6209 - CNC Ported Full Mod Zenoah 30.5cc 4 Bolt Long Block - Billet Crankcase All of you current OBR

All of you current OBR owners can send in any piston port Zenoah 4 bolt engine to be upgraded

After seeing that the bolt pattern on the clutch side of the engine was the same on the water cooled twin

No need to have these pipes plated or powder coated etc to prevent rust

includes nuts and washers

And most other large scale cars

6209 - CNC Ported Full Mod Zenoah 30.5cc 4 Bolt Long Block - Billet Crankcase All of you current OBRThis long block now comes with a TR OBR billet crankcase at no extra cost. Every long block or engine is now CNC ported and hand finished. CNC porting and hand finishing is all done in house by the OBR staff. We do not contract out any of our porting so every engine is modified to our exact specifications. We are able to offer higher accuracy this way as well as more power. Our CNC machine has allowed us to take our porting to the next level due to us