Bel-Ray Code: BR-99520-B4LW

Belray Thumper Synest 10W40 4Ltr

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Bel-Ray Thumper Racing Synthetic Ester Blend 4T Engine Oil combines the finest quality synthetic esters and mineral base oils specifically engineered for today’s 4-stroke single cylinder, multi-valve racing engines.  The oil provides maximum anti-wear protection for valve-trains, rings, cylinders and pistons.  It delivers maximum horsepower while providing consistent clutch performance.  Bel-Ray Thumper Racing Synthetic Ester Blend 4T Engine Oil exceeds API SM and JASO MA2 requirements.  The oil is suitable for air-cooled or liquid-cooled 4-stroke engines and wet clutches.Applications:
For use in all 4-stroke engines requiring an oil meeting the API SG/SH/SJ/SL/SM standards
For use in all 4-stroke motorcycles with or without wet clutches including those specifying the use of a JASO MA/MA1/MA2 qualified oil
Use in all 4-stroke motorcycle engines with or without wet clutchesFeatures and Benefits:
Superior anti-wear - Reduced cylinder and ring wear.  Longer bearing life.
Superior deposit control - Cleans deposits. Controls sludge and varnish formation.  Keeps ring lands and grooves free of carbon build-up.
High viscosity stability - The shear stability provides superior lubrication and film strength.  Minimizes friction for maximum power.
Smooth power transfer - Prevents clutch grabbing for an easily controlled and efficient gear shifting and clutch operation.General Description: Bel-Ray Thumper Racing Synthetic Ester Blend 4T Engine Oil is a premium multi-grade synthetic blend motor oil engineered for single cylinder multi-valve 4-stroke racing engines.  Bel-Ray Thumper Racing Synthetic Ester Blend 4T Engine Oil protects against viscosity breakdown under high temperature and high shear.
Product No.  99520  99530 
SAE Grade  10W-40  15W-50 
API Service Category  SM  SM 
JASO Performance Classification  MA2  MA2

Products marked as "In Stock" are stored in our different distribution centers. These products will ship within 1-3 business days.

Items are then sent by courier, we use Courierpost & Posthaste which will take 1-3 days to arrive depending on your location and the size of the parcel.

While we will do our best to ship from the distribution center closest to you, not all items will always be in stock in every location at all times.  In some cases we will split the order and ship each package out to you individually and in other cases we may need to consolidate the items in one location to ship out as one package.  We utilize our best judgment in an attempt to get the products to you as quickly as possible.

Our returns policy lasts 90 days. If 90 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

Additional non-returnable items:
- Gift cards
- Downloadable software products
- Some health and personal care items

To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.

There are certain situations where only partial refunds are granted (if applicable)
- Any item not in its original condition, is damaged or missing parts for reasons not due to our error
- Any item that is returned more than 90 days after delivery