Products

OBR balanced crankshaft for G340RC engines. Our cranks are CNC machined before being pressed back together and hand trued. Balance factor is greatly increased over stock and you can expect more power across the board along with a huge drop in vibration. From our testing we see engines with a balanced crank spool up quicker, have more mid range power and rev higher.

All balanced crankshafts have a lead time of 1-2 weeks. If your order is time sensitive please contact us prior to placing your order. 

48T steel diff gear, includes nuts and washers

<p>(Our porting is not shown in picture)&nbsp;</p> <p>PROSTOCK - An affordable/mild version of a full mod. The PROSTOCK's are rated at 5-5.5hp, full mod's 6-6.5hp, and full mod long rods 7-7.5hp.&nbsp;<span style="color: #000000;">We guarantee performance of this top end to be as much if not more than similary priced ported top ends from our competitors.&nbsp;</span></p> <p>The PROSTOCK line has replaced the Race Ported line. The PROSTOCK engines produce more power than the race ports and are more economical.</p> <p>To keep costs down, we focused our time tuning this top end to the areas that would yield the most power possible while maintaining reliability and ease of use. At OBR, we do not believe in stacking or using thick cylinder gaskets. We always machine and reshape the combustion chamber on our stroked engines. To help with reliability, we also relieve the piston. Piston reliefs help reduce the chances of the piston seizing on the exhaust side of the cylinder when running lean or hot. We were the first in this industry to do the piston relief several years ago.</p> <p>Being that this line is a budget/starter top end, we tuned it to run well with any exhaust. We kept in mind that you may not have a pipe. We have seen great performance with everything from an HPI can exhaust to a pipe. If upgrading to a pipe, we recommend the Jetpro Boss. For those of you that are new to ported engines, we shot for ease of use. With proper installation a PROSTOCK engine is very easy to start and to tune the carb.&nbsp;</p> <p>We have left the porting open on this top end. At any time, you may send your engine/top end in to us to be upgraded to a full mod or a full mod long rod.</p> <p><span style="color: #ff0000;">*Tech notes: We have ported this top end to not need a modified crankcase. We recommend a standard Zenoah 4 bolt crankcase. This top end requires that you use a +1mm stroker crankshaft.&nbsp;</span></p>

These are old stock of Blackbone gears made by Lee Watson. These have been sitting for quite some time and may have minor surface rust. Nothing that would hurt the life of the gears or function.

These are old stock of Blackbone carriers made by Lee Watson. 

G230PUM Watercooled Top End

Brand new G320PUM crankcase end that has been pulled from a complete engine. Case does not include bearings or seals. Gasket surfaces will need to be cleaned before use.

Brand new G320PUM crankshaft that has been pulled from a complete engine. 

HPI 102615 - SFL-30MG DIGITAL SERVO FIRST GEAR

HPI 104960 - REAR BUMPER BRACE SET B

Servo saver set for the HPI Baja 5B/5T/5SC. HPI part number 85466.

Jetpro Slip On Exhaust Silencer Version 

Jetpro Slip On Exhaust Silencer Version 

Jetpro Slip On Exhaust Silencer Version 

Jetpro Slip On Exhaust Silencer Version 

Killswitch

KOV Bridge Compression Valve

Replacement recoil starter rope

Mounting kit to install any GP460/470 engine into a 1.0 5ive-T. Not compatible with the 2.0 or any other car/truck. A pipe and pinion gear are needed to finish a 46cc/47cc conversion.