Cylinder Stage6 86 / 88cc Streetrace Cast Iron Minarelli AM6

Stage6 Cylinder Kit 86 / 88cc Streetrace Cast Iron Minarelli AM6, the popular cast iron tuning cylinder by Stage6. In addition to traditional scooter tuning, Stage6 is mostly know for their high-quality tuning parts for modern scooters with CVT but a while ago decided to branch out into making parts for mopeds with gearbox (Supermotard etc.). First they launched a 50cc line, now they added two kits with 77cc and 88cc, since we all know: There is no replacement for displacement!

The kit includes:

• 88cc grey cast iron cylinder, d=50mm, 5 transfer ports and simple exhaust (28mm)
• 2-ring piston, 50mm
• one-piece high-compression cylinder head, aluminium
• gaskets (head and base) and hardware

The cylinder performance is pretty impressive on all counts – take-off and acceleration are great and due to increased displacement top speed and the overall output are much improved. The cast iron cylinder is extremely reliable and durable, so it is definitely suitable for intensive use.

When it comes to tuning cylinders, you should adjust the entire setup; we recommend a 26mm carburetor, a racing exhaust and a tuning clutch (reinforced).

The 86cc / 88cc cylinder can be used with two types of crankshaft: 

1. crankshaft 44mm stroke / 85mm connecting rod without spacer => 86cc
2. crankshaft 45mm stroke / 90mm connecting rod with spacer => 88cc

Our tip for running in: the new cylinder should be run in for 300km, i.e. do not go to full throttle. We recommend a 3% two-stroke mixture (1:33) to ensure prolonged engine life.

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. Don't panic, it is a 88cc cylinder and may therefore be NOT STREET-LEGAL (in various countries).

Note: if you're running the cylinder with a 90mm conrod crankshaft, you'll have to use longer stud bolts (M7x120mm). And depending on year of manufacture, you may have to open up the crankcase a little to make room for the longer connecting rod.