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Big Bore Kit Includes:
Cylinder Head Assy with 69mm Valves (Already Installed)
80cc 47mm Cylinder Block
80cc 47mm Piston Set (Piston,Piston Rings,Piston Pin,Piston Pin Clips)
Valve Oil Seals
Gasket Set (Head and Base Gaskets ,Tensioner Gasket ,Exhaust Gasket)
Studs Set (Intake Studs, Exhaust Studs,Exhaust Nut )
You will also get an extra BACKUP Kit include the gasket set and stud set.
Travtrav
2025-07-25 15:18:38
I travel really far to get to and from work and a regular 50cc does not keep up with traffic as good as you need it to I read on the Forum 49cc scoot in the FAQ section about Big Bore kids at the 47 mm piston is the best bang for your buck it gives you a significant power increase without reducing reliability the build quality was just as good if not better than what came with the scooter Factory installing the Big Bore Kit was easy I recommend watching a lot of YouTube videos and taking a lot of notes and making sure you have everything before you begin it arrived fast and it functions as specified the bike runs like brand new and has never left me stranded fit perfectly no modification needed
Ethan
2025-05-26 09:08:34
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Michael Lodes
2025-04-08 20:04:30
Installed properly, these are a great setup for someone trying to get a little extra out of their 50cc gy6. If you're trying to get something you can beat to hell spend money and get quality expensive parts.
Jamie Davis
2024-11-19 17:49:23
Works amazing my taotao thunder 49cc went from 37mph with a good tune to now with a tune for this kit I easily do 47 mph an iam sure if you tried could get more out of it. ALWAYS CHECK RING GAP !!
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