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General Category => General Discussion => Topic started by: Adv_hoon on April 10, 2022, 01:30:38 PM

Title: Thickness of tonti frame under seat
Post by: Adv_hoon on April 10, 2022, 01:30:38 PM
I have just bought a 1977 850 T3 California that I parked in my parents garage. I took a lot of measurements as I wanted to order some parts for modification. But one thing I forgot to measure was the diameter of the two frame tubes running horizontally under the seat. Can anyone help me with this? I can find drawings of all geometry and measurements between mounting holes etc. but no description of the actual thickness of the tubes?
Title: Re: Thickness of tonti frame under seat
Post by: Ralph Plant on April 10, 2022, 02:07:38 PM
I'm looking at 30.15mm on my 78 LeMans
Title: Re: Thickness of tonti frame under seat
Post by: Adv_hoon on April 10, 2022, 02:09:50 PM
I'm looking at 30.15mm on my 78 LeMans

Thank you so much!
Title: Re: Thickness of tonti frame under seat
Post by: Turin on April 10, 2022, 03:44:44 PM
What are you doing to the frame?
Title: Re: Thickness of tonti frame under seat
Post by: moto on April 10, 2022, 05:37:27 PM
I'm looking at 30.15mm on my 78 LeMans

About the same for my standard T3. Say 30mm w/o paint.
Title: Re: Thickness of tonti frame under seat
Post by: Adv_hoon on April 11, 2022, 12:41:40 AM
What are you doing to the frame?

I am trying to avoid to do anything, actually. I have been playing around with different ideas for a solo seat. The one from harpers and the original police seat are a little bit too "chunky" to my eyes. I actually really like this one, but I think it must be either custom made or from another motorcycle as it sits lower than either harpers or the police one:

(https://i.ibb.co/nkxp4nn/IMG-8577.jpg) (https://ibb.co/nkxp4nn)


So my reason for asking for the diameter was in order to make mounts for a "bobber-like" seat. And as I do not want to modify the seat and want to be able to put it back to original, then instead of welding on mounts I thought about making clamps that hold on to the frame rails, just as clamps used to hold the handlebars.
Title: Re: Thickness of tonti frame under seat
Post by: Dukedesmo on April 11, 2022, 06:49:11 AM
Just for confirmation, '79 built LM2 - 30mm as above.
Title: Re: Thickness of tonti frame under seat
Post by: Mayor_of_BBQ on April 11, 2022, 12:09:43 PM
I am trying to avoid to do anything, actually. I have been playing around with different ideas for a solo seat. The one from harpers and the original police seat are a little bit too "chunky" to my eyes. I actually really like this one, but I think it must be either custom made or from another motorcycle as it sits lower than either harpers or the police one:

(https://i.ibb.co/nkxp4nn/IMG-8577.jpg) (https://ibb.co/nkxp4nn)


So my reason for asking for the diameter was in order to make mounts for a "bobber-like" seat. And as I do not want to modify the seat and want to be able to put it back to original, then instead of welding on mounts I thought about making clamps that hold on to the frame rails, just as clamps used to hold the handlebars.

trusted member named Mike Tibereo was always here raving about a harley solo seat repro from ebay. I cannot direct you to the exact one, but maybe a good starting point in your search?
Title: Re: Thickness of tonti frame under seat
Post by: Adv_hoon on April 11, 2022, 01:37:10 PM
trusted member named Mike Tibereo was always here raving about a harley solo seat repro from ebay. I cannot direct you to the exact one, but maybe a good starting point in your search?

Oh thank you very much! Would really love to know what exact model it came from. Perhaps I should try my luck in a Harley forum and see if someone can spot it from just that picture.
Title: Re: Thickness of tonti frame under seat
Post by: moto on April 11, 2022, 01:51:14 PM
Mike is still active here. Try sending a PM to mtiberio.
Title: Re: Thickness of tonti frame under seat
Post by: Turin on April 11, 2022, 02:39:59 PM
Here is my old T-3 that I did back in the '90s. All I did was take a Tonti solo seat and carve it into shape with an electric carving knife to get the shape I wanted. Then I had it upholstered to taste. It's a lot easier than frame mods.

(https://i.ibb.co/bNMpZkc/turin.jpg) (https://ibb.co/bNMpZkc)


(tasslles and fishtails are a bit embarrassing decades later.)
Title: Re: Thickness of tonti frame under seat
Post by: Adv_hoon on April 12, 2022, 01:00:17 AM
Here is my old T-3 that I did back in the '90s. All I did was take a Tonti solo seat and carve it into shape with an electric carving knife to get the shape I wanted. Then I had it upholstered to taste. It's a lot easier than frame mods.

(https://i.ibb.co/bNMpZkc/turin.jpg) (https://ibb.co/bNMpZkc)


(tasslles and fishtails are a bit embarrassing decades later.)


I thought about going that route and just modifying a solo seat until it looked like I wanted. But now I ended up buying a cheap seat for a sportster that I will tryto see if I can make work.

If it looks embarrassing then you just have to wait a few more years, then it will probably be hip again :)

Mike is still active here. Try sending a PM to mtiberio.

Thanks a lot. I actually ended up buying a cheap sportster seat from ebay which I liked the look of and based off my measurements might work as intended. Time will tell :)
Title: Re: Thickness of tonti frame under seat
Post by: Mayor_of_BBQ on April 12, 2022, 06:41:14 AM
Mike is still active here. Try sending a PM to mtiberio.

is he? I hope so. Have not seen him post since he sold "the world's fastest eldovert" and said he was facing grave health issues
Title: Re: Thickness of tonti frame under seat
Post by: moto on April 13, 2022, 11:55:25 AM
He posted on April 9, 2022.