Yamaha FZ1 choke system problems
Wednesday, November 26 2008 @ 10:51 AM ICT
Contributed by: news
When you turn on the enricheners, you open a plunger valve in each carburetor that allows engine vacuum to draw a very rich fuel mixture into that carburetor's bore, just on the engine side of its butterfly valve. It has much the same effect as a choke but achieves it in a different way.
Second, if you are encounter an explosive bang out the exhaust when you open the throttle, it is called 'fterfiring', and not be mistaken by 'backfiring'. It is so named because it occurs in the exhaust, after any unburned mixture has left the combustion chamber.