Cooling: a bigger radiator and an electric fan

The finding

My CX500E cools with a fan driven off the engine, with its shroud fixed to the front hanger plates. A 650 has no engine-driven fan. It runs an electric fan on its own radiator.

So when the front hanger plates change for the 650, the cooling changes with them: radiator, shroud, fan, water pipes and stay.

Options

• The 650’s own set (GL650/CX650E, the ME2 parts): radiator 19010-ME2-003, shroud 19015-ME2-003, fan 19020-ME2-003, fan motor 19030-ME2-003, thermoswitch 37760-MC7-003, upper water pipes 19414-ME2-000. Honda’s CX650E parts list shows the radiator on the same rubbers and collars as my 500.
• A bigger alloy core with an electric fan, which the plan currently favours for looks and capacity.
• A CBR125 radiator. The build manual’s Stage 5 pick. Its own earlier section says it’s too small for a 650. Out.

What would change it

• Whether the engine I buy comes with its radiator and fan. Several of the listings found by the weekly search include them.
• The 650 radiator’s three mounts against my frame tabs, checked on the bike.
• Packaging around the front of the engine once the front end and exhaust are decided.

Stage 5’s gate is simple: no leaks, the fan cuts in, and the stationary noise test passes.