Are there any specific mods or tweaks that give a noticeable improvement in low RPM power?
I am sure my bike is like everyone else's and doesn't get on the band till about 6k RPM.
Are you sure you want the answer, because you can't build power without changes, and changes cost money
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Here it is in a nutshell... Low rpm power without changing the displacement is only going to be achieved by maximizing cylinder filling at lower rpms. This is primarily going to be done by changing cam timing, and reducing overlap. Also, the ports on out heads are actually to large for most efficient low end power production, so efforts have to be made to increase flow speed and prevent fuel from separating while in emulsion. Increasing mean effective cylinder pressure at lower rpms is THE only way you're going to make strides in moving the power to a lower, ore useable rpm area.
Basically what I just said in laymans terms is to get as much well mixed air and fuel into the cylinder as you can at low rpms, and then trap it there for a more powerful explosion.
There are "cheats" you can use, like advancing the ignition timing, but This does nothing to improve cylinder filling at any rpm. Everything in an engine works off a give and take scenario. IMO, based on my experiences, advancing the cam timing may somewhat sharpen the low rpm throttle response, but at the risk of over advance in the 3500 to 4000 rpm range, and at any time WOT is employed. Any time you have excessive advance you're going to make less power not more, so I personally don't employ advance as I haven't seen it actually do any good over the broad rpm range. JMO, Steve
