Honda Spree and Elite 50 Forums

I ordered a set of Boyesen #740 Power Reeds. $16.95 for the reeds and $7.35 shipping for a total of $34.30 for two sets of reeds.

These reeds are listed for the Lead 80, which is the European version of the Aero.

Super simple install 2 screws and nuts. You will notice that the reed stops are deleted, which allows the reeds to open farther, also these are two-stage reeds.

I've used this style of reeds in several engines, from stock to race motors. Improved low end throttle response and more top speed (power and RPM).

Once the weather warms up enough to install them I will and report the results.

Great find Bear, and I would think a very impressive mod for the cost. Let us know about how your testing goes. Thanks for sharing dude. I never knew the Aero 80 reed block looks similar to the af16 block. (probably much bigger though)

Jon

z50r-ghost wrote:Great find Bear, and I would think a very impressive mod for the cost. Let us know about how your testing goes. Thanks for sharing dude. I never knew the Aero 80 reed block looks similar to the af16 block. (probably much bigger though)

Jon

The actual reed block is the outside physical same size. and uses the same bolt battern However the openings into the reeds them self are bigger.

Inlet reed opening
AF16 25.36 mm X 19.91 mm.
Aero 80 33.86 mm X 22.38 mm.

Outlet
AF16 28.02 mm X 20.02 mm
Aero 80 33.84 mm X 21.73 mm

Along with Aero 80 intake manifold which is a lot bigger in diameter, IMHO, this would be an and cheap upgrade for the intake.

Af16 intake 16.82 mm opening at the carb.
Aero 80 intake 19.40 mm opening at the carb.

Otherwise this intake will handle an bigger PB carb than the AF16 setup. The Aero 80 carb is a 16 mm venturi and the throttle bore is 19 mm where as the Af16 PB carb has a 16 mm throttle bore. At the reed end both manifolds match the reed opening.

Oh and I have three of the Aero 80 intakes and reed set ups on hand.

Pictorial comparison of the SA50 Reeds and the Aero 80 (actually the HF01E) reeds.

Inlet side.


Outlet side.

just tried to do this swap.
took my aero80 reeds tried to put them on my aero50...didnt quite fit.
seems the plastic part is a bit too big to fit into the slot. yes, the bolt pattern is exactly the same, but i couldnt get mine to go into the hole.
it may be that some of the gasket gunk was taking up a bit of space, but my aero50 one fit right back in, aero80...not so much.

Dremel the reed cage off a bit. My God it ain't like the stuff is concrete.

You could always open up the case a little too. There's enough room for it to still seal if you remove a few mm.

great post Bear, I may have a chance to get an 84 aero 80 thats road ready real cheap and this would be great to pop in right away.