Scooter Exhaust Stud Set with Cap Nuts - 6mm or 8mm

Exhaust Stud Kit for Minarelli and GY6 Scooter Engines

This stud kit suits a range of scooters, including models fitted with Minarelli and GY6 engines. Each kit comes with double-ended studs and dome-top hex acorn nuts to hold the exhaust firmly in place. It is one of the exhaust pipes and silencers for scooters that help keep the exhaust system sealed. Pick the 6mm or 8mm size according to your engine type so the system keeps running as it should.

Parts Included and Build

You get two steel double-ended exhaust studs, each with a square section in the centre to make tightening easier with a wrench. The package also has two hex acorn nuts with a dome top, which fit the studs of a typical scooter exhaust. The studs measure 40.5mm overall, built to handle everyday use.

Choosing the Right Size

The kit is offered in two sizes: 6mm (M6x1.00) and 8mm (M8x1.25). The 6mm version works with 50cc and 90cc 2-stroke Minarelli engines, certain 4-stroke QMB139 engines, and stock 150cc GY6 engines. The 8mm version is intended for modified or performance GY6 engines and needs a thick metal exhaust gasket when fitted.

Specifications

• Material: Steel
• Size: 6mm (M6x1.00) or 8mm (M8x1.25)
• Overall Length: 40.5mm
• Includes: 2 studs + 2 cap nuts
• Fits: Exhaust studs for 50cc-150cc scooter engines: 6mm for stock 2-stroke, QMB139 and GY6, 8mm for modified GY6

Compatibility

Fits:

• 40QMB 50cc 2-stroke (Minarelli) (6mm)
• 50QMF 90cc/100cc 2-stroke (6mm)
• QMB139 50cc/49cc 4-stroke (6mm)
• GY6 QMI/QMJ 152/157 125cc/150cc 4-stroke stock engines (6mm)
• GY6 QMI/QMJ 152/157 150cc modified/performance engines (8mm, with thick metal exhaust gasket)

How to choose: Use the 6mm (M6x1.00) studs for a stock engine. Only choose the 8mm (M8x1.25) studs for a modified or performance 150cc GY6 engine, which requires a thick metal exhaust gasket.

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