The larger diameter looks to be the air box drain (long story to explain why I now know this) Remove cap, hopefully you wont get the surprise I did. The thinner looks to be the drain hose for float bowl (bottom of carb) when you might drain your carbs when your riding season is over.
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Drew in Lake Forest, Illinannoying
Multiple motorcycle owner/restorer
Yamaha '86SRX600, '87SRX250, Honda '85VF1000R, Ducati '67 250.
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