Alpha V.3 Classic Digital Ignition System
For 1970 through 1978
Airheads R50,R60,R75,R80,R90 and R100
The Alpha V.3 ignition is a fully
digitally controlled system that eliminates the points, condensor,
and mechanical spark advance unit of the original design. The
extreme accuracy and consistency effectively eliminates the timing
errors that are typically built in to the original parts. Gone
too are the blurred or double-imaged timing marks that almost
always indicate the amount of difference in timing between cylinders.
The power delivery is noticeably smoother and crisper, especially
at higher speed. Starting is much easier as well.
Installation is a breeze with
only hand tools needed, and a strobe timing light to get it right.
The wiring connectors on the included harness are the factory-type
with easy push releases. There are only 3 other color-coded wires
that are attached to the coils, and that's it.
The ignition module is the same as the latest design specified
by BMW for Airheads but with added hardware inside to control
the spark advance as well as coil control. The module is permanently
riveted to the large base so there's no longer any need to disassemble
and renew the heat sink paste as before. The ignition module mounts
horizontally under the frame just in front of the seat via the
rear fuel tank mount lower nuts. The mounting brackets are nicely
formed stainless steel as are all the supplied fasteners.
The sensor plate is very precisely fitted with a Siemens magnetic
sensor switch (Hall sender) that has proper high temperature wiring
routed through a new ventilation/wiring rubber tube. The factory-type
quick disconnect on the end is made from a modern, much-improved
plastic material which will not deteriorate and fail like the
originals often do.
ALPHA Ignition System V.3
For 1981 through 1995 Airhead
high-quality Hall sender system is an exact replacement for the
original parts on all 1981 through 1995 Airheads.
The original Hall effect electronic
ignition system fitted to the BMW twins from 1981 through 1995
was far from optimum, even by 1981 standards. By this time, digitally
controlled ignition systems were common on autos and motorcycles.
BMW continued to use a "half-way house" electronic ignition
that relied on mechanical bob weights and springs to control the
spark advance curve , all the way to the end of production in
1995. Mechanical spark advance control is not necessarily bad,
unless it is non-serviceable which was the case with the parts
BMW used. The marginal internal lubrication of the moving parts
tends to go away after some years, very often resulting in a sticking
advance unit and worn pieces. This was usually evidenced by the
idle speed sticking at 1500-2000 RPM or hard starting.The ignition
Hall sender unit did not evolve or change one bit in 14 years.
The price DID evolve, ever upwards, to the current (Sep. 09) price
This high-quality Hall sender
system is an exact replacement for the original parts on all 1981
through 1995 Airheads. Requires NO modifications or rewiring,
with no need to change the original coil(s).Bolt it on, plug it
in, and set the timing-nothing difficult for the home mechanic.
All of the housing parts are CNC machined
from billet aluminum. The short, rigid steel drive shaft is supported
on both ends by SKF ball bearings, which are held in place by
common circlips. All O-rings, seals, and bearing seals are made
of high temperature Viton material. All the fasteners are stainless
steel socket head screws.
Installation is a breeze and
requires NO modifications.
Digital control of the advance
curve assures that it will be ultra precise and provide consistent
timing for both cylinders that results in a very smooth power
The new ignition control module
is the latest heavy-duty type with the very thick heat sink mount.
The digital processor controlling the advance curve is integrated
inside for totally plug and play installation.
The timing specifications
are essentially the same as the factory design for worry-free
repair of failed originals:
Startup 6deg. BTDC,maximum
advance of 32deg. for a total range of 26deg. Advance begins at
1400 RPM and maxes out at 3000RPM.
The timing specifications
for a dual-plugged engine are very similar,but less advance is
Startup is still 6deg. BTDC, advance begins at 1400RPM but is
limited to 22deg. of total advance range.
The only difference in the
single plug and dual plug systems is the control module. Since
it's all plug and play it will be a snap to convert a single plug
to dual in the future with just a new module, which is sold separately.
ALPHA V.3 Ignition 1979-1980
Converts points-in-a-can to
Dedicated wiring harness and
factory-type connectors makes for a very easy install.
NOTE: Requires changing
the coil(s) to 1.5 ohms total primary resistance, such as the
Dyna brown coil. Spark plug wires must have 5K ohm resistor caps
for protection of the other ignition parts.
Ignition Switch - NLA from
3-position for 1974 models
and 2-position switch for 1975 through 1984 models $149.95
Comes with 2 keys. These switches will
replace any threaded-ring mounted switch. The 3-position switch
is also useful as a headlight switch on machines that did not
Excellent quality reproductions that
will keep the function and look of the stock design.
WHICH COIL DO I NEED? Choosing
the right Dyna coil for your BMW: The type of ignition system
fitted on the bike will determine the coil or coils needed that
best match the system requirements. The resistance value of the
primary winding must be closely matched to the original specifications.
GREEN coils have 3 ohms primary resistance, Single
coil for 1970 - 1980 models with points.
BROWN coils have 1.5 ohms primary resistance,for
1981 through 1995 Airheads with EARLY, SMALLER ignition module
and single plugs.
Dual coils (pair) for all 1981 - 1995
with DUAL-PLUG IGNITION
BLUE coils have 0.7 ohms primary resistance, for
1981 through 1995 Airheads with HEAVY-DUTY ignition module and
New Bosch Coils For 1970 Through 1980
Models : /5 , /6 , and /7, R90S 6 volt $139.95 pair
These are the high-energy Bosch coils
known for years as " Blue Coils" because of their distinctive
color. Now, they're just natural aluminum but still the great
replacement coil for tired, aging original coils that don't develop
the full spark energy they might have had 30 or more years ago.
Very often, installing a new set of these coils will restore easy
starting, smooth running, and greater economy than was normal
with the original coils . These coils are 6 volt, wired in series,
just like the original design specification, and they will fit
directly into the original coil clamps. These are the newest production
from Bosch's new factory in Brazil. Beware of "Blue Coils"
that show up on the 'net at a remarkably low price! There are
several knock-offs out there, clever copies visually but invariably
of poor quality
Hall Sender Plate for Oilheads $295.00100 Hall Sender $225.00
Brand - New, Genuine BMW Part. Fits
all R1100, 1150, and 850 four - valve models .
Replica Plug Wires for R90S,
all /5 and /6, $50.00 per Pair
These plug wires are no longer available
from BMW, but these are exact duplicates of the original wires
that came on the early Airheads,constructed with parts from the
original suppliers to BMW.They have the correct 1K ohm resistance
and the braided-cloth-covered length of fuel line for abraision
prevention.Ready to plug in at both ends and renew the performance
and looks of your classic!
Plug Wires $40 Pair (55' - '69 Boxers only)
Spark Plug Wires are frequently overlooked
as a cause of hard starting or poor performance. Bad spark plug
wires can damage magneto coils on vintage BMWs as well. These
wires are correct in appearance and in function and have 0 ohms
resistance to keep the mag coil cool.
Red, Blue or Yellow $35.00
Basic Black $25.00
All wires come with 5k ohm NGK caps
(as shown). Fit Airheads only.
K75 Plug Wire Set, all years/models $84.95
Same quality materials and correct coil
connector as on the 4 cylinder wire sets.Keep that K75 running
like an atomic clock.
for 4-Valve K100, K1100 $89.95/4
Fits 90-93 K1,K100RS and all years
These spark plug wires are made from
very good quality jacketed copper cable, with the correct 5K ohm
resistor in the NGK caps. The caps are correctly sized for a snug
fit on the 12mm sized K plugs made with the screw-on terminal
nut on the end. The coil ends are the correct brass barrel - end
type for the K100, and clip-on types for the center stud terminal
found in the K75 and K1100 coil sockets. Thick rubber boots at
the coil end keep moisture away from the connectors inside. The
air-gap coil connectors aren't cheap, or easy to find other than
expensive original BMW parts. By using the exact correct part,
easy fit and long service are assured. Why pay the exorbitant
factory price, when these wire sets can restore smooth running
and efficiency to an engine suffering with 23 year old plug wires?
Do you run your car plug wires for 20 - plus years? Didn't think
so but if you do, the car needs help too!
Wires, 1994-2003 models $74.95
Fits all years of R850, R1100, and
R1150 4-Valve Twins
These top-quality replacement wires
are constructed from highest-quality components that are the same
as used by the original equipment manufacturer. The plug caps
are the CORRECT 90 degree bend, with grab areas for the removal
tool found in the tool kit. This pair of wires costs the same
as ONE wire does from BMW.
BP7ES - R75/5-6-7, R80/7, R80 G/S, R90/6 , R100/7 , all 1000cc twins from 1981 onward
B8ES - /2 with LK heads, R60/5 - 6 - 7, R65 all, R90S , R100S and RS before 1981
B8HS - R69S
D8EA - 2 valve K75 and K100 , F650 w / carb
DR8EA - 4 valve K 100, K 1100, F650 w / FI
D8HA - 12mm thread diameter, for lower hole in dual - plugged heads
Bosch plugs are no more. Happily NGK
fills the gap with the proper plugs to keep your Airhead, F650
and K-Bike motoring along. NGK spark plugs are made to the same
level of quality, and incorporate all the same important design
features of the original Bosch part.
Ignition Module for ALL 1981through 1995 Airheads, $95.00 with
This is the same control unit now being sold by BMW as the
replacement for all previous versions. It incorporates a massive
heat sink to better deal with issues caused by over-heating. The
module is permanently riveted to the heat sink to insure clean
surfaces for proper heat transfer, so there is no recommended
maintenance as on the earlier designs.
The ignition control module now controls the dwell time independently
of the Hall sender,to improve the sometimes uneven startup and
cold idle,especially. This also helps maintain accuracy as the
old original parts in the Hall sender may wear.
The heavy-duty ignition control unit comes with a genuine BMW
mounting bracket for easy, bolt-on replacement. The original harness
connector plugs right in, just like stock.
Ignition Control Unit for Boxer $60.00
Ignition Control Unit-Used on all boxers
with factory electronic ignition, up to 1993. These are not from
the original equipment supplier, but they are very reliable and
work the same in every way. Oh, and more thing: they cost over
a hundred dollars LESS than the originals! Take the money you
save and ride a few more miles :)
Coil '55-'69 Airheads R51/3 through /2 Twins $160.00
Great replacement for the ever-aging
and failure - prone original magneto coils. Almost all of the
original coils are now failing routinely. A sure indication of
this progressive failure is hard starting when hot. As it gets
worse, there may soon be misfiring at high speeds as well. These
coils are of modern, improved design and manufacture for a perfect
fit and restored reliability. Made with an external ground wire
connection for increased reliability , and the high-tech resins
and plastics used in their construction means they should help
keep your bike around for the next 50 years. Make it right with
a new condensor, $8.
(It is strongly recommended that the
condensor should be replaced whenever a new coil is fitted . Old,
failing condensors can cause serious coil problems on even a new
part . These new ones come with the wire made on, so there's no
tedious soldering like the originals.)
Original BMW parts for long life.