**Our porting is not shown in picture**
This is a brand new fully modified 4 bolt top end for the Trevor Simpson reed crankcase.
This top must be used with a 2mm stroker. Due to the modification that have done to this top end it can only be used on a reed case. Since the gas enters the engine directly through the crank case this allows us to do additional porting that can not be done on a piston port engine.
This top end includes:
fully modified cylinder, lightened and relieved piston, piston ring, wrist pin, needle bearing, needle bearing washers, cylinder gasket, c-clips and a spark plug. The following modifications have been done to this top end:- Intake port is filled in with epoxy
- Machine 5th port
- Cut the combustion for the 2mm stroker with out stacking gaskets
- Modifiy transfer ports for better flow 5. Lighten the piston
- Relieve piston to prevent seizing
- Resurface all ports for better gas/oil mixture
- Adjust exhaust timing to our specs.
- Reshape the exhaust port
- Rebevel all porting and stock bevels to prevent damage to the piston and/or cylinder.
This item fits:
Baja 5b and 5t
