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| Supermono Project(s) https://www.ducatittandf1.com/viewtopic.php?f=25&t=12412 |
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| Author: | johnnybravo12 [ Fri May 03, 2024 4:20 pm ] |
| Post subject: | Supermono Project(s) |
I like the idea of racing a single cylinder Ducati, but the bevel singles are a little too dated for me. No disc brakes and pretty clunky transmissions. I can’t afford a real Supermono. Who can? So I thought about trying to make my own single from a twin. Turns out people have been doing this for quite a while. There are 3 different ways I have seen to do this. 1. Remove one rod piston and cylinder and rebalance the motor like a typical single without a counter balancer. A bob weight is clamped to the crank to take up the space from the removed rod.. I rejected this since it would vibrate too much and wouldn’t be able to rev high. 2. Create a pivot arm and connecting rod as a counter balancer similar to the Supermono. This is pretty complicated to construct and turns out very complicated to get the weights correct. 3. Leave the extra rod/piston/cylinder in place as a counter balancer and remove the cylinder head and replace with a perforated aluminum plate to allow air in and out. The 3rd option seems the best to me as the L twin has perfect primary balance and nearly perfect secondary balance. No counter balancers needed and not too complicated to construct. There is a Facebook page called Ducati Supermono Replicas where a few people have been running engines like this for years with great success. So here is my plan. I want to build a “proof of concept” bike that uses a lot of stock Ducati parts so I can concentrate making the engine conversion and not spend a lot of time and money on trick wheels and a custom chassis. For the engine I’m starting with an 1100 air cooled 2 valve monster motor. So it will end up a 550 single. (Actually 539cc) I’m using an ST2 style frame since the original Supermono used a chassis layout similar to the St2. I’ll post updates on my progress. |
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| Author: | flattop900 [ Sat May 04, 2024 9:36 am ] | ||
| Post subject: | Re: Supermono Project(s) | ||
Ducati's new single. These will no doubt show up at racetracks. A claimed 83+ hp, more than the Supermono, they won't be slow.
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| Author: | huit [ Sat May 04, 2024 1:22 pm ] |
| Post subject: | Re: Supermono Project(s) |
Now that’s a motor! I seem to remember a guy on the west coast did a 848 single project that got sone good press. I look forward to this build! Paul |
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| Author: | 618F1 [ Sun May 05, 2024 12:55 pm ] |
| Post subject: | Re: Supermono Project(s) |
Curious: Will the vent in the cylinder head "cap" have an upward-facing vent and some form of breather or filter on the end? Something to keep some slight oil through the rings from escaping? I read again and now see you did not say which head you would keep. Which and why? Thanks, MikeV |
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| Author: | johnnybravo12 [ Mon May 06, 2024 11:50 pm ] | ||||
| Post subject: | Re: Supermono Project(s) | ||||
Hi Mike I finished the “cap” and it is replacing the vertical cylinder head. I am just venting the cylinder directly to the atmosphere. Some of the supermono replicas I have seen actually put a small oil cooler right over the holes. Not sure if it actually provides enough airflow to aid in cooling. Here is a couple of photos of the finished piece. I also chucked up the cylinder and shaved most of the fins off.
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| Author: | Cal [ Tue May 07, 2024 2:10 am ] |
| Post subject: | Re: Supermono Project(s) |
Cool.....Thanx for posting  I get the aired out head. Do you air out/port the piston crown too?? That vertical cylinder may ventilate the crotch of your leathers at 8k.See ya, Clay |
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| Author: | johnnybravo12 [ Wed May 08, 2024 5:04 pm ] |
| Post subject: | Re: Supermono Project(s) |
Don’t really do anything to the piston. Just run the oil ring don’t need the compression rings. |
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| Author: | johnnybravo12 [ Wed May 08, 2024 5:07 pm ] | ||||
| Post subject: | Re: Supermono Project(s) | ||||
Making the rearsets. Copied the general look from Woodcraft.
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| Author: | huit [ Wed May 08, 2024 7:10 pm ] |
| Post subject: | Re: Supermono Project(s) |
Very nice ! |
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