revtothelimit - motorbike forum

dern wrote: Fri Sep 30, 2022 3:54 pm

Dodgy knees wrote: Fri Sep 30, 2022 3:47 pm Doesn't the big SD have engine modes. Whats it like in rain mode or whatever they call it. ?

Don't know, it drops it to 100bhp so never tried it.

A_morti wrote: Fri Sep 30, 2022 11:48 am
I think it's fuel cut at closed throttle that's causing the problem. Basically every time you're transitioning from closed to small throttle openings, you're bump starting a stalled bike, and that almost matches what it feels like.

I reckon a remap which gave it just a sniff if fuel at closed throttle would help a lot, but as far as I know you can't remap Hondas and I'm not throwing Power Commander money at a 25hp commuter bike.

Mr. Dazzle wrote: Fri Sep 30, 2022 11:50 am This won't be a problem on electric bikes. Smooth as a butter spread silk wrapped baby's bum.

Just sayin'.

dern wrote: Mon Oct 03, 2022 8:57 am

Mr. Dazzle wrote: Fri Sep 30, 2022 11:50 am This won't be a problem on electric bikes. Smooth as a butter spread silk wrapped baby's bum.

Just sayin'.

Nothing has put me off electric bikes as much as the YouTube channel Marc’s Travels. Really interesting videos about the practicalities of touring on electric bikes. Love the idea of electric power and would have one in a heartbeat except for the fact that keeping them charged looked like a massive faff and would spoil the randomness I like in a day out and also long distance stuff. Also the cost for something that will be outdated in next to no time and have no residual value next to what will presumably be the next generation of the things with more range.

Numnut wrote: Fri Sep 30, 2022 10:53 am

dern wrote: Fri Sep 30, 2022 10:02 am That's interesting as that uses the same photo and description as the racetorx spacers at twice the price... https://racetorx.co.uk/product/ktmsk/

That's pretty cheeky really then! That aside, a lot of people seemed to think they were well worth fitting, so hopefully it'll improve things.

Sideshow Pob wrote: Mon Oct 03, 2022 10:52 am I've found that a major contribution to the 'snatchy throttle', as mentioned earlier, is the deceleration fuel cut that most modern Euro 4 and 5 bikes will have programmed into their ECU. Nowadays, rather than having people wanting their bikes flashed to get more power and to correct the fueling for their new exhaust, I'm getting quite a lot of standard bikes in just to flash out the snatchy throttle. I give people the dyno sheet to show a few more bhps but they aren't really interested in that aspect. Normally, they pay the money and ride off and then return 10 minutes later to thank me for completely changing their bike and making it so much nicer to ride.

You could go with a postal flash (a bench flash as it's sometimes called) and just ask for the deceleration fuel cut to be removed, but to be honest, it's far better to have a custom map written to the ECU after a dyno session.

The main system in place that a majority of tuners use is Woolich but there are others too. Woolich covers most of the Jap bikes as well as BMW and Ducati and I also use ECU Studio to flash KTMs, MVs and the Street Triple 765RS.

Sideshow Pob wrote: Mon Oct 03, 2022 10:52 am Normally, they pay the money and ride off and then return 10 minutes later to thank me for completely changing their bike and making it so much nicer to ride.
...
You could go with a postal flash...

Mr. Dazzle wrote: Sun Oct 02, 2022 7:56 pm Mass is a big part of it yeah. Plus engines which tend to have much more inertia/bigger flywheels. Think how much more quickly bike engines respond to blips in neutral.

Plus most new cars are FBW throttle so the transition on/off pedal isn't all that simple any more. In fact if you drive new cars back to back with old ones you can really sense that.

EDIT: As I said on page 1 though, it genuinely is a problem in cars and you can really easily get into a feedback loop where the snatchyness of the throttle makes you foot wiggle, which makes you make snatchy throttle inputs and so on. The so called 'tip-in' calibration is a big part of making a car feel good, it's demonstrably something car OEMs get right far more often than bike ones. It's double (or probably squared!) hard on an EV 'cause the engine is capable of responding as fast as you can move you foot - faster even - 'cause it's all just microchips and EM fields. No pesky valves or pistons.