'98 Elite SA50 ECO Build

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burnt_toast
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'98 Elite SA50 ECO Build

Post by burnt_toast » Tue Jan 07, 2020 12:19 pm

Hey guys,
Been years since I've logged a project, but no time like the present, and gonna give it another go :coolcruise:

This thread is to chronicle the build process of a '98 Elite SA50 I picked up roughly a year ago, with only 900mi! Prime suspect for some mods no :naughty: Alas, all I've managed to do since is: removed rear cover, slapped in a Kymco ZX50 variator, rode around a few times. But its 2020 and time to get crackin!

I've built lots of scoots before, fast scoots, street stuff, rat bikes; well this one will have a slightly different purpose. After recently buying a '14 Mitsubishi Mirage and getting into hypermilling, the MPG bug has bit. SO I plan to modify and increase performance, but with economy more in mind than previous builds, hence the "ECO" title. To date, my best on Mirage has been an outstanding 49.6 MPG! While the Elite has averaged 53.7 MPG.. barely better! This needs to be remedied. To start: a few vari options, gears and clutch pictured (trusty pup Foxx inspecting for quality of course). With some partzilla gear cover gaskets on the way.

Follow along as I eek out what I can, while staying 2stroke and 50cc. But who knows what future holds. cheers

elite01.jpg
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elite02.jpg
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elite03.jpg
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Last edited by burnt_toast on Wed Jan 08, 2020 5:17 pm, edited 1 time in total.
too many scoots, not enough time :nervous:
come on 2020! lets turn it around :woot:

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Meatball
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Re: '98 Elite SA50 ECO Build

Post by Meatball » Wed Jan 08, 2020 12:05 am

:popcorn:
I need to find some new haters...the ones I have are starting to like me.

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burnt_toast
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Re: '98 Elite SA50 ECO Build

Post by burnt_toast » Sat Jan 18, 2020 1:44 am

Baseline stats
Intake: stock PA35J carb, stock jets (will verify), stock mani, stock reeds
Exhaust: stock pipe
Cyl: stock bore, stock head
Oil: Castrol Go! 2T (Orielly's)
Ignition: OEM boot, NGK B8HSA -washer +CHT probe
CVT: Kymco ZX50 vari, OEM rollers 6x ~6.5g, back half cover removed, stock belt ~1k mi
Trans: Stock gears, 12.115:1, orig oil presumably 10w40 oem

Prelim CHT readings in current configuration:
1.
ambient temp 51F
cold engine 56F garage
1452mi .842gal 87oct $2.03 2.40/gal
280F max uphill WOT
sub 260F flats WOT
2.
ambient 56F
cold engine 58F
282F max uphill WOT
sub 270F flats lots WOT
3.
ambient 68F
cold engine 63F
281F max uphill post:
269-273F max extended flats WOT ~5mi

Current Performance:
Solid 38/39mph GPS verified top speed, on the flats (42mph recorded, but was after downhill assist)
53.7 mpg avg, over 4x tankfills
baseline_12jan20.PNG
baseline_12jan20.PNG (28.38 KiB) Viewed 243 times

Goals:
Easy 45mph on flats, 50+mph top speed
60+ mpg avg, hopefully better

Methodology:
Keep fueling stock as possible, as long as temps in check. Upgrade intake/carb later on if needed & beneficial. Modify all else, incrementally.

Without giving too much away, upcoming mods to include:
dual density air filter for stock box
cf reeds, ported intake? if hepful
up gear, chosen ratio to be discussed
variator and driven face, several options
clutch, may not be needed but have on hand
cyl & head mods, but stay 50cc
exhuast, several options
Aero mods oooh.. may be silly
Weight reduction

side bar: if she blows, or i get bored on this path.. have 70cc Corsa and Arrow, both NIB on hand to go hamma time :lol: :lol:
too many scoots, not enough time :nervous:
come on 2020! lets turn it around :woot:

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Meatball
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Re: '98 Elite SA50 ECO Build

Post by Meatball » Sat Jan 18, 2020 5:00 pm

Hello Burnt!

PM
I need to find some new haters...the ones I have are starting to like me.

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Ben L.
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Re: '98 Elite SA50 ECO Build

Post by Ben L. » Thu Jan 30, 2020 4:43 pm

Interesting ideas. I'll be following.

Guess I never realized these scoots get such terrible mileage. I bought a 2011 Yamaha C3 50cc scooter brand new and got a best of 137mpg while averaging 110+ mpg. I know its apples to oranges but a swap may eventually be in order :naughty:

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