Fx450 fan mounting, gearing and map switch

Hey team I went good hard forest riding in the weekend to see how the girl would go,well pretty interesting, first of all the gearing was in the stratosphere so I dropped to a 12th front sprocket with a 51 on my spare ktm wheel,18 inch but also thinking of going back to the 52,but man did she boil up,I found any tight work was not ideal,so I'll replace the rad cap for a start as it does look a bit average,secondly I'll make up a fan kit to help out,( I've done this to other bikes and pretty easy) .
Does anyone have any great mounting ideas,I've always had rad braces on the other bikes so pretty easy onto them, the fx not so much so thoughts.

Also does anyone know where to get a bar mounted map switch like the trailtech 3 stage one I've drawn blanks,

Thirdly I got her on the mx track and she wasn't to bad ,a little bit of adapting over my 350 but not anywhere near as soft as I thought so the old girl keeps on chucking up surprises

Cheers, the fx to my understanding has a taller first and the box is spaced for more xc racing riding,all the guys I was with were on full Enduro machines so just had that lower gearing.
Rad cap was my thought as well,I'll be looking at some rad guards once the budget allows I'm just tidying a few other things up first as she sat for 2 odd years