pinch bolt fork slider

Hi , here is my question, i want to build another front end but the pinch bolt fork slider was cracked (very common!)so is it advisable to use a disc slide one (have two in stock) and mill the disc lug (f or the look) , ending with a non pinch bolt on both sides ???

Not sure how common this problem is. In all the Commando's I've owned, all had disc front end and have never had this problem. My response is replace the broken slider and whatever you did to break it...don't do that again.

marinatlas said:

Hi , here is my question, i want to build another front end but the pinch bolt fork slider was cracked (very common!)so is it advisable to use a disc slide one (have two in stock) and mill the disc lug (f or the look) , ending with a non pinch bolt on both sides ???

Click to expand...

Why not just get the cracked lug welded, and avoid over tightening it in future?

marinatlas said:

Hi , is it advisable to use a disc slide one (have two in stock) and mill the disc lug (f or the look) , ending with a non pinch bolt on both sides ???

Click to expand...

ill not work as the axle hole is larger on the pinch bolt side. also the pinch bolt is there to keep the leg's from moving at the bottom

Two handed disc sliders (Norvil type) is what Fair Spares/Norvil use on their twin disc conversion. There is no pinchbolt and it probably wouldn't be easy to incorporate one in the chunky Norvil slider.

Obviously, with this set-up it becomes necessary to space the wheel centrally and in such a way that the legs are not pulled in or pushed out when everything's torqued up.

Hi, yes 79x100 i had forgotten the twin disc set up, so it's possible , assuming a new designed spindle and some spacer (as proposed on Norvil website).
I had never broken any pinch bolt slider , it just occurs that in my pile of parts i had two disc sliders and one broken pinch bolt slider, and as i am cheap, I want to use them, for a next project...!

Carbonfibre said:

marinatlas said:

Hi , here is my question, i want to build another front end but the pinch bolt fork slider was cracked (very common!)so is it advisable to use a disc slide one (have two in stock) and mill the disc lug (f or the look) , ending with a non pinch bolt on both sides ???

Click to expand...

Why not just get the cracked lug welded, and avoid over tightening it in future?

Click to expand...

Welding is tricky,
My friend is 40 years alloy welder, he struggles with the Aluminum Oxide these old castings throw out, Then the distortion...the flea bay as loads of broken sliders ''i have been buying them! with the view i will repair them properly, .....One day...it will require the entire end cutting off!

My mate Ed is a self taught welder he repaired his 500T pinch side slider some years ago and he's still doing trials on it.

Cash

cash said:

My mate Ed is a self taught welder he repaired his 500T pinch side slider some years ago and he's still doing trials on it.

Cash

Click to expand...

Hi Cash,
Only suggested tricky...not impossible.
It they are that easy..why do Ebayers quote " cracked lug easy repair" instead of getting these easy repairs done?
i have a few "repaired ones" full of blow holes and the hole roughly filed out.

Id attempt to sell the bad one and buy a new one. Yes it
costs money but if something goes wrong you could wreck
the bike, your face and your day.
As I get older, replacing stuff rather than bodging on seems
the way to go. When I retire, Ill have more time and less
money!

Onder said:

Id attempt to sell the bad one and buy a new one. Yes it
costs money but if something goes wrong you could wreck
the bike, your face and your day.
As I get older, replacing stuff rather than bodging on seems
the way to go. When I retire, Ill have more time and less
money!

Click to expand...

Yes sir I agree, even to the point don't sell it scrap it. If Ed's fails he'll be going at a snails pace and then chances are he'll hit mud.

Cash

john robert bould said:

cash said:

My mate Ed is a self taught welder he repaired his 500T pinch side slider some years ago and he's still doing trials on it.

Cash

Click to expand...

Hi Cash,
Only suggested tricky...not impossible.
It they are that easy..why do Ebayers quote " cracked lug easy repair" instead of getting these easy repairs done?
i have a few "repaired ones" full of blow holes and the hole roughly filed out.

Click to expand...

Anyone who is reasonably competent with a TIG set should find this repair very easy to do. Good thing about early cast alloy parts is that the material is pretty pure, and there are no problems with needing to boil out elements such as zinc which can make repairs on modern cast parts a lot more difficult.

A couple of mistakes made by lots of so called experienced welders, is they use the wrong filler material, and also seem to treat parts which might be well over 40 years old like brand new parts straight out of the box.

For simple repairs such as this its worth looking for someone confident with this type of job, and to avoid those who suggest they have been TIG welding for many years and suggest a weld repair isnt possible!