UMA Racing Superhead Cylinder head Kit - Yamaha (25in/22ex)

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Once you hold the UMA superhead in your hands, you can see and feel that someone put a lot of thought and effort into engineering this cylinder head with the intake inlet ported to a unique "8" shape for optimum airflow. Built to only the highest standards, you will not need to think about porting or polishing this head further as all the work has already been done for you. Fits various Yamaha motorcycles underbones. This version comes with extra large valves specially to match 65mm UMA big bore cylinder block kit.

Included with this item are the valves, titanium retainers, springs, rocker arms already assembled. Also gaskets and a matching camshaft. Basically everything you need for assembly, good to go.

This cylinder head is plug and play for 06-13 Yamaha engines without the o2 sensor bung near exhaust port. For later models with o2 sensor bung, please check out other brands cylinder heads (Espada etc) or modify your exhaust piping to suit.



  • 25/IN 22/EX valves
  • Valve retainers, springs, rocker arms and camshaft
  • Large 30mm exhaust port
  • Intake snorkel for Jupiter MX/Crypton X/Spark/Exciter T135 underbones.
  • Head gasket
  • Mounting hardware and hose clips
  • *Special Intake snorkel sold separately for R15/Vixion Fz150i*





Yamaha LC135/Jupiter MX/Crypton X/Spark/Exciter/sniper/T135

Yamaha Y15ZR/Jupiter MX King/Crypton X/Spark/Exciter/Sniper T150

Yamaha Fz150i Vixion

Yamaha R15/YZF-R125/MT-15/MT-125/WR125


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