| Right up front
the massive benefit to this package is the completeness. When your crated
engine arrives, it is comes with carburetor, and ignition system. This
is a bolt-in power plant (photo 1) ready to roll onto the streets. It's
packed into a solid wood slate crate and mounted on an aftermarket engine
stand so that if you're still mocking a project, you have a place for that
valuable puppy while it can't be nesting in its new-found home. Beware
that the engine is held in place with galvanized metric fasteners.
Use a crescent wrench, and Bandit would suggest that you toss all but the
washers. "It'll screw up the works," he said. Whatever that means. |
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Photo 1
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Here's what the RevTech
team has to say about their package: Not merely assemblies of existing
aftermarket components, these engines have been redesigned on sophisticated
CAD equipment to incorporate the latest in engine technology. All components
are made from all-new tooling in a modern, state-of-the-art ISO manufacturing
plant to create the ultimate in high-performance and reliability.
Here's some of the
wide array of features: increased cooling fin surface area; no head or
base gaskets (they use ultra-high temperature O-rings that just don't fail);
high-performance computer-controlled ignition; two finishes available—black
with chrome covers and natural with chrome covers; compatible with original
equipment and custom frames that accept Evolution engines; available in
two motor displacements, 88-inch and 100- inch.
How about a handful
of specs:
88-inch, 4 1/4 flywheel
stroke with a 3 5.8 bore
100-inch: 4 3/8 stroke
and 3 13/16-inch bore.
Cases: made from 356T6 cast
aluminum.
Added material in all high-stress
areas for superior strength.
Removable press-in/bolt-in
bearing inserts on left and right sides of cases.
Removable bottom sump-plate
permits internal inspection.
RevTech cylinders:
Improved design with more
fins overall, and longer fins in high-heat areas for better cooling
Steel liners are Perma-locked
into the outer aluminum castings.
Cast pistons for controlled
expansion and reduced engine noise
O-ring base seals instead
of gaskets.
RevTech Heads
D-shaped exhaust ports
for maximum flow and performance.
Machined for dual plug
applications
Wider-spaced head bolt
patters
O-ring head seals instead
of gaskets for increased reliability.
RevTech Flywheels:
Forged 4340 steel for superior
strength
One-piece design flywheels
and shafts
RevTech Oil Pump: Late-style
external pump for improved efficiency and increased volume.
Chrome cover.
Carburetion:
Mikuni HSR42
Intake manifold is closely
matched to the port for maximum flow.
Cam:
RevTech '50'
.495-inch lift for good
torque across the rpm range
Ignition:
Thunder Heart ignition
module and pick-up
| This package
also includes rocker box covers, lifter blocks, smooth cam cover, pushrod
covers, RevTech oil filter and bracket, hardware, and air cleaner.
As much as we tried to reach
the metric retainer bolts, we had to tear the crate apart (photo 2) to
get at the fasteners with a crescent wrench. I know, but Bandit's garage
has a limited metric wrench selection. Master mechanic, Giggie from
Compu-Fire, formerly the doctor of mechanics at Departure Bike Works in
Richmond, Virginia, recommends that you keep all the mounting bolts loose
for the tranny and engine until you have fitted the inner primary and know
absolutely that all is in alignment. |
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Photo 2
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Photo 3
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We ran
into a problem with the boss behind the rear exhaust inlet hitting the
frame (photo 3), which needed to be clearanced before we could align the
mounting bolts. The rear cylinder is notched for motor mount bolts,
but we had to notch another fin and shorten our bolts to get them to fit
(photo 4). Other than two adjustments that are no doubt unique to this
frame, the engine slipped right in. Be careful with the top motormount
studs, we snapped one off as we tightened the motormount into place.
Makes the job a breeze when a package is as complete as this.
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Watch this project come
together in the Bikernet Garage under Sturgis 2000, Bikernet East. You'll
be able to follow the build then the grueling ride to the Badlands--don't
miss it. —Wrench
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Photo 4
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