Join Date: 04-16-2019
Location: Worcester, England
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 262 Post(s)
Reputation Power: 7
Re: 954 big bore kit
Hi, I am not a scientist, but doesn't a larger bore DECREASE the compression ratio?
My reasoning is this: There is a greater cylinder volume, but still the same amount of air/fuel flowing into the chamber. Using the same domed pistons and same size valves means that you now have the same volume of air/fuel being compressed in a larger space. That, to me, gives the effect of 'diluting' the mixture with the consequent LOSS of compression.
2001 CBR9290RR; 2003 CBR954RR; 2018 CBR1000RR SP2; 2020 CBR1000RR-R SP on order;
2002 VTR1000 SP-2; 1985 VF1000R; 1985 NS400R; 2018 C125 Super Cub;
2007 MV F4 1000R;
2020 Triumph Daytona Moto 2 Limited Edition