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Discussion Starter #61
The bike is now running, it sounds fantastic! I balanced the carbs with the vacuum gauge. I prefer to use a single gauge as its far more accurate… if ever you have a bank of gauges connect them up to a single vacuum source and check they are calibrated. most are WAY off! with a twin I simply use a “T” piece and clamp the pipes individually with a pair of pliers, alternating from one cylinder to the other… the clamp in the picture is to damp the needle on the gauge. Its a VERY accurate way of doing it… makes a huge difference to the tick over.

Below is the initial configuration of the Ignitech ignition.










 

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Discussion Starter #63
I managed to get a Ducati Performance map and popped the advance data into Excel, along with the data from the Ignitech file. here is is in graph form. the Ducati map has 32 points on the RPM scale that are mapped, and the ignitech 10, which I feel is plenty. A lot of early electronic ignition bikes had two... tick over, and full advance! my old Jota jumped from 10 degrees at tick over, to 34 degrees at 2000 RPM!

there is an alarming blip in the Ignitech graph which may need some investigation when its on the road. the Ducati map is what I am used to seeing on other cars I have played with.

It will be easy enough to replicate the Ducati figures into the Ignitech map though... my mate showed me how to interpolate to match the different scales... but I glazed over after 15 mins!!!



 

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Discussion Starter #65
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…



 

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Discussion Starter #66
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!



 

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Discussion Starter #67 (Edited)
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!


 

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Discussion Starter #68
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!

I may start another build thread?



 

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Discussion Starter #70
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.




 

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Discussion Starter #73
Well the miles are increasing! Its running really well and I have done quite a few trips out with it, and I am enjoying the ride. Slight mishap... forgot I had left the tap on reserve and ran out of fuel!



 

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Discussion Starter #74
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 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...




 

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Discussion Starter #75
Just to finish this off, and potentially help anyone else who decides to use a 1000 DS engine on carbs.... here is the final settings. with this it runs an absolute treat! Liam Venter pointed me in the right direction, it was the tooth count on the cam wheel that was the issue. I now have rock steady tickover, and steady advance that matches what is actually happening and what the software says!

 
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