I can't Bigbird...well not legally anyhoo. If i have a crash and the insurance company checks to see that a restrictor kit is fitted, and its not there then I'm in deep doodoo. It would be interesting to see how it rides without it and if the kit is my prob??

My honda shop could probably do the third option...what would that do??

I would imagine the first thing i should do is call them and ask if that is something that they would have done, once the restrictor was fitted. If it hasn't been done i should insist it is done and take the bike down. If it has been done, I'm still going to take it in, and get them to re-look at the install.

Anything else..??

The throttle restrictor doesnt restrict my performance really. I was driving yesterday at 87mph. The Lower and mid performance arn't affected i don't think. As far as i'm aware the restictor kit just doesn't allow me to go flat out. I road a 125cc s wing before this...believe me theres no comparison..

which is making me think maybe the restrictor is something that just stops me using all of the throttle cable...instead of conected to the engine in some way, like edbancro mentioned...

Mmm
When i thought that some sort of maintenance hadn't been done related to the restrictor kit...i was sort of please as i knew it was just a case of rectifying it. Now it could turn out that its simply a screw stoping my throttle cable extending all the way. (An expensive screw at £170) in which case its something else causing this surging....

thanks to everybody for their help and advice. Once i find out what the problem is i'll post it here just in case it happens again..ride safe

So the bike went into Honda today, and after two techs took her out for a ride they both reckon that theres nothing wrong with her (read: Its all in my head ) The salesman who sold her to me is going to give me a third opinion when he takes it out for a spin tomorrow, before i pick it up in the morning. So what do I do?? Do i conceed that the bike has a few niggles and just get on with it or do I sell her, (probably losing £500-£1000 even though i've not done 100 miles on her yet)....

I quoted the general instructions from the website you linked to:

"With more and more bikes being produced with fuel injection systems this type of restriction is becoming more popular. The basics of the kit are that a device is attached to the side of the injection bodies which stops the throttle cam from opening fully. This is normally combined with restriction blades that go into the air box or sometimes the inlet manifolds. Generally each of these kits has specific fitting instructions that are delivered with the kit."

The part that bothers me is that they normally combine a restriction blade in the airbox or intake manifold along with the throttle cam stop.

Restricting airflow during normal throttle operation will have an adverse effect on the fuel injection. Less air means less fuel will be delivered. This could send the FI into a lean mode causing surging. I'm no engineer, but it seems that if you want to limit HP, you simply limit throttle travel with the cam stops. I don't know why they would tinker with airflow. Airflow is dependent on throttle opening. If you limit the throttle opening, you're already limiting airflow. Why not try removing the blades in the airbox or intake manifold, while leaving the throttle limiter in place? Maybe discuss this with your tech?

hey BigBird
I've been assured that the restriction is simply a throttle stop, theres no connection to the engine in anyway...so i've been told.

Can i ask u something..

Next time ur out on your bike can u tell me wot u feel when ur holding say 30 mph on a straight. Any jerkyness, jiggles? or just very smooth. maybe its just me. The tech told me because its a CVT bike and not a traditional geared bike i'm bound to feel slight variations. Thanks again for all your help.

Mine is smooth at those speeds as long as the road is just as smooth. If there are any ripples or bumps, then it will appear to surge because I cannot hold the touchy throttle steady enough under those circumstances.

Mine, too; at 30KPH over the cobbles in Bruges it's impossible to operate the throttle smoothly.

I have 49k on my 2004 swing. I did have surging as you at the same speeds. I did two things at the same time. I put in stp gas treatment ( fuel injection cleaner ) and i went to a middle octane gas. The surging went away and I'm back to regular gas now. Its cheap and easy to try, let me know if it helps.
Paul