set up right a genuine Mikuni VM36 is an excellent choice by all accounts.

Geoff.

Title: Re: After Market Carb
Post by Dave on 05/19/21 at 02:41:33

This is the thread in the Technical forum that has the VM36 stuff.

http://suzukisavage.com/cgi-bin/YaBB.pl?num=1262724030

Title: Re: After Market Carb
Post by T And T Garage on 05/19/21 at 11:44:23

Thanks guys!

You can't swing a dead cat and not get great info from this site!! I love it! (read; there's so much awesome knowledge on this site!)

:)