Bolt size..

Capt CF · Jan 25, 2013

Not really a pani question, but you guys will know. I am replacing a clutch cover bolt on a SF and the OEM bolt is listed as SCREW M6X70 1000 MTS/03. What I assume that means is that I am looking at an M6 metric bolt that is 70 mm long with a 1.0 mm pitch. Does that sound right?

I just want to be sure I get the right bolt and really, really sure if I end up having to tap the hole or helicoil/timesert it.

Thanks!

jarelj · Jan 25, 2013

You are correct M6 x 70mm. The "1000 MTS/03" stands for 2003 Multistrada 1000, which means that is the first model in Ducati's lineup which used that particular bolt. The OEM parts descriptions are kind of goofy like that. The only other variable is the head shape of the bolt and thread pitch, which the description doesn't tell you. For example, there are currently 7 different bolts in the OEM parts listing which are "M6X70", but they're all slightly different bolts. The easiest way to get the correct bolt would just be to get the OEM bolt. We have an OEM parts lookup on our web site, and have most of the common bolts, screws, washers, etc. in stock.

Ducati Omaha - Ducati OEM Parts Ordering System - Parts Fiche

Capt CF · Jan 25, 2013

Thanks, Jarel. I actually already ordered the bolt from you guys! Too funny...small world. I just wanted to be sure on the size in case the threads in my hole are shot as well and I end up trying to tap it or helicoil it.

BTW, I always use your fiche site. That is extremely handy so thanks a ton for having that available for us part-time wrenchers.

jarelj · Jan 25, 2013

Cool, glad we could be of assistance!

Capt CF · Jan 25, 2013

I may try for a longer bolt and see if there are any additional threads I can grab or may throw some teflon tape on it. If that doesn't work, I may tap it (that bolt is recessed pretty good) with an extension just to clean up the threads. If all else fails, I'll have to dump the oil, pull the clutch and the clutch side cover under it so I can get to the holes to helicoil them.

Capt CF · Jan 26, 2013

I figured out it isn't the bolt so I think my next move is to try to tap the hole to clean up the threads a bit and see if that works. I don't see any reason why this won't work and saves me the hassle of removing everything from the clutch cover down to the crankcase. I thought about a tap extension, but that hole isn't all that big and I don't think I could get the ones I have seen down in there.

Anybody have an opinion?

M6 X 1.00 D5 LONG SPIRAL HSS POINTED TAP TTC PROD :: Metric Long Reach High Speed Steel Spiral Pointed Taps | Travers Tool

supduc10 · Jan 26, 2013

Capt CF said:
I figured out it isn't the bolt so I think my next move is to try to tap the hole to clean up the threads a bit and see if that works. I don't see any reason why this won't work and saves me the hassle of removing everything from the clutch cover down to the crankcase. I thought about a tap extension, but that hole isn't all that big and I don't think I could get the ones I have seen down in there.

Anybody have an opinion?

M6 X 1.00 D5 LONG SPIRAL HSS POINTED TAP TTC PROD :: Metric Long Reach High Speed Steel Spiral Pointed Taps | Travers Tool

Use a piece of stiff wire or the rod that comes out the end of a vernier caliper to determine the hole depth first. If its say 80mm deep then a longer bolt may be all you need. There could be some virgin thread right down at the bottom of the hole if your lucky. It has been known. I"ve been in a similar situation.

Capt CF · Jan 26, 2013

supduc10 said:
Use a piece of stiff wire or the rod that comes out the end of a vernier caliper to determine the hole depth first. If its say 80mm deep then a longer bolt may be all you need. There could be some virgin thread right down at the bottom of the hole if your lucky. It has been known. I"ve been in a similar situation.

That's exactly what I was thinking and then going to the tap and finally helicoil if I need to bring in the big guns. Turns out the hole is 17mm deeper than the bolt that goes in there. Weird. I figured it would be really close, but that's got me pretty optimistic that I can nail this with a longer bolt. I'll go try to dig one up and see how it goes.

Capt CF · Jan 26, 2013

Problem solved, but figured I'd post it in case it helps the next guy. Sometimes it pays to do a little digging before you go crazy and take your motor apart and break out the helicoils. So just out of curiosity I was looking at all the clutch cover bolts on Jarel's parts fiche (thanks again dude, again, I have used it for years and can't overstate how helpful that resource is). I ran the bolt next to it through the fiche and it should be M6 x 65mm (the one that I have that stripped is M6 x 70mm). So I went down to the bike and pulled that bolt and held it up next to the one that came from the stripped hole. Guess what? It's longer! Switched the bolts and now everything snugs up nice and life is good. I think someone at some point had put those bolts in the wrong holes and that was the source of all the problems. I suppose it _could_ have been me, but I'm pretty meticulous about that sort of thing. Oh well, no matter. Problem solved.

Thanks!

Bolt size..

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