171cc bbk for gy6 mods

Snowmanhat · 07-02-2024, 06:21 PM

New here, installing a 171 cc big block kit in my tao tao GY6 150 cc scooter to get Better top speed. I geared up to 14/38 tooth but need more power to make use of those gears. What is the best carburetor mods and exhaust mods to support the 171 cc for average conditions. i’d like to keep the pipe as quiet as possible Thank you very much for your help.

ProDigit · 07-03-2024, 10:00 PM

Nothing. Most amazon and Aliexpress exhaust slip-ons are for 50-125cc bikes.
You put them on a 150cc, and the silencer might fly out.
You have to modify them.
I needed to manufacture a baffle connected to the silencer tip, to make my bike about as quiet as a BMW or Honda, but still hear the single cylinder 'bop-bop-bop' sound.

You'd basically need to find a way to mount a baffle inside your exhaust slip-on.

07-02-2024, 06:21 PM	#1
Snowmanhat Join Date: Jul 2024 Posts: 1	171cc bbk for gy6 mods New here, installing a 171 cc big block kit in my tao tao GY6 150 cc scooter to get Better top speed. I geared up to 14/38 tooth but need more power to make use of those gears. What is the best carburetor mods and exhaust mods to support the 171 cc for average conditions. i’d like to keep the pipe as quiet as possible Thank you very much for your help.
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07-03-2024, 10:00 PM	#2
ProDigit Join Date: Aug 2013 Posts: 183	Nothing. Most amazon and Aliexpress exhaust slip-ons are for 50-125cc bikes. You put them on a 150cc, and the silencer might fly out. You have to modify them. I needed to manufacture a baffle connected to the silencer tip, to make my bike about as quiet as a BMW or Honda, but still hear the single cylinder 'bop-bop-bop' sound. You'd basically need to find a way to mount a baffle inside your exhaust slip-on. __________________
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