Produits

Fully ported 30.5cc reed engine. Comes complete as shown in the picture with a Zenoah EZ start. Engine mounts and carb not included.

45" cat

The following work has been done:

disassemble crank to install +5mm long rod and re-balance combustion chamber cut to accommodate +2mm stroke crank and dome re-cut.

5mm cylinder spacer used to compensate longer connecting rod

eyebrows

transfer runner knife edged transfer ports enlarged/reshaped

intake port epoxied with dual boost ports cut lightened and windowed piston

exhaust duration raised and port widened

ignition timing advanced through coil location on ignition plate (fixed)

reed valve flowed and surfaced

reed case intake track flowed and surfaced

Fully ported and modified 35cc marine reed engine with +2.8mm stroke crank. Engine comes as shown in picture and without carb. The signature series are ported more aggressively and will have a significant power increase over a full mod. Signature series is recommend for competition use.

OBR balanced crankshaft for 30.5cc 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.</p> <p></p> <p>All balanced crankshafts have a lead time of about a week. If your order is time sensitive please contact us prior to placing your order to see what the current lead time is.

OBR balanced crankshaft for G320RC 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.</p> <p></p> <p>All balanced crankshafts have a lead time of about a week. If your order is time sensitive please contact us prior to placing your order to see what the current lead time is.

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 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 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 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

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.