Savage_Rob wrote on 12/31/69 at 16:00:06:What year is your bike? I think the 86/87 models had needles with multiple notches and you wouldn't need to shave the spacer. If it's a later model, then shaving (or replacing with a similar, but thinner, spacer) is in order.
You're right about the needle, but just a footnote on this one....
The reason that the idea was developed (~5 years ago) to increase the main jet to a larger size, is because the '86/'87 models used a 155 anyway.