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Discussion Starter #1 (Edited)
Just did the 12,000km service on my 2013 F3 800.I ride to work every day so I guess the results should be expected.The Exhaust valves where pretty good but the intakes are tight ! Must be all the dirty air ...

Range in the manual calls for inlets to be between 0.15 & .24 .Cylinder 1 & 3 both have a valve thats right on the limit(.15). I've buttoned her back up for now but dont intend on leaving them that tight.
Has anyone ever attempted to shave down shims with some fine sand paper ? I'm not sure where else I could find shims in this country.

Also the plugs that I pulled out were the Iridium plugs. Do the F3's come stock from the factory with iridium plugs ?
 

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Can't speak for the standard plugs, although most manufacturers are now using iridium as standard equipment.

I can speak about shims...you can't "shave" them.

The good news is the shims are a size (diameter) found in other more popular brands (think Japanese). I am not sure what size the 3 cylinder bikes use, but a bit of research will reveal all.
 
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Discussion Starter #3
I have seen the threads mentioning 7.48mm diameter shims for the F4 but nothing that points towards the F3's having the same size shims.
 

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I have shaved down many a shim using sandpaper and a flat steel or glass surface. The key is to sand in a figure 8 and spin the shim in your grip every couple of 8s to keep the surface as flat as possible.
Go slow and check often.

We used 200 and 400 grit in the past. Wet with WD40 or oil to suspend the particles.
 

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I have a 2013 F3 800 aswell and did check clearance three times so far.

Shim dimensions:
Diameter = 7.48mm
Thickness = 1.65-2.15mm Do not use shims <1,60mm !! (like stated in manual)

Shims are the same as in Japanese bikes, f.e. CBR600RR
Easy to get in any dealership so 'shaving' them is not my advice...
 

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Sometimes you need a size between the sizes available to obtain the desired clearance.

There is nothing wrong with sanding down a shim. Manually sanding is not going to change the hardness of a shim.

You can even do it using a small lathe for more precision if desired. Motorsports mechanics have been grinding and shaving shims a long time.
 

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Sometimes you need a size between the sizes available to obtain the desired clearance.

There is nothing wrong with sanding down a shim. Manually sanding is not going to change the hardness of a shim.

You can even do it using a small lathe for more precision if desired. Motorsports mechanics have been grinding and shaving shims a long time.
If you are between sizes just go for more clearance unless you racing for a living ...

Manually sanding or even a small lathe will not guarantee parallel surfaces on your shim.
If you really mess it up it can give extra lateral forces on the buckets.

A flatbed grinder is the only machine I would trust and used for this (in the past).
 

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7.48mm Shim kits are available cheaply, should be plenty on ebay, do not be tempted to sand your shims, the F3 valve train is fragile enough without tempting fate
 
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