Re: Best Pipe for top end speed - Garelli SSXL

DrGeorgeTompson (Alan) /
This single post is part of a larger thread. Start from the top or view this post in context.

> Aaron Turek Wrote:

> -------------------------------------------------------

> What do you mean by yellow dot?

from the wiki:

Garelli sold bikes with NOI style engines with 17, 20, 25, and 30mph top speed ratings. These different speeds were accomplished through a variety of means, including cylinder port area, head design, intake variance, various carbs and jettings, gearing, spark plug type, exhaust header diameter and shape, muffler restriction, and piston crown shape.

The cylinder generally seen on a NOI style engine is rectangular and cast iron. Like most Garelli jugs, these came in two varieties -- the "Red Dot" fast cylinder and the "Yellow Dot" slow cylinder -- with matching intake manifold|intakes. The porting difference is small, though the intakes are very different. The "Yellow Dot" or "Square Guy" intake bends on a 45 degree angle, while the "Red Dot" or "Curvy Guy" intake curves up without any sharp bends. These dots can be found by looking at the top of the intake flange, looking down so as to see through the bore. They can also be found on the underside of the flange on the intake itself. They are not always present as they were only painted on and can wear off.

This single post is part of a larger thread. Start from the top or view this post in context.

Want to post in this forum? We'd love to have you join the discussion, but first:

Login or Create Account