SU Eliminator carb and manifold

SU carb set up

All cleaned up ready. Has ball bearing dashpot type.

Runs copper mesh air filter. I use Motul road chain lube on the mesh as it's sticky.

Choke/fast idle mechanism. This is great because after cold starting, the choke can be applied complete with fast idle. When rider blips throttle, choke flicks off automatically.

Air cleaner back plate needed a bit of grooming.

Old foam element had disintegrated. This stuff is a fire hazard. I prefer copper mesh because it has the best breathing of any filter plus it is a natural flame trap.

Carb runs 2 throttle springs, 1 either side. The other side is particularly heavy so I may choose to reduce the spring tension.

This is how to shine up needle seat. Use a cotton bud with a Solvo Autosol polish. Put in drill and spin. Shines up a treat.

This is the needle seat I made from brass hex bar. Testing to come..

Needle is from Harley CV carb. Looks like a perfect fit to the SU float.

This is what I started using for carb cleaner. Works well, cheap price from Dollar shops.

Needs time to soak, a bath would be good.

Upswept Manifold

Only upswept manifold available on hand was an Evo type so I adapted it to Shovel rubber-band type ('78-on).

Before pressing sleeves on..

Sleeves pressed on and trimmed for length.

This manifold should allow any tank clearance, including 5gal fatbobs. Nice thing is the improved rider leg room.

Testing for leaks with 10psi

Tried to get conventional rubber bands to work but abandoned that in favor of silicon hose and individual clips.

Parting the hose off using a blade in lathe. Works a treat.

SU suppost bracket, braced to the left side of engine on coil mount bracket.

Silicone hose and narrow clamps. Here bubble testing at 10psi

Single fire Dyna coils.