Powered by ™ Translate

Bel-Ray Specialty Lubricants: Tech Notes, Vol 4, Issue 7

October, 2013


Motorcycle Multi-disk Wet Clutch Performance

Motorcycles are limited on the size of the clutch that is used to transmit the power of the engine to the transmission and then to the rear wheel. This limited size of the clutch is the reason the clutch is designed with multiple disks. The design of wet clutches utilizes friction disks and plain steel disks alternately stacked one against the other running in oil. The designers realize the disks are going to slide against each other, which is why there are so many of them. By multiplying the driving friction of the sliding disk sets the number of sets needed to transmit the torque of the engine can be determined. The fluid that is used to lubricate and cool the sliding clutch disks is very important. To obtain the maximum amount of torque from the clutch disk interfaces you need a lubricant that will allow the clutches to slide an acceptable amount and keep the clutch disks cool enough so they will not warp. For unit constructed motorcycles, the rating that references the performance of torque the fluid will allow is the JASO rating. Bel-Ray Motorcycle 4T Engine Oils are rated JASO MA2 which is the highest performance rating for 4T engine oils. You can be assured you will get the maximum clutch performance using Bel-Ray Motorcycle 4T Engine Oils.

The Bel-Ray Performance Products to use for wet clutch transmissions that use separate oil for the engine and separate oil for the wet clutch and transmission are; Bel-Ray Gear Saver Transmission Oil 75W (99240), 80W (99250), Bel-Ray Thumper Gear Saver Transmission Oil 80W-85 (99510). These transmission oils are specifically formulated for wet clutch performance. The 75W Transmission Oil has a similar viscosity compared to SAE 5W-20 motor oil and is recommended in smaller, less than 100cc, motorcycles. The 80W Transmission Oil has a similar viscosity compared to SAE 10W-30 motor oil and the Bel-Ray Thumper Gear Saver Transmission Oil 80W-85 has a similar viscosity compared to SAE 10W-40 motor oil. Many OEM manuals use SAE motor oil viscosity designations as the indicator of what transmission oil viscosity to use.

Bel-Ray Primary Chaincase Lubricant (96920) is the performance product recommended for the Harley- Davidson Big Twin motorcycle Primary. The Bel-Ray Primary Chaincase Lubricant provides excellent clutch performance and eliminates clutch chatter and clutch wear.

Harley- Davidson Sportster wet clutch and transmissions require a heavier transmission fluid to provide protection for the gears and bearings. The Bel-Ray Sports Transmission Fluid (96925) is the performance product we recommend for this application.

Bel-Ray Performance Lubricants are formulated to provide the maximum clutch torque possible for your application. Check out the Bel-Ray website at and go to the Lubricant Advisor for the Bel-Ray Performance Lubricants for your bike or ATV.


Change Management Plan — Optimize Benefits of Bel-Ray Performance Lubricants

When introducing a Bel-Ray Performance Lubricant on a piece of equipment or new application, you need this process to be as seamless and painless as possible. This is easily achieved by utilizing a number of guidelines and performing risk assessments to create a Change Management Plan.

A Change Management Plan may be broken down into several steps that create a logical process for implementing Bel-Ray Performance Lubricants. Bel-Ray Company has developed detailed and comprehensive Change Management Plans to suit all applications in the mining industry.

The following is a brief overview of some of the key elements needed to develop a successful Change Management Plan.

Initial Scope - Identify the key stakeholders that will be responsible to manage the Change Management Plan. This team should be a combination of site personnel (including Maintenance, Procurement, Production, etc) and Bel-Ray Technical Representatives. An external service provider should also be included in this team when they have direct involvement with the equipment. Communication between all stakeholders is the key to a successful change.

Identify the reason to introduce a Bel-Ray Performance Lubricant and its benefits. This can be based on one or more of the following:

  New business
  Life Cycle Cost Savings
  Equipment performance improvements
  Lubricant rationalization
  Existing lubricant is not suitable for application (OEM specs)

Assessments and Planning - Review OEM specifications and confirm if the Bel-Ray Performance Lubricant is suitable for the equipment or application. During this process, if a change from OEM specification has been made, it is important to understand and document why.

Perform an audit on the equipment and review these findings. This step should also involve reviewing the operating conditions to identify other potential issues. If the Bel-Ray Performance Lubricant is to be used across multiple applications, identify any critical areas and perform a risk analysis on any areas of concern.

If required, perform compatibility testing if other lubricants are involved. The compatibility review can also consider case studies and previous field experience.

If applicable, review any historical oil analysis reports to assess the equipment condition. It may be necessary to take a sample prior to introducing the Bel-Ray Performance Lubricant to set a base line for future reports.

Review Stock and Delivery Requirements
If a trial is deemed necessary, expectations and outcomes shall need to be defined. A trial can be considered in cases such as:

  Product is used on critical equipment or a wide range of applications
  Compatibility concerns with new product
  Potential measurable performance benefits from new product

Implement the Change - Perform a trial prior to the full implementation of the Bel-Ray Performance Lubricant.

During the initial implementation stages, the Bel-Ray Technical Representative shall attend review meetings, scheduled

 inspection days and familiarize / train operations and maintenance personnel on the correct application process for the Bel-Ray Performance Lubricant.

Adjust the rate of consumption where needed (in measured amounts) to optimize the benefits of using a Bel-RayPerformance Lubricant.

Review Implementation
Review all of the technical reports and recorded data, recommendations and feedback as required.

By developing a detailed and comprehensive Change Management Plan, Bel-Ray Company has successfully introduced Bel-Ray Performance Lubricants across a variety of applications.

Contact your Bel-Ray Mining Representative to assist you in implementing a Change Management Plan and upgrade to Bel-Ray Performance Lubricants.


Health and Safe Handling of Lubricants

Bel-Ray lubricating oils and greases are generally safe. However, as with all petroleum products, excessive or prolonged skin contact, eye contact, ingestion or inhalation may have adverse effects. Material Safety Data Sheets and Product Data Sheets should be available and reviewed by everyone using and or receiving lubricants.

General guidelines to follow are:

  Observe all safety regulations, hygiene and housekeeping rules.
  Observe and follow all package labels, MSDS (material safety data sheets) and PDS (product data sheets).
Wash hands and exposed skin with soap and water after handling.
  Clean up all spills immediately and dispose of according to environmental guidelines. The use of Non-Slip paint/floor sealant can prevent accidents.
  Do not use gasoline or solvent to clean or remove oil and grease from skin.
  Know where to find first aid and the eye wash system.
  Remove oil soaked clothing.
  Pay close attention to flash and fire points, see MSDS and PDS. Avoid storage near any heat source. Pay close attention to aerosol flammability guidelines.
  Place a Co2 or Foam type fire extinguisher in the lube storage area whether it is inside or outside storage. Do not spray water on an oil fire as the water can spread the oil and fire. Call Fire Department immediately.
  Post NO-SMOKING and other company SAFETY SIGNS in and around the lubricant storage and dispensing area. (for both new and used oil)
  Have one or more oil spill kits, booms, floor dry, gloves and safety glasses stored in a well marked area or cabinet. Be careful not to expose new oil to floor dry dust. A good quality Wet-Vac makes spill clean-ups quick and easy. Also keep a spill kit in the proximity of the used oil storage area.
  Do not store solvents and chemicals in the lubricant storage area. Solvents should rest on a grounded surface to prevent sparks and static electricity, ground wires should be used.
  All lubricant handling equipment should be tagged or labeled.
  Lubricant handling instructions should be posted on the wall of the storage area. All lube techs should be trained in safe handling and storage of lubricants.
  Have an Over-Pac drum and or a Spill Pallet ready for leak containment.
  Inspect pallets used for lubricant storage and transfer as there might be one or more nails sticking up that can puncture the bottom of a drum, keg, pail or case goods.
  Do not punch a hole in the drum for a vent, open the ¾” bung. Close bung after filling transfer container to keep contamination out. If the drum is drawn from regularly, install a small desiccant breather in the ¾” bung neck.