Aluminum Grand Prix exhaust pipe

Published at : 23 Dec 2025

DIY aluminum GP two-stroke exhaust pipe (expansion chamber) for scooter Honda Dio 120cc

Timestamps:
00:00 Intro
00:02 Project overview
00:19 Exhaust dimensions (GP manual)
00:39 Exhaust flange fabrication
02:36 Cylinder port correction
03:54 Expansion chamber design (Cone Layout)
05:02 Paper mockup
06:08 Transferring templates to aluminum
06:25 Cutting and forming the cones
14:04 Test fitting on the engine
14:41 Mounting bracket fabrication
17:24 Final welding process
17:41 Making the carbon fiber muffler sleeve
25:15 Aluminum end caps fabrication
28:12 Muffler assembly: Welding the flange
28:41 Perforating the inner core pipe
29:48 Muffler packing and final assembly
31:17 Polishing with Scotch-Brite
31:25 Final showcase: Finished exhaust
31:28 Engine start and sound test

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#hondadio #2stroke #expansionchamber #customexhaust #scootertuning #diy #grandprix