UK Karting - Notice Board (2-Stroke Karting) : Re: 'DavyBoy'

Notice Board (2-Stroke Karting)

Re: 'DavyBoy'
Posted by 'dth07' on 23 Jan 2010 @ 20:44

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dth07Joined: September 2002
Total Posts: 1
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Its relatively easy to do - but as with most thing only if you know what you are doing.

You can just slap a piston in, but every now and again the bore will need to be "honed" - this will score it with tiny grooves to retain the oil. I recommened you get someone who knows what they are doing to do this for you or you could end up with a bore that isnt "true" (wonky) and this will cause you no end of trouble.

The piston is usually held in place with a pin at the top of the con(necting) rod with 2 circlips either end to stop the pin falling out. Its a simple case of removing the circlips and popping out the pin, then reversing the process with a new piston.

The bore needs to be measured to get the correct size piston - you'll need a smaller size piston than the bore to allow for some expansion when it gets hot. (I'm sorry I cant remember the clearance anymore).

You will also need to make sure the piston ring has the correct "gap". Too small and it will cause a seize, too big and it will loose you power. (Again I cant remember what we used to set it to.)

I would get someone to walk you through it the 1st time and give you the measurements, after that, it's a doddle.

Message Thread:

100cc direct drive engines by 'Facemiester' (22 Jan 2010 @ 22:06)

Re: 100cc direct drive engines by 'QuickOldTimer' (22 Jan 2010 @ 22:27)

Re: 'QuickOldTimer' / 'steviep19' by 'Facemiester' (23 Jan 2010 @ 18:45)

Re: 'QuickOldTimer' / 'steviep19' by 'steviep19' (23 Jan 2010 @ 19:12)

Re: 'steviep19' by 'Facemiester' (23 Jan 2010 @ 21:46)

Re: 100cc direct drive engines by 'steviep19' (23 Jan 2010 @ 11:15)

It is true ! by 'DavyBoy' (23 Jan 2010 @ 19:37)

Re: 'DavyBoy' by 'Facemiester' (23 Jan 2010 @ 20:01)

Re: 'DavyBoy' by 'Facemiester' (23 Jan 2010 @ 20:19)

Re: 'DavyBoy' by 'dth07' << You are here!

Re: 'DavyBoy' by 'Facemiester' (23 Jan 2010 @ 21:10)

Re: 'DavyBoy' by 'Booney' (24 Jan 2010 @ 8:11)

Re: 'DavyBoy' by 'DavyBoy' (24 Jan 2010 @ 10:12)

Re: 'DavyBoy' by 'Facemiester' (24 Jan 2010 @ 21:40)

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