Fuel Injectors & RST Throttle body

Aprilia Caponord ETV1000 Rally-Raid RST Futura throttle body rebuildSometime way-back-when, I bought a used set of throttle bodies off an RTS Futura (51mm v Caponord 47mm) with the view of doing some tuning/comparison work on the Raid with the 3D printed hybrid velocity stacks (51mm diameter but Caponord height). What really happened though was far less glamourous and only involved a sturdy box and a shelf! But about a month ago I dug them out again and realised that I pretty much had all the ingredients required to do a full clean and rebuild. I had stainless steel 4x10mm and 5x12mm Torx screws on the shelf as well as all necessary seals. The ultrasonic cleaning bath would do the brunt of the work and I could send the injectors away for professional cleaning at a reasonable cost.Aprilia Caponord ETV1000 Rally-Raid RST Futura throttle body rebuild

And so, with a plan to hand, apart it came. First the injectors were sent away for cleaning. The turn-around was quick and the total cost was about £30 including P&P. Thankfully both injectors got a clean bill of health. Next, the throttle body and associated parts went into the ultrasonic cleaning bath. I had bought the 6L version …. but when you take into account the smaller basket inside, the usable capacity is probably something more like 4 – 5L … just enough luckily, for the throttle bodies. If I was in the market for another one, I’d definitely opt for the 10L or maybe even try to stretch to the 15L for good measure.Aprilia Caponord ETV1000 Rally-Raid RST Futura throttle body rebuild

It was amazing the amount of debris that came out of them … in the end they looked almost brand new again! The rebuild was very straight forward with all new ‘O’-rings and screws used. Pleased? Yes I think so. They are refurbished and ready for action which is the important thing. The only downside is that some of the mild-steel components are still showing a patina of rust. It would have been nice to re-plate them to give them that as-new look as well. For now I’ve cleaned off what I can and coated the parts for protection, but one day I’d like to have a crack at home plating … zinc, nickel or passivate of some sort might be interesting.  Aprilia Caponord ETV1000 Rally-Raid RST Futura throttle body rebuild

Parts used:

2x   4x10mm Stainless Steel Torx screws

4x  5x12mm Stainless Steel Torx screws

4x  10mm OD 2mm section Viton O-rings

2x  14.1mm OD 2.4mm section Viton O-rings

2x  BS203 O-rings

1x  BS008 O-ring

Just throwing it out there ……. If I were to offer these out as a bagged kit, would anyone be interested?