13-10-19, 12:57 AM
Check the fork movement, they have a max stroke of 120mm and work best when using as much as the stroke as possible. To much compression will prevent the forks from compressing a bit like hydraulic lock. To much rebound will prevent the forks extending fully and wind the forks down over a serious of bumps. If the forks do not move sufficiently they will not ride the bumps and cause an vague unstable front end on anything other than a billard table smooth surface..
If you are happy that the mechanic did a good job then it is probably to much damping not allowing the forks to move sufficiently.
The few test below will give some idea as to what is happening.
Tie a cable tie around the stanchion, with just its own weight and you not pushing the forks down. Put the bike on the centre stand and check the distance between the cable tie and the top of the dust seal. Write it downNow take the bike off the stand and push the forks down once. Put the bike on the centre stand and check the distance between the cable tie and the top of the dust seal. Write it down
Push the cable tie back down to the dust seal and ride the bike, brake hard a few times. When you return Put the bike on the centre stand and check the distance between the cable tie and the top of the dust seal. Write it down.
Now back off the preload completely and do the same checks again.
Post the results from both sets of checks.
If you are happy that the mechanic did a good job then it is probably to much damping not allowing the forks to move sufficiently.
The few test below will give some idea as to what is happening.
Tie a cable tie around the stanchion, with just its own weight and you not pushing the forks down. Put the bike on the centre stand and check the distance between the cable tie and the top of the dust seal. Write it downNow take the bike off the stand and push the forks down once. Put the bike on the centre stand and check the distance between the cable tie and the top of the dust seal. Write it down
Push the cable tie back down to the dust seal and ride the bike, brake hard a few times. When you return Put the bike on the centre stand and check the distance between the cable tie and the top of the dust seal. Write it down.
Now back off the preload completely and do the same checks again.
Post the results from both sets of checks.