The Edelbrock XR650L carb for $299 on Ebay is NOT a pumper carb. The picture of the carb in that listing is actually the XR650R pumper carb, but that's not the carb you'll get. The Edelbrock XR650L carb looks just like this, but does not come with an accelerator pump. You can however buy an Edelbrock XR650L 'pumper' carb from Barnums whose been doing this for sometime. Rob Barnum spent years doing R&D work for Edelbrock on various products and knows this carb inside & out along with building XR's. That Mikuni that Dutch referred to looks like a good buy and is a great carb once its tuned.