Author Topic: Tonti Frame Bolts?  (Read 396 times)

Online Mayor_of_BBQ

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Tonti Frame Bolts?
« on: May 11, 2022, 11:28:55 AM »
Can someone rattle off the specs on the tonti frame bolts from the top of their head? These are for the junction between the downtubes and the lower frame rails? My bike had engine guards installed, and now that they are removed, I'm finding that the bolts are too long. The ones I have are shouldered so I cant just cut them down.

I am guessing socket cap head M12x40mmx 1.25pitch
And I think stainless is fine here with a dot of locktite?

Does that sound right?
Chad (Shadrach) in Asheville NC
1970 Ambo (oooh-shiny)
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1984 V65 Cafe Racer (gone but not forgotten)
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Offline blackcat

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Re: Tonti Frame Bolts?
« Reply #1 on: May 11, 2022, 11:35:48 AM »
Can someone rattle off the specs on the tonti frame bolts from the top of their head? These are for the junction between the downtubes and the lower frame rails? My bike had engine guards installed, and now that they are removed, I'm finding that the bolts are too long. The ones I have are shouldered so I cant just cut them down.

I am guessing socket cap head M12x40mmx 1.25pitch
And I think stainless is fine here with a dot of locktite?

Does that sound right?

Personally, I like the engine guards as I'd rather have those ground down in a crash then the heads.
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Offline fotoguzzi

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Re: Tonti Frame Bolts?
« Reply #2 on: May 11, 2022, 12:02:35 PM »
Crash bars work



I “might” have those bolts, do you need a couple?
MINNEAPOLIS, MN

Offline Antietam Classic Cycle

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Re: Tonti Frame Bolts?
« Reply #3 on: May 11, 2022, 12:05:33 PM »
I wouldn't use stainless, you really need stronger bolts. The V7 Sport uses M12 x 30 in that location.
Charlie

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Re: Tonti Frame Bolts?
« Reply #3 on: May 11, 2022, 12:05:33 PM »

Offline pressureangle

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Re: Tonti Frame Bolts?
« Reply #4 on: May 11, 2022, 12:09:12 PM »
You're unlikely to find extra-fine thread stainless bolts anyway, unless perhaps it's some European Aero source.

https://www.mcmaster.com/screws/socket-head-screws/system-of-measurement~metric/thread-size~m12/length~30mm/thread-pitch~1-25-mm/
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Re: Tonti Frame Bolts?
« Reply #5 on: May 11, 2022, 02:10:04 PM »
I dont like the crash bars, I wont be putting them back on, I already cut them up for another use


The bolts I have are 1.25mm pitch, but I'm not opposed to 1.75, I would just need the nuts too in that case.

I'm surprised 30mm is long enough, but I will try to find those...  ACE only carries up to m10 in socket cap head..  I called Fastenall and they have them in coarse (1.75 pitch) but you have to buy a bag of 25
Chad (Shadrach) in Asheville NC
1970 Ambo (oooh-shiny)
1979 LeMans CX-100 (battle axe)
1984 V65 Cafe Racer (gone but not forgotten)
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Offline dsrdave

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Re: Tonti Frame Bolts?
« Reply #6 on: May 11, 2022, 06:15:14 PM »
I wouldn’t use stainless either…. Try McMaster-carr
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Re: Tonti Frame Bolts?
« Reply #7 on: May 11, 2022, 07:45:24 PM »
Well I ordered 12.9 black socket cap head bolts and grade 10 yellow zinc nuts in M12x 30&40mm in 1.5 pitch from BelMetric

I think that is going to work?

Chad (Shadrach) in Asheville NC
1970 Ambo (oooh-shiny)
1979 LeMans CX-100 (battle axe)
1984 V65 Cafe Racer (gone but not forgotten)
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Online Scout63

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Re: Tonti Frame Bolts?
« Reply #8 on: May 11, 2022, 10:21:34 PM »
Hey Chad. I’ve found that the black finished fine thread bolts from the hardware store rust pretty quickly. It looks like Harpers has the Guzzi ones, which might or might not be better.

https://www.harpermoto.com/screw-98613630.html

The part number 98613630  is from the CX100 fiche:







Ben
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Offline wrbix

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Re: Tonti Frame Bolts?
« Reply #9 on: May 12, 2022, 04:36:54 AM »
www.boltdepot.com is your friend. No minimum order, wide selection of sizes and grades.
Bill in VA, sometimes FL

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Offline Antietam Classic Cycle

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Re: Tonti Frame Bolts?
« Reply #10 on: May 12, 2022, 08:30:32 AM »
www.boltdepot.com is your friend. No minimum order, wide selection of sizes and grades.

Same with Belmetric.


The part number 98613630  is from the CX100 fiche:


The last two digits of the part number denote the length in millimeters.
Charlie

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Re: Tonti Frame Bolts?
« Reply #11 on: May 12, 2022, 08:50:18 AM »
Same with Belmetric.

The last two digits of the part number denote the length in millimeters.

Great info Charlie, I ordered 2 each of 30 & 40mm so looks like im covered
Chad (Shadrach) in Asheville NC
1970 Ambo (oooh-shiny)
1979 LeMans CX-100 (battle axe)
1984 V65 Cafe Racer (gone but not forgotten)
2007 Breva 1100 (Sport 1200 tribute)

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Re: Tonti Frame Bolts?
« Reply #12 on: May 12, 2022, 08:53:29 AM »
Hey Chad. I’ve found that the black finished fine thread bolts from the hardware store rust pretty quickly. It looks like Harpers has the Guzzi ones, which might or might not be better.

https://www.harpermoto.com/screw-98613630.html

The part number 98613630  is from the CX100 fiche:







Ben

Thanks Ben, I have noticed the same thing, thats why I was hoping for stainless. Will see how it goes. Might give them a quick blast of paint after they are in place in the recessed well.  NCDMV inspector is coming tomorrow to 'verify the vin' which is now standard for any vehicle over 35years...  Did you find a number for HT? I sent him a message here, but I dont think he is active on the board anymore.
Chad (Shadrach) in Asheville NC
1970 Ambo (oooh-shiny)
1979 LeMans CX-100 (battle axe)
1984 V65 Cafe Racer (gone but not forgotten)
2007 Breva 1100 (Sport 1200 tribute)

Offline Pescatore

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Re: Tonti Frame Bolts?
« Reply #13 on: May 15, 2022, 07:53:07 PM »
So... these are no good?




The ones from Harpers are 12.9, rusted in 5 minutes and black looks... not pretty.
Are originals zinc plated?
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Offline Tom H

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Re: Tonti Frame Bolts?
« Reply #14 on: May 15, 2022, 11:24:18 PM »
From what I have seen so far. Original is a zinc or cadmium plating.

Tom
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