anyone have a good source for my dual carb 500? id like to get some input as well... my amal 626's seem like they are useless on my bike. slides are worn, the idle mixture adjustment doesnt seem to work, and I just cant get the damn bike dialed in to ride. who sells a good kit, and what can I expect to pay to make the change? I had my bike running decent, then for whatever reason it went to hell, and I cant get fire on #2 cyl. it runs rich as hell too. i ran vaccuum gauges and one cyl is just bouncing all over, maybe a valve is sticking? I cant get it to level out at idle.