Mushroom Head Tappet Adjusters - Choose Make / Model / Year

  • Sale
  • Regular price $ 39.95
  • 6 available

Have you took apart your top-end and noticed the ends of your valve tips have wear marks from the tappet adjusters? Although that is normal wear from usage the factory could have designed some better tappet adjusters.

The problem

The problem with the old style tappet adjusters is the design of the head. The head is flat and square. It does not contour the valve very well which "digs" into the valve stem and over time causing your valve stem to wear prematurely.

To fix this problem you have to replace the valve or resurface the stem. Both take time and money. Or you could install a set of new mushroom tappet adjusters that save time, money and your valve stems will last up to 5X longer.

The fix - why mushroom tappet adjusters?

All mushroom tappet adjusters feature a round head to help prevent premature valve tip wear. The round head allows smooth and even pressure when opening and closing the valve.

Our tappet adjusters are made exclusively for CBS right here in the USA. All adjusters have been properly heat treated to ensure longevity. The ends have a slot / allen key for easier and more accurate adjusting - nuts not included.


  • hardened finish
  • mushroom shape head
  • original length
  • original thread pitch


Our mushroom style tappet adjusters are sold in sets of (4) or (6) depending on your model / year. We stock tappet adjuster sets for all Triumph 350, 500, 650 and 750 twins (Daytona, T100R, T90, T120, Bonneville, T140, etc). BSA A50 and A65 (Lightning, Thunderbolt, Royal Star, etc). Norton Commando models as well as Triumph / BSA triples (A75, T150, etc).
Use the drop down menu to select which tappet adjuster you desire for your year, make and model

  • Made in the USA
  • Replaces part numbers 67-0056, 67-56, 70-3223, E3223, 70-1513, E1513, 68-0155, 70-8783, E8783, 067546, 06-7546, NMT2074, 71-3358 and E13358
  • Free shipping in the USA