851784, Engine Pin, Aprilia, Derbi, Moto Guzzi, Vespa, Gilera, Piaggio
Guaranteed
Genuine
Piaggio
Parts
The Engine Pin is number 1 in the part drawing below.
The Engine Pin is number 15 in the part drawing below.
The Engine Pin is number 17 in the part drawing below.
- Brand(s):
- Aprilia, Derbi, Moto Guzzi, Vespa, Gilera, Piaggio
- Part number:
- 851784
- Description:
- Engine Pin
- Stock Availability:
- If your part is not in stock, it will take 3-5 days to reach MSP
Price: EUR 26.02 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 Engine Pin is a genuine spare part manufactured by Piaggio so you have peace of mind the Engine Pin part being sold by Motorcycle Spare Parts is both original and new.
Accurate alignment between structural and engine-related assemblies often comes down to dowel pins rather than bolts, and engine pin 851784 is used across multiple Aprilia platforms including Shiver and Dorsoduro families and Caponord variants. Its role is to locate components precisely so bolt torque clamps correctly without shifting the joint.
Pins like this should seat fully and remain free of burrs; forcing a damaged pin can distort mating bores and create long-term alignment issues. During reassembly, clean the bores and check that the pin slips to depth without excessive play.
