64mm Big Bore and Carb Kit YX/GPX/Zongchen 150/155/160cc TBW9041 52mm Part Number

Part Number

This is what really sets our kit apart from the competition especially considering the price

Part Number: TBW0991

Old Part Number TBW0508

With these oversized valves you get the best of everything as the stainless material will long out live the stock valves

64mm Big Bore and Carb Kit YX/GPX/Zongchen 150/155/160cc TBW9041 52mm Part Number***AUTHORIZED TB PARTS DISTRIBUTOR!!!***We've stood behind these products 100% since we opened in 2005. Best reviews received for a big bore kit hands down! Trail Bikes 170cc, 177cc, or 184cc Big Bore and Carb Performance Kit for YX GPX Zongchen 150cc 155cc 160cc Engines Part Number: TBW9041 Description: All aluminum ceramic plated 64mm cylinder with skirt NEW We increased the skirt height and size on the lightweight high compression 64mm piston with