T3-850 getting back to "stock"

[katit]

Hello!

1. Together with a bike I got spare solo seat which I would like to install. Need some help with hardware, I seem to miss mounting brackets. Can anyone help with pictures on how it should be mounted? If hardware available - great, if not - I need to get an idea on how to mount it.

2. Rear light and turn signals. Looks like I need whole "assembly". What should it look like? Currently I have some aftermarket rear light and turn signals embedded into the storage bags.

See pics of seat and frame.. Also picture of a bike as it sits right now.

 

[lemans850i]

A 1975 - 1976 Should look something like this


It does not seem this was a cop bike which may have the solo seat

Contact Todd per email... he may Be able to help you getting the parts and may have the knowledge and the contacts to get the seat attachment

 

[katit]

A 1975 - 1976 Should look something like this
View attachment 29512

It does not seem this was a cop bike which may have the solo seat
View attachment 29513
Contact Todd per email... he may Be able to help you with the parts and he has detailed drawings I assume for the seat attachment

Todd who? This is 1978 bike

 

[lemans850i]

Todd is the owner of this forum website and the owner of GTM
He lives, breathes and eats Guzzi’s..

Email him to
Info @GuzziTech.com

 

[katit]

Here is better/bigger images. I also found some online reference on how to mount police seat. With that, main questions is.. Do I have police solo seat or what is it? Springs and seat itself I have/see on mine don't look like what shows elsewhere. Is it even Guzzi seat?

 

[john zibell]

If Todd can't help you, try Harper's Moto Guzzi. They have been a dealer since the bike was new. But please try Todd first.

 

[katit]

If Todd can't help you, try Harper's Moto Guzzi. They have been a dealer since the bike was new. But please try Todd first.

Todd responded they do 2000+ bikes, need to call Harper's. Hard to deal with it's all over the phone.

 

[john zibell]

Todd responded they do 2000+ bikes, need to call Harper's. Hard to deal with it's all over the phone.

You will fine Curtis is very helpful. He is my go to guy for older bike parts. I was just on the phone with him today to get bearings for a T3 rear drive I'm rebuilding for a guy.

 

[lemans850i]

Found this… Don’t know if that helps

 

[Glenm64]

It does look like a Tonti frame police seat that has been modified to fit something else. It has all the mounts for fitting the brackets and the 2 frame rests on the front but has added bolts through the seat base with the 2 angle brackets and springs.
See pictures of brackets and rails required to fit the seat. They are hard to find. Might be easier to fit a Harpers solo seat as no brackets required. You could sell the one you have and should get some $$ for it if I am correct about it being a Tonti solo seat.

 

[katit]

Hmm. Ok, I see. I may just fabricate mounts then and retain springs I already have.

 

[Glenm64]

No springs needed. It is bolted on the rear to brackets that act as a hinge and it rests on the 2 front mounts.
See here for better phots showing detail.
thisoldtractor.com/moto_guzzi_tonti_solo_seat_installation.html

 

[katit]

No springs needed. It is bolted on the rear to brackets that act as a hinge and it rests on the 2 front mounts.
See here for better phots showing detail.
thisoldtractor.com/moto_guzzi_tonti_solo_seat_installation.html

Saw that too. Problem is not just those zinc brackets. They supposed to mount to frame hole and some other black tubes via 2 bolts so they don’t move on a bottom.

I will need to figure out brackets that stay put but without utilizing other parts

 

[john zibell]

The T3 frame has two tabs on the top that act as guides for the stock seat. Those tabs have bolt holes in them. The rear of the police seat just bolts to those tabs. The parts manual for the police bike shows the bolts, nuts, and lock washers that secure the seat.

 

[Glenm64]

The T3 frame has two tabs on the top that act as guides for the stock seat. Those tabs have bolt holes in them. The rear of the police seat just bolts to those tabs. The parts manual for the police bike shows the bolts, nuts, and lock washers that secure the seat.

I beg to differ that the seat will bolt directly to the frame.
There are brackets (46) that go between the frame tabs and the seat mount tabs. The brackets have radial slots which allow the front of the seat to be adjusted forward or back to sit close to the tank, and they hold the seat rear higher. The brackets also face backwards which moves the seat pivot point backwards. The brackets can be used without the rails (44&45) but are not as secure due to only 1 fixing point acting as a pivot.
There are actually bushes (51) that go in the seat as it has a larger diameter hole than the bracket, and it allows the seat to pivot on the bracket when the bolt is tightened.

 

[john zibell]

I beg to differ that the seat will bolt directly to the frame.
There are brackets (46) that go between the frame tabs and the seat mount tabs. The brackets have radial slots which allow the front of the seat to be adjusted forward or back to sit close to the tank, and they hold the seat rear higher. The brackets also face backwards which moves the seat pivot point backwards. The brackets can be used without the rails (44&45) but are not as secure due to only 1 fixing point acting as a pivot.
There are actually bushes (51) that go in the seat as it has a larger diameter hole than the bracket, and it allows the seat to pivot on the bracket when the bolt is tightened.

I believe those are for the radio mount on a police model. Only one side has tabs that go up where you might attach, but the other side doesn't have them. Possibly you need them, but I haven't seen this setup since the 70s.

 

[lemans850i]

The bracket you referring to (silver)
Quantity in the Parts book is 2
One left one right. The slot for the second bolt allows for up and down adjustment of the seat.. not front and back! The picture shows a version of the bracket with two holes instead of a slot.
You do need the rails for the second bolt to hold the pivot bracket in position. Unless you’re able to figure out how to attach a second bracket left and right
to keep the bracket in position.
Shouldn’t be a problem to make those brackets...

 

[katit]

I will have to figure out different brackets though. As you said second bolt keeps brackets steady and it requires those other parts.

 

[lemans850i]

Extra amateur 2 minute drawing...
Two saddles made out of half pipe and bracket to attach the seat it’s all one piece....