Honda Spree and Elite 50 Forums

I posted some questions on the Performance section and have gotten some great advice. Figured it was time to post up what this project is.

Bonneville Salt Flats SCTA land speed record for a <50cc motorcycle with sidecar is 62.587mph. I figure there is no reason that cannot be beat. I have raced at Bonneville for a few years with my car, but as that is under the knife for a major change (300mph plans) I need to have something to keep my hands busy on the weekends. I know this will not be easy, but nothing good ever is.

The general plan:

Power mods - minor port work, better reeds, new intake and carb, exhausts system, taller gears

chassis mods - 5" stretch (50" wheelbase minimum per rules), lower by 2", build sidecar, remove all plastic panels and make more aero with less frontal area, taller tires

I will post up some pics and points to ponder as it progresses. I look forward to receiving any good input as I have never built a performance 2 stroke scooter before. Many years owning a performance automotive machine shop, but always avoided 2 stroke stuff. New learning experience for me.

Sidecar 'seating area' is required to be a minimum 12" x 32". I have a ladder frame with aluminum diamond plate to cover it and a support structure that I have a good start on.

made a 5 inch stretch motor mount and relocated the shock mount back and 1 inch up to lower the rear.

HI REV. take a look at cruzingratiot post. 2000 Mystic Purple Elite build (70.1 mph)

Red Eft Performance. check out post, Malossi,Polini,Anything Updated 7-10-13 and Red Eft Performance presents Fabrizi Couple more pics *

graphite9 check out post, Scorpion, arrow, burial pipes, center stands, oko's-n-more
these guys can help. GL

if you can get the Honda elite sa50 94-01 AF16 motor you may have more performance options.
but you can make anything work. try to keep the weight down on the side car. that will help big time. weigh everything. diamond plate, sheet metal, screen, use the light weight you can. that little motor got to work hard. good luck . keep us posted with photos

Revolutionary wrote:Sidecar 'seating area' is required to be a minimum 12" x 32". I have a ladder frame with aluminum diamond plate to cover it and a support structure that I have a good start on.

hi rev. that latter frame look a little heavy? if you don't have to ride someone on sidecar make it a little lighter. nice work.

Greetings:

I'm guessing the strut supporting the ladder frame isn't the only thing you plan for that purpose? Otherwise, even if the "sidecar" is never occupied, that outboard wheel will flap like a wounded chicken. It looks like it needs a lot more support in 3 planes. Another strut to the "L" in the frame ahead of the fuel tank and a third strut to the motor mount area would create a strong tetrahedron to locate that outboard wheel. If the material is aluminum, weight won't be such a problem as drag.

There is a minimum weight on the sidecar that the third wheel must have 10% of total bike weight as sitting on the ground. So far it only weights less than 10 lbs though (steel). The wheel will weigh more than the structure.

It will end up with three support points on the frame - at bottom near motor mounts and adjacent to shock mount on the near side.

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LoveMyHonda wrote:Gearing is going to be the first major hurdle with that engine. There's one choice anymore and it drops it to 7.58:1 which is good for top end but here comes the second hurdle, the power to get there. Those engines are a tad bit weaker than the later model 94-01. You will have a lot more options for exhaust and gears if you change to the later style engine also. You're going to need some good flow.

+1 I agree on the motor. 94-01 elite sa50 AF16 has more gearing and options. you can still use that motor mount with AF16 motor. but, the bolt is to thin you'll have to add spacers on the motor mount bolt. just use the steel dowel pins on kick start cover. if you go with the AF16 motor and that mount.

Sounds like I will be looking for an AF16 but for the time being, most everything I have will swap over. I'll keep on keeping on to get everything up and running then put the new bullet in.

received an OKO 24 and manifold yesterday. Had to make an adaptor to seal it to the block, but otherwise no probs. Now searching the forum for the best throttle cable solution. Looks like this may work http://www.ebay.com/itm/161213881122

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I ran a 21mm oko on my stock af05 bore before my bbk came in the mail. I had the exhaust port ported and I smoothed out all the casting errors around all the other ports with a fresh hone. It was really nice down low and had a lot better throttle response than the stock carb. Only had it for 2 days so not much more to report lol.

I know they don't run very well with a 28 on a stick af16 lol..not enough vacuum to pull a decent signal through the carb..had to upjet like crazy plus add a restrictor to get out to run

Slowly making some progress here. I have the frame built and the wheel mounted with adjustable toe for dialing it in. Final wheelbase is 50.5" and track wide is 32.5"

Sweet! Nice fab work.