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S&S CYCLE Big Bore Kit - 90.00 mm - 865 cc - Royal Enfield 650 Twin

S&S CYCLE Big Bore Kit – 90.00 mm – 865 cc – Royal Enfield 650 Twin

$ 849.95

In stock

Big Bore Kit – 90.00 mm – 865 cc – Royal Enfield 650 Twin

Part #: 09040054

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S&S CYCLE Big Bore Kit – 90.00 mm – 865 cc – Royal Enfield 650 Twin

Additional information

Weight 6.65 lbs
Part Number

09040054
Punctuated Part Number

0904-0054
Vendor Part Number

9200145
Vendor Punctuated Part Number

920-0145
Commodity Code

0904
Commodity Group

ENGINE GROUP
Commodity Type

ENGINE PERFORMANCE KITS
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Product Description

S&S CYCLE Big Bore Kit – 90.00 mm – 865 cc – Royal Enfield 650 Twin

Key Features

  • Increases bore from stock
  • Increase compression ratio from 9.5:1 to 11.0:1
  • Kit includes cylinder sleeves, pistons and head gasket
  • Made in the USA

Technical Specifications

  • Weight: 6.65 lbs
  • Supplier Number: 920-0145
  • Unit of Measure: Kit

Current Warehouse Inventory

Stock by Location:

  • ✓ Janesville, WI: 9 units
  • ✗ Batavia, NY: 0 units
  • ✗ Dallas, TX: 0 units
  • ✗ Fresno, CA: 0 units
  • ✓ Reno, NV: 1 units
  • ✗ Asheville, NC: 0 units
  • ✓ National: 10 units

Total Available: 20 units

Inventory Last Checked: December 4, 2025 at 1:00 AM UTC
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Thank you for Shopping at Knobtown Cycle!

When you shop with us, you’re not just buying motorcycle parts — you’re supporting a small, family-run business rooted right here in the heartland of America. Every order helps us keep riders on the road and fuels our passion for serving the motorcycle community.
From all of us at Knobtown Cycle, thank you for choosing local and riding with us.

Kit Fox – Owner Knobtown Cycle

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