1985 ZX600r carb switch on KZ650

82KZ305Belt wrote:

Nessism wrote:

VM24's are excellent carburetors.  They are reliable and easy to tune.  Parts are not too hard to find.  

CV carbs are fine as well, but I wouldn't be going out of my way to remove VM's for CV's if you already have a clean set of VM's.  The only thing I'd stay clear of are the VM's with the accelerator pump.  Those are more trouble than they are worth.



 

Oh yay, lucky me, that's what I have. 

Edit: looks like the actuator can just be disconnected, hopefully that eliminates any troubles from the pump if it isn't used?

dustydeck wrote:

That's very cool, reassuring infact. Thanks for the pics. I should see a few parts showing up in the mail this week. Carbs will get an Ultrasonic cleaning first. Can I ask you your  jetting. Is it around 45/115 ?  PABLO started with 45/112 but then he moved to a 4into1 so I don't know if he changed the Main again. THANKS again

Nessism wrote:

82KZ305Belt wrote:

Nessism wrote:

VM24's are excellent carburetors.  They are reliable and easy to tune.  Parts are not too hard to find.  

CV carbs are fine as well, but I wouldn't be going out of my way to remove VM's for CV's if you already have a clean set of VM's.  The only thing I'd stay clear of are the VM's with the accelerator pump.  Those are more trouble than they are worth.




 

Oh yay, lucky me, that's what I have. 

Edit: looks like the actuator can just be disconnected, hopefully that eliminates any troubles from the pump if it isn't used?

Sorry for the buzz kill, bro.  There are two different versions of pumpers; those just with the pump, and those also with a vacuum valve.  These are the version that are more problematic.  The version with only the pump are workable.  The fluid path for the pump puts the bowl gasket, and pump nozzle sealing O-ring under more stress than ideal, but if you get them sealed well, you should be okay.

BTW, since I sell O-ring kits, and sizes are critical, I tend to split hairs regarding things like the pump nozzle O-ring size.  The O-ring fits down into a recess in the bowl gasket, however there is no standard for bowl gasket thickness, so what size O-ring to use is a bit of a guess.  I've upsized those in my kits for this reason.  Kind of a pain to deal with those pumps.  The standard VM's are just fine, and don't need the added pump feature for the most part.  They are in effect an emissions part; to cover a flat spot left behind by lean jetting.

This photo shows the pump carbs along with the vacuum valve.