Right folks

[shocx]

....Nearer comes the date I can ride my CBR600, but I still need to go about restrictors, I have asked at work (as I know the washer sizes) but they dont think they have a punch 42mm to create one.

Fortunatly though, a bike only has to have a maximum output of 33BHP in which theres no law as to how it is restricted, so if anyone has any idea's or home made recipies as to how I can restrict it.

Personally i was thinking about limiting the throttle, crack her on a rolling rode and adjust the throttle cable until I can only get to 33BHP of power, but obviously this would effect performance in all gears.

I was also reading up on a thread (on another forum) in which a guy had an idea about a button that you could switch on/off a rev limiter, which sounded cool since it means at the flick of a button, you can be unrestricted (for the track days i'll be going to obviously )

Anyone any idea on how I could go about the latter? or any other idea's/help are welcome.

[maverick]

what about a hacksaw and a file should not take long to shape 3 circles, 13mm drill for restrictor hole, dont forget restrictor hole goes to the bottom.

[shocx]

I cant imagine it being easy to get perfect circles though :S

[JP]

Would be a bit dodgy doing it your self. As when it's done properly it's tested and guaranteed at 33bhp they also register it to the dvla as bieng restricted. So you won't get pulled when it gets scanned. With no proof of your bike bieng restricted it would mean you'd get pulled over a lot. The switch you talk about will not be legal either coz there would be no way to prove if you were riding restricted or not if you had an accident. I'd think about getting it done legit so you have the documents then you can still take them out for your "track days" lol

[shocx]

If I goto a garage its £200, and that should be illegal in my opinion for 4 washers.
I know the switch would be illegal thats why it would be hidden
And restrictions aren't registered with the DVLA, there registered with the place that makes the restrictors (cant remember the name) which doesnt actually prove anything. I know the bike would be 33BHP as I know the correct washer sizes for my bike (42 washer with 13 hole)

In the eyes of the law, a certificate counts for nothing.

[JP]

Yer but your bike comes up as unrestricted and they do get sent away coz I have got them in. If the switch was hidden they'd just take it that your bike wasn't restricted and take it for inspection and then it would me about half an hour before they realised you had a switch and your insurance would be void. There not going belive you did it yourself

[shocx]

Like I said, £200 and im not paying that for a set of washers and a certificate I can get for £40

[JP]

Police won't belive a certificate like you siad it means nothing, any one can get a 33 bhp rolloing road print out if you know some one at a garage.

[maverick]

Main problem i can see with all this is if you have an accident and the bike has a cert to say its restricted, insurance company is well within there rights to confirm its fitted and probably would. Once they find out its not restricted your insurance would be null and void, which may be fine for you as you decided on the risk, but what if you hit somebody else who is going to fix that and who will get the bill. On top of that you will likely get fine and bike taken away for riding with no insurance, so maybe £200 pounds isn't to bad after all.

[shocx]

The subjects changing here, im not arsed about police pulling me over for not having restriction, im talking about getting it restricted, they could take me to court for all I care, it'l be restricted and they cant do nothing since it will be restricted.

[maverick]

If you know some body with a lathe or is there a machine shop at corus, they should be able to make you a set no problem.

[shocx]

May 13, 2009 18:22:47 GMT maverick said:

If you know some body with a lathe or is there a machine shop at corus, they should be able to make you a set no problem.

Cheers for that maverick, I never thought about using a Lathe tbh, slipped my mind aha, thanks

Also, do you know WHY the hole needs to be near the bottom of the washer?

[maverick]

No i was just looking at some on a forum after you mentioned them and they said hole fitted to the bottom, although FZR restiricters have the hole through the centre so maybe it dont matter.

[shocx]

Well on the picture I have of them, the hole is at the bottom, but I dont see why it would make any difference at all tbh.

[JP]

it's something to do with flow petrol would settle round the rim otherwise. It improves response and consumption. Not all have them tho. Mine are in the cente. As long as the whole is the correct size it makes no difference. It makes the bike run Shite any way far too rich and drowns the spark under hard acceleration. Makes it flat as too. Bott end power stays ruffely the same because fuel to air is enough to fit through washer but top end there is no power becuase the mixture is all wrong.

[shocx]

Well my restrictors are s'pose to restrict the air flow, and then im s'pose to fiddle about with the fuel mixture till its not running rich so its pretty much how it would be normally but with less power.

[JP]

Yours go before or after the carbs mine go after. I was Ment to fiddle to but no matter what me or the Honda bloke did we couldn't get it to run right. Got to remember your asking a big engine to work with a little engines fuel n air, it will never run properly. I got a shock at how underpowered mine was especially since I'd had a go before it was restricted, on closed roads obviously. Lol, I just don't like the thought of running the engine when it's not getting proper fuel n air in. Consumption is sooo crap too

[greenman]

.. Go to a dealer and buy a restrictor kit from them. It will cost you anywhere from £150 to £200. Thats for the kit, installation and a certificate that proves you are now at 33bhp. Every dealer I asked refused to let me fit it myself, which is BS in my opinion.

2.. Buy a restrictor kit from eBay for around £6.00 and fit it yourself. Its pretty easy to do. The kit comprises a set of washer type things with holes in. The holes are smaller than the carb air inlet and so they restrict the air input and so restrict the power output. You will have to fiddle with the petrol mixture screw to get it to run right though. Once you have done that you need a certificate from a Dyno tester. This will cost you around £45.

Don't let the dealer tell you that its illegal to do it yourself and that you need one of their certificates. A Dyno certificate is all thats required in the eyes of the law.

My CBR600 has been restricted to 33bhp for just over a year and I've had no problems with it at all. The plugs get a bit blacker than normal but a quick clean once a month

[greenman]

as having a bike with a lot of mods /you MUST comply with the insurance company certs must be signed by a bike shop to be legal /my nos kit has to as well ,i fit ,they check ,theysign documents to be legal. no way round .,do the docu,,come with the restrickers .if so you fit then get bike shop to sign/ even if its £40/60 would be about right .[ps will run rich and run a bit ragged ,