Triumph T5 Speed Twin custom

Triumph’s post-War T5 Speed Twin is a rarity these days, so I’m assuming (and hoping) that the 1947 donor vehicle for this custom was a wreck. It’s by Fukuoka-based Snug, one of Japan’s lesser-known custom builders, and everything has been heavily reworked. The original 498 cc parallel twin OHV four-stroke has been replaced by Triumph’s later 650 motor, presumably from the Tiger T110. The cam has been upgraded to a hotter Megacycle item, and the carburetor is now an Amal 930. So Snug’s machine will have considerably more poke than the stock 27 bhp T5. The detailing is lovely, and the black, gold and red color scheme looks both original and appropriate. But will those vintage drum brakes have enough power to stop this bike?