Hi Duc_tmmc,
Thanks so much for the pictures, and congratulations for the beautiful exhaust
I also just noticed that there are currently 4 person posting Panigale V4 builds on this forum me,
@HKMP7 ,
@Jamin_00 and of course you, and we all using
@Melotti Racing Upper Triple Clamp, all with customized laser marking too
I guess, we all have "ahem" great taste
Regarding the Titanium Bolt for the sprocket, I was wary in the past because the current Titanium material and production process available still not allow the titanium bolt to be as strong as Steel Grade 12.9
That is why I did not change this bolt on my bike, and your post made me want to make sure how safe it is.
So to make sure, I just checked my stock bolt and here are the specs:
Turn out the stock bolt is only a Grade 10.9 Steel Bolt (marking stamp on the bolt head and not Grade 12.9.
Here are the dimension M10 x 30mm with 1.25mm pitch and 15.8mm head diameter
The next thing I checked is the Torque to tightened it is 55Nm with Grease B.
Based on all the above information I believe the ProTi Titanium Bolts is strong enough for this critical application.
Here are the reason why I am now confident:
First, ProTi stated on their website that due to their cold forging technique with the 64TI (Ti-6Al-4V) titanium material, (not machining the head of the bolt but forging), they were able to achieve tensile strength of Grade 10.9:
PROTI Fully Forged 64 Titanium Bolts, Panigale,S1000RR,RSV4
and below is the screenshot from their website:
View attachment 2428
Second, I check the recommended maximum safety torque of M10 Bolt from ProTi and they are up to 90Nm so much higher than the needed 55Nm to tighten the bolt as recommended by Ducati Service Manual
Third, I found 2 bolts that will meet the dimension and pitch requirement from ProTi:
a. M10L30-OTB04 which is basically the EXACT Dimension of the stock Ducati bolt since it has 16mm head diameter, screenshot below:
View attachment 2431
b. M10L30-OTB03 which I believe is an even better choice (both looks and spreading the force) because it has an 18mm diameter head which make it looks like a bigger bolt and also spread the clamping force more like an extra 2mm washer:
View attachment 2432
So, Thank You for posting the idea of replacing the bolt with Titanium because it made me do a research for the safety of the bolt.
Having said that, eventhough the tensile strength of the ProTi Titanium Bolt is claimed to be the same than Grade 10.9 steel alloy bolt, but if you used this for track use (meaning extreme force),
I strongly advise for you to replace the bolt every now and then, just to make sure. Because Titanium is more BRITTLE then Steel and that is just the nature of Titanium Material, just to be on the safe side.
OK, time for me to put this ProTi bolt Part# M10L30-OTB03 on the list of my next ProTi batch order that I plan after my exhaust arrived since some bolts on my exhaust will also need some ProTi upgrade too