ax-racing wrote:have you any experience to take off anti-lash gears on rz500 engine ?
Yes. I didn't use them when I rebuilt my engine. But I put them back on immediately.
When I was getting the bike running well (jetting and syncing carb, adjusting the auto lube pump cable), I fouled a few plugs. When the engine kicked back on a cylinder or two, It sounded terrible!!! You could feel the backlash in the foot pegs! It was so bad that I thought something was bad wrong under the clutch cover. I really thought something had come loose and was getting crunched up in the gears. Removing the clutch cover revealed nothing. All was well, so I installed the anti-lash gears to see if they would quell the madness that was going on.
When I put the anti-lash gears back on, the noise was drastically reduced but still very noticeable. So they do some of their job. Once I got my fouling problem under control, I don't hear or feel a thing from them. Maybe they are doing all that they are supposed to do as long as you don't have plug problems.
The next 500 engine I build will retain the anti-lash gears. Removing them is not worth the few extra HP, IMHO. Not if you are going to ride the thing on the street on a daily basis. I might remove them for a pure race application.
Steve