The S10 does have a slight bit of abruptness with its low-speed fueling - on initial throttle it may seem to lag a bit, so you give it more throttle, then it comes on a little too strongly. In T mode, everything is more muted, so it is less noticeable. There are various suggestions for fixes on this very forum, all the way from tweaking of the TB sync bleed screws, to adding a PCV, even having your ECU sent out to be reflashed. It's probably an artifact of what Yamaha had to do with the fueling and throttle maps to pass emissions.
The MCN test complained a bit about what I think is the same thing, saying that there was some variability in the response of the engine, sometimes seeming sluggish and other times not.
I don't think it is much of an issue and most bikes, even some carb'ed ones but especially the injected ones with "fly by wire" throttles, tend to have slight hiccups in their fueling like this. Honestly, I think we've become so accustomed to almost perfect fueling in current technology engines, even the slightest flaw stands out. It's not something I find a problem or even noticeable in everyday riding, but so far I've done almost no highly technical riding where I'm picking my way through tough terrain. Perhaps I'm too tolerant. In the unlikely event it did bother you, I would expect you could get it tuned out, although this might involve doing aftermarket mods at some expense.
Mostly, it's a damn fine-running engine. A little lumpy at times and with a bit of a gravelly texture - if you love multi-cyls and are not fond of twins, it might seem a little too agricultural - but it is a very friendly engine with good power across a very wide spread of engine speeds.
- Mark
The MCN test complained a bit about what I think is the same thing, saying that there was some variability in the response of the engine, sometimes seeming sluggish and other times not.
I don't think it is much of an issue and most bikes, even some carb'ed ones but especially the injected ones with "fly by wire" throttles, tend to have slight hiccups in their fueling like this. Honestly, I think we've become so accustomed to almost perfect fueling in current technology engines, even the slightest flaw stands out. It's not something I find a problem or even noticeable in everyday riding, but so far I've done almost no highly technical riding where I'm picking my way through tough terrain. Perhaps I'm too tolerant. In the unlikely event it did bother you, I would expect you could get it tuned out, although this might involve doing aftermarket mods at some expense.
Mostly, it's a damn fine-running engine. A little lumpy at times and with a bit of a gravelly texture - if you love multi-cyls and are not fond of twins, it might seem a little too agricultural - but it is a very friendly engine with good power across a very wide spread of engine speeds.
- Mark
