Stripped bolt holes for clutch cover - Helicoil?

topolino · Jan 31, 2019

As Mutt has correctly suggested the figures to be used, you need to check your manufacturers data before you use any torque wrench. The clutch cover screws are

1. Meant as a one time use fastener
2. Are only rated at 3-3.5Nm.

You should invest in a small torque wrench that deals with figures from 1Nm to around 10Nm. Larger wrenches are simply not accurate enough at lower figures. If you use anything over the specified torque on a new cover, you will simply strip the threads yet again. Forewarned is forearmed.

endodoc · Jan 31, 2019

I was assuming that the bike in question was a 99 series not the V4. The 99 series bike Clutch Cover Closing Screw M6x1 is specd for 13nm. The V4 clutch case uses a Torx screw with an obvious smaller rating. I do not see why the screws would not be reusable. Regardless disregard my post if this is for the 4 and yes get yourself a small rated wrench. I have a Wera lever TW that is 1-12 nm and a Wera screwdriver TW that is 1-4nm in .2nm increments for the small stuff.

Mutt1979 · Jan 31, 2019

endodoc said:
I was assuming that the bike in question was a 99 series not the V4. The 99 series bike Clutch Cover Closing Screw M6x1 is specd for 13nm.

I'm only assuming it's the V4 as the thread is under that header. The OP doesn't exactly make it clear.

bradp51 said:
There is a handy screw driver you can buy from PB Swiss tools which does 1nm to 5nm. Great for small bolts and screw like the fairing screws. I have never lost a fairing screw after buying it.

Ordered!!

DucatiBiscotti · Feb 5, 2019

topolino said:
As Mutt has correctly suggested the figures to be used, you need to check your manufacturers data before you use any torque wrench. The clutch cover screws are

1. Meant as a one time use fastener
2. Are only rated at 3-3.5Nm.

You should invest in a small torque wrench that deals with figures from 1Nm to around 10Nm. Larger wrenches are simply not accurate enough at lower figures. If you use anything over the specified torque on a new cover, you will simply strip the threads yet again. Forewarned is forearmed.

Where do you see 3 Nm for the clutch cover? Instructions with the GB Racing Covers spec as 11 Nm.

Quick update, got the bike back, put on the stator/alternator side with a Tekton torque wrench (2-20Nm), @11 Nm.. no more snapped threads.

Does anyone have the torque specs of the entire bike (or specifically, fairing bolts)?

Mutt1979 · Feb 5, 2019

My information was direct from the dealer so I could install the carbon clutch cover.

The alternator side may well have a different rating. I would be dubious of claims/values from after market companies. Although most are reputable it is possible that they make mistakes. Check with Ducati manufacturer specs first.

topolino · Feb 6, 2019

DucatiBiscotti said:
Where do you see 3 Nm for the clutch cover? Instructions with the GB Racing Covers spec as 11 Nm.

Quick update, got the bike back, put on the stator/alternator side with a Tekton torque wrench (2-20Nm), @11 Nm.. no more snapped threads.

Does anyone have the torque specs of the entire bike (or specifically, fairing bolts)?

Fairing bolts are 2.5nm. I posted up a torque settings list elsewhere on the forum. Clutch cover bolts are definitely 3.5nm. GB quote the wrong figure.

Sent from my SM-G965F using Tapatalk

PanigaleV4S · Feb 6, 2019

GB Racing's instructions for 11nm is for their bolts that come with the covers.
The 3.5nm you quoted from Ducati is for the factory bolts.

They'd be made of different materials etc and there for have different torque requirements and ratings.

I've installed 4 sets of GB Racing covers onto my bikes now and I have never stripped a bolt and I've always followed their instructions.

Mutt1979 · Feb 6, 2019

PanigaleV4S said:
GB Racing's instructions for 11nm is for their bolts that come with the covers.
The 3.5nm you quoted from Ducati is for the factory bolts.

They'd be made of different materials etc and there for have different torque requirements and ratings.

But the engine casing doesn't change its torque limit/threshold because you've changed the bolt

topolino · Feb 7, 2019

PanigaleV4S said:
GB Racing's instructions for 11nm is for their bolts that come with the covers.
The 3.5nm you quoted from Ducati is for the factory bolts.

They'd be made of different materials etc and there for have different torque requirements and ratings.

I've installed 4 sets of GB Racing covers onto my bikes now and I have never stripped a bolt and I've always followed their instructions.

Be that as it may the torque figure is for the thread NOT the bolt. If you want to use 11Nm then go ahead, but I can only tell you what the factory state as the safe figure to use. If you strip your casing again, you're going to find this to be a very expensive exercise. Personally I always prefer to err on the side of caution. You can always tighten a bolt, you can't back it off once you've knackered the thread. Your choice mate.

PanigaleV4S · Feb 7, 2019

PanigaleV4S said:
GB Racing's instructions for 11nm is for their bolts that come with the covers.
The 3.5nm you quoted from Ducati is for the factory bolts.

They'd be made of different materials etc and there for have different torque requirements and ratings.

I've installed 4 sets of GB Racing covers onto my bikes now and I have never stripped a bolt and I've always followed their instructions.

Mutt1979 said:
But the engine casing doesn't change its torque limit/threshold because you've changed the bolt

topolino said:
Be that as it may the torque figure is for the thread NOT the bolt. If you want to use 11Nm then go ahead, but I can only tell you what the factory state as the safe figure to use. If you strip your casing again, you're going to find this to be a very expensive exercise. Personally I always prefer to err on the side of caution. You can always tighten a bolt, you can't back it off once you've knackered the thread. Your choice mate.

Good points. I've never thought of it that way.

Lucky for me, I didn't crack any of the cases then.

topolino · Feb 8, 2019

PanigaleV4S said:
Good points. I've never thought of it that way.

Lucky for me, I didn't crack any of the cases then.

Well that's a relief I'm sure. Some of the torque figures on the bike are surprisingly low, for example the lower triple clamp bolts, which are only 8Nm. You would have thought these needed to be much tighter, but they only need to exert just enough pressure to "distort" the clamps and grip the fork tubes. Anything more than that and you risk cracking the casting (and people have). By contrast some of the suspension bolts on the V4 are rated at 120Nm and the front frame bolts are 90Nm (double those of the V2 Panigale), so go figure. If in doubt, stick to the factory specs and you can't go wrong.

Stripped bolt holes for clutch cover - Helicoil?

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