635 H.O. Gear Drive Camshaft Kit

S&S CYCLE 635 H.O. Gear Drive Camshaft Kit

S&S CYCLE
0925-0838
330-0335
Upgrade your engine's performance with the 635 H.O. Gear Drive Camshaft Kit, designed for modified engines with higher displacement and compression ratios.
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€640.39
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  Delivery policy

In stock items will be shipped within 1-3 days.

  Return policy

You can return the products within 14 days for a full refund, check our returns policy.

635 H.O. Gear Drive Camshaft Kit

Enhance your engine's performance with the 635 H.O. Gear Drive Camshaft Kit. This innovative kit reverses the rear cam's direction of rotation, allowing for additional operating clearance between cam lobes. As a result, higher cam lifts are achievable, making it perfect for modified engines with a displacement of 106" or greater and compression ratios between 10.0:1 to 11.0:1.

Key features include:

  • Increases valve and timing accuracy by eliminating timing chain lash and loosely-fit stock chain drive.
  • Compatible with stock, unported heads; however, S&S CNC ported heads are recommended for optimal performance.
  • Requires material removal from the inner surface of the stock gear cover for installation.
  • Installation requires a hydraulic press and other professional-level tools.
  • An adjustable pushrod/cover kit must be used.
  • New cam bearings and gaskets must be installed when fitting new cams.
  • Best power range from 3000-6000 rpm.
  • Note: This is not a bolt-in camshaft kit.

The kit includes camshafts, inner gear, outer gear drives, inner bearings, outer bearings, gaskets, and detailed instructions. Please ensure to check coil bind, valve to valve clearance, and valve to piston clearance during installation. Due to the inherent characteristics of gear drives, you may experience increased valve train noise. Proudly made in the USA.

: 0925-0838
In Stock

Data sheet

Riding Style
Street
Type
Gear
Units
Kit
Color/Finish
Raw
Application
Exhaust
Intake
Intake Lobe Centerline Imperial
102°
Exhaust Duration Imperial
276°
Intake Duration Imperial
243°
Exhaust Lobe Centerline Imperial
100.5°
Exhaust Lift Imperial
0.635"
Exhaust Open Imperial
58.5°
Exhaust Lift at TDC Imperial
0.284"
Intake Open Imperial
19.5°
Exhaust Close Imperial
37.5°
Grind
635HO
Intake Close Imperial
43.5°
Intake Lift Imperial
0.635"

Shipping Policy

Shipping Areas:

We ship to:

  • Spain (Peninsula and Balearic Islands)
  • European Union countries

We do not ship to the Canary Islands, Ceuta, or Melilla.

Shipping Times:

  • Spain (Peninsula): 2–4 business days
  • Balearic Islands: 3–5 business days
  • EU countries: 3–7 business days depending on destination

Shipping Costs:

Shipping costs are calculated automatically at checkout based on destination and weight.

Free shipping may be offered for qualifying orders, as specified on our website.

Order Processing:

Orders are processed within 1–2 business days after payment confirmation. Orders placed on weekends or public holidays are processed the next business day.

Delivery Issues:

If your order is delayed or arrives damaged, you must notify us within 14 calendar days. We will investigate the issue and offer a resolution in accordance with applicable consumer protection laws.

Return & Withdrawal Policy

Right of Withdrawal:

In accordance with Royal Legislative Decree 1/2007 (Ley de Defensa de los Consumidores y Usuarios), you have the right to withdraw from your purchase within 14 calendar days from the date of receipt, without giving any reason.

To exercise this right, contact us via email or through our website, providing your order number and contact details.

Return Conditions:

  • Products must be unused, in original condition and packaging.
  • Return shipping costs are the responsibility of the customer, unless the product is defective or sent in error.
  • Refunds will be issued within 14 days of receiving the returned goods.

Items Excluded from Return:

  • Custom or personalized products
  • Sealed items that were unsealed after delivery and are unsuitable for return due to hygiene (e.g. cosmetics, personal care)
  • Digital content delivered electronically once download or streaming has begun

If you want to return an item, please contact us first to give you detailed instructions.