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General Category => General Discussion => Topic started by: NCAmother on June 13, 2025, 03:53:46 PM

Title: What is this on the front forks?
Post by: NCAmother on June 13, 2025, 03:53:46 PM

Here’s a picture of the lbottom of the forks on an old Tonti guzzi.   In the picture what is the socket head bolt for?  The bolt is facing the front of the forks
(https://i.ibb.co/KBYTS7S/IMG-4451.jpg) (https://ibb.co/KBYTS7S)

Title: Re: What is this on the front forks?
Post by: jrt on June 13, 2025, 04:00:04 PM

Drain plug.

Title: Re: What is this on the front forks?
Post by: NCAmother on June 13, 2025, 04:09:13 PM

Thanks!
One other Question:  what size are the axle pinch bolts?

Title: Re: What is this on the front forks?
Post by: turboguzzi on June 13, 2025, 04:22:48 PM

but just as important is the empty hexagonal cavity under it.... its for the nut of the axle clamping bolt! by the dust in it, someone has been riding without it for a looong time. not safe, not good.

Title: Re: What is this on the front forks?
Post by: Antietam Classic Cycle on June 13, 2025, 04:30:33 PM

Quote from: NCAmother on June 13, 2025, 04:09:13 PM

Thanks!
One other Question:  what size are the axle pinch bolts?

M10 x 40.

Title: Re: What is this on the front forks?
Post by: Stevex on June 14, 2025, 03:58:47 AM

That pinch bolt is a Allen bolt, with a domed nut in the the pictured recess.

Title: Re: What is this on the front forks?
Post by: John A on June 14, 2025, 11:58:42 AM

Do not over tighten the axel pinch bolts or it will crack the fork leg. It’s a place a torque wrench is will get you in trouble. Especially true on the side with the larger diameter of the axel. Don’t ask how I learned that..