Four Bank Roundslide & CV Carburettors Rebuild Service
Four carburettors. One engine. Every cylinder needs a consistent supply of fuel.
Our Four Carburettor Clean & Rebuild Service is designed to restore reliable operation and consistent fuel delivery across the entire bank. Ideal for inline-four motorcycles, superbikes and classic sports machines, this service combines professional ultrasonic cleaning, precision setup and a quality rebuild of all four carburettors.
Upon arrival, the complete bank is inspected before each carburettor is dismantled and correctly prepared for cleaning. All four undergo a full professional ultrasonic clean before being rebuilt using FKM (Viton) seals and UK manufactured jets where necessary. An upgraded DynoJet rebuild is also available upon request for compatible applications.
Every stage of reassembly is carried out with attention to detail. Float heights are accurately set to the manufacturer’s specifications, float valve seals are pressure tested, and all four carburettors are professionally bench synchronised. Idle mixture screws are set to the manufacturer’s recommended manual settings, diaphragms are vacuum tested where applicable, and fuel rails and float bowls are leak tested.
Following reassembly, the complete bank receives a final inspection. Before and after photographs document the work carried out, and the finished carburettors are securely packaged and returned using Royal Mail or DPD next-day delivery.
Important Information
This is a functional service, not a cosmetic restoration. Your carburettors will be thoroughly cleaned internally and externally, but existing corrosion, discolouration, pitting and age-related wear will remain unless additional cosmetic work is requested.
If seized mixture screws or jets are encountered, extraction is charged at £30 per screw. Due to the precision required for safe removal, this may extend the estimated turnaround time.
Optional Cosmetic Services
For customers who want to go beyond functional restoration, we offer vapour blasting, stainless steel nut and bolt replacement in Allen key or JIS styles, professional polishing and painting, butterfly valve polishing, professional hose replacement and complete rust removal.
For the complete cosmetic and mechanical transformation, explore The Showroom Package.
Upgraded DynoJet Rebuild
Before requesting an upgraded DynoJet rebuild, please ensure DynoJet manufactures a suitable kit for your motorcycle’s make and model using the link provided on our website.
Turnaround Times
Standard Service: 7–14 business days.
Express Service: £50 supplement for a 5–7 business day turnaround.