More helpfully, the UK bikes had narrow flat bars. Replica 400/4 bars are a reasonable substitute, a bit wider, but come ready drilled for the switchgear and wiring.
Here's my two 175s at an earlier phase in their development. The K4 on the left is wearing CB175K6 bars, the CL175K7 on the right is wearing CB400/4 bars. ( Along with CB175 K6 bodywork and exhausts ).
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