,74 t150 , black tank with bold flash, what color should the stripe be?
I guess your bike has the export tank, not the coffin tank fitted to many of the UK and European models?
Tank doesn't make any difference, no stripes, '74 has chromed or stainless fenders.
A lot of the supposed gold flashes I see now a days were red when they left the factory faded out by the sun.
Yes and no.
Black with Red flashes was officially '73 Series 2 (front disc brake), matching Red-background sidepanel badges. The Red is a candy over a Gold "ground coat", which becomes visible when the Red fades under long exposure to strong sunlight.
'74 T150 was Black with either Sundance Yellow flashes in the parts books or Gold flashes in the ads. In reality, the difference is only the candy ground coat - candy Gold lacquer over a White ground coat gives a Yellow finish, same lacquer over Gold or Silver ground coat gives a Gold finish.
The '74 T150's with Red flashes appear to have been one(?) batch; hard to say from here whether the tanks were left over from '73, or painted in '74 with leftover Red lacquer, or neither.
referring to just the petrol tank being a holdover. Parts swaps happened in both directions, mine was a June '74 and came with the T160 kick-start lever.
Afaict, T160 should've been the
'75 triple but there's some evidence to speculate there was some sort of hiatus during the summer 1974, certainly NVT continued making T150's, with T160 bits, 'til calendar November 1974. In addition to T160 kickstart levers some also had T160 lower yokes (fork lock boss cast but not machined), oil tanks with T160 inners (semi-circular cutout in the leading edge for the T160's timing-side ignition coil, seat looks like the shorter 'UK & General Export' one, leaving a gap to the back of the US-market tank, but T160's only have one seat length because, unlike T150's, both tanks are the same length.
My '72 probably sat at the dealer until it was discounted. It's titled as a '73.
4- or 5-speed and what's the serial number? "G"- ('72-) date-coded T150V's continued to be produced 'til calendar October 1972.