R6 Engine Disassembly | Yamaha R6 Engine Rebuild Episode 2

[@alejandrotobienne8220]

This engine didn’t need a rebuild FYI MAYBE valve lash or new head gasket.

[@nicky.adihardjo]

Hi Alejandro, compression is now: Cilinder #1: 5,1 bar Cilinder #2: 7,5 bar Cilinder #3: 9,0 bar Cilinder #4: 9,0 bar Soo not enough.... This is with new piston rings and head gasket.... I will perform a leakdown test today to check where it is leaking....

[@nicky.adihardjo]

Okay just checked it with the leak down test. Cilinder 1 and 2 all have massive blow-by between the piston and cylinder…. The PCV lets a lot of air trough… The valves and all are good. So it needs a new cylinder or a fix up of the cylinder wall…