You won't see those tiny black parts well displayed in the exploded views in the parts lists, if at all. They look like graphite or 'dropjes' (excuse my Dutch), are cuplike formed and clamp more or less the spherical part of the arm link. But please bear in mind that- at least in my experience - you can address almost every A/F issue in our carbs with mainjets, slow jets and adjusting the airscrews. In this here forum there's an awful lot of raising and lowering of needles going on and we see the same diagrams proudly presented over and over again. That's all theory. And that theory is also in the manuals like Clymer and others but many do not realise that the info in these manuals is often 'copy and paste' from other manuals issued by the same publisher, dealing with completely other bikes. If something is right for a Guzzi or Laverda, it doesn't mean that it's also every day practice for our models. Believe me, in the days that our bikes swarmed the roads, nobody would go at the needles. Why that was? Simply because the makers of aftermarket exhausts had done the effort to design them so that no rejetting was required and they advertised thus. But if you're tempted to a non OEM air intake, well, everything is possible and that is what you see a lot in this forum. It's a shame as long as the proven good quality airfilters are still available thanks to CMSNL, Dave Silver and others.
If you're curious (like I am) you probably wanna see it for yourself, but if you stay with stock parts, it can save you a lot of work.
