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Price: $40 Single, $70 twin, $95 triple, $120
in-line four
Boring and honing an internal combustion engine
cylinder is much more complex than the old drill motor and
 hone
in a bucket of solvent method. Observing proper shop practices and using the
best tools
during the boring and honing processes gives the best chance for long cylinder
life and highest engine performance.
Matrix Motor Sport uses state-of-the-art Winona Van
Norman equipment to resize and hone the bores of single to four cylinder in-line
motorcycle and kart engines.
 | The CB1401 Cylinder Boring Machine resizes bores
from 1.5" to 4.0". Its high quality and sturdy design ensures a bore that is
square to the mounting surface and has an infinitely variable spindle feed
rate to keep surface fracture to a minimum. |
| The PS1370 Power Stroke Cylinder Hone and
Friction Head Hone Head produces a precision finished diameter, consistent
surface finish, and the proper cross-hatch pattern. |
Basically, the boring process resizes the bore
diameter
 to
a target dimension and prepares the surface for the hone. But, it also ensures
that the centerline of the bore is perpendicular to the cylinder mounting
surface, the bore is perfectly round, and the diameter is consistent throughout
its length.
 Attention must also given to the surface quality of
the cylinder wall. The boring machine employs a rotating cutter bit that is
pulled through the bore from the top to the bottom. Boring to an oversize
requires several passes of the cutter until the bore is brought out to within
.002" to .003" of the target diameter. As the tool removes material,
the surface of the cylinder wall becomes fractured and is unsuitable as a
sealing surface for the piston rings.
The goal of the honing is to;
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| grind through the fractured surface |
| complete the bore resize without creating an
out-of-round, coke bottle shape, or hourglass shaped bore |
| leave the finish and cross-hatch pattern
necessary for an effective ring
seal. |
Failing to accomplish each of these crucial final
steps will most likely result in a shortened life span for the cylinder and less
than optimum performance from the engine.
Trust Matrix Motor Sport for all of your precision
cylinder work.
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