Gear adjustments Gears are off and have lost several gears

cannot loose gears as all gears are constant mesh with the connection being a toothed dog at the synchro drums, so you will have to more specific as to the problem
Are you slashing the gear on selection which I suspect is what is wrong and if that is the case replace the clutch master cylinder and bleed the system or if cable operation adjust the cable or replace it

It may just need servicing/adjusting.

Your reverse gear is actually first gear ... when you select reverse another 'cog' fits into the toothed wheels to change the direction of first gear ... to give you reverse...

It may be a sticky valve or just a bit of adjustment (workshop job..) that is required.

What you can try ..

Start the car ... move the lever through all the positions several times (foot on brake..). Keep your foot on the brake and then put it in reverse and rev the car. Hard!

Try doing it several times.

An auto transmission works on valves opening and closing. Reverse gear - in comparison with the forward gears - is seldom used. The reverse valve can 'stick'. Try forcing it to open ... frighten it ... but keep your foot on the brake...

What model? May need adjust clutch a little. Or adjust gear shift linkage a little too.

Release your gear selector cables; position your chain on the 1st.or lowest gear
for both the derailer and, pedal gears.
Adjust your cables tighten and, test (some bikes use the highest gear to adjust from.

It's possible that you have the bike in a gear combination that it should not be in. It's a little hard to explain here but I'll give it a try. There are certain combinations of gears that cause the chain to be a bad angle to the front and rear gears. If you are in a front such that the chain on the front gear is closest to the bike frame center and the chain on the back gear is furthest from the bike frame center, it means that the chain is at a too severe angle to the gears and that the chain may slip. The reverse is also true. If the chain on the front is on the gear furthest from the bike frame center and on the gear in the back closest to the bike frame center, you will have the same problem. In summation, this means that not all gears in the rear should be used with all gears in the front. This isn't a great explanation but you should be able to find some articles about appropriate gearing combinations on the internet. It is also possbile that your derailleurs are out of adjustment or that your chain has a stiff link as well as several other problems. I'd focus on the gearing and see if that solves the problem. Good luck!

It sounds like you have lost some teeth from your worm gear. This usually happens when the mixer has been overloaded. The teeth on the worm gear are designed to fail first to prevent more serious damage. To replace the part you will need to open the head on your mixer. The gears are at the front of the mixer packed in grease. It should be obvious that the worm gear has broken once the head is open. If it is not the worm gear, with the head open it should be easy to spot the problem. The gears are available as spare parts from several places on the internet. search for "kitchenaid worm gear"

For parts advice call Royal at 1-800-524-0799.

I do a lot of mountain bike riding and there have been a few times where the gear changing hardware has definitely become bent rendering it nearly useless when it comes to changing gears.  Inspect the hardware very closely for any signs of damage.  Also be sure to look at where the gear shift cables meet the gear shifters on the bars.  Where it connects in you will typically find an adjustment knob (note that you may have the same type of adjustment knob where the cable meets the gear shift mechanism also) which the cable rides in.  You will make much larger jumps in adjustment when using this method as the screws on the gear changing mechanism, which you mention in your original post, are more for fine tuning.  Best of luck to you on te repair and I hope you don't need any new hardware!
Joe

okay start with the deraileur in the smallest gear if it wont loosen cable and screw with the letter h by it if you cant see letter just loosen the one that lets it move out only go until its in high gear then making sure its shifted to high gear tighten cable slowly shift to low gear when it reaches low tighten small screw you havent adjusted yet to keep deraileur from going into spokes

There are several things that could be wrong:

Shifter out of adjustment

Chain worn

Chain and gear(s) worn

Shifter out of adjustment:
Try adjusting the cable tension by turning the barrel (the part between the cable and the shifter). Count the number of turns and reset it to its original position if this doesn't solve it.

Chain worn:
Chains wear out. hold a ruler up to it, with one end centered on a pin. 12" away, another pin should like up very very very close to the 12" mark. If not, it's probably worn out and needs to be replaced. No way around it. Some say chains are good for 500 miles only. Your mileage may vary. (keep reading...)

Chain worn and gear(s) worn:
If the bike has been ridden witha worn chain for a while, it will make the gears in the back wear faster too, and a new chain alone will not work. If this is the case, you need a new chain and new gears in the back. Often, gears in the back are replaced all at once in a 'cassette'. You'll have to make sure your front gears aren't worn out too!