lincol1

I have a Evo 4t which has done very little work, when I got the bike I greased up the swing arm linkages and headset. The headset bearings were washed out and repacked with new grease as they appeared to have early signs of corrosion and grease was dirty. The bearings once washed out appeared to be in good nick and the forks etc. were refitted and adjusted up fine. What I found since is that I have had to adjust up the headset several times after a trial or practice as I get the tail tail clunk of slack headset bearings. The correct adjustment procedure was carried out on each occasion and I am confident the bearings are servicable. The adjusting ring is quite tight and it seems not possible to do it up to the point of being overtight. What is going on ??. What am I doing wrong ?? Any help or advise greatfully received, or should I order a new set ?? Lincol

Thanks for your reply, I have never had this problem before. I noticed the problem last weekend when I removed the valve cap to blow up the tyre prior to leaving. Prior to a trial today I replaced the valve thinking it was a faulty/damaged valve and blew it up to 25psi to transport to venue. At the venue I reduced the pressure down to 4 psi and was amazed to find that the valve continue to pass air. I rode the trial with a tightly fitted valve cap which worked ok. I can only think I have two duff valves or should I be using a different sort.

Hi, Is there such a thing as low pressure valves ?. The reason I am asking is that I have found that my rear tyre valve holds air with no problem at 25 psi however when I reduce this to 4 psi to do a trial the valve leaks. I have replaced the valve with another and it also leaked the same. If a low pressure valve exists where do I find them. Many thanks in anticipation, Lincol1