Custom Tail Loops & Seat Bases,
Matched to Your Subframe

Rear loops, seat pans and subframe adapters for retro and cafe-racer builds — shaped to the frame you have, not to a generic kit.

Send Your Specs See How It Works

Your subframeSeat pan to your shapeAnodised or bareLaser-markedDDP 15+ countries

What We Can Change

Six things that make the part yours instead of a catalogue item.

Custom Tail Loop & Seat Base, detail view

Loop width & drop

Shaped to the frame rails you are working with.

Seat pan outline

To the seat you have, or the one you are having made.

Mounting tabs

Placed where your subframe already has fixings.

Shock & battery clearance

Checked before anything is cut.

Upholstery reference

Pan edges left square for your trimmer.

Finish & marking

Anodised or left bare, your logo laser-marked.

What We Need From You

The part and the build — make, model and year, and what it is replacing.
The drawing — 2D PDF or 3D STEP/IGES. We ask for it by email after your enquiry.
Material — Aluminium as standard; steel where the part needs it.
Finish and branding — the colour you want, and the logo file to be marked.

You do not upload anything to start. Send the requirement through the enquiry form; we reply by email and ask for exactly the files we need — nothing more.

The Measurements Worth Having Before Anything Is Cut

A tail loop is a one-way operation on most frames. These are the numbers to have in front of you before the saw comes out.

1. Where the rails end nowTube outside diameter and the cut line, measured from something that will still exist afterwards - the shock mount or the swingarm pivot - not from the tail itself.

2. The seat, or its bolt patternPan outline, fixing positions, and the height the trimmer needs underneath. A pan drawn from a photograph is a pan that comes back.

3. What has to live under the loopBattery box, ECU, regulator, harness takeoffs. Loop width is usually set by the widest of those, not by the tyre you want to show off.

4. Shock and spring clearanceCheck it at full compression, not at ride height. The loop and the pan cannot occupy the space the spring needs to travel through.

5. Tail light, plate and indicatorsSettle the rear-end layout now. Bosses added after the part is machined mean machining a second part.

If you already have the seat, send it or trace it. The pan outline is the one dimension that cannot be argued with later, and it is the cheapest thing to get right before the frame is cut.

Your Drawing Becomes the Part

This is the only thing we need to quote: the geometry. Everything else we settle with you by email.

You send the drawing

A 2D PDF or a 3D STEP/IGES, plus the frame rails and the seat.

We review and quote

Per drawing and quantity, with tooling listed as its own line if a process needs it.

Paid sample, then production

A sample at full rate, not credited against the order. Then batch production and DDP delivery.

Finish Is Your Colour

Typical anodising shades below. The final batch is matched to the reference you send us.

Blackmost requested

Clear / Silvernatural

Hard Blueanodised

Redanodised

Goldanodised

Greenanodised

Gunmetalanodised

Bespokematched to your reference

Four Steps From Spec to Delivered Part

Send your requirement

The part, the build, the material and the finish. No upload needed to start.

We ask for the drawing

2D PDF or 3D STEP/IGES by email, plus the fitment details.

Quote, then a paid sample

Priced per drawing and quantity. The sample is charged at full rate and is not credited against the order.

Production and delivery

Batch production, laser marking, DDP door-to-door.

What we will not do

We do not reproduce original equipment parts and we do not copy factory appearance. Every part is a generic structure built to your own design. Before production starts we ask for trademark authorisation for your mark and a non-infringement undertaking. No Mosvolt branding appears on the finished part.

Tail Loop & Seat Base Quick Answers

Yes. Send the frame rails, the seat you plan to run and how much drop you want at the back; we shape the loop and the pan to that. It is not a generic kit — the geometry comes from your frame. Submit the requirement and we ask for the drawing by email.

A 2D PDF or a 3D STEP/IGES. Submit the enquiry first and we will ask for the drawing by email — you do not need to upload anything to get a quote started.

Aluminium as standard, steel where the part needs it. Anodised in a colour matched to your brand where the material allows, with your logo laser-marked on the part.

Where a process does require tooling, it is quoted separately as its own line — never bundled into the unit price.

Priced per drawing and quantity — there is no list price for custom geometry. A sample is produced and charged at full rate, and it is not credited against the production order.

No. We do not reproduce original equipment parts and we do not copy factory appearance. Every part is a generic structure built to your own design, and we ask for trademark authorisation plus a non-infringement undertaking before production starts.