Jim - blat up the A3 to Steve Jordans (near to Boxhill) - that is what I did

Curium - I don't know what it does technically, however my SV1000 doesn't have any noticable flatspots at all - it pulls like Brad Pitt at a Hen night all the way through the rev range (I have not had it dyno'd though so it would be interesting to see what a dyno chart for it looks like)

I've just emailed Steve Jordan motorcycles, hopfully with any luck my little technical glitch will be sorted out! Thanks for all your help chaps, keep it comming if you have anything else to say. :D

Mapping and setting up the standard ECU costs £120. You will get the comparison runs on
a print out and an explanation of what has been done. We also have the
Suzuki diagnostics software just in case there are any running faults
with the bike.

Thats according to Steve Jordan motorcycles. Seems like a good deal to me, what do you lot reckon?

The fuel injection system on the SV (and pretty much all bikes) is very crude compared to that on cars. There is no air flow sensor or oxygen sensor so it can not adjust for changes in air density, or optimise itself for best cruising economy. There is a good chance that the standard European mapping is set to make sure the bike doesn't self destruct (run too lean) on the coldest, most humid day in the part of Europe that is the most below sea level! So for every other situation it is running too rich, and this is especially true in that 4500 - 7000 rpm range.

Keep in mind that a custom map for the standard ECU, or a Power Commander custom map will only be optimised for the atmospheric conditions when you get it done! The better it is optimised, the worse it will be when the weather is different.

If you get a Power Commander and don't mind fiddling with the mapping and getting dyno runs (that show fuelling) a few times, then you can really get the best power/smoothness out of the bike all year round.

If you get the standard ECU re-mapped, be aware that it will not be perfect for all year round.

It will be pretty much very stable - as neither does the PC self adjust and just plonking in a map without a dyno is just plain silly so you will also have to adjust the PC the same. I run all our race bikes with this setup and so far it has only needed one small change between the start of the year and end of season, a BSB team has also been trialling this software and found it to be perfectly adequate for a highly tuned motor - obviously without the cost of buying what is basically a unit that allows you to feed a map into the ECU!.

With a power commander Steve's GSXR made 6bhp less with a custom map showing the same fueling curve...and that wasnt a one off - mainly caused my the PC's own electronics causing a resonance at high RPM causing the bike to loose potential power.

Trouble is until now there have only been two options unless your going for a full race setup such as a Motec. A power commander or a Yoshi/teka set up. NOW there are other options..including the direct to ecu multi position mapping (for suzuki only at present) and a new unit being developed by Dynapro...soon enough Power commander will have a tough market to deal with and will have to up their game when it comes to quality and reliability of their units.

so it would seem, re-mapping your standard ecu could be the way forward...?

Yes and within the next few years as bikes are getting more advanced then it should become common place that possibly bikes have a system on them that allows this to be done as "common place" although running your bike on a dyno would still be required at the time of mapping to ensure correct fueling unless the bike has its own sensors to record data. This is something that i know is being developed so the bike can self map to infinate parameters whilst being used.

SV650Racer, resonance of what exactly? The PC certainly hasn't caused any drop in power on my SV, as was very obvious on the Lydden track day.

I agree that it won't take long for bikes to catch up with cars a bit on the FI stakes. Ironically this will probably be caused by the necessity to comply with stricter emissions standards.

It doesnt cause a "loss" of power only that it stops the bike producing as much as it could at top end - high RPM. Back to back development without the PC the bikes have consistantly made more - than they did with a PC showing the same fueling curve.

The bike will alter slightly anyway due to air pressure and temp sensors from richer to leaner within a small range which is more than enough for the bike to run within the mapping parameters set

You dont go changing your carbed bikes jets every few months to take into account changes in weather unless your racing = even then one setting is often enough for the SV if done right :wink: