Well matte black or any dark and heat resistant paint on the intake and exhaust would look very sleek yet muted and decent (these would really shine after detailing especially if there's some clear on it for those pro-esque bay pictures). Oh and on the head any shade of silver/greyish metallic would look ace! If you highlight the lettering in a decent color like black or white that would look complete to me. of course Bhai yeh sirf suggestions Hein Meri taraf say.
Here are a few reference pictures, (I'd give all the lettering one and the same color though,..)

<img src="//live-pw-import.s3.amazonaws.com/original/4X/6/8/b/68b734a5719e5ad3cf28d982c135472451554fa8.jpg" width="375" height="5</p>