Head. E22 style. 20/23 Big valve with tuning options

Head. E22 style. 20/23 Big valve with tuning options
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£89.99 £74.99 ExVAT

Product Code: 0729

This head has the same valve sizes and dome as an E22 head

2 Options now for different bore sizes, we have 47mm 70cc & 90cc or 52.4mm 110cc

Whats included:

  • Cast head unpainted
  • Standard cam 5.63mm lift
  • Cam sprocket 28 teeth
  • Cam bearings (2 bearings)
  • Cam sprocket bolts (3 bolts)
  • Inlet valve 23mm
  • Exhaust valve 20mm
  • Valve guides (2 guides)
  • Valve seals (2 seals)
  • Collets (4 collets)
  • Valve spring (dual type) (2 springs)
  • Top cap (retains collects) (2 caps)
  • Rockers (2 rockers)
  • Rocker shafts (2 shafts)
  • 6mm Exhaust studs (2 studs)


This head is all assembled and ready to fit with the valve gaps not set as we reccomend you check the gaps after installation.

This works well with 47mm to 52mm diameter cylinders. Ideal for C90 conversions upgrading the existing head to include a bearing type camshaft for better performance, tuning and less drag.

Technical data:
Exhaust gap:    0.12mm
Inlet gap:          0.10mm
Head torque:     10ft/lbs

Recheck the head torque when the engine has cooled down from its first run.
Check gaps every 350-500 miles or every 5-7 hours of use.



Product Code 0729
Condition New
Weight 2Kg