Rechambered Airsal puch, tomos moped cylinder head

Description

This item is a rechambered Airsal cylinder head featuring a better squish band and larger combustion chamber volume.
Stock head is the second image.
Stock combustion chamber is not very good if your Puch or Tomos moped is fast.
The stock combustion chamber volume is only 5.0cc, which makes it a detonation monster (not good).
To prevent detonation and the catastrophic engine damage that results, cylinder head temperature should not exceed 300 deg. F.
These rechambered heads have a chamber volume of about 6.0 cc's.
You will notice cooler running temps and more power compared to the stock Airsal head.
Takes 1/2" reach 14mm spark plug, like the NGK B8HS
Use additional spark plug shim if temperature sensor is not used.
This head will work on kitted motors with up to a 47mm piston diameter.
Tomos mopeds will require a little hacking of the top fins in order to prevent cylinder head from hitting frame.