"The weel axel had play on the fork slider and was modified for proper fitment, i will recheck if that is well enough."
What is this about? Wrong axle, too large hole in slider? This could cause your problem
This is so true.... I tried to reuse the left fork leg on my rebuild... and I judged that the slight movement of the spindle would be taken up when tightening the pinch boltHave you torqued up the front spindle 60 ftlbs and the the pinch bolt in the rh leg to 15ftlbs. If they are not tight you can see the front mudguard twist when you pump the forks with the brake on.
Regarding tyres, I assume Antonio means ‘Avon Roadrider’ universal on the rear... correct Antonio ?
I thought it interesting that you say the problem is worse when you have the shocks on a softer setting. One thing that happens when you soften the shocks is that the rear ride height reduces, this in turn changes the geometry of the bike.
Are you certain that both the forks and the shocks are the correct length?
Are you certain the fork internals are working correctly and have the correct amount of the correct oil?
Please explain, and ideally show some pictures of your spindle / fork slider issue.
If the rear of the bike is down, that increases the rake and thus the trail. I would expect the bike to weave when accelerating out of corners, rather than when braking. However if the geometry of the bike is designed for a 19 inch wheel, and an 18 inch wheel has been fitted, that decreases the trail and you would be more likely to have weaving as you brake. I think you have to be very careful if your bike is sending you messages like weaving. It can easily turn onto a lock to lock tank slapper and deck you.
If the rear of the bike is down, that increases the rake and thus the trail. I would expect the bike to weave when accelerating out of corners, rather than when braking. However if the geometry of the bike is designed for a 19 inch wheel, and an 18 inch wheel has been fitted, that decreases the trail and you would be more likely to have weaving as you braked.
Too large hole in the slider was found, an aluminum insert was fited, as there is not much material the shaft was reduced in order to place the insert properly."The weel axel had play on the fork slider and was modified for proper fitment, i will recheck if that is well enough. "
What is this about? Wrong axle, too large hole in slider? This could cause your problem
Some will even do it if front tyre is under inflated.Nearly EVERY BIKE will do this when the front tire is partially worn.
Some more than others.
The rim sizes used where to mach Roadriders technical bulletin for weel size.
I have been informed that a smaller 325 improves the Norton handling this is the reason it was fitted with matching 1,85rim.
The wider rear 2,50 rim is to mach Avon's recommendation for 100/90 19.
Both wheels where built to mach Avon Roadrider recommendation for what is available for 19 tires.