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wot is a frebore on a bike

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shager
Scooby Slapper



Joined: 04 Jan 2006
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PostPosted: 20:06 - 28 Mar 2006    Post subject: wot is a frebore on a bike Reply with quote
wot is a rebore on a bike an wot does it do
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phantomtek
Lil Joe Tek



Joined: 20 May 2005
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PostPosted: 20:09 - 28 Mar 2006    Post subject: Reply with quote
Makes the cc bigger.


Irc just now wrote:
[19:08] <BCF> shager: wot is a rebore on a bike?
[19:08] <Wave2k> making the cc bigger
[19:08] <BCF> shager: wot do u have to do to do it?
[19:09] <Wave2k> you cant rebore yourself
[19:09] <ggg_> if you have to ask, you aren't skilled enough to do
[19:09] <BCF> Phil_G: complete engine rebuild - new piston/s and rings, possibly liners etc etc - why you ask?
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element
World Chat Champion



Joined: 23 Jan 2006
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PostPosted: 20:17 - 28 Mar 2006    Post subject: Re: wot is a frebore on a bike Reply with quote
shager wrote:
wot is a rebore on a bike an wot does it do


The barrels aka the "holes where the pistons go" are originally bored to a size. Rebore is skimming an extra mm or so, fitting bigger piston(s) and result = increased CC (so if you had a 100cc you can go to 120cc for instance). Sometimes you have to rebore and sometimes people do it for a speed increase..

Talking of rebores a mate has just paid nearly £500 on a set of pistons and a rebore for his 84' gsxr 750... ouch..

https://www.daverushton.co.uk/rebore.htm

Look at the pics there. Reboring is just making those holes bigger Smile
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sickpup
Old Timer



Joined: 21 Apr 2004
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PostPosted: 20:51 - 28 Mar 2006    Post subject: Re: wot is a frebore on a bike Reply with quote
element wrote:

The barrels aka the "holes where the pistons go" are originally bored to a size. Rebore is skimming an extra mm or so, fitting bigger piston(s) and result = increased CC (so if you had a 100cc you can go to 120cc for instance). Sometimes you have to rebore and sometimes people do it for a speed increase.


Not quite right. A rebore would normally be making the hole .25-.5mm so as to fit a slightly bigger piston due to wear. A big-bore would be done to increase CC.

element wrote:

Talking of rebores a mate has just paid nearly £500 on a set of pistons and a rebore for his 84' gsxr 750... ouch..


Got a set of new MTC1277cc pistons waiting to go into one of my Bandit 1200 lumps but need a Wiseco block for them really. Makes that look cheap. Whats CC's your mates going up to?
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Old Thread Alert!

The last post was made 20 years, 9 days ago. Instead of replying here, would creating a new thread be more useful?
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