Rake adjustment

[Deanohh_imp]

You're saying decreasing rake angle (steering stem angle) increases trail. ......sure about that?

But perhaps you could show a scale diagram of what you're trying to accomplish. I've never seen a set of triple clamps where the yokes are set to angle the fork tubes more vertical than the stem, plus have a bigger offset to maintain the same trail. Is that what you're asking?

I don't get the purpose but I hope you find what you're looking for.

Sorry, I'm used to the coordinate system for the Patterson Control Model where the origin is located at the head tube intersection, and not the contact patch.

I want to decrease the rake as much as possible without the fender hitting the headers.

Sorry, I'm used to the coordinate system for the Patterson Control Model where the origin is located at the head tube intersection, and not the contact patch.

I want to decrease the rake as much as possible without the fender hitting the headers.
I guess by rake you mean the angle of the fork tubes and not the stem angle. Most would include cutting and rewelding the head tube. Or use a scale model that you could easily manipulate without destroying a nice motorcycle. Do you own a cb1100 that you will use for this purpose?

keep your coordinate system and your wheels on the ground and you might get there if the laws of physics let you.