2000 Suzuki 500 Quadmaster - Mikuni Carb Info

[suzuki22]

Hello everyone I am new to this forum.

I am working on a Quadmaster for a friend. The only thing I have left to replace is the rubber diaphragm in the carb. I think I have cross referenced it to some other models that actually offer the rubber part only but I am not sure. The rubber part is screwed on on this slide and not pressed on. Has anyone replaced just the rubber on this model? I have seen a website that offers aftermarket rubbers but they all look much thicker than the one that came on this bike.

General Mikuni carb question. I cannot find solid manual information for this year and model online. Everything that I read says that it has a Mikuni BST34 Carb. However all I find is BS34 and all of these appear to have a round slide. This carb has a flat slide. All the Mikuni flat slide carbs that I find online do not look like this carb. I would think that I should be able to order a rubber diaphragm for the specific carb regardless of what it came in...

Any help will be greatly appreciated.

[oxidized_black]

a 1998 yamaha big bear uses a bst34 carb. there are lots of rebuild kits on ebay from suppliers like moose and sudco. here is a link for the breakdown of parts if you need individual ones from bikebandit,com ... 1998 Yamaha Big Bear 350 4WD YFM350FWBK Parts, 1998 Yamaha Big Bear 350 4WD YFM350FWBK OEM Parts - BikeBandit.com

and this is the breakdown for your bike they have listed ... 2000 Suzuki LT-A500F Quad Master Parts, 2000 Suzuki LT-A500F Quad Master OEM Parts - BikeBandit.com .... which do you have?

Edited November 22, 2013 by oxidized_black

[suzuki22]

Thank you for the additional cross reference. It appears that the big bear has the same slide diaphragm.

However, it appears that they dont offer just the rubber for that bike either. Im not willing to pay $150 for a piece of rubber.

Has anyone used the diaphragms from jbmindustries? They look thicker than the rubber on the factory BST34 slide.

[oxidized_black]

here is a good link for mikuni, MikuniPower.com - Mikuni Distributors . i know it is ridiculous that suppliers try and nail you 150$ for a damn 2$ piece of rubber. maybe the other option is contacting someone (dealer) on ebay and having them look out for that piece.