How to derestricted your big bike from 33bhp

[Noxious89123]

The original thread I made when I did this was shite, as it was mostly me rambling along and a bit of guess work. I have since successfully derestricted my bike, so it's about time i made a better, clearer post about the subject, as the qustion crops up quite often.

The basic's of it are that you need to remove the fuel tank and airbox of your bike, to get to the carbs. How you do this depends on your bike, so get a Haynes and figure that part out for yourself!

Once you do that, you should see something like this;
https://img393.imageshack.us/img393/564/restrictorsjc9.jpg
These are the slides in the carb. They are not restrictors (I thought they were too at first. D'oh).

https://img172.imageshack.us/img172/2674/1004843v2tp3.jpg
There will be a washer in between each carb and the cylinder head, inside the carb rubbers. You will need to undo the clamps holding the rubbers onto the head so you can lift the carbs up. I lifted the carbs and rubbers off the engine and then stuck the end of a 1/4" extension bar into the hole in each washer and gently levered them out of the carb rubbers. Easy peasy. It worked fine on my bike, but be careful not to damage or split the carb rubbers! (Getting the washer back in this way would be a real pain in the arse, so be sure before you do this.)

https://img512.imageshack.us/img512/1551/1004900za3.jpg
These are the "carb cap" part of the restriction that is mentioned on the FI International certificates.. They sit under the carbtops but ontop of the rubber diaphragm. They stop it (and thus the carb slide and needle) from lifting up / opening up fully.

I didn't know about these (Because there is bugger all information about derestriction on the internet!). I only found out when I had the bike service and the mechanic mentioned it and asked if I wanted the job doing properly. He took them out for £20 under the counter.

Be careful taking these out, because the diaphragms are very delicate and can tear. (Or so I was told. Didn't do this part myself, so couldn't say.)

Note: No doubt I'll have made some typo's in there somewhere, or something won't be quite explained clearly etc. If so, let me in here or by PM and i'll edit it!

Hope this helps!
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'06 Honda CBR125RW-6 ~ '00 Honda CBR600F-Y ~ '07 Honda CBR600RR-7 ~ Bikeless
'53 Ford Ka 1.3 ~ '03 Vauxhall Astra SRi 1.8 ~ '52 Vauxhall Astra SRi 2.2 ~ '53 Vauxhall Astra GSi

[m0l0t0v]

Also, to be aware, not all bikes have the rubber parts.

My Hornet didn't. It jsut had the washers in. And it was definately full power after that
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'99 Hornet 600 , VFR 400 NC30 '92 , Kasawamasaki GT 550 , '98 Hornet 600
**\Tarmacsurfer/** said: It's that immaculately manly coiffure of yours isn't it. One glimpse of your virile locks and the punters can't wait to buy whatever it is you suggest, as it might let them be just a little bit like the Adonis that is our very own Molly Doovydoo said: Its not my fault I can't get it up properly, I just wasn't blessed

[Purplepill]

Cheers for clearing that up for me I removed my own washers but was always curious as to what the 'carb caps' were, dont think my bike (CBR600F) had them but had heard of them being mentioned on other bikes.

Edit: Ah sh*t, it appears this IS a cbr600 although mine was a 95'....according to your origional de-restriction thread it uses a different engine? If the washers were out but the caps in, do you have any idea what power it would make roughly? I pinned it to just over 150 (on the speedo ) so im guessing it didnt have caps, but curious, if it could still make 80 odd bhp with the caps in I guess its possible?
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''He had the confidence of a baby-goat dared to tickle a t-rex's nutsack''

[Noxious89123]

If you hit over 150, i'd say it was making full power. Mechanic saying my bike would only be making about 50~60bhp.

Also, they're hard plastic, not rubber. Just to clear that up
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'06 Honda CBR125RW-6 ~ '00 Honda CBR600F-Y ~ '07 Honda CBR600RR-7 ~ Bikeless
'53 Ford Ka 1.3 ~ '03 Vauxhall Astra SRi 1.8 ~ '52 Vauxhall Astra SRi 2.2 ~ '53 Vauxhall Astra GSi

[Purplepill]

Nice one, it was definatly full power then, I dont have it anymore so was just curious/double checking .
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''He had the confidence of a baby-goat dared to tickle a t-rex's nutsack''

[linolino1]

this its great, but are you Looking More at buying a big bike 400 cc or bigger any one knows of any shops in udon thani where i can find bikes
Or shops sellig big bikes
You may try finding some big bikes on your local place.... or try some online big bike marketing...




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[url=https://www.buellparts.net ]buell motorcycle parts[/url]

[Naggedalot]

Most bikes arenow fuel injected...: no carbs!!!
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`80 GP100, `79 KH100, `82 CX500, `82 CB250, `o7 Aprillia SR factory-R 50cc, `08 GSF650

[Noxious89123]

[ms51ves3]

[Noxious89123]

That's a pretty good point, didn't think of that

Anyways, FI is for fag0ts.
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'06 Honda CBR125RW-6 ~ '00 Honda CBR600F-Y ~ '07 Honda CBR600RR-7 ~ Bikeless
'53 Ford Ka 1.3 ~ '03 Vauxhall Astra SRi 1.8 ~ '52 Vauxhall Astra SRi 2.2 ~ '53 Vauxhall Astra GSi

[binge]

[ms51ves3]

[Danzio]

the TL is a beautiful bike though

pleanty fast too

[Noxious89123]

[binge]

[Noxious89123]

You can't be suggesting your pitbike is more pimp than an LC?

That would require a power level over 9000
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'06 Honda CBR125RW-6 ~ '00 Honda CBR600F-Y ~ '07 Honda CBR600RR-7 ~ Bikeless
'53 Ford Ka 1.3 ~ '03 Vauxhall Astra SRi 1.8 ~ '52 Vauxhall Astra SRi 2.2 ~ '53 Vauxhall Astra GSi

[nowhere.elysium]

[Noxious89123]

Yeah but everyone knows that the 350 is the shizzle.

Binge, put an LC motor in your pit bike
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'06 Honda CBR125RW-6 ~ '00 Honda CBR600F-Y ~ '07 Honda CBR600RR-7 ~ Bikeless
'53 Ford Ka 1.3 ~ '03 Vauxhall Astra SRi 1.8 ~ '52 Vauxhall Astra SRi 2.2 ~ '53 Vauxhall Astra GSi

[nowhere.elysium]

Why is there no 'This post was written by a loon' karma button?
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'10 SV650SF, '83 GS650GT (it lives!), Questionable DIY dash project, 3D Printer project, Lasercutter project

[binge]

[Jrod]

[Adrian89]

Have you guys really restricted that kwak and the suzuki to 33bhp???
I'd love to pull up next to you at the lights, probably the only time my 400 would beat a 1000cc+ bike!
(you do realise chav's in tuned hatchbacks will be so smug with themselves if they think they've just smoked one of your bikes)

[Adrian89]

Have just re-read and think your not claiming to have restricted it but are claiming its not a bike for 'faggots,' my bad lol

[Jrod]

I did once dream of restricting a 12r! I got called mad to consider it (i wasn't gonna keep them in long )

[c_dug]

Binge i think he meant put an RD350 engine in it.

Either way that thing looks pretty damn fun.

(still got owned in the carbs vs FI with the RD pic though)

c_dug

edit:by thing i mean the pit bike
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I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.