1984 aero 50 motor swap to a 1985 spree

The place to discuss rides, accessories, or whatever is tangentially Spree/Elite-related

Moderator: Moderator

Post Reply
jdogg330
Noob
Noob
Posts: 3
Joined: Thu May 21, 2020 11:39 am

1984 aero 50 motor swap to a 1985 spree

Post by jdogg330 » Sat Aug 08, 2020 8:07 pm

I just picked up and 84 Aero 50 for 140 bucks and was wondering if it would be a good motor to swap on my 1985 spree?

User avatar
Wheelman-111
Moderator
Moderator
Posts: 11148
Joined: Wed Oct 22, 2008 5:09 pm
Location: Deepinnaharta, Texas

Re: 1984 aero 50 motor swap to a 1985 spree

Post by Wheelman-111 » Sun Aug 09, 2020 1:22 pm

Greetings:

Yes,... if... The trouble with the 1984 is that there are few (if any?) go-slightly-faster parts. Even stock parts might be hard to source, as the design was only sold here for 2 years. Still, the variator ensures better-than-Spree performance in acceleration and overall.
Wheelman-111
Most of my money is spent on scooterparts. The rest is just wasted.
"ISO": '03 Vespa ET4 Malossi187 72MPH
Flash 9: 2001 Elite SR Contesta 72 ZX Tran, 9:1 Gears, Stock Airbox/Carb/Pipe 58.8 MPH
Punkin: 2010 Vespa/Malossi S78, 61MPH

User avatar
harleyracer59
Elite
Elite
Posts: 301
Joined: Tue Jun 05, 2018 3:56 pm
Location: Nickastan ca

Re: 1984 aero 50 motor swap to a 1985 spree

Post by harleyracer59 » Mon Aug 10, 2020 7:52 pm

i have an ab07 bthat does 60mph. they are a great engine. any performance gy6 variator can be used on the engine by drilling out the boss from 14mm to 15mm.
the same adapter used on the af05 can be made or purchased to use a ct dio reed intake.
af 16 dio performance exhausts can be used on this engine by cutting the exhaust flange and turning it 90* deg and rewelding it.
as far as big bores go, i added material to the cases and opened the ports to match up with a af01 lead cylinder. lots of bbk made for the af01. i havent vareified it yet but a pgo star cylinder looks like it will bolt right on. same stroke, same exhaust flange ports look the same and all research i have says cylinder studs are same spacing. only reason i havent tried it is i have 3 different af01 bbk that i still wanna try. my polini is still doing great 2.5 years later.
the final gears are low great for top speed, and the stroke is bigger than an af05e, that helps low end torque. it is faster than all my built af05 engines.

Post Reply