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General Category => General Discussion => Topic started by: roadron on March 07, 2019, 07:43:28 PM

Title: cast wheel mod to fit lemans 3
Post by: roadron on March 07, 2019, 07:43:28 PM

I want to fit a cast wheel made for 195mm fork spacing to  lemans 3 forks with the 180mm spacing . I have the lemans 3 deep dish discs to be fit. It looks like I can machine the mounting bosses down to fit the lemans 3 discs . Doable? How much needs to be milled off the bosses each side?

Title: Re: cast wheel mod for lemans 3
Post by: mtiberio on March 07, 2019, 10:10:11 PM

Quick answer: "enough to center the rotors under the calipers". Most 195 front ends had 25mm of offset in the rotors, so the hubs are a lot wider than the 180mm Lemans 1 or 3 front ends with their deep dish rotors. What the exact offset of those deep dish rotors is, escapes me at the moment, otherwise it would be trivial to calculate. I believe I have seen a CX100 (195 front end) with Lemans 1 wheels and rotors but with a 7.5mm spacer between the rotors and hub.

Title: Re: cast wheel mod for lemans 3
Post by: Tusayan on March 07, 2019, 10:53:07 PM

Quote from: mtiberio on March 07, 2019, 10:10:11 PM

I believe I have seen a CX100 (195 front end) with Lemans 1 wheels and rotors but with a 7.5mm spacer between the rotors and hub.

I believe you're correct and that the CX100 came with those aluminum spacers. I'd assume the LM II did too.  I probably have a set of them because about 30 years ago I put a set of Marzocchi Strada forks on my CX, supplied to fit a LM III, and that involved removing the spacers.  Their exact thickness, I cannot say...

Title: Re: cast wheel mod for lemans 3
Post by: DAMMAG on March 08, 2019, 02:24:58 AM

I installed LM1000 wheels on my LM3 using the LM3 disks. Is this the sort of thing you are doing?

I "simply" got some carriers machined to suit the wheel, the disks and the offset.


(https://i.ibb.co/YhCCqRp/Guzzi-Disk.jpg) (https://ibb.co/YhCCqRp)

Title: Re: cast wheel mod for lemans 3
Post by: roadron on March 08, 2019, 10:34:58 PM

Looks like I need to remove 15mm each side from what i'm seeing here

Title: Re: cast wheel mod for lemans 3
Post by: roadron on March 09, 2019, 01:28:10 PM

I found a pic of a lemans 1 wheel. Looks like I'll have to machine much more than 15mm so my calculation is off .

Title: Re: cast wheel mod to fit lemans 3
Post by: roadron on March 09, 2019, 07:02:51 PM

does anyone know the width boss to boss on a lemans 1 or 3 or cx100 boss to boss?