SK5 - Query re top speed and restriction

Originally Posted by G

If your a new inexperienced rider anything will feel rediculously fast... Even if you have lots of experience in fast cars.

If stu has seen the bike/ecu and knows the factual difference in ecu's... And says yours is a restricted ecu... Then really it must be. Regardless of how fast yours feels.

Nobody has seen the bike or it's ECU, I just queried it as I was finding that the bike seemed to be running out of steam at over 100 mph. It has got up to 110 and I think 115 once, but I have not gone any faster. But I have not TRIED to go any faster, thats the point.

I can't get my head round this, nor do I really think it is 33bhp. It only had one owner from new which was a chap who kept it in immaculate condition and serviced it himself etc. Why would he restrict it?

Like I say, it is as quick as any other bike and with the aftermarket can it is one of the louder bikes out there. I am going to take it back to the dealer to get a definitive answer, but as I say, it's can't be due to the way it rides.

If anyone wants to take it out for a ride to give me their opinion feel free, I live on Pirbright bends

Is there a definitive test I can do which will give the answer? Can I post a video up of me taking off on the bike? What will solve the riddle?

Definitive way is to see if you have decent pulling power between 7k and 9k rpm. If its restricted the revs take longer to get there as at about 6k the rate of rev increase slows, where as full power lets it rev more freely.

Try and get to 10k rpm in 2nd or 3rd. If you can it is not restricted.

The only real way of finding out is to pin the throttle and see what speed you get. ~115 is restricted territory, 120+ is unrestricted. Up to 70mph there's not really any noticeable difference between the 2.

Or do TazDaz's way.

Originally Posted by barwel1992

some one know where to get the 33bhp ecu part number ?

32920-17G10 - printed on the ECU.

Whip the seat off, and have a squint - it will be fairly obvious.

Originally Posted by simesb

32920-17G10 - printed on the ECU.

Whip the seat off, and have a squint - it will be fairly obvious.

It changes from year to year I think. My restricted ECU has a difference part number to that one.

[yorkie_chris]

Changed in K7 along with twin plug head.

Something that has had me wondering is the difference between the restricted and unrestricted ECUs and how Suzuki restricts the SV.
At a glance restriction via the secondary throttle (SDTV?) map might seem the logical choice, but perhaps that would be too easy.

Has anyone with a restricted bike messed with this? ie disabling SDTV.

Could the guy that owned it before have changed the sprocket, that would make it quick away from the lights but slightly lower top end.

Originally Posted by simesb

32920-17G10 - printed on the ECU.

Whip the seat off, and have a squint - it will be fairly obvious.

ok not much on the ecu, and nothing that looks like those numbers so i can be prety sure thats its a unrestricted ecu but can only get 115mph out of it with that in on my run way

hmm will try again when i get my new air filter

ok was on royners and the fiche shows the modle number for my bike but cant find it on the ecu at all :/