To answer your compression question: form Wikipedia
"A high compression ratio is desirable because it allows an engine to extract more mechanical energy from a given mass of air-fuel mixture due to its higher thermal efficiency"
As you increase the compression of the engine you also increase the forces inside the engine (think about the dragster that blows up during a 1/4 mile run), there by making a higher compression motor less reliable or total engine life would be less...These numbers are not excessive or high (9 to 10:1)...if you start talking about 11 to 12 to 1 your are building maybe a 20,000 mile motor
Just got reminded by the post below...as your compression goes up you need to run a higher octane gas
When building a motor you want all the parts to work together so Talk to both TPUSA and B/C...I know that B/C has a "shop" but I don't know if they would on other bikes or just build test bikes....
One more think about the FCR carb...it is a very good carb but doesn't have a choke (fast idle)...you have to give the throttle a couple of turns and start the bike and keep the idle up it is warms up....for me this would not be a option because I don't want to idle the bike on my street at 6:00 AM when I go work...Right now I pull the choke start the bike and idle/low speed to the main street...keeps the neighbors happy.
Last edited by SDKimo; 11/05/2011 1:17 PM.
