any aftermarket reeds that fit 1983 NB50M Aero?

[BillMckraken]

Hello,
I've been searching to see if there are any aftermarket reeds that will fit the 1983 Aero 50. I've seen some posts for using the Boyesen #740 reeds on an Aero 80, but haven't seen anything for the 50.
I noticed Boyesen's site lists the Vision 50.....I think it showed a #716; not sure if that ends up being the same though.

I have got the scooter back together (YAY), finally.... And it runs! I've been just going through and checking everything is working properly, so I haven't gone on a ride yet. So, I'll still have to test drive and tweak the carb. Should get a compression test soon also; ended up ordering a gauge. Still hoping for a good rear wheel also.

sorry to ramble; my interest for the reeds was for 2 things.
-One, if they broke or went bad it would be nice to have a spare.
-Two, from reading if I understand correctly; some reeds can help acceleration (hoping for less boggy?)

So is there a better reed that bolts right up, or does it require changing the intake and carb also?

Thank you, Bill

[BillMckraken]

I just realized I probably should have put this post in technical discussion and I apologize. I am not super familiar with forums, but I'll try to get it right in the future.

Is there a way to move this post, should I start another in technical (don't want to post too much)? Otherwise, sorry again for the wrong area.

thanks bill

[Bear45-70]

I would like to help here but my experience with the 1983-'84 Aero is nil. As for reeds, even though the gaskets are different sometimes the whole reed block assembly can be swapped.

The obvious up grade, at least to me is the Aero 80 reeds. But without hands on I have no clue if they fit or can be made to fit. Using this reed assembly would easily allow the use of the Aero 80 intake and larger 16 mm carb. It will also allow you to opt for the manual bystarter and skip the automatic one.

Then of course there is the option of making your own reeds for your stock reed cage. Buy a sheet of carbon fiber material and trace your stock reeds, cut them out and "voila" you have aftermarket reeds.

[mbilderb]

Bill,

Keep us posted on what you do and what works. Vacations have put my restoration on hold, so I haven't torn into the intake yet.

On ebay, eBay Member: triumphman2630 <triump_hzw2847rho@members.ebay.com> had some parts for Aero's for sale. I bought an airbox, light and right switches for an 83 from him. You may want to contact him for any other parts you are needing.

[BillMckraken]

Hello,

Thank you for the responses!
@ Bear, ya I was pretty sure I could bolt up an Aero 80 Block, intake and carb; but had hoped (for now) to keep the stock items. Also I finally found the post about your manual choke, hoping to adapt for mine; but was bummed it was for the 80 and vacuum driven.

I called Boyesen and they wanted pics and dimensions, so I have removed the intake and block. I'm actually glad I did; the top reed block gasket was wet (gas) all the way to the edge on 2 sides!! I'm gonna assume that's bad.

I'll try to link the pics and dimensions here, hopefully they will just show up (I'm a forum noob). I can get dimensions for the block also if that would help.

<a href="http://s615.photobucket.com/albums/tt23 ... eedtop.jpg" target="_blank"><img src="http://i615.photobucket.com/albums/tt23 ... eedtop.jpg" border="0" alt="Reed Top"></a>

<a href="http://s615.photobucket.com/albums/tt23 ... bottom.jpg" target="_blank"><img src="http://i615.photobucket.com/albums/tt23 ... bottom.jpg" border="0" alt="Reed Bottom"></a>

<a href="http://s615.photobucket.com/albums/tt23 ... ension.jpg" target="_blank"><img src="http://i615.photobucket.com/albums/tt23 ... ension.jpg" border="0" alt="Reed Dimension"></a>



I have emailed boyesen, so I'll wait and see what, if anything, they have. Hopefully they do.

I am curious though, I've tried ordering these upper and lower reed block gaskets from a couple places and they are discontinued. Where do I get new gaskets for this? Or do I call Goober and put on some silicone?

Thank you,
Bill

[BillMckraken]

*, I'm a retard....Sorry

here's just plain links. Sorry

http://s615.photobucket.com/albums/tt23 ... ension.jpg

http://s615.photobucket.com/albums/tt23 ... eedtop.jpg

http://s615.photobucket.com/albums/tt23 ... bottom.jpg

[Bear45-70]

From your measurements the Aero 80 reeds #740 may well work (first pic).

The #740 reeds are:

1.413" wide (total width)

1.465" tall

.647" width on each petal

The mount holes are .74" center to center

Oh and for my Aero 125 I actually sent them a set of my reeds, they were returned to me.

[BillMckraken]

Okay I measured the angled face (ramp) on the reed block where the reeds rest. The overall width of this face is 1.410" and the overall length is 1.55". Length was measured from the top of the ramp to the lower edge of the mounted reed (not removed yet). There is also a plastic "pin"/nub that sticks up between the reed petals, down by the screws.

So it does appear that the #740 will fit with maybe just a little modification. Since the Petals are wider, the gap is more narrow then; correct? The pin/ nub will have to be narrowed a bit, but no biggie. Length looks fine, but width may be .003 wider; I suppose it's possible that it will need trimmed slightly?

I will be curious what number Boyesen emails back with. Least I know something that should work now!

Thank you very much for measures Bear!

Thanks
Bill

[Bear45-70]

Actually the #740 reed is a two stage affair. The bottom reed is full width and one piece with two slots cut in it that are .456" X .676" over each port in the reed cage, with 2 individual smaller and lighter reeds over each slot. This setup improves low end throttle response will also improving top speed.

The stock Aero 80 reeds compared to the Boyesen two stage reeds.





Aero 80 reeds compared to the SA50 reeds.

[mtully27]

hey my friend malossi make one on sipscooter shop i receive it with my big bore kit het hey !! ihope it help but also the nh80 reeds work great as you already know!

[BillMckraken]

Well, I got my first response from Boeysen; although I don't believe the number will work.

The said if I had a max dim of 1.5" x 1.55" (all other measures fitting) then their #711 would fit.

I let them know that my max width was only 1.41", so I'll see if they shoot back another model number.
I just figured I'd post the measure for the #711, maybe it will fit in another model and would save the time emailing them.

I did mention the #740's measures to them (being correct width just too short), maybe that will help.

It is very possible, it seems, that the #740 may end up being the closest fit

Thanks, Bill

[Bear45-70]

The Aero 80 reed block is 1.157" wide and 1.460" long. Have you considered dropping the Aero 80 reed assembly in your engine? That is if the reed portion will fit into the engine intake. Then you could take advantage of the bigger intake and carb (16 mm) from an Aero 80. I know it is not stock but Honda restricted the * out of the intake side of their scooter engines and a bigger carb is a quick and easy upgrade for performance.

You do know that Boyesen measures the reeds to the back side of the reed hold down plate and not just the part that moves?

[BillMckraken]

The Aero 80 reed block is 1.157" wide and 1.460" long.

so then the #740 reed is wider than your block? If I'm understanding....I wasn't sure if they could overhang any. (block 1.157" reed 1.413")

As for the Aero 80 setup I have considered it because of it being "simple". Especially if they end up suggesting the same reed #. I'd have to check on pricing / avail. for the 80 carb and intake. Also, I'd have to go over your post on the choke again .

For fitment I'm not sure. I did take a couple of measures from the block, though;

just measured bolt holes on block. The bolt holes by the reed screws are wider than the ones at the "moving" side of the reeds. From the side the width is the same.

screw holes (reed mount end) - 2.10" oc
screw holes (reed move end) - 1.97" oc
screw holes (side spacing) - 1.23" oc

Not sure if this is enough to check fitting. I can measure the block outer dimensions if needed.

Thanks, Bill

[PimpinSpree]

bear, would you gain anything from aftermarket reeds? I understand the concept, but do they actually make a difference?

[Bear45-70]

Bill, Dyslexia in action and not proof reading. The reed block is 1.49" wide just remeasured.

Pimp, Yes the really do help. They react quicker for better low end response and with no reeds stops, allows them to open farther for better top end. They do work if you have enough carb to take advantage of them on the big end. I doubt with a stock carb if the top end will improve or not much, but the bottom end will be improved, especially with the dual stage reeds like the Boyesen #740 reeds.