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r6 de-restriction

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lews123
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Joined: 02 Jan 2009
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PostPosted: 20:30 - 02 Jan 2009    Post subject: r6 de-restriction Reply with quote

hi all im new to this forum, im jus having ago at de-restricting my bike, ive took the tank and airbox off and am now trying to remove my carbs...is it true i need to totaly remove them? any help would be appreciated i cant acutaly see how to remove them
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Wafer_Thin_Ham
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Joined: 18 Nov 2005
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PostPosted: 21:25 - 02 Jan 2009    Post subject: Reply with quote

Yes you need to completely remove them. The washer is between the cylinder head and the carbs. It'll be sat in the carb rubbers. There's a jubilee clip securing the carbs to each rubber, just unscrew that wiggle the carbs off. It'll be quite tight. Thumbs Up
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lews123
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PostPosted: 22:52 - 02 Jan 2009    Post subject: Reply with quote

so the same sorta attatchment as the airbox to the top of the carbs then? i asume the jubilee clips are hiden low down?
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Andy levitt
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PostPosted: 12:01 - 03 Jan 2009    Post subject: Reply with quote

No you dont have to totally remove the carbs i didnt. If you loosen the carb, the four bolts one per cylinder from top of engine and pull them up they should give you enough room to take each washer out without the need to take the whole carb off. Once done that unscrew the black caps facing forwards. There should be 4 bolts on each one. 4 altogther. Then a spring will be in there. Inside the spring will be a black tubular pastic cap sorta of thing. Take each one out put everthing back togther and hety presto a totally derezzed bike.

Sorry i dont know the prober names for each thing but thats the basis of getting it derezzed.
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lews123
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PostPosted: 12:54 - 03 Jan 2009    Post subject: Reply with quote

my problem is i cant see or get to the bolts lol can anyone point me in the right direction?
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Kickstart
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Joined: 04 Feb 2002
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PostPosted: 13:00 - 03 Jan 2009    Post subject: Reply with quote

Hi

Depends on the exact model of bike, and which restrictor kit is fitted.

Common FI kit is some washers after the carbs. For these you will have to remove the carbs.

Think the Yamaha kit for the fuel injected bikes uses a combination of a different ECU and a throttle stop, and there would likely be no need to remove the throttle bodies for these.

Some will have been bodged by a dealer to restrict them. Ie, with a throttle stop.

The way Andy levitt suggests sounds like someone has put something above the "slides" on the CV carbs to stop them opening fully. Which sounds like a pretty risky way of restricting the bike unless some rejeting has been done at the same time.

All the best

Keit
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Noxious89123
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Joined: 10 Jun 2007
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PostPosted: 15:03 - 03 Jan 2009    Post subject: Reply with quote

Kickstart wrote:
The way Andy levitt suggests sounds like someone has put something above the "slides" on the CV carbs to stop them opening fully. Which sounds like a pretty risky way of restricting the bike unless some rejeting has been done at the same time.

All the best

Keit


This is how my carb'd CBR6f was done. Little platic bits above the slides to stop them opening fully, and washers between the carbs and head.

It doesn't mess with the mixture, because the slide and needle open together, so it stops them both opening. Just means that no matter how wide you open the throttle, the slides will only ever be able to open to about 40%.

Here's the thread i started when i did it; https://www.bikechatforums.com/viewtopic.php?t=146442

Washers;
https://img172.imageshack.us/img172/2674/1004843v2tp3.jpg

Little platic bits above the diaphragms;

https://img512.imageshack.us/img512/1551/1004900za3.jpg
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Last edited by Noxious89123 on 15:12 - 03 Jan 2009; edited 1 time in total
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Kickstart
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Joined: 04 Feb 2002
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PostPosted: 15:11 - 03 Jan 2009    Post subject: Reply with quote

Hi

Noxious89123 wrote:
It doesn't mess with the mixture, because the slide and needle jet open together, so it stops them both opening. Just means that no matter how wide you open the throttle, the slides will only ever be able to open to about 40%.


It should affect the mixture. That slide on CV carbs is not the throttle slide, and in normal use will not limit the airflow. The throttle is later on. Likely if you restrict the movement of the slides you will limit the fuel flow rather more than the airflow.

In yours they have restricted the airflow after the throttle as well.

All the best

Keith
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loply
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Joined: 24 Mar 2004
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PostPosted: 15:16 - 03 Jan 2009    Post subject: Reply with quote

On my SZR660 the restriction was implemented by a plastic tube, identical to those above, being placed above a slide in the carbs. The slide in question was the kind that rises naturally with the airflow and it had a needle valve on it, but this carb had another needle valve too (big single I guess).

In my case though, it was a bit of roughly cut PVC plumbing pipe Very Happy
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Noxious89123
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PostPosted: 15:26 - 03 Jan 2009    Post subject: Reply with quote

Ah, i see what your getting at now.

Because the throttle butterfly is not restricted, that can still affect the airflow, whereas he slide and fuel jet are limit in their movement.

I guess that is why they fit those washers too then!
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