Cylinder Stage6 70cc Streetrace cast iron Minarelli vertical (Yamaha BW's / Slider)

Stage6 Streetrace 70cc

Stage6 Cylinder Kit 70cc Streetrace 10mm piston pin cast iron Minarelli vertical (Yamaha BW's / Slider), powerful cast iron cylinder for everyday riding.

Performance Stage6 70cc cast iron cylinder

The Streetrace is a lower-priced version the popular Sport Pro aluminium cylinder. Reliable and powerful, this is the perfect cylinder kit for everyday use, with great torque and increased top speed for maximum riding pleasure.

Transfer port layout with 5 ports plus 1 simple exhaust port is basically identical to the more powerful 70cc Sport Pro kit, it was slightly modified to meet the thermal requirements of a cast iron cylinder. The cylinder comes with a high quality 2-ring piston and a HC cylinder head. Maintenance and adjustment are easy, and of course you will find all necessary spare parts in our shop.

Performance characteristics are similar to the Sport Pro - powerful take-offs and acceleration, with an engine speed of approx. 10,000 rpm, with up to 8 - 11 hp, which is 1 - 3 hp more than comparable cylinders. Of course, the cylinder can only unleash its full potential when combined with the matching components, you will find some recommendations below.

The cylinder looks unobtrusive and similar to the stock part. Stage6 has deliberately decided not to display the brand name on the cylinder, instead of a logo they stamped "49ccm" on it.

Contents and specifications stage6 streetrace 70:

• Cast iron cylinder 47 mm
• 2-ring piston, 10mm pin
• Aluminium cylinder head
• Gasket kit
• WITHOUT road approval
• Squish clearance is pre-set, a cylinder base gasket is included.
• Run in: about 300km (150km at ½ throttle and 150km at ¾ throttle).
• If you keep the oil pump, we recommend using Stage6 oil with optimized flow characteristics to avoid clogging of the pump.

Optimum setup for the Streetrace 70cc cylinder

Minimal configuration for everyday use

• Exhaust

• Spark plug BR9HS

• Reinforced small end bearing

• Carburetor 17,5 mm

• Carbon reed petals 0.30 mm

• Sport variator / CVT standard

• V-belt min. 16 mm wide

Maximum configuration for sport use

• Crankshaft

• Bearings

• Exhaust

• Spark plug BR9HS

• Offset woodruff key

• Carbon reed petals 0.30 mm

• Carburetor 19mm

• Air filter insert

• Sport variator / CVT standard

• Reinforced V-belt

• Clutch

• Secondary transmission 14-43