The facts.
| Part number | G9111 |
|---|---|
| Type | Bent pipe |
| Material | AISI 304 stainless steel |
| Spark weight | 0.2 kg |
| Dimensions | 45°, Ø 60 × 1.0 mm |
| Fitment | Universal |
| Road approval | None — track use only |
| Origin | Made in Italy |
| Manufacturer | Spark Exhaust Technology, Mantova |
| Manufacturer description | Bended tube 45° - d.60 x 1,0mm |
DescriptionThe whole story▼
Sixty millimetres at forty-five degrees. The diameter Spark's own universal silencers take, in the angle that gets a run to them.
Key Features
- Mandrel-formed 45° bend, AISI 304 stainless steel.
- Ø 60 mm outside, 1.0 mm wall thickness.
- Matches the inlet of Spark's universal Force Evo, Konix Evo, Grid-O and Megaphone silencers.
- Matches Spark's 60 mm straight tube, article G9004.
- Spark part number G9111, made in Mantova, Italy.
Over the Swingarm
A silencer mounted high and to the rear needs the pipe to climb, and the climb has to start after the swingarm pivot and finish before the shock. Forty-five degrees is the standard first move: steep enough to gain height in the space available, shallow enough that the sweep still clears the pivot.
The second forty-five levels the run out at silencer height. Between them they are most of an underseat or high-mount route.
Sweep Radius at Sixty
Centreline radius grows with diameter, so a sixty millimetre bend takes noticeably more room than a forty at the same angle. On a build where the pipe passes between the swingarm and the frame, that extra sweep is usually the constraint — and it is easier to discover on paper than with a saw.
The Spark Silencer Diameter
Sixty millimetres is the inlet of the universal Force Evo G00SI23T, the Konix Evo G00SI25T, the Grid-O G00SI26T and the Megaphone cases. A run built in this size arrives at a Spark silencer without an adapter, which removes both a part and a joint from the system.
Handling a Large Thin Bend
One millimetre of wall at sixty millimetres dents from a dropped tool and goes oval under a vice. Support it along its length when cutting and clamp only on the straight tangents.
Purge, Properly
A large-bore curved joint takes longer to fill with argon than a small straight one, and a bend can hold a pocket of air at its high point. Give it more time than feels necessary — oxidation inside a bend cannot be seen and cannot be dressed out.
Ordering
One bend per article. Spark builds 30°, 45° and 90° at sixty millimetres.
FitmentWhich bikes this fits▼
Universal product — Please check whether it fits your bike.
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