are the carborator reed valves supposed to be open or closed on a 1999 yz 250?dirt bike
reed valves depend on engine vacuum to operate. the reed valves are closed when the engine is off and as the engine load goes up, it requires more fuel so engine vacuum goes up causing the reed valves to open more, letting in more fuel. So, is the engine running or off?. are the reeds bent? if they are, they might be straightened if u use care. they break ez.
the aggregate is slightly skinny. The exhaust will smoke much less, however the appropriate end will ware quicker then standard. replace the piston rings as quickly as a 12 months could shop the engine risk-free.
