iAnalyzer for belt tension

[K3V1N]

I have a couple questions for people that have used this app to set tension and for anyone that has seen a tech set tension.

I'm trying to set belt tension on a S2R1000 and in another thread members have given me lot of good info. I had done valves a bunch of times on a 620 but I'm finding the 1000DS has some differences one being you can't just go with the 5mm hex for tension.

So here are my questions

The CA Cycleworks video shows Chris checking by the crank

But i found another video where a guy is using iAnalyzer and he is checking by the cam.

Does anyone know where the ducati techs position the mic? If I have to pick I will go with what Chris shows.

My next question is with iAnalyzer I can get constant hz readings for the locations I'm checking but it is a little hard to read. If I move the timeline right on the bar in the lower section I find the first peak is around 99. But it is picking up so much and of you scroll past that first peak the hz numbers go up.

I'm not a sound guy, is there someone that has used this before and has a better understand of sound that can make me feel better about the reading?

Below is a screen shot. I'm going to recheck tomorrow and do the top cylinder before I put the covers on.

Any feedback is welcome. Thanks!

[sofadriver]

my 2 cents.........

save all this hassle.
sell the gizmo.
set vert with 4mm allen wrench and horiz. with a 1mm feeler gauge (per L.T. Snyder, DesmoTimes Maint. Guide, 3rd edition, 2011 - applies to DS motors only).
go riding.

[DucNaked]

my 2 cents.........

save all this hassle.
sell the gizmo.
set vert with 4mm allen wrench and horiz. with a 1mm feeler gauge (per L.T. Snyder, DesmoTimes Maint. Guide, 3rd edition, 2011 - applies to DS motors only).
go riding.

I'd agree this method will get you close enough. 

[mgrisham]

IAnalyzer isn't a gizmo, it's an app for the iPhone. I've used it setting belt tension on my M620.  Directions in the 620 service manual for the Mathesis tester (same idea, measuring frequency) show plucking the belts at their longest run; I don't know about S2R1000.

I think the 2D display is clearer than 3D. I set Auto-Peak to 1, so the program finds the loudest frequency; in a quiet place, that will be the frequency of the belt each time you pluck it. Hit Record, pluck a few times a few seconds apart, then hit stop. Now you can move the timeline by dragging the trace at the bottom to the right; a big peak appears at the beginning of each pluck and the Auto-Peak reading at that point is what you want. Between plucks, you're reading background noise.

[Armor]

This program shows where to check and is easy to use.  The only probem, it doesn't seem to run in Windows 7 64 bit. http://www.kchall.plus.com/#top. 

[Novelo]

I normally use this method 5-6 allen key test. I'm not to anal about it just need to get the job done and back to riding. 

[DucNaked]

I normally use this method 5-6 allen key test. I'm not to anal about it just need to get the job done and back to riding. 

The OP is asking about a Dual Spark, the 5-6 allen key method won't yield proper tensions.

[mgrisham]

Agree, 5-6mm won't work. The program at http://www.kchall.plus.com/#top seems fine on Windows XP. The place it shows to measure is the same for s2r1000 as the service manual for the M620: at the longest run, where Chris checks (at front toward crank for vertical, at bottom toward crank for horizontal). It looks like it would work if you have a laptop and a microphone.

iAnalyzer is fine if you have an iPhone.

[K3V1N]

Update

First I bought the full version of iAnalyzer for the iPhone ($19) just to see if it helped and I would say it did a little because you can set 1 peak and save recordings but if I had to do it again i would stick with the free version, The nice thing about this app is you are recording the sound so you can pluck the belt 5 times or 25 and go back and see a consistent hz value. I tried checked by the crank and cam but the crank is what I used as my values because that is what Chris used and after the last post i checked the service manual and that made me feel better about my choice (Thanks).

I adjusted till I was getting high 90s ( 97 to 99 ) for both belts. I'm basing my hz off what Chris has on his belt packaging 99hz recommended.

Then I checked that a 4mm would fit on the vert cylinder and on the horizontal I checked with a 1.5mm allen and that was not easy to slide through.

Then I checked that I had about a 45 degree twist on the belts. I'm going to keep looking into this but feel that I'm safe to ride it for a while.

Thanks for all the help so far. Thanks to He Man for his trick to hold that closer open (I'm going to make some kind of brass tool before my next service) and for his right up on his DS service. I will post photos in the next day or 2 and create some notes that should help me remember and hopefully help others.

[mgrisham]

The program at http://www.kchall.plus.com/#top says 140 Hz for s2r1000, and all other DS1000 engines as well. Check shop manual? Sorry to be the worry wart!

[WetDuc]

my 2 cents.........

save all this hassle.
sell the gizmo.
set vert with 4mm allen wrench and horiz. with a 1mm feeler gauge (per L.T. Snyder, DesmoTimes Maint. Guide, 3rd edition, 2011 - applies to DS motors only).
go riding.

I just got my manual and saw this.  Great to know

[sofadriver]

I just got my manual and saw this.  Great to know

yeah, Snyder should call his manuals "Desmos for Dummies" 

[WetDuc]

I like style the LT Snyder manual is written in.  Personable and understanding, with potential frustrations forecasted for the reader.  Especially helpful with topics like belt tension.

[K3V1N]

Thanks again for all the posts.

I always think about getting the LT book when I'm doing service and say I will order it for next time. I think I'll have to place a order today. I also emailed Chris at CA about his recommendation to set tension at 99hz and why the service manual I have says 140hz.

[mgrisham]

Finally remembered why the 140Hz frequency seemed strange; in March 2009 Ducati North America issued a service bulletin with new specs. According to lots of sources:

All previous and new model Ducati's requiring belt tensioning now will be standardized to the below specifications.

IMPORTANT: When checking and adjusting timing belt tension at the recommended scheduled maintenance intervals, if tension reading is less than 70 Hz (minimum allowed value on all Ducati motorcycles), reset belt tension as follows:

Refer to the appropriate shop manuals for cam timing procedure and belt tension setup, then reset to the below tensions for service.

Model
Belt tension spec for new belts upon replacement
Belt tension adjustment settings for used belts when inspected value is determined to be 70 Hz or less

All models:
Streetfighter, 1198, 1098, 1098R 999, 998, 996, 916, 848, 749, M1100, MS4, MS4R, MS4RS, ST4, SC, ST3, ST2, SS1000 HYM 1100, MTS 1100,MTS 1000, MS2R 1000, M696, MS2R 800, M620, M400, M695, SS800, MTS 620

New Belts:
110 Hz +/- 5, Horizontal and Vertical *

Used Belts:
90-100 Hz +/- 5, Horizontal and Vertical *

* Please note, these values may be inaccurate on previous Ducati Technical Data posters and service manuals. Data listed above should be considered the new standard and supersedes all previous bulletins and documentation. Please print and post this bulletin to be displayed with the most current Ducati service poster.

Sincerely,

Ducati North America 
Service Department

This was mentioned in http://ducatimonsterforum.org/index.php?topic=18964.0 on this board.