![changing the transmission fluid in a puch moped changing the transmission fluid in a puch moped](https://content.instructables.com/ORIG/FNS/9IEE/HU6BHRXY/FNS9IEEHU6BHRXY.jpg)
Plug opening on front side of gearbox will weep oil when gearbox is at correct level. You fill the gearbox with oil until it drains out of the side opening.
![changing the transmission fluid in a puch moped changing the transmission fluid in a puch moped](https://cdn11.bigcommerce.com/s-v2bmlqo/images/stencil/1280x1280/products/2062/5551/puch-tomos-transmission-gear-oil-250m-wm-1__81585.1609451113.jpg)
In addition to the drain plug on the gearbox bottom there is a filler plug on top AND a very handy plug on the side. Probably the grease I'd shot into the thing is still in there, never to emerge. (There was a slow drip from the drain plug I had always ignored - shame on me.) Perhaps, since the oil seemed to be staying in, I had allowed the level to get low. To my surprise, not much came out when I removed the drain plug at the bottom of the gearbox. View from below: drain plug obviously leaks a bit. I can't remember ever draining and refilling it, in more than 42,000 miles of riding. Of course, nothing did.īut once the seal was installed, the gearbox became virtually maintenance free. In failed attempts to keep it from pouring out I experimented with all kinds of ever thicker lubricant: Lucas oil, gear oil, grease ("elephant snot") anything that seemed likely to stay put. Of course this made for the continual necessity to "top up" the gearbox with new oil. But until that happened, everything I put into the gearbox was soon flung out, onto the motorcycle.
![changing the transmission fluid in a puch moped changing the transmission fluid in a puch moped](https://bringatrailer.com/wp-content/uploads/2016/04/Screen-Shot-2016-06-19-at-3.08.34-PM.png)
The side behind the primary drive mechanism - and therefore out of sight and out of reach - apparently wasn't sealed correctly.Įventually a mechanic fixed that, fitting a proper sealing ring. In fact, over the years, there never seemed to be any reason to change it at all!įor one thing, my old Bullet used to leak heavily from the gearbox. That means my gearbox oil didn't get changed every time I changed the motor oil. The transmission is not packaged to share oil with the motor, as it is in modern Royal Enfield motorcycles. I decided to change the gearbox oil in the old-fashioned Albion four-speed gearbox of my 1999 Royal Enfield Bullet. Pan and absorbent paper to catch spills, wrenches and a clean, empty plastic bottle with a squirt lid.