transmission torque/torsion-plate

[Hudriwudri]

hi there,

as im currently still (lifetime project LOL ) in the process of working on my Rnd cyl. tonti guzzi im trying to eliminate the frame lower rails as a measure for a lil less weight, better routing possibilities for the exhaust as well as looks (since im pondering on the idea of also using the later cam cover and perhaps cutting the front frame struts as well).

Anyways after i milled myself a decent 8mm torqueplate i noticed that without load my u-joint seems to touch (makes es a slight touching noise) the kardanhousing as im using quite long 350mm konis as those gave me back then a more responsive handling along with a lowered fork.

My question is "can" one without any greater danger, and knowing one should change with such long rear shocks the u-joint accordingly often, shim the torqueplate in order to line up the joint again, or is it a semi stupid idea??

I saw on some of the pics of racebikes (i.e. motobox guzzi) that they some of them also seem to have quite long rear shocks, nevertheless im hesitant to just go for the shimming, for safetymeasures, as i do not want to imagine a breaking, blocking U-joint to happen to me.
If i can i would love to keep the long rear shocks for the added handling.

thanks a lot for your help

tanti saluti and kind regards from italy

Christian

[ghezzi]

Interestingly, I had a look at a BMW (75/5) recently that had been modded for post classic racing etc.
The original front engine mount was below the horizontal lower frame rails, the mounting point had been shifted to above the frame rails. This effectively gives the Beemer more ground clearance by raising the cylinder heads.

THE ENGINE IS NOW CANTED BACKWARD AT A SHALLOW ANGLE, INSTEAD OF BEING HORIZONTAL.

I'm picturing in my head, if you are changing the Guzzi's front mount, and you are making a hefty plate for the rear top mount, then I ask the question?

How much room or how many degrees can you tilt the engine backward to lessen the angle at the uni joint?

[guzzigray]

To lessen the U Joint angle you could raise the front of the engine, especially if you are changing the front engine mounts. Team Taurus seem to have done this, see attached photo.

13.5 is considered the longest shock for a short swing arm.

[Hudriwudri]

Hello

first of, sorry for my delay in answering,
thanks to you for all your recommendations, i will try to look into the engine reangling issue when i get there.
The BMW version of reangling i knew as there are quite some BMW race bikes around here that have that sort of modification.
To be honest though, i might try to leave the engine parallel to the frame since it gives on guzzis such a nice picture with the monolitihic Guzzi engine sans lower loops, in line with the frame compared to modded BMW's.
Concerning the swingarm length from what i know my bike should have a Sp1000 swingarm as it used to be a Sp1000 originally.
From what i got told around here i assume the Sp1000 swingarms where the longer ones.
Anyways first i have to find myself the newer timing cover with the added upper mounting loops.
As said im afraid it will be a longer project

kind regards and thanks

Christian

[mariogiron]

What is the maximum limit for transmission torque?

[jackww]

I like Motoguzzi MAS12 race bike the most! It is a real sensation...It is strong and powerful!