You can get them at Harbor Freight.
With all due respect, "ride it until it breaks" is NOT a good idea. Bad things may happen, which may leave you in the hospital unable to fix your bike.
Not only dangerous to keep riding if something is not right and not knowing what is grinding or rubbing to make the noise in the first place could be doing major damage to other bits on the bike, could also in danger your life if something locks up, most replies are focusing on the gears, myself think something is misaligned like a chain rubbing or clutch basket or something, just need to dig in and look for wear marks, the back of the primary case with the chain rubbing on the back if the inner case not spaced right as there is not much room there spaced on the mounting bolt, we can guess as much as we like till the problem is found, over shimmed, not enough shims and if it's as loud as the OP say it is then something major is wrong, retrace everything you did before this noise started, but check everything on the outside before going inside, there has to be signs of rubbing/grinding.
Yes under $100 in NZ too so probably less than $50 in the US. I use mine a lot. Lift either the front or rear wheel depending on placement and very helpful on the bike lift too if your lucky enough to have both.
Dad would say: "it'll either go or blow!"
www.pit-bull.com
It´s there in first, second and third, haven´t been up to any high speed yet so don´t know about fourth gear. Last test drive was about 300 meters..... because of the noise. Follows the revs. New layshaft roller bearing, correctly shimsed (?) layshaft axle. Rigid frame, home made. Can not find/see anything that´s loose or broken, the whole bike is a new build from scratch. I will put up a video in a new thread, strange rattling sound but maybe it´s just normal?
I will try that, not sure just how to film it yet.
I only drove the bike a short run, not on yhe road, just to test if it worked. Don´t remember any noise. Since then I have just changed all 3 bearings and all bushings, bought a used shell in very good condition because in the old one the bearings in the drive side had been spinning.
I have had it up in the air but it was impossible to locate the noise, and it didn´t seem to sound like it does when driving.
It doesn´t seem to change much, if at all, when changing gears. Maybe a little worse in second than in first/third, but no big difference. It´s absolutely NO noise when standing still, clutch engaged and in first gear. But as soon as I start to move, release the clutch, it starts.
Considering that this box after restoring it have been driven no more than 6-7 km (4-5miles), absolutely not more, I doubt the bearing has been worn down.
