batman wrote on 11/25/18 at 08:38:30:Lancer, I was speaking to Dave's comment that his bike seemed to be struggling as it approached 6500 rpm/max speed, and my comments were addressed to that end ONLY.
I was a bit afraid of posting my feelings about my power profile of my engine.......I don't remember saying it was "struggling". It runs far better than a stock engine at all rpms.
The little 250 Ninja runs smoothly below 8,000 rpm - then it just screams from there up to 14,000.....it pulls strongly in the upper rpms. My Savage does just the opposite - it pulls really strong in the lower and mid rpms, then when you get up over 5,500 rpm it just loses a bit of "enthusiasm", and it lets you know that it is definitely time to shift to move the engine back into the 4,000 - 5,500 rpms where it pulls harder. It can rev past 6,500 rpm easily in the first 3 gears when under full throttle and you have to be ready to shift as it goes through the gears quickly - it just doesn't pull all as hard when you approach the upper limit of the rpm range. The bike reaches 80 mph easily, 90 comes with a bit more work....100 takes a good while and there really isn't much left. It could be that the exhaust system is holding the breathing back a bit....not sure. The engine runs really well for the style of riding I do, which is 40-60 mph twisty roads - the torquey engine is well suited to pushing the bike along at a very comfortable pace....I am not one that uses full throttle very often, and I very rarely explore the terminal velocity.
That said, I fully support exploring the potential of the engine, and I believe some work in finding the "actual" compression ratio of the Wiseco is necessary (Is it really 10.5:1 when installed in the Savage)? It could be that it is not necessary to run Premium if the compression ratio is only 9.5/1.