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bruce71198 · April 5th, 2013, 12:03 PM

Here are some rumors that I have heard;
1st year ( 88 I think ) had the most cam duration.
Pre gens have bigger exhaust valves and ports.
Pre gens require some bolt hole mod to fit in new gen bike.
I know about the tensioner issue, but is that correctable with a mechanical
One ?
Also, can you go 4mm over on the cylinder block without boring the case ?

April 5th, 2013, 12:03 PM	#119
bruce71198 ninjette.org sage Name: bruce Location: northern illinois Join Date: Jan 2012 Motorcycle(s): Race bikes:08 Ninja 250,11 R6,16 ZX6,SV650.3 HD-1947,2-2003,2010. 1946 Indian and a lot of dirt bikes.2 Posts: 999	Here are some rumors that I have heard; 1st year ( 88 I think ) had the most cam duration. Pre gens have bigger exhaust valves and ports. Pre gens require some bolt hole mod to fit in new gen bike. I know about the tensioner issue, but is that correctable with a mechanical One ? Also, can you go 4mm over on the cylinder block without boring the case ?