01 blaster

If the smoke ring is low down on the insulator, it could be possible to see it, but if it is way up inside like the one on the bottom pic I posted, I don't like your chance of reading it correctly.

Incandescent flashlight gobes could also interfere withe the colour hue.

The First pic you posted had a lower ring and that's were mine was When readable , Others might not be As Lucky , But When I Pulled it It was Noticeable before I used a Flashlight !
 
thank you i will try and also i have a stock air filter on now does it really make a big difference to go after market like a uni air filter and do you have to go up a jet size for that also