At HAMMER PERFORMANCE, we have the expertise, equipment, and experience to provide virtually any machine
shop services your Sportster or Buell might need!
We are the EXPERTS in servicing Sportster & Buell heads!
Don't trust your cylinder heads to just anybody,
HAMMER PERFORMANCE specializes in cylinder head preparation and
we have the tools and expertise to do the job right.
Competition valve job (per head, does not include guides or seals) - $50
Remove/Replace Valve Seat (each) - $75.00
Remove/Replace Valve Guide (each, includes guide) - $20.00
Machine Head for External Head Drain (each) - $70
Repair Stripped Spark Plug Hole (each) - $30
Mill Cylinder Head Deck for Increased Compression (each) - $25.00
Cut Angled Squish Band (each head) - $40
Machine Head for Dual Spark Plugs (each head) - $50
Machine Head for Compression Release (each head) - $44.00
CC Cylinder Head (each) - $22.50
Blend/Relieve/CC Chamber for Increased Displacement (each) - $75.00
Oversize Valve Conversion with seat change (each valve)- $82.50
Hammer Performance utilizes CNC extensively to ensure accurate, quality machine work
Cylinder Boring and Honing - From $90
Trust the experts at HAMMER PERFORMANCE with this critical job!
There's nothing more important to a good running engine than
proper ring seal, and ring seal is all about a straight, round bore
sized perfectly for the piston and with a proper surface finish to
encourage ring seating. Achieving those
things though takes a combination of equipment, knowledge, and experience.
The experts at HAMMER PERFORMANCE have been boring and honing cylinders for
years and have developed and refined a process that gives perfect results
every time.
We start this process by cleaning your head
and base gasket surfaces thoroughly. We then clamp each cylinder into
our specially designed fixture with a torque plate and bore it in a
precision CNC Machine (see the video below). Unlike most boring processes, our double sided boring
head ensures a perfectly round bore because the cutters remain evenly
loaded through the entire process. Coolant is constantly sprayed into
the bore to eliminate distortions caused by heat and provide a smooth,
even cut.
Once the cylinder is bored, it's taken to our precision honing machine for
final sizing and surface finish. The honing process is cooled with a
constant flow of honing oil again to prevent distortions caused by
excess heat. Using precision measuring instruments with a resolution
down to a ten-thousandth of an inch (.0001) we hone the cylinder for a
perfect fit to the piston. Proper clearance gives better ring seal,
longer life, and MORE POWER.
For the ultimate in performance and longevity, pick up a set of
Sledge Hammer Pistons
when you get your cylinders bored and honed. We give a substantial break on the price when you do,
and you get some of the best HD/Buell pistons available today.
If you want the highest quality cylinder
boring and honing service for your Sportster or Buell, matched to the best pistons you can buy, look no farther
than HAMMER PERFORMANCE!
Precision Bore and Hone
To Next Oversize: $90ea/$180pr
XL883 to 1200: $100ea/$200pr
Note: Save money by purchasing a
complete kit from us instead.
We bundle the boring service, a set of premium quality Sledge Hammer pistons & rings, and a top quality Cometic EST top end gasket set,
and give a substantial break on the total price vs. buying everything separately.
Intake Manifold Modifications - From $60
We Modify Your Intake Manifold for a Larger Carb and More Flow
Since HD discontinued the SE manifolds for Sportsters and Buells, there's been no good way to put a Mikuni HSR45/HSR48 or CV44 onto these bikes. The only solution
has been a two-bolt style manifold and a Pro-Back or spigot adapter, and besides being expensive, those solutions move the carb out, robbing knee clearance
and requiring special carb support bracketry.
HAMMER PERFORMANCE has now solved that problem with our exclusive manifold modification service. Send us your stock intake manifold, we'll weld and CNC machine a new spigot to
accomodate one of these larger carburetors. We'll also provide the rubber boot you need to complete the installation. The carb will sit in exactly the stock location, using the same
mounting system you currently use, with no loss of knee clearance.
We can also port your manifold, with or without the big carb treatment, for maximum flow and cylinder fill.
Modify for HSR45/CV44 (includes rubber boot): $100
Modify for HSR48 (includes rubber boot): $100
Competition Porting Service: $60
Engine Building
Let us build your street or race engine!
High performance engines require
special checks and procedures that dealership techs aren't always
familiar with. Factory engines are engineered to be assembled but performance
engines need a whole lot more attention to detail.
At HAMMER PERFORMANCE, we have the tools, knowledge, and experience to do every
procedure correctly, from truing your flywheel assembly to clearancing
your cam boxes. We'll get every clearance correct from the flywheel end
play to the piston to valve clearance. We know all the tricks to get
everything out of the motor both in terms of power and longevity. Trust
your engine build to HAMMER PERFORMANCE!
XL Engine Building - call to discuss
Cam Cover Cut Down - $95
Lose the fat! Let HAMMER PERFORMANCE cut down your Cam Cover!
For that minimalist look, many Sportster & Buell owners like to trim off the
excess material behind and below their cam box cover. Cutting it by hand
is tedious and error-prone. At HAMMER PERFORMANCE, we've got a fixture
and a CNC program that does a PERFECT job every time. Send us your cover
and we'll send it back professionally machined and ready for final clean
up/polishing and installation.
We offer this service either with or without
the lower left dowel pin hole retained. We recommend keeping this dowel
hole as it provides precise alignment to the cams.
XL Cam Cover Cut Down
With Dowel Hole Retained: $95
With Dowel Hole Removed: $95
Precision Case Boring - $275
Don't trust this critical procedure to just anyone! Let HAMMER PERFORMANCE do it right!
Accurate case boring can make all the difference in the world for long piston life. The bores must be
straight, at a precise 45 degree angle from each other, and aimed squarely at
the crankshaft. HAMMER PERFORMANCE has developed a 4-axis CNC process to
perform this critical task that does a perfect job first time, every
time! This process has been used hundreds of times over the years
and it's proven to result in reliable, powerful engines.
XL Case Boring - Specify Spigot Size - $275
Other Common Shop Services
For Sportsters & Buells
If you don't see what you're looking
for, please give us a call. Chances are we can either do it for you or
send you to someone who can.
Update Tappet Anti-Rotation Pins in 91-99 Engines to 00-up Style - $75
Gap Rings and Assemble Pistons into Cylinders - $75
