shrekonwheels said:
IMO I do not get the detuning bullshit, and I struggle to understand how someone messing around in a garage can somehow magically get 12 hp more with a mere "jumper mod" yet Yami Engineers need to spend tens of thousands more on redesigning the motor for a couple more HP.
Really :question:
Many of us have the dyno graphs to prove it.
The CJM mod you mention does add about 12BHP - but not to peak, but around 4,000rpm where the earlier bikes are restricted (Although it does nasty stuff to the time so a Flash is a better way)
An Arrow full system and a good flash / re-map will easily add 12 BHP to the bike, and give it a huge boost at the top end so it does not feel breathless towards the redline, as to why Yamaha don't do this with their millions of R&D budget is obvious to a fool....
...Emissions regulations, do you not think if they could fit a straight through set of header pipes with no Cats they would not do so :question:
Your looking at a saving of about 3kg, and a bulk purchase reduction of I would guess 80% - 90% without the cats and all the precious metals that entails.
To a lesser extent a lighter silencer would also save some cash, metal costs money - making a heavy bike is expensive, people think making a light bike costs money, but in reality making a bike very light does, having a load of extra metal (including precious metals) to get though various rules is not cheap - and the R&D cost to pass these tests AND keep the bike at an acceptable cost is huge.
After bunging up the downpipe and tailpipe they still need to do more for these rules.....
And in comes the dreaded O2 sensors and piss weak closed loop fueling, with a load of sensors and electronics needing to be programmed to keep the bike unhealthily lean whilst avoiding total engine meltdown in a bid to comply with all the latest rules.....
This probably burns a load of budget as well.
May even be after all that the early bikes still did not comply and the low gear throttle restrictions were needed on top of everything else, cannot be sure, but I do not see why Yamaha, purveyors of the R1 would otherwise decide a 110BHP bike weighing over 250kg may be a bit scary without such restrictions :
And back to the Garage tuners, well really it tends to be flash vendors and tuners as well as owners who swap exhausts, flash the bikes and fit power commanders.
I am about to go to CJS Racing to get my bike custom flashed on the Dyno, I have Arrow headers which added 6BHP with no other mods, and an ECU-U flash, but the fueling is not perfect and CJS will disable the O2 sensors and aim for the optimal A/F ration across all throttle opening / rev combinations - something I am sure Yamaha could easily do as well, but only if they intended to sell the bike for off-road use on private land only, which I would assume may limit the sales potential.
I am already over 10BHP up on stock, and hope expect to find another couple of BHP through having my bike optimised, the fuelling will be perfected to my bike and the mods, but even a stock bikes vary, all the slight differences in manufacturing tolerances on the hundreds of engine parts mean no two bikes are identical, and even each cylinder will be slightly different on the same bike - so mine will have each cylinder individually mapped, which according to CJS can make a big difference on some models.
I am sure Yamaha could also map each bike as it came off the production line, if they invested in a hundred or so Dyno's and paid operators to spend several hours with each bike before it left the factory, not so sure most owners would want to bear this additional cost - and as the bike still needs to comply with the regs it would still be nowhere near as good as a decent tuner could get it in his small workshop.
Yamaha have to put the R&D into making a decent bike that complies with differing regulations all over the world and can still be manufactured at a price people can afford. The current S10 engine is unlikely to get much more powerful, there may be another 5-6 BHP that can be had within the confines Yamaha have to work, but to go after the KTM's it would have to be a new engine from the ground up that revs far higher, in effect this would entirely change the character of the bike.....
I think those who reckon the bike will stay fairly unchanged for a few years are right, and at some point perhaps they will build an entirely new S10, but it would be as different to the current one as the latest Fireblade is to the original model.