BMW AirHead performance

The big daddy! Increase your 980cc Boxer to 1070cc, adding lots of power and torque in the process. It includes new alloy Nikasil plated cylinders, stainless pushrod tubes, lighter forged pistons offering 9.5:1 compression ratio, piston rings, lighter forged con rods, big end shells, gudgeon pins and circlips, asymmetrical camshaft and all the necessary gaskets and rubbers to fit it on your engine. Increases the real power to over 80BHP with a noticeable increase in the torque available.

£1799.00

Power kit to replace your existing 980cc engine cylinders with alloy Nikasil plate ones mated with forged, lighter (by 140gr) pistons and its rings, gudgeon pins and circlips. It comes complete with stainless steel pushrod tubes and tall the necessary gaskets and rubbers to fit it on your engine. It will increase the real power to over 67BHP+ on the road models. Compression of 9.5:1, it offers a noticeable increase in the torque available, specially at mid-range.

£799.99

Power kit to upgrade your existing 800cc engine to 1000cc with alloy Nikasil plate cylinders, mated forged, lighter (by 140gr) pistons and its rings, gudgeon pins and circlips. It comes complete with stainless steel pushrod tubes and tall the necessary gaskets and rubbers to fit it on your engine. It will increase the real power on road models to over 64BHP+ or 60BHP+ on GS models. Compression of 9.5:1, it offers a noticeable increase in the torque available, specially a mid-range.

£799.99

The famous and legendary "pumper" Dell'Orto carburettors fitted to the BMW R90S. Outstanding performance due to its accelerator pump design (injecting additional 4cc of fuel every time you WOT) giving instant acceleration through the gears. Sold as a pair, brand new outright, other spares, including cylinder head metal sleeves (essential for non R90S models) rubbers sleeves, jets, cables etc necessary for the conversion are available. Please contact us with your requests.  

£459.99

K&N needs no introduction, the best replacememt air filter for your bike, washable and re-usable, it uses premium quality oiled cotton gauze sandwiched between layers of wire screen. Except under very dusty conditions K & N filters will only need washing and re-oiling every 10,000 to 15,000 miles. Excellent filtration with improved air flow. Direct replacement of your original cylindrical paper air filter(fitted on Airheads between 1969-1980), easily fitted in minutes.

£34.99

K&N needs no introduction, the best replacememt air filter for your bike, washable and re-usable, it uses premium quality oiled cotton gauze sandwiched between layers of wire screen. Except under very dusty conditions K & N filters will only need washing and re-oiling every 10,000 to 15,000 miles. Excellent filtration with improved air flow. Direct replacement of your original rectangular paper air filter(fitted on Airheads between 1981-1996), easily fitted in minutes.

£54.99

Excellent quality oilo cooler kit, designed to keep your oil temperature at constant level, preventing overheating, specially useful if you ride in a hot climate or do a lot of inner city riding. Complete with all the necessary components to convert any Airhead, fitting the oil cooler under the steering head, as per the original R100RS models. Free flowing system, thermostatic plate is available separately for an extra £199.99.

£279.99

The easiest and cheapest way to increase the performance and reliability of your Airhead engine. Simply add another 1 litre of oil! The extra capacity will give time for the oil to cool more efficiently and keep its high lubrication properties. Very effective and useful. Made of cast alloy by Raask in sweden. Fits exactly as the original. Oil sump gasket included.

NLA

This kit produces 450 watts, 33 amp of power at much lower engine speeds than before. The kit contains a replacement rotor, stator windings, brush and spring set, diode board, connecting wires, allen wrench and a rotor removal tool. The original alumininum stator cover with brush holder from the original is retained. This requires soldering 3 connections. Installation is very straightforward; remove the original parts and bolt on the replacement parts. The high output voltage regulator is recommended.

£269.99

This kit produces 450 watts, 33 amp of power at much lower engine speeds than before. The kit contains a replacement rotor, stator windings, brush and spring set, diode board, connecting wires, allen wrench and a rotor removal tool. The original alumininum stator cover with brush holder from the original is retained. This requires soldering 3 connections. Installation is very straightforward; remove the original parts and bolt on the replacement parts. The high output voltage regulator is recommended.

£269.99

Electronic ignition conversion kit, fits BMW Airheads pre-1978. This kit is similar to the Micro Digital but includes very high performance digital coils. Special versions can be supplied for racing or twin plug heads. For more information about Boyer Brandsen products, please click "More Info" button.

£154.99

Electronic ignition conversion kit, fits BMW Airheads made between 1979-1980. This kit is similar to the Micro Digital but includes very high performance digital coils. Special versions can be supplied for racing or twin plug heads. For more information about Boyer Brandsen products, please click "More Info" button.

£154.99

This voltage regulator allows charging at much lower revs, so it is very good for town riding or pottering around. Standard fitting on Police spec motorcycles. End that irratating battery drainage through short rides plus no more alternator light flickering at low engine speeds!

£94.99

Fits ALL BMW 2-valve twins made from 1969-1996 and comes complete with new wires and fasteners. The High Output diode board has a massive heat sink for the large-capacity diodes giving even better cooling to ensure maximum reliability. The new red wire provides a low resistance path for the charging current to return to the battery, a frequent weakness on many aging machines. This is the same diode board that comes with the 450w alternator kit, offering 33 amp over the stock 20 amp.

£69.99

The PC925L battery is a Drycell AGM maintenance free battery, a powerful option to the original battery fitted on most 2 valve twins and. It has the positive terminal on the left and can be mounted on its side to replace the original equipment 25 or 30amp battery. Dimensions (mm) 169x179x128mm tall, with a charging capacity of 26 ah @10 hr rate, 380 CCA with a boost of 925 cranking amps for 5 seconds, offering 53 minute reserve capacity. Weighs 11.8Kg. Simply outstanding!

£134.99

The famous 336 cam, offered originally by BMW in the Seventies as a Sports option, common fittinng on the iconic BMW R90S, outstanding mid range power without sacrificing excessively lower range tractability. As fitted to our own bikes. Highly recommended for performance tuning. Please note these are available off the shelf for post 1979 bikes, earlier fitting is available by special request.

out of stock

Excelent replacement start motor, manufactured by Nippon Denso, fits all Airheads build after 1977 to 1996. well suited for performance-modified engines. The high torque planetary gear design DOES NOT use glued-in magnets for the motor fields. Robust construction and rebuildable. it weighs 2.8Kg, nearly half of the original Bosch. It draws 80 amps of battery current instead of 120 amp draw by the original Bosch. Brand new, direct replacement, no modifications required, complete with all necessary fittings.

£289.99

£154.99

These EBC Pro-lite replacement discs (front or rear) offer higher (18% extra) braking power over stainless steel discs. The fully floating design reduces un-sprung weight, eliminates rotor distortion and extends pad life. EBC discs have been designed to be used with matching new EBC brake pads and these must be used or the warranty will be invalidated. Sold as a single disc, please state your bike's year and model, front or rear fitting with your order. For EBC brake pads, press here

Top quality stainless steel set of exhaust manifolds with a single crossover pipe. Manufactured here in UK to the highest standards, it carries a 10 year guarantee, fits exactly as the original items with no modifications to mounting brackets,carburation or ignition. Noise output is comparable to the original silencer. They are polished to a mirror finish which has a close resemblance to chrome plating. Please state your bike's model and year when ordering.

£194.99

Top quality stainless steel set of exhaust manifolds with double crossover pipe. Manufactured here in UK to the highest standards, it carries a 10 year guarantee, fits exactly as the original items with no modifications to mounting brackets,carburation or ignition. Noise output is comparable to the original silencer. They are polished to a mirror finish which has a close resemblance to chrome plating. Please state your bike's model and year when ordering.

£227.99

Pair of the ever so popular Megaton reverse cone chome silencers. It measures 17" (432mm) in lenght, it accepts header manifolds of 1 3/8 to 1 3/4 (35mm to 44mm) so suitable for all the Airheads, including the R45/65 with 35mm manifolds. Complete with an universal adjustable bracket and adaptor sleeves for the exhaust manifolds. Other exhaust silencers available, please press More info for further details. Sold as a pair

£89.99

Top quality stainless steel set of exhaust silencers as fitted to /6 &/ 7 Series (38 or 40mm). Manufactured here in UK to the highest standards, it carries a 10 year guarantee, fits exactly as the original items with no modifications to mounting brackets,carburation or ignition. Noise output is comparable to the original silencers. They are polished to a mirror finish which has a close resemblance to chrome plating. Sold as a pair. Please state your bike's model and year when ordering.

£319.99

High quality set of brightly chromed exhaust silencers as fitted to /6 &/ 7 Series, built exactly as per the original dimensions and specifications. Fits exactly as the original items with no modifications to mounting brackets,carburation or ignition. Noise output is comparable to the original silencers. Sold as a pair. Please state your bike's model and year when ordering.

£144.99

Hi performance conical air filters, indicated for tuned up engines with power at higher rpm (peaky cams). Cotton filter gauze with chrome finish, washable and reusable. Available for 32, 38 and 40mm, Bing and Dell'Orto carbs. Other sizes available upon request. Sold here per pair.

£29.99