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Fuel Fuel Delivery


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December 2nd, 2015, 04:53 PM   #21
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Can anyone identify what kind of screw drive type this is? This is the replacement screw I got from Sudco that holds the link plate to the slide. A regular Philips screwdriver ruined it in a matter of seconds when I tried to remove it.
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Keihin FCR Vacuum Release Plate & Seal-fcr-1.jpg   Keihin FCR Vacuum Release Plate & Seal-fcr-2.jpg  
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December 2nd, 2015, 06:10 PM   #22
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dunno husabutt there are so many different ones and if the quality of the bit is dodgy it doesn't work anyway

to me looks like one of those ones that needs a hacksaw run through it so you can use a flat blade
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December 2nd, 2015, 09:59 PM   #23
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Yes Bushie, that's exactly what it looks like!

Thanks guys for all these posts and ideas, this is a very interesting thread. I have no worn carbs as of yet, but I am surely going to do some preventative maintenance...
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December 2nd, 2015, 10:49 PM   #24
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Come to find out the screw with a dot is a JIS, Japanese Industrial Standard screw. A Japanese Phillips if you will. I'll probably order a set like this or just grind the tip off of a old Phillips.

8 Piece Vessel JIS Mechanic's Shop Quality Screwdriver Set - RRR Tool Solutions




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September 22nd, 2017, 12:11 AM   #25
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Originally Posted by Chinesespaceman View Post
Ok, as mentioned last night, took the carb body with drawing to an EDM shop today and they performed their magic.
The attached photos show a 6mm wide channel that is 0.8mm deep, wire eroded out of the wear areas. A quick and pain free exercise.
If I was to do again, I would get him to take back the front face of the carb body by maybe 0.2mm to get rid of the majority of the wear present on it.
A new throttle plate could be made that is thicker by the same value to compensate and keep the clearances the same.

Next step is to cut the insert strips and these will be made with 0.8mm stainless steel. They will be fettled to a good press fit and bonded into place. Any unevenness will be made good with light stoning to leave a flat surface.

It'll be a week or 2, maybe into Christmas before I get this completed and tested, but I'll report back as I make progress.

For anyone without a worn carb I would strongly urge to replace the wheels with ones that are 1mm wider and from a softer material. If there was enough volume I'd think these would become only a couple of quid each. The Keihin item is 8 in the UK. These could then be replaced every year and there will be no future issue with carb wear. I'll get some made and let you all have a look and think.


If I'm missing anything, please shout before I go flat in 6th over a cliff edge

Cheers

Gavin


P.S. Photos to follow, looks like I have to upload them first ......gggrrrrrrr
Hey mate, how Did you go with this mod/ repair? Any progress? I've got the same problem and i was thinking about using loctite epoxy weld! Hopefully it works!

Cheers
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