[Components] ●Cylinder Head x 1 ●IN side valve x 2 (pre-assembled) ●EX side valve x 2 (pre-assembled) ●Japanese instruction manual x 1
*Head temperature sensor hole is M10X1.25 specification. *If you do not use it, you need to cover the hole with a bolt. *Please make sure to check the squish clearance and valve recess size before installation. *This is not a full kit and any complaint is not accepted after installation. *There is no specific cylinder kit available, so please use the cylinder kit of your choice. *This product is a high-end tuning parts. *Please make sure to have an experienced mechanic do the assembly. *Camshafts and rocker arms are not included.
■The SOHC Big Valve Head KIT is released by KOSO! ■Perfectly fits the popular KOSO Φ58.5 big bore kit! ■It is recommended for those who are not satisfied with the stock head.
■The target piston size is Φ58.5 or Φ59 ■Valve size is IN: Φ21, EX: Φ19. ■Stock air cooling fan covers can be used. ■Stock camshaft can be installed. ■For those who need more power, please use Pro Camshaft togther.
Points of Attention
* If there may be an instruction manual included, it will be written in Japanese.
I bought it with a new one, but the Valve seat on the Intake side had a bad rubbing contact with Valve After all, I cut the Seat again to the processing shop and used it after rubbing together the Valve I don't know if it's a defective ROD or individual defect, but this product was defective
The performance is decent and I am happy with it I'm currently using the port with a bit of work on it
The intake manifold is oval, so you need a mani for the ovalView Detail
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