RG Racing Limited


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Castrol Motorcycle Gear Oils

Normal sales to UK ONLY MAINLAND ONLY. For BT / IOM / IOW and Northern Ireland postcodes please call.  We do not ship to EEC /  EU Countries

All Prices are less Shipping and VAT

Castrol MTX 80w Part Synthetic Gearbox Oil 1Ltr

  • Castrol MTX Part Synthetic motorcycle gear oil is a synthetic based transmission oil designed to enhance the performance of the latest generation of on and off road motorcycles. 
  • Castrol MTX Part Synthetic motorcycle gear oil is suitable for use in high performance on and off road motorcycles where a dedicated transmission oil is required. 
  • Castrol MTX Part Synthetic motorcycle gear oil is also suitable for use in 2 stroke motorcycles and scooters with separate manually operated gearboxes.
  • SAE80W (Usable in karts) 
  • API GL-4





Castrol MTX 10w40 Gearbox Oil 1Ltr.

  • A mineral based multi-grade motorcycle transmission oil designed for all on and off road 2-stoke bikes.
  • It is suitable for manually operated or automatic gear boxes with or without wet clutches.
  • This oil should be used where a multi-grade oil (eg. SAE 10w 30 or 10w 40) is recommended by manufacturers.
  • SAE 10W/40, API SG, SF, SE
  • Comes in 1ltrs or drums



MTX 10w40


Castrol MTX Full Synthetic 75w140

Fully synthetic transmission lubricant for 2T and 4T On and Off-Road motorcycles. Suitable for use in high performance 2T and 4T transmissions with wet or dry clutch systems and for final drives.


  • 75W-140
  • Motorcycle Gear and final drive oil.
  • Grand Prix Series.
  • For 2T and 4T high performance motorcycles - suitable for wet and dry clutch systems.

We only sell this at case level when available - Please contact us.






Send mail to team@rgracing.co.uk with questions or comments about this.
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