Motorcycle carburettors:    Dellorto

Dellorto Motorcycle carburettors (Picasa Gallery - opens in new window)

Dellorto motorcycle carburettors differ in many respects from the more common Japanese instruments that abound these days. Dellortos do require extra care and attention if the performance that they are capable of producing is to be realised.

Both Comprehensive Overhaul (CO) and Restoration services are detailed below, as are turnaround times and costs. Some general information is also supplied.

Finally, JRS has offered this mail order service for a number of years to customers from the UK, EEC and N America.

Comprehensive Overhaul (CO):

Where operational efficiency is what matters, this is the service that will provide it.

Fuel residues build up in all carburettors over time. The result is that the effective diameter of all components, jets, atomisers, fuel passageways and air bleeds reduce. In cases where fuel has been left in them for a prolonged period, carburettors will become completely fouled up and pump diaphragms will often be terminally damaged. The end result of all or any of the above is that the units fail to function properly(or at all), the engine is not fuelled as it should be, performance suffers and so does the pleasure and enjoyment of riding the bike.
This JRS/UCC service is designed to return carburettors to optimum operational efficiency. The methods used are completely harmless and no acids or other aggressive chemicals are used.

Method:

Carburettors are washed to remove external dirt and oil. Each carburettor is then dismantled completely. All components are cleaned and rinsed in ultrasonic baths. Following forced air drying and static fuel and air circuit testing, components are closely inspected and the customer’s attention is drawn to any parts that may need replacement The carburettors are then carefully reassembled and the correct float heights built in. Where fitted, accelerator pumps are recalibrated using Dellorto approved equipment (accurate to 0.1cc), to manufacturer’s original settings. In multi carburettor assemblies eg Laverda triples, the bank of carburettors is reunited and then visually synchronised. The work is then carefully repacked and returned to the customer, usually via insured carrier service, accompanied by a letter detailing the work completed and giving a general report and enclosing notes in carburetor related matters.

Restoration:

Where appearance and originality are as important as operational efficiency, this restoration service is absolutely ideal and probably the best value for money currently available

Method:

This is an extension of the cleaning process detailed above. In addition to the above, selected components are re-engineered (via bead or vapour blasting) to remove all corrosion before being cleaned and rinsed for a second time. There is no effective material change to any of the engineered tolerances in the carburettors.
Alloy cast components such as carburettor bodies appear “as new” and where components were originally bright finished as is the case with some float bowls and tops, these are mirror polished.
External brass components are re-polished and steel fixings are stripped, linished, polished and replated in BZP.

Other than the re-plating, all of the process is completed in house.

Turnaround

Comprehensive overhaul: 10-15 working days.

Restoration:  10/20 working days.

In all cases delivery times are advised at the time you place your work

Carriage:

UK based work will leave JRS for delivery the following day. Goods will need to be signed for. Other work will be returned, as agreed with the customer.

Costs

Comp. overhaul (cleaning, rebuild, pump recalibration etc): £65 per carburettor
Gasket sets: £10 per carburettor
Return carriage £10 per consignment

Restoration:  £80 per carburetor

Gasket sets: £10 per carburetor

Replating: preparation and replating in BZP:  £45 per consignment
Cavis fuel hose: from £10 per metre fitted.
Return carriage £10 per consignment

Parts:
A Dellorto rebuild kit (costed above)  should be considered an essential part of any rebuild/restoration, and in all cases, customers will be advised should any parts need replacement. This allows the customer to agree the replacement (or not) and maintain control over the final specification and cost.

JRS/UCC offer an engineering approach to carburettor cleaning and restoration: years of experience in motorcycle restoration, industrial quality ultrasonic and surface engineering equipment, time proven systems, enviable reputation for service and workmanship and value for money.

If you wish to use any of the JRS services, or require further information please contact Mike Davies at JRS on (UK) 01792 402458 or email: jrs@jrs.uk.com