chancer
ɔ ɥ ɐ u ɔ ǝ ɹ
Or yes its a jack shaft and may easily swap to gears for adjusting the ratio to "slow down the Kart" ( Im not even gonna go there as far as high or low) haha That would be Crazy.
Price depends on where you're at. It could be worth 20000000 vietnamese dong...
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Post pics of the 2 tubes you are talking about. You can also put an inline fuel filter between the two and carb. This will catch any debris from the tank