You may be confusing the concept of: 'Honing' and 'Boring'.
Assuming you mean a standard type of cast-iron liner engine (100 or 115cc) type engine, then a particularly scored or worn barrel can be re-drilled (bored) to the 'next size up'. Strictly, the number of 're-bores' is dependent on how badly the engine is worn/damaged. Your engine builder will bore the engine until the signs of wear or damage are 'bored' away. Pistons are available in various diameters and the engine will be bored to the appropriate size of an available piston. Often, your engine will be sufficiently worn/scored/scratched to need you to skip one or two piston sizes. Thus, there is no way for us to tell you how many 'bores' are 'left' in your barrel as that all depends on the damage done the NEXT time the engine has a problem...... and of course, how many times it's been bored already.
So, boring takes quite an amount of material from the barrel wall.
Honing, on the other hand, is running a spinning tool through you barrel which often uses straight-sided honing stones. These are used to leave extremely small 'scratches' which improve the sealing of the rings to the bore. It can also remove MINOR imperfections. Honing is more subtle than it sounds and the angle and dept of the 'scratches' makes considerable differences. Many will argue that the scratches help retain oil between the piston and the barrel
Here's a 'hone' tool. It's put into an electic drill and spun inside the stripped barrel.
http://www.ebay.com/itm/K-D-Hand-Tools-3029-Economy-Brake-and-Engine-Cylinder-Hone-Set-/230748335030?pt=Motors_Automotive_Tools&hash=item35b9ac2bb6&vxp=mtr
Do NOT buy that one unless you have checked it's correct for your engine. I just picked an image at random just to show you what they are.
Ian
|
|
Barbells by 'Budge1987' (19 May 2013 @ 14:08)
