This was taken off a race bike. Cylinder head porting refers to the process of modifying the intake and exhaust ports to improve their air flow and if you are building a superbike-spec engine then a good cylinder head is the place to start. The ports have been contoured, re-shaped and polished for good flow across the valve lift and rpm spectrum. I was informed that the head came from a MiniTwin / Twins Cup “Superbike” (some people call them FZ-07R or MTR-07) so an actual race bike! The item “Yamaha XSR700 MT-07- Ported And Polished Modified Cylinder Head MiniTwin Race” is in sale since Monday, June 28, 2021. This item is in the category “Vehicle Parts & Accessories\Motorcycle Parts\Engines & Engine Parts\Cylinder Heads & Valve Covers”. The seller is “vincent_from_london” and is located in London. This item can be shipped worldwide.
- Brand: Yamaha
- Type: Cylinder Head
- Modification Description: Ported and Polished head cylinder assembly
- Manufacturer Part Number: 1WS-11101-09
- Modified Item: Yes
- Reference OE/OEM Number: 1WS-11101-09