1974 750 GT(Sported)

Post pictures of your twin cylinder Bevel Drive Ducati (pre-1985) along with a description here.
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Bern
Parallel Twin
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Joined: Thu Jun 10, 2010 6:29 am
Location: Toronto, On Canada

1974 750 GT(Sported)

Post by Bern » Sun Oct 07, 2012 8:40 am

Hi Folks,

Thought I would share a few pics of the bike. I recently put new valves in, new venolia high compression sport pistons, rebuilt the carbs, revamped the electrics. She pulls amazingly now. Over the winter I plan to move the ignition switch to the front of the bike using an appropriate relay. The current position of the ignition interferes with the choke cable of the carb for the vertical cylinder. Anyone else have this issue, or could my manifold be the wrong type?

http://farm9.staticflickr.com/8316/8063 ... 9a_k_d.jpg
http://farm9.staticflickr.com/8453/8063 ... 2c_k_d.jpg
http://farm9.staticflickr.com/8171/8063 ... 53_k_d.jpg

Bern
Last edited by Bern on Mon Oct 08, 2012 3:50 am, edited 3 times in total.

radecal
Parallel Twin
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Location: Australia

Re: 1974 750 GT(Sported)

Post by radecal » Mon Oct 08, 2012 2:15 am

G'day Bern,
What carbys are you running?
My GT has a modified engine and 32mm Dels but has no problem with choke.
Regards,
RAD

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Steve Foster
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Location: Sydney, Australia.

Re: 1974 750 GT(Sported)

Post by Steve Foster » Mon Oct 08, 2012 3:40 am

G'day Bern
... new veglia high compression sport pistons ...
Curious to learn more about the pistons. Do you have a link to the manufacturer/supplier with any details?
Thanks
Steve
1974 Ducati 750 GT

Bern
Parallel Twin
Posts: 100
Joined: Thu Jun 10, 2010 6:29 am
Location: Toronto, On Canada

Re: 1974 750 GT(Sported)

Post by Bern » Mon Oct 08, 2012 3:53 am

Ha Veglia... i mustn't have had enough coffee. :oops:

http://www.venolia.com/

Had to ship them a set of sport pistons to manufacture from.
Im running the PHF 30s..Will post a pic later to show the positioning of the carb.

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Steve Foster
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Location: Sydney, Australia.

Re: 1974 750 GT(Sported)

Post by Steve Foster » Mon Oct 08, 2012 12:23 pm

Thanks Bern. Do you know if they were the the same weight as the Sport pistons or were they made to match the GT piston's weight?
Steve
1974 Ducati 750 GT

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BevHevSteve
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Re: 1974 750 GT(Sported)

Post by BevHevSteve » Mon Oct 08, 2012 2:51 pm

I stock high compression 81mm wiesco pistons suitable for 750 bevels

https://store.bevelheaven.com/new-arriv ... 0gt/sport/
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Bern
Parallel Twin
Posts: 100
Joined: Thu Jun 10, 2010 6:29 am
Location: Toronto, On Canada

Re: 1974 750 GT(Sported)

Post by Bern » Tue Oct 09, 2012 4:06 am

Hi Steve,

The weight was about 3 grams heavier than the sport pistons and the wrist pins were stock 22mm. The guy who did the machining of the head said I wouldn't need to balance the crank after comparing them to my stock GT pistons. The pistons were first oversize 80.4. I wish I took a few pics before I assembled the engine. They sure were pretty. :-)

This is the issue I'm having with the rear carb. My thought is it's a horizontal cylinder manifold.
http://farm9.staticflickr.com/8456/8070 ... 13_b_d.jpg"

Bern

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