need to de-restrict sv650 k3

[matt d]

I have just bought an sv650 and it is restricted, anyone know how to de-restrict it. feels like a mechanical stop somewhere on the throttle linkage, I only have an 1/8 turn on the throttle.

[Couerdelion]

It's done via the ecu on the newer models or with washers in the classic shape.

[Flamin_Squirrel]

Are you sure it's mechanicaly restricted?

K3 SVs and onwards tend to be restricted electronicaly - de-restrict by changing the ECU. If this is how it's restricted, you should have gotten it with the bike.

[matt d]

Cheers

I am assuming its mechanical but it's strange that the throttle on mine only turns a little way and you can hear a clonk at the linkage making me think it is mechanical
I take it I can just purchase an ECU from a suzuki dealer?? Do you know how much they are likely to be??

[Couerdelion]

If the bike was bought de-restricted it should have been supplied with the original ecu too.

If not they come up on ebay quite often, IIRC one failed to sell earlier today for about £25.

[Jp]

Cheers

I am assuming its mechanical but it's strange that the throttle on mine only turns a little way and you can hear a clonk at the linkage making me think it is mechanical
I take it I can just purchase an ECU from a suzuki dealer?? Do you know how much they are likely to be??

Well a restrcited bike wont have anything to do with the way the throttle works, just at how much Fuel/Air mixture is supplied to the engine.

My restrcited SV tends to stop pulling alot earlier than unrestricted.

Maybe your problem is bieng caused by something else?

[markfc]

an unrestricted ecu is about £350 according to my dealer.

[Kate]

I am assuming its mechanical but it's strange that the throttle on mine only turns a little way and you can hear a clonk at the linkage making me think it is mechanical
That really doesn't sound like its been restricted, K3s are restricted by swopping in a ECU that reduces the amount of power but doesn't do anything to the throttle?

How do you know its restricted? It sounds kinda worrying to me :?

[dclifford]

Don't believe everything you are told they are only telling you part of the story. K3 upwards can be resticted by mechanical means. I know because mine was.
It is easy to remove the mechanical restiction(assumbing that you know how to lift up the tank and remove the airbox).
There are 2 large washers between the top of the carbs and bottom of the airbox. There is also a stop in place on the throttle body, it stops the throttle from opening fully. This is to stop the bike from running too rich while the washers are in place. It is easy to remove once you have located it.
Any questions just ask.

[thor]

I thought K3 upwards were fuel injected rather than carbed?

[dclifford]

They are, but you still need the carb body.