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General Category => General Discussion => Topic started by: Turin on November 24, 2020, 10:53:39 PM

Title: Tonti Steering Stems
Post by: Turin on November 24, 2020, 10:53:39 PM

Odd question. I have a rebuilt LeMans 1000 front end that I want to attach to a 70's T-3 steering head. the lemans 1000 steering stem is too long for that frame. Will a shortneck steering stem fit the lemans 1000 triple clamps ?

I'm not intersted in a gsxr or honda front end, trying to keep it guzzi.

Title: Re: Tonti Steering Stems
Post by: kfz on November 25, 2020, 01:41:07 AM

I think the stem is same diameter.  Compare the bearing sizes?

Why are you doing it.  if its for handlebars i have a 40mm SPIII top yoke for handlebars.

Kev

Title: Re: Tonti Steering Stems
Post by: Turin on November 25, 2020, 07:49:17 AM

I have a rebuilt set of 40mm lemans 1000 forks and triple clamps that I want to use for my project. I cross referenced the bearings and that matches. What I'm worried about is the diameter of the base of the stem which will need to be pressed into the new lower clamp.

Title: Re: Tonti Steering Stems
Post by: fotoguzzi on November 25, 2020, 08:12:11 AM

Unlikely that Guzzi would change that size for just one model. I'll bet the stem diameter is the same (at least) for all early Tonti frames if not all big twins.

Title: Re: Tonti Steering Stems
Post by: Groover on November 25, 2020, 08:15:51 AM

I also believe they are the same from past research on this, but I'd also like to know 100%. Hopefully someone will pitch in with the "ya, I've done it" response.

Title: Re: Tonti Steering Stems
Post by: Canuck750 on November 25, 2020, 10:17:21 AM

I swapped a stem out once before and had no issue with pressing the stem into a replacement lower clamp. Do you know the length of stem you need? I may have one in my stash

Jim

Title: Re: Tonti Steering Stems
Post by: Turin on November 25, 2020, 06:30:08 PM

Jim, I need the eary tonti 170 mm long stem. That would be great if you have one.

Title: Re: Tonti Steering Stems
Post by: wirespokes on November 25, 2020, 06:36:24 PM

Rather than pressing the stem out, I'd rather heat the lower clamp to 250f and the stem will drop out.

Title: Re: Tonti Steering Stems
Post by: Canuck750 on November 25, 2020, 06:38:07 PM

Quote from: Turin on November 25, 2020, 06:30:08 PM

Jim, I need the eary tonti 170 mm long stem. That would be great if you have one.

I will see what I have and let you know.

Jim

Title: Re: Tonti Steering Stems
Post by: acguzzi on November 27, 2020, 10:32:39 AM

just to give you more confidence, I have done exactly the same thing with no issues.

Title: Re: Tonti Steering Stems
Post by: Turin on November 27, 2020, 05:30:48 PM

Fantastic!