DESCRIPTION
Spectro 85W-140 GL-5 Heavy Duty Gear Guard Oil is a premium-quality gear lubricant specifically formulated for motorcycle transmissions, particularly Harley-Davidson® Big Twin models. Designed to provide outstanding protection under extreme loads and temperatures, this heavy-duty gear oil helps reduce friction, minimise wear, and extend transmission component life.
Its advanced formulation protects against rust, corrosion, oxidation, foaming, and gear pitting while maintaining a strong lubricating film under demanding operating conditions. The high-viscosity 85W-140 formula delivers exceptional protection in high-temperature environments and heavy-load applications, making it ideal for touring motorcycles and high-torque V-Twin engines.
Dyed red for easy identification, Heavy Duty Gear Guard Oil exceeds known OEM and Harley-Davidson warranty requirements and provides reliable protection for long-term transmission performance.
~ Premium heavy-duty motorcycle transmission gear oil
~ Specifically formulated for Harley-Davidson Big Twin transmissions
~ SAE 85W-140 viscosity grade
~ API GL-5 rated
~ Protects against rust, corrosion, oxidation, and foaming
~ Helps prevent gear pitting and component wear
~ Reduces friction and power loss within the transmission
~ Extends gear and bearing life
~ Provides exceptional lubrication under extreme heat conditions
~ Maintains strong film strength under heavy loads
~ Dyed red for easy identification
~ Exceeds known OEM and Harley-Davidson warranty requirements
~ Quality Spectro lubricants supplied by Motozone
Features
~ Heavy-duty GL-5 gear oil formulation
~ Advanced anti-wear and extreme-pressure protection
~ Excellent oxidation and corrosion resistance
~ High-temperature stability
~ Reduces drag and friction losses
~ Designed for demanding V-Twin transmission applications
Specifications
~ Product Type: Gear Oil
~ Viscosity Grade: SAE 85W-140
~ API Rating: GL-5
~ Colour: Red
~ Application: Motorcycle Transmissions
~ Base Type: Premium Gear Lubricant
Important Information
~ Suitable for transmissions requiring API GL-5 gear oil.
~ Always refer to the motorcycle manufacturer's recommendations for correct lubricant specifications and service intervals.
~ Exceeds known OEM and Harley-Davidson warranty requirements.
Whether you're touring long distances, riding in hot conditions, or maintaining a high-torque Harley-Davidson Big Twin, Spectro 85W-140 GL-5 Heavy Duty Gear Guard Oil delivers the protection and durability needed to keep your transmission operating smoothly.
At Motozone, we supply quality Spectro oils, lubricants, service products, and motorcycle maintenance solutions trusted by riders throughout New Zealand. Protect your transmission with the proven performance of Spectro Heavy Duty Gear Guard Oil.
SHIPPING
SHIPPING
Orders can be shipped from either Auckland, Hamilton, Kihikihi, New Plymouth, Wellington or Christchurch warehouses. Depending on the location of items you have ordered, Motozone will ship your purchase from the closest location where possible.
New Zealand
Free shipping on order over $199.00.
For orders under $199.00, shipping throughout New Zealand is $7.99 for Urban and $12.99 for Rural Shipping.
In most cases shipping is overnight however it can take 2-3 days depending on time/day the order was placed. If delivery is to a rural address please allow a couple of extra days. We can ship to your place of work!
Australia
Free shipping on order over $199.00.
For orders under $199.00, shipping throughout Australia is $19.99
Delivery takes approx. 5-10 days delivery.
RETURNS
RETURNS
Any goods purchased from Motozone can be returned within 30 days of receipt for refund or exchange.
The goods must be returned new, unused, unaltered, not previously installed, and in a sellable condition with all of the original packaging.
This right of return will not cover items that are special orders and found to be an incorrect fit, this is the responsibility of the purchaser, however all other standard warranties will apply.
Freight costs will not be refunded.
For the returns process contact or phone Motozone with your invoice number and the reason for return. We will then email you the correct form for processing.