So I was having a discussion with a fellow motorcycle racer and he stated that The bike I'm riding has too much horsepower for my skill level. I currently ride a 1000cc gsxr1000. He suggested I sell the bike and get a 600cc gsxr600. Well I love my liter bike and even though he's probably right about it being to much bike I don't want to get rid of it. I had the idea of de-tuning the engine to produce the same acceleration as a 600 cc bike. He stated that is not physically possible. I disagree with this. The bike has a mode selector switch that has 3 different fuel maps for the EFI system. It's a speed/density system so you can edit the ECU for any 1 of the 3 maps and control when and how much fuel is injected into the throttle bodies. There are also 2 sets of butterfly valves in each throttle body. The top one is connected directly to the throttle cable and the one below that is actuated via a servo controlled by the ECU. The original intent of the system is to offer 3 different HP curves to the rider for road riding, race, and riding in the rain. The gsxr600 hp curve: http://www.holeshot.com/dynocharts/images/dyno_2004_gsxr600.jpg [Broken] The The gsxr1000 hp curve: http://forums.13x.com/attachment.php?attachmentid=18299&d=1173117627 [Broken] gsxr 600 gear ratios: 600: Primary reduction ratio 1.974 (77/39) Final reduction ratio 2.687 (43/16) Gear ratios Low 2.785 (39/14) 2nd 2.052 (39/19) 3rd 1.714 (36/21) 4th 1.500 (36/24) 5th 1.347 (31/23) Top 1.208 (29/24) gsxr 1000 gear ratios: Primary Drive Gear Teeth (Ratio) 73/ 47 (1.553:1) Final Drive Sprocket Teeth (Ratio) 42/17 (2.470:1) Transmission Gear Teeth (Ratios) 6th 33/26 (1.269:1) 5th 34/25 (1.360:1) 4th 36/24 (1.500:1) 3rd 36/21 (1.714:1) 2nd 39/19 (2.052:1) 1st 41/16 (2.562:1) Transmission Overall Ratios 6th 4.879:1 5th 5.218:1 4th 5.755:1 3rd 6.578:1 2nd 7.876:1 1st 9.833:1 Now you can clearly see that the GSXR1000 has a totally different HP depending on what drive mode (fuel map) is selected. My question is this: What prevents one from attaining the same acceleration and throttle response to the rear tire as the gsxr600 on the gsxr1000 by editing the setting on the "low" fuel map? I realize it's not as simple as just matching the HP curves engine to engine because the 2 bikes have different RPM limits and gear ratios. I still don't see why editing the edu values for fuel and air intake can't compensate for that. Especially considering they can be edited for each gear and even each cylinder in each gear. His claim is that " it would be a crappy running bike with crap throttle response and crap acceleration and all. It won't be "like a 600" " and "If you had any clue about how fuel injection and internal combustion work, and how horsepower is calculated you'd see you're wasting your time" What do you guys think? Possible to make the 1000 perform the same as the 600 or no?