IMU mounting after installing track fairings

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im going to try leaving the motoholders position how it is and just work on reducing the vibrations. When the position is wrong it trips off the code as soon as the wheels start rolling. Im not getting any errors till near redline.

Im hoping i can recreate the error on my dyno and the work on a solution. That way ill be pretty confident its fixed before i roll up to my next track day
 
Blade Runner said:
Great question about the Pierobon. I really don't know. I would think unless you solve the vibration issue you are still going to have problems.

Hope you had a blast at Pitt Race!!!
Click to expand...

I did, what an amazing track. Takes a while to get your head around it.

I did some more digging and found that they went to lengths to get around this
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Sent from my iPhone using Tapatalk Pro
 
KarlKani said:
Also they only ran Pierobon sub frame, the front stay is the above combo all carbon which obviously has much different vibrational characteristics
Click to expand...

Exactly. And the frequency of the vibration is different on a 1199 vs a 1299 we found out. What a freaking nightmare. So glad when I got it to finally work but damn that was a P.I.T.A. !!!

vcyclenut said:
im going to try leaving the motoholders position how it is and just work on reducing the vibrations. When the position is wrong it trips off the code as soon as the wheels start rolling. Im not getting any errors till near redline.

Im hoping i can recreate the error on my dyno and the work on a solution. That way ill be pretty confident its fixed before i roll up to my next track day
Click to expand...

You are just setting yourself up for issues leaving that square mount in place. Do what twisted racer and I did and remove that tuning fork piece of junk and make a bracket. Then work on the vibration tuning.
 
Blade Runner said:
Exactly. And the frequency of the vibration is different on a 1199 vs a 1299 we found out. What a freaking nightmare. So glad when I got it to finally work but damn that was a P.I.T.A. !!!



You are just setting yourself up for issues leaving that square mount in place. Do what twisted racer and I did and remove that tuning fork piece of junk and make a bracket. Then work on the vibration tuning.
Click to expand...

you guys were all correct, i went as far as to fill the hollow box with rtv and a bunch of BB's to make it heavier and isolated the bracket with rubber mounts. It for sure helped, but did not fix it all the way

with the IMU mounted solidly to the motoholder as it comes, I would get the inertia error on my dyno by about 5-6k rpm. Interesting because that is actually earlier then when i was riding the bike. I think having the upper mounted to the fairing stay added some rigidity but im not sure why it is worse on the dyno

after my mods with the BB's and isolating the bracket it would not trip off the error unless i actually ran it to redline, i was half tempted to run it like that at my next track day but decided i want this completely 100% fixed


I have made a entire new bracket and didnt have time to finish all the testing but preliminary testing is positive . Thanks everyone for your input and insight. Still infuriating that moto holders sold me an expensive fairing mount that i asked them specifically about the IMU and i have to still engineer my own imu mount. They 100% are aware of this issue and should remove the stay from their website.
 
Just thought I would give an update on my new bracket and how it has been working out. Zero IMU problems and 4 full days of testing at some local track events. I do have one very important note for everyone though. Make sure that the wiring harness that is going to the dash does not what so ever touch the IMU bracket. Just a touching a little bit can cause issues. That wire harness is heavy and if touching the bracket can cause faults. I was at NJMP last week for Ducati Revs and morning session was perfect. Went out for a 2nd session and errors. I thought to my self thats strange. Turned out the zip tie holding my harness broke and the main wire harness was touching my IMU custom mount. I have sent the print file to a few members here. I have not heard back so I am thinking everything worked out well. Again if anyone needs the print file. Just PM me and I can send it to you.
 
Blade Runner said:
Just thought I would give an update on my new bracket and how it has been working out. Zero IMU problems and 4 full days of testing at some local track events. I do have one very important note for everyone though. Make sure that the wiring harness that is going to the dash does not what so ever touch the IMU bracket. Just a touching a little bit can cause issues. That wire harness is heavy and if touching the bracket can cause faults. I was at NJMP last week for Ducati Revs and morning session was perfect. Went out for a 2nd session and errors. I thought to my self thats strange. Turned out the zip tie holding my harness broke and the main wire harness was touching my IMU custom mount. I have sent the print file to a few members here. I have not heard back so I am thinking everything worked out well. Again if anyone needs the print file. Just PM me and I can send it to you.
Click to expand...

I have literally just this minute Been in the garage having a fiddle with the mount I’ve printed, thanks to your plans. I was just thinking about the loom and what to do with it.

With regards to the mount it’s taken me a good few attempts at printing a decent example. But after messing around with the slicer settings I think I might have my end product. I’m going to keep on trying, I’ll keep changing the infill settings etc and see if I can get it stronger again.
I’ve always wanted a 3D printed so thought I may aswell buy one and give this a go myself.

Thanks again for the stl file.
 
Blade Runner said:
Just thought I would give an update on my new bracket and how it has been working out. Zero IMU problems and 4 full days of testing at some local track events. I do have one very important note for everyone though. Make sure that the wiring harness that is going to the dash does not what so ever touch the IMU bracket. Just a touching a little bit can cause issues. That wire harness is heavy and if touching the bracket can cause faults. I was at NJMP last week for Ducati Revs and morning session was perfect. Went out for a 2nd session and errors. I thought to my self thats strange. Turned out the zip tie holding my harness broke and the main wire harness was touching my IMU custom mount. I have sent the print file to a few members here. I have not heard back so I am thinking everything worked out well. Again if anyone needs the print file. Just PM me and I can send it to you.
Click to expand...


my last track day i stayed with my old set up that would not trip a code until a couple hundred rpm's before redline and not everytime so i just short shifted a bit

the file you sent me i found not to be strong enough so we added a bit of bracing, will have time to do some testing with it this week
 
matty90v said:
I have literally just this minute Been in the garage having a fiddle with the mount I’ve printed, thanks to your plans. I was just thinking about the loom and what to do with it.

With regards to the mount it’s taken me a good few attempts at printing a decent example. But after messing around with the slicer settings I think I might have my end product. I’m going to keep on trying, I’ll keep changing the infill settings etc and see if I can get it stronger again.
I’ve always wanted a 3D printed so thought I may aswell buy one and give this a go myself.

Thanks again for the stl file.
Click to expand...

Matty and vCyclenut, I will take pictures of how I moved the wiring harness to void contact. Not pretty but very effective in keeping it away from the IMU mount.

vcyclenut I am curious what bracing you added. Please share if you get a chance. I didn't really brace mine but I did add foam to the bottom of the bracket that connects to the stay. (i guess in a way that is a brace) I will take picture of that as well tomorrow and share. I will say I can use the full revs of my bike in all gears. Well at least to the top of 5th. I don't have a track near me that allows me to get to the top of 6th.
 
Follow up photos for Matty and vcyclenut.

Foam brace at the bottom. I used 3m heavy duty double sided tape to hold the foam in place.
20200920_112330.jpg


I moved the dash wire harness over the top of the IMU holder. This made a massive difference keeping vibration away from the mount. Before I had it going below and to the side of the IMU but there was very little space for the harness and it was just a matter of time that it would end up touching the IMU mount.
20200920_113725.jpg
 
so I will call it a 90% success, for the first time I can run the bike up to the limiter on the dyno and not get errors but you can still see the sensor is picking up frequencies and making the sensor think the bike is leaning over when its not. As I have previously mentioned the dyno exacerbates the vibrations and it has always behaved better when actually riding it then on the dyno.

I took some extra steps to try to reduce vibrations. First i but some rubber double sided tape on the fairing mount where it comes in contact with the frame . I also put a light coat of some RTV gasket maker between the new inertia mount and the motoholders upper mount. Lasty i mounted the inertia sensor on top of some vibration reducing rubber/foam i got off of amazon. I had to trim some off of one side to get the sensor to register as 0 degrees when the bike is straight up and down. I will be testing this at Jennings GP in a couple weeks. Here are some pics and a video I uploaded to you tube. I find it very interesting that between 6-7k the sensor thinks the bike is leaning over then it clears up and doesnt act up again till right before redline



IMG_7859.jpg
IMG_7858.jpg
IMG_7857.jpg


video of inertia sensor test on dyno
 
vcyclenut said:
so I will call it a 90% success, for the first time I can run the bike up to the limiter on the dyno and not get errors but you can still see the sensor is picking up frequencies and making the sensor think the bike is leaning over when its not. As I have previously mentioned the dyno exacerbates the vibrations and it has always behaved better when actually riding it then on the dyno.

I took some extra steps to try to reduce vibrations. First i but some rubber double sided tape on the fairing mount where it comes in contact with the frame . I also put a light coat of some RTV gasket maker between the new inertia mount and the motoholders upper mount. Lasty i mounted the inertia sensor on top of some vibration reducing rubber/foam i got off of amazon. I had to trim some off of one side to get the sensor to register as 0 degrees when the bike is straight up and down. I will be testing this at Jennings GP in a couple weeks. Here are some pics and a video I uploaded to you tube. I find it very interesting that between 6-7k the sensor thinks the bike is leaning over then it clears up and doesnt act up again till right before redline



View attachment 33855View attachment 33856View attachment 33857

video of inertia sensor test on dyno
Click to expand...

Very interesting. I have not had any issues with lean. I just made sure it was zeroed out when aligning the bracket. This is absolutely nuts that we must go through this.
 
Blade Runner said:
No I have not. I have run it down the track with the angle showing on the dash and the most it has moved is 2 to 0 to -2. But not the fluctuation you are seeing.
Click to expand...

i havent had a chance to test it on the road, as ive said the dyno exacerbates the issue.
 
vcyclenut said:
i havent had a chance to test it on the road, as ive said the dyno exacerbates the issue.
Click to expand...
Talking with Bill my teammate he said he designed it like he did to allow some flex and to help cancel out some of the vibration. Maybe try our design without the added bracing and try using the foam the way I did. You may find it will work for you. Our print material was carbon.
 

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