Hi, can anyone tell me the offset in mm of an original TT2 triple clamp ( marzocchi ) and the center line distance of the fork legs. Also the fork leg length from the center of the axle to the top of the stanchion.

Marc

Gotta ask; are you asking about the very first version (1981) with an 18-inch front wheel, or later versions (1982-85) with the 16-inch wheel? MikeV

Good point! Why not list both sets of data. You never know if someone want the specs for a later model. In fact are the TT1 triple clamps and forks different? I am trying to get start a data base of useful numbers for a project I am working on.

Here is my contribution; a set of typical 1982-on TT2 forks: 25mm offset; 195mm tubes on center; 730mm tube length.

Thank you for the info but per your previous post I now wonder if the 81 TT2 and the later TT1 are different?
Funny thing is I know Dale Newton ran Front/Rear 18 in /18 in wheels, 16 in/18 in wheels and 17 in/17 in wheels and never change the triple clamps on the 35mm forks! He had four TTs at the same time two were production TT2s and two were ex-works bikes I don't remember if they were TT2 or TT1 I will ask his son next time I see him. I think it important to record the specs and data of these bikes on this forum to keep the tribal knowledge alive.

Like I always said Ducatis are like snowflakes, no two are a like.

They are like snowflakes! The early TT2's had 185mm spacing of the triple clamps center to center of the forks. I think the early forks also had longer legs as they used 18 inch wheels, while the 16 inch front wheel TT1's had really short fork legs. Not to mention the few TT1's that were built had many different fork combinations. 35mm ZT1's, 38mm Zt's and 41.7mm M1r's. 18/18 wheels on early TT2's, 16/18 on later ones, 16/18 on TT1's, 16/16 TT1, 16/17, 17/17 wheel sizes. From bias ply to radials. Those bikes show a terrific road map to 80's engineering. I'll try to get more specific numbers when I can. Just wanted to jump in on an interesting thread. Lou

I don't know Ducttf1; why would you have longer fork legs on a bike with 18 inch wheels? I not saying you are wrong, just I find it odd.
One thing I do know that a lot of people don't is that if you change the wheel diameter an inch smaller and make rim width wider the tire diameter might only be 1/4 inch smaller or less. It not unusual that tires that are the same size and have the same aspect ratio fitted to the same rim width have small different tire diameters. Bikes in this era were getting wider tires and wheels almost weekly.

One bike that I always thought had a lot of influence on the proportions of TT2 was Yamaha's TZ350H. I never had a chance measure one how ever to my eye they look similar.

One thing that makes discussion of these bike difficult is that there isn't really agreement on what makes up the different pantah base racers. However it is late and I need to do some research. I will write something about it later.

To Ducttf1 and 618f1 thank you for your input on this thread.

Marc

Hi Marc, not a tremendous difference, only an inch between the TT2 and TT1, and only from what I've seen. Both with 16 inch wheels. From axle center to top of fork tube. I will have a friend measure with the 18 inch wheels. That is also a 38 mm TT1 to a 35mm TT2. We do know that most of these dimensions are what was available. You are correct so many things changed during that era, which is why I love it. I also agree, the TZ was the bike to beat. I guess the TZ350H is a 1980? That would seem right. Front wheel weight bias and tire technology. To me the TT Ducati's were the prototypes of where Ducati would go well into the future. Trellis frame, stress member motor, cantilever to rising rate rear. It's amazing to me how few people, even Ducati enthusiasts know so little about our bikes! They gave birth to the Superbikes. Lou

Ducttf1
You wrote "I think the early forks also had longer legs as they used 18 inch wheels, while the 16 inch front wheel TT1's had really short fork legs. "
I wrote "I don't know Ducttf1; why would you have longer fork legs on a bike with 18 inch wheels? I not saying you are wrong, just I find it odd. "

I now realize what you meant is that the top of the fork leg is sticking up pass the the top of the triple clamp!
Which is actually very common with motorcycles. Maybe they couldn't get the right length forks on that first batch.
It's amazing what you can figure out when you are cutting the lawn.

Marc