High Volume Oil Pump XR50 CRF50 - Increased Lubrication + Big Bore Ready (1982-Present)
Keep Your Honda 50/70 Engine Alive — Especially With a Big Bore Kit
Stop starving your engine of oil. The stock oil pump on your Honda XR50, CRF50, XR70, or CRF70 was designed for a stock displacement engine. Once you add a big bore kit, that pump can't keep up. This high volume oil pump flows significantly more oil to critical engine components, reducing heat, wear, and the risk of catastrophic failure. Fits 1982 to present on all major Honda 50/70 platforms — bolt-in replacement, no machining required. Highly recommended any time you're building past stock displacement.
Why Builders Choose This Oil Pump
- High Volume Flow — Moves more oil per revolution than the stock pump, critical for modified engines
- Big Bore Compatible — Highly recommended when running any big bore kit to prevent oil starvation
- Broad Fitment — Covers Honda Z50, CT70, XR50, CRF50, XR70, and CRF70 from 1982 to present
- Bolt-In Replacement — Direct swap for the OEM pump, no special tools or machining needed
- Reduced Engine Wear — Better lubrication means lower operating temps and longer engine life
- Simple Install Note — Requires a 2mm drill-out of the oiling outlet for proper flow
- Peace of Mind — Do not let a $30 pump be the reason a $300 big bore kit fails
Perfect For
🔧 Big bore builds | 🏁 Race prepped pit bikes | 🛠️ Engine rebuilds | 🏍️ Trail and recreational riding | 👨🔧 DIY mechanics upgrading stock engines
Complete Kit Includes
- ✓ High volume oil pump (1 unit)
- ✓ Direct OEM replacement fitment
Technical Specifications
| Type | High Volume Oil Pump |
| Application | Honda 50/70cc Engines |
| Install Type | Direct OEM Replacement |
| Required Modification | 2mm drill-out of oiling outlet |
| Recommended Use | Required with big bore kits |
| Years | 1982 to Present |
| Vendor | 50 Caliber Racing |
Vehicle Fitment
- Honda Z50 (1982 and Newer)
- Honda CT70 (1982 and Newer)
- Honda XR50 (All Years)
- Honda CRF50 (All Years)
- Honda XR70 (All Years)
- Honda CRF70 (All Years)
Why Oil Starvation Kills Big Bore Engines
When you bore out a Honda 50/70 engine, you are increasing displacement, compression, and heat output all at once. The stock oil pump was sized for the factory engine and simply cannot move enough volume to keep up with the added demand. Oil starvation shows up as excessive heat, premature piston wear, and eventually a seized engine. Swapping to a high volume pump is the cheapest insurance policy you can buy for a big bore build. The 2mm drill-out of the oiling outlet is a simple, one-time step that opens up full flow.
Ran a 88cc big bore on my CRF50 for two seasons without this pump. Seized it. Added the high volume pump on the rebuild — zero issues since. — Verified Buyer
Easy install, just remember the 2mm drill-out. My XR70 runs noticeably cooler now. Should have done this from the start. — Verified Buyer
100% Risk-Free With R1 Protect
- 30-Day Returns — Not the right fit? Send it back, no hassle
- Fast Shipping — In stock and ready to ship
- Expert Support — 801-899-2520 | Real UTV techs, not a call center
⚡ Ready to Protect Your Build?
In Stock Now
Join thousands of Honda pit bike builders who trust R1 Industries for engine reliability.
Stop risking your engine on a stock pump. Upgrade the oil flow, protect the build.
Original: $26.00
-65%$26.00
$9.10
Description
Keep Your Honda 50/70 Engine Alive — Especially With a Big Bore Kit
Stop starving your engine of oil. The stock oil pump on your Honda XR50, CRF50, XR70, or CRF70 was designed for a stock displacement engine. Once you add a big bore kit, that pump can't keep up. This high volume oil pump flows significantly more oil to critical engine components, reducing heat, wear, and the risk of catastrophic failure. Fits 1982 to present on all major Honda 50/70 platforms — bolt-in replacement, no machining required. Highly recommended any time you're building past stock displacement.
Why Builders Choose This Oil Pump
- High Volume Flow — Moves more oil per revolution than the stock pump, critical for modified engines
- Big Bore Compatible — Highly recommended when running any big bore kit to prevent oil starvation
- Broad Fitment — Covers Honda Z50, CT70, XR50, CRF50, XR70, and CRF70 from 1982 to present
- Bolt-In Replacement — Direct swap for the OEM pump, no special tools or machining needed
- Reduced Engine Wear — Better lubrication means lower operating temps and longer engine life
- Simple Install Note — Requires a 2mm drill-out of the oiling outlet for proper flow
- Peace of Mind — Do not let a $30 pump be the reason a $300 big bore kit fails
Perfect For
🔧 Big bore builds | 🏁 Race prepped pit bikes | 🛠️ Engine rebuilds | 🏍️ Trail and recreational riding | 👨🔧 DIY mechanics upgrading stock engines
Complete Kit Includes
- ✓ High volume oil pump (1 unit)
- ✓ Direct OEM replacement fitment
Technical Specifications
| Type | High Volume Oil Pump |
| Application | Honda 50/70cc Engines |
| Install Type | Direct OEM Replacement |
| Required Modification | 2mm drill-out of oiling outlet |
| Recommended Use | Required with big bore kits |
| Years | 1982 to Present |
| Vendor | 50 Caliber Racing |
Vehicle Fitment
- Honda Z50 (1982 and Newer)
- Honda CT70 (1982 and Newer)
- Honda XR50 (All Years)
- Honda CRF50 (All Years)
- Honda XR70 (All Years)
- Honda CRF70 (All Years)
Why Oil Starvation Kills Big Bore Engines
When you bore out a Honda 50/70 engine, you are increasing displacement, compression, and heat output all at once. The stock oil pump was sized for the factory engine and simply cannot move enough volume to keep up with the added demand. Oil starvation shows up as excessive heat, premature piston wear, and eventually a seized engine. Swapping to a high volume pump is the cheapest insurance policy you can buy for a big bore build. The 2mm drill-out of the oiling outlet is a simple, one-time step that opens up full flow.
Ran a 88cc big bore on my CRF50 for two seasons without this pump. Seized it. Added the high volume pump on the rebuild — zero issues since. — Verified Buyer
Easy install, just remember the 2mm drill-out. My XR70 runs noticeably cooler now. Should have done this from the start. — Verified Buyer
100% Risk-Free With R1 Protect
- 30-Day Returns — Not the right fit? Send it back, no hassle
- Fast Shipping — In stock and ready to ship
- Expert Support — 801-899-2520 | Real UTV techs, not a call center
⚡ Ready to Protect Your Build?
In Stock Now
Join thousands of Honda pit bike builders who trust R1 Industries for engine reliability.
Stop risking your engine on a stock pump. Upgrade the oil flow, protect the build.
