SITO+ is an afternoon job on a 2T

The original 2-stroke Genuine scooter and its 4-stroke manual and automatic offspring

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Mr.FixIt
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SITO+ is an afternoon job on a 2T

Post by Mr.FixIt »

I got home from work, even took time to wash the car, and still got the SITO+ installed and carb re-jetted.

The stock exhaust came off with no issues. A little PB Blaster and gentle persuasion was required to remove it from the exhaust stub, but that was the worst of it.

Per Scooterworks, starting with a stock setup and going to these jets.
Carb, Idle Jet 55-160
Carb, Air Corrector Jet, 160
Carb, Atomizer Jet, BE3
Carb, Jet, Main SI 100

She fired right up and I took her for a quick trip up the hill. The torque difference is certainly noticeable. All smiles here :D

Sorry it got dark. Here's a little video, but you can hear the difference.
https://photos.app.goo.gl/QB33srbRtDN1KzWY8
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Comparison
Comparison
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Eric
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Mr.FixIt
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Post by Mr.FixIt »

Second day riding to work after the exhaust upgrade. Plenty more torque and it seems to rev better now that the engine can breathe. I didn't think it would be as loud as it is with the SITO+.

Is there any point in hanging onto the stock exhaust? I was gonna scrap it.
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Stanza
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Post by Stanza »

I love a low thumpy idle......what's that set at, about 450rpm? Almost sounds like one of those old hit-or-miss engines of yesteryear.
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Post by Mr.FixIt »

I don't have a tachometer to check it, but if the idle is too high the gear seems to clunk harder when putting it into first gear. I opted for a nice low idle so it doesn't clunk so badly. It reminds me of a Moto Guzzi Monocylindre Falcone.
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Post by Mr.FixIt »

Just an update. The clock just turned over 4000 miles the other night.

Everything is running great. Stella can haul my 180lb carcass up a particular hill with an average 8.5% grade at 40mph. That's a significant improvement from stock.
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at 4000 miles
at 4000 miles
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Eric
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