The spark plugs for motorcycles and scooters have to endure extreme conditions voltages in excess of 30,000 volts, temperatures above 1000° and chemically corrosive environments, with very high pressures involved . The range offered by Bosch is extensive and appropriate to working on two wheels, and the application is simplified thanks to the electrode gap preset at the factory.

In the race, a motor runs for more than 80% at full throttle position and, therefore, the spark plugs  are specially designed to meet the specific demands that result from this condition.

The use everyday instead involves continuous goodwill , stop and go driving in traffic and even long journeys. The Bosch spark plug is designed precisely to respond adequately to all of these operating variables always ensuring:

– High resistance to wear

– Quick self-cleaning for safe ignitions

– Protection of the engine and the catalytic converter

– Immediate Starts

Please click here to go direct to the spark plugs

If we do not have the type you need, please ask, we may be able to supply it.

Trade enquires welcome.

With these adaptors it is possible to use aircooled type 3 manifolds on the waterboxer engines, allowing the use of twin carburettors and hexbar or bellcrank type linkages.

The type 3 manifolds will allow the use of Weber ICT or IDF or Dellorto DRLA carburettors and give adequate clearance for short air filters.

Made exclusively for us to our design in the UK from aluminium.

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Top quality UK machined from 1 piece alloy trumpets.

30 & 50mm long.

Available to fit 40 & 45/48mm carburettors.

Will fit:-

Dellorto DHLA
Weber DCOE ( Bolt on type )
Solex, SK and DCOW
Throttle bodies with 65mm stud centres.
Maximum diameter at flared end 79mm.

Please see individual items for full details.

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We have 4 sizes,

30mm & 60mm long for DCOE 40s & 30 & 60mm long for DCOE 45s.

Please click here to go to the Trumpet section.

Its is the same fitting as the longer 60mm M42x1.25 mm male thread.

The length of the trumpet is 30mm + 18mm for the rounded gauze, with a maximum diameter of 75mm at the flared end.

Click here to go directly to the trumpet in our web shop PHBH-30 or click here to browse the entire trumpet section.