Ducati custom build Mark II
Discussion
As always there are snags on a build like this… I have always been worried about the head of fuel the carbs will get… it was OK with a full tank, but not enough to give me a reserve position on the tap. This was overcome by fitting a small electric pump, but this showed a weakness in the float needles in the carbs, Any leaks here is above the engine so I bought some new and genuine float needle valve assemblies and set the float heights to 14mm with a gauge I quickly made up. Easier to do if you clamp the float into position with a washer… no leaks after they were fitted…
A couple of pictures under the seat…. the alloy rod is the tank stay velcro holding it in place!
wiring is nice and simple on this one! I mounted the ignition module on stilts with small rubber feet ( i used the original ones from the multistrada clocks) to insulate it from vibration.
This is probably the last post for a while... I will update again once its been road tested...
anyone interested, this is the link to my blog, where I have my other projects...
https://jtccc.wordpress.com/
But for now, the hunt is on for another project... I would like it to be another Ducati, but I am not ruling anything out! so if anyone has anything at the back of their garage gathering dust that they might sell... get in touch!
wiring is nice and simple on this one! I mounted the ignition module on stilts with small rubber feet ( i used the original ones from the multistrada clocks) to insulate it from vibration.
This is probably the last post for a while... I will update again once its been road tested...
anyone interested, this is the link to my blog, where I have my other projects...
https://jtccc.wordpress.com/
But for now, the hunt is on for another project... I would like it to be another Ducati, but I am not ruling anything out! so if anyone has anything at the back of their garage gathering dust that they might sell... get in touch!
I managed to get the raw data from some Ducati ECU files. I have colour coded it to see the pattern of the values in a visual format (isn’t Excel brilliant!) Across the top is the RPM, and down the left is the TPS values, The lower values are throttle closed. these follow what I would expect to see on a 3D advance map. I hope to replicate these in the ignitech map on the bike. Just need some decent weather to ride it!
Edited by buzzer on Sunday 10th February 10:15
I normally start the hunt for a new project in the summer, ready for the following winter to be sure I have something to work on... this year its all been a bit quick! I have not quite finished the Multistrada when along came another Duke... an ST4s this time. it runs well, bit is a little tatty ( the pictures make it look better than it is...) It was a bargain price, so I could not resist it!
For the moment I am going to sell off some of the bits I definitely know I wont use, and then put it to the back of the garage until the winter, when I will start the build in earnest... thats not to say I cant do little jobs :-)
not sure what this will be just yet... time to think about it!
If there is interest I will do another build thread?
For the moment I am going to sell off some of the bits I definitely know I wont use, and then put it to the back of the garage until the winter, when I will start the build in earnest... thats not to say I cant do little jobs :-)
not sure what this will be just yet... time to think about it!
If there is interest I will do another build thread?
Been out and had a good run of around 50 miles today, took a few pictures... The bike runs REALLY well, nice and smooth pick up, and revs to the red line cleanly, I am pleased with the result. I would say its down on power over the injected bike, but not much, and its enough for me!
A couple of things I need to change... the mirrors are crap in that position, and also the throttle is too slow, I need a faster action, and will be on the lookout for one next week.
A couple of things I need to change... the mirrors are crap in that position, and also the throttle is too slow, I need a faster action, and will be on the lookout for one next week.
WinstonWolf said:
Reserve? Ah, those were the days 
Looking good but you definitely need to build another...
yea, those were the days before gauges, and lights Looking good but you definitely need to build another...
As for building another... its already here , its a Ducati ST4s... going to be more radical this time...
In fact I did make a start... but she came into the the garage.... "what are those Carburettors off"
So now I am banned from the garage until September 
Thought I would update as although the bike went well enough, it missed that sharpness of the original bike… I thought it may have been the carb conversion, but it didn't feel like it...
so I checked the timing with a timing disk (been a while since I used it!) and a strobe, and guess what, the values in the matrix in the software didn’t correspond with what was actually happening on the engine! the bike was actually retarded throughout the rev range. I think this has something to do with the way the software is configured, I have emailed the manufacturer to see what they say. As a work around I set about changing the values so I had correct advance using a timing disc and a strobe. its now running MUCH MUCH better, and feels far more crisp! here are the before and after maps. although the second map says its getting 42 degrees advance, in reality its 34. It also ticks over much better... at the moment the TPS option is off... I will wait to see what Ignitech say before I do much more
below is a link to a 1 min video...
https://www.youtube.com/watch?v=P3jxqTXmBBk
so I checked the timing with a timing disk (been a while since I used it!) and a strobe, and guess what, the values in the matrix in the software didn’t correspond with what was actually happening on the engine! the bike was actually retarded throughout the rev range. I think this has something to do with the way the software is configured, I have emailed the manufacturer to see what they say. As a work around I set about changing the values so I had correct advance using a timing disc and a strobe. its now running MUCH MUCH better, and feels far more crisp! here are the before and after maps. although the second map says its getting 42 degrees advance, in reality its 34. It also ticks over much better... at the moment the TPS option is off... I will wait to see what Ignitech say before I do much more
below is a link to a 1 min video...
https://www.youtube.com/watch?v=P3jxqTXmBBk
Chipchap said:
Now that you have the ST4S based bike well under way and of course we are approaching winter, would you be looking to sell the Orange bike ?
A
I have thought about it... but to be honest I really like the way it rides... so for this year at least I will be keeping it. thanks for the interest though!A
Bit of an update... I rode the bike all last summer and have to say I love the way it rides and handles! but I felt that the 900 Monster carbs and long manifolds did nothing for the performance so I have just bought a pair of 41mm keihin FCR flat slides. they are copies, but appear to be very good quality! I will be making a pair of custom manifolds and split mounting them over the winter....
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