port and polish dremel style?

Smoto Bob · World Chat Champion Joined: 06 Dec 2003 Karma :

Been reading up allot on the difference between the klX and klR and the early ones it was only the head flow apparently and slightly higher lift cams.

Anyway as its 16k later and probly all coverd in coke ect, Can i port and polish the head my self? as i think i might change teh rings soon

Used to file the ports on the dt125 head ect for more power Rolling Eyes

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kev · I Hump Things Joined: 07 Oct 2002 Karma :

You can do it yourself but its not just a case of making them smoother its more the shape you make the port into.
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Retro-Man · Traffic Copper Joined: 21 Aug 2004 Karma :

agree with Kev

the shape is more important than being smooth, also you have to balance both inlet and exhaust ports,
its all about improving flow through the engine.. Thumbs Up

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Big Pete · Spanner Monkey Joined: 18 Jul 2004 Karma :

There are two books by A.G .Bell, all about engine tuning which show the port shapes etc that help gas flow. I will dig out my copies and post the ISBN numbers etc for you. A dremel with the correct burrs and a flexible shaft works a treat I`ve done a few heads with a variety of tools and the dremel is nice for small heads.
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Smoto Bob · World Chat Champion Joined: 06 Dec 2003 Karma :

Finglonga · World Chat Champion Joined: 27 Jul 2004 Karma :

Have a look here... https://www.mustang50magazine.com/techarticles/23018/ its not bikes but explains what is involved. Cool

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Smoto Bob · World Chat Champion Joined: 06 Dec 2003 Karma :

wow thats very interesting mate cheers.
Thumbs Up

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Big Pete · Spanner Monkey Joined: 18 Jul 2004 Karma :

this is the first book, the second is called

new generation engines -performance tuning etc, and amazon has it as well.

HTH
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Big Pete · Spanner Monkey Joined: 18 Jul 2004 Karma :

this is better, it has all his books

https://www.amazon.co.uk/exec/obidos/search-handle-url/index=books-uk&field-author=Bell%2C%20A.Graham/202-7330019-9155849
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Rory · Traffic Copper Joined: 14 May 2004 Karma :

If you do work on the inlet ports, don't polish them up - a slightly rough finish keeps the air turbulent and stops mixture from condensing on the walls.

If you're wanting the bike to rev faster, and you've got CV carbs, you could drill the slides out by 0.5 mm.
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Smoto Bob · World Chat Champion Joined: 06 Dec 2003 Karma :

tryed Flat side carb but was a bit on the choppy side Shocked

i have a pumper carb ready to be dyno'ed and set up properly.
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F'it DO WHAT EVER MAKES YOU HAPPY!!!!! Even if it screws over everyone else :p
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