GU01161331, Reduction, Aprilia, Derbi, Moto Guzzi, Vespa, Gilera, Piaggio
Guaranteed
Genuine
Piaggio
Parts
The Reduction is number 10 in the part drawing below.
The Reduction is number 11 in the part drawing below.
The Reduction is number 13 in the part drawing below.
Please note this part replaces the following parts:
000011613310, 11613310
- Brand(s):
- Aprilia, Derbi, Moto Guzzi, Vespa, Gilera, Piaggio
- Part number:
- GU01161331
- Description:
- Reduction
- Stock Availability:
- If your part is not in stock, it will take 3-5 days to reach MSP
Price: EUR 18.76 inc. VAT
Unsure if it’s the right part?
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Got the parts with no issues
john gillick
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Good site easy to manage
Max Baker romax
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Good service
Baz
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Exellent! I have done 2 trades with MSP, no problems good comunication and quality parts.
Gaute
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I found everything I needed at the dealer. You can also get a discount
Andrejs Zonbergs
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Quick delivery.spot on.
john haswell
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Every time, everything perfect!
Christos Petropoulos-trakas
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The parts arrive quickly and on time, they fit perfectly. And it's very convenient that there is a detailed drawing to help you figure out exactly what you're looking for.
Иван Желязков
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Easy to navigate website & reasonable postage considering delivery from the Netherlands to UK. Found what I needed for my 22 year old GSXR. Would definitely use MSP again
Stevie G
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The right parts and fast delivery
Göran Persson
The Reduction is a genuine spare part manufactured by Piaggio so you have peace of mind the Reduction part being sold by Motorcycle Spare Parts is both original and new.
Used in the blow-by/ventilation hose routing on multiple big-block platforms, GU01161331 is the OEM “Reduction” fitting specified across a long list of Moto Guzzi models (2002–2018), and it supersedes 000011613310 / 11613310 in parts catalogues. It’s the correct adaptor/restrictor piece when a breather joint has been damaged, hardened, or no longer seals.
Because this part lives in oily vapor flow, sealing surfaces and hose condition decide whether it works properly. Replace any heat-cycled hoses at the same time, and confirm the downstream separator/airbox spigots are clean so crankcase pressure control isn’t compromised by partial blockage.
