TB Swingarm, Plus 1.5″ – Z50 K3-78 & Z50R 79-99 Swingarm keeping it shielded from dirt

keeping it shielded from dirt and mud

5mm Valve Stem

Now includes the port for the EFI sensor on the 2019+ models

Note:  This kit should be installed by a professional mechanic or shop that offers valve job service as the valve seats must be cut to accept the larger valve head diameters and valves sunk deeper to allow for overlap clearances

This kit is to upgrade the cylinder head on stock YX/GPX 150 or 160 engines to our new Race Head V2

TB Swingarm, Plus 1.5″ – Z50 K3-78 & Z50R 79-99 Swingarm keeping it shielded from dirtTB Swingarm, Plus 1. 5 Z50 K3 78 & Z50R 79 99 New in 2020: TBparts. com has an updated version of our popular Plus 1. 5 extended aluminum swingarm kit for the Z50 K3 78 and all Z50R models. The previous version was a great performing swingarm that we sold for the last 10 years. We decided it was time for an update and this new one is exceptional! Here are the new key features of this version: Uses solid billet aluminum sections for increased strength