New Build Project - KR-1 with 421 Athena Banshee motor.

[RickNC30]

Back to work...

New, shorter high tensile head studs fitted, head domes installed, all sealing O-rings held in place with silicone grease -



Head installed with refurbished water joint and new hose & clips -



VForce Four type reed cages with British made Showe reeds, 34mm carb adaptors -



First complete bolt together with PWK34 carbs and Ramair filters just to check that everything fits -



There`s still work to do - check squish clearances, shorten the inlet balance tube because the ends stick too far into the bigger carb rubbers, drill and tap those little bosses next to the chokes on the carb bodies and fit some kind of nozzles for the oil injection system - but overall it`s looking like an engine package that means business so I`ll probably be dragging the chassis back out of the corner next weekend...

[RickNC30]

As per the end of my last post, squish clearances have been checked by inserting the end of a suitably shaped length of 3mm soft solder into each side of the combustion chambers and turning the engine over - all good at 1.2-1.3mm. The brass fittings and sealing washers are ready for the carb mods -



The manifold balance pipe has been trimmed so it no longer intrudes into the inlet rubbers -



Those bosses on the carbs already have a cast in 3.9mm blind hole so I drilled that to 4.2 mm and tapped an M5 x 0.8 thread -



- then installed the brass hose fitting and using that as a drill guide bored a 2.5mm oil injection port through into the carb throat -



The `pull button` choke plungers will be replaced by cable operated ones when I get to the final build.