What Are Reeds On A Motorcycle?

What does a motorcycle reed valve do?

Reed valve allows the mixture to move in only one direction – from the carburetor to the crankcase.

It prevents the mixture from moving back to the carburetor.

In the effect reed valve improves reloading of the combustion chamber with fresh air-fuel mixture..

How do reeds work?

How do reeds work? A reed consists of one or two blades of a material like cane or plastic, and when air is forced through it, the air pressure causes it to close. As soon as it closes, the drop in pressure caused by it closing, along with the air pressure inside the reed, pulls it right back open.

Do 4 strokes have reed valves?

There is no need for a reed valve on a 4 stroke cycle engine. On a 2-stroke they are used at the bottom of the crankcase to let stuff in (through the carb) as the piston goes up, and block it as the the piston heads down.

What is reed used for?

Dried reed stems have been used for millennia as thatching and construction material, in basketry, for arrows and pens, and in musical instruments (see reed instruments). They also are harvested for their cellulose content.

Why are reeds so expensive?

So yes, reeds are expensive to buy. But clearly, they’re also very expensive to produce. The process takes years, AND it requires large amounts of land located in a very expensive part of the world. It’s labor intensive and Employees in France actually cost a fortune.

Can you flip reed valves?

Yes, you can flip reeds. If that doesn’t fix the reeds not sealing, get new reeds. As for your compression, pull the head and check the bores.

Do reed valves affect compression?

NO, the reed valve, in 2-cycle engines, does not effect compression in the cylinder. It will, however effect the pumping action in the crankcase. The fuel/air charge will not be effectively drawn in and compressed in the crankcase if the reed valve is malfunctioning.

Do all two stroke engines have reed valves?

Since a bad reed valve can be the cause of a variety of problems, knowing if you even have these can be useful – not all 2 stroke engines use reed valves. If it just “dumps” into crankcase, like diametrically opposite cylinder, most likely it’s got a reed-valve. …

How long should reeds last?

For those just starting out, reeds can last up to six months. Once you play and practice more frequently, this “cycle” can take anywhere from 2-4 weeks.

How does a 2 stroke engine work?

Two-stroke engines work by combining more functions into one piston-movement; during the upwards movement of the piston (compressing the air/fuel/oil mixture) in the combustion chamber, underneath the piston a fresh mixture of air/fuel/oil is drawn in the hermetically closed crankcase.

What happens when a reed valve goes bad?

As reed petals age, they loose their straightness, may break off, become chipped, and bend more easily. As a result they will not do their job. The result is that the engine may not idle or start well nor reach full output. The engine may also “spit” at the carburetor and drip fuel excessively.

Why do reeds need to be wet?

Quite simply, by moistening your saxophone reed, you are making it easier to play ! The moisture makes it softer. And therefore this makes it easier for you to start it vibrating with a combination of your breath and your embouchure (face/mouth muscles).

Do reed valves make a difference?

SPECIAL REED VALVES: TESTING ON THE ENGINE BENCH. Every detail is useful to increase performance when preparing an engine. The machining of the intake and cylinder of the crankcase is the crucial way to maximize power, but also to assemble the right reed valve and the right reed valves give advantages.

Will bad reeds cause no start?

Most outboards will wear the reeds and produce a bit of pre-loading, never seen that make one hard to start. If a reed is cracked or broken, it will idle horribly, have no hole shot, but run well on top end.