1982 650G Oil change: Secondary Drive Gear oil plug?

[Fenixgoon]

I was changing my oil/filter per BassCliff's guide (fantastic, btw) and I double checked my clymer manual just to make sure I didn't miss anything. It says for shaft drive models, you should

"also remove the drain plug from the secondary drive gear cavity"

Their diagram is kinda crappy, and I'm pretty sure it's on the left side of the bike, but I just wanted to double check.

Left side http://img31.imageshack.us/img31/447...vegearleft.jpg
Right side http://img31.imageshack.us/img31/470...egearright.jpg

Also - does anyone know offhand what size the bolt is? It's torqued like a !@#$#@%.

[Nessism]

You are missing an engine bolt. What's up with that?

Not positive but I thought the 650 lubed the secondary gears with engine oil; no seperate cavity for gear lube. I'm sure someone that is more familar with the 650 will chime in here with a definitive answer.

[BassCliff]

Hi,

I think Mr. Nessism is right. On the 650's there is no separate secondary gear case for gear oil. They use the engine oil. Look in your manual. There's one on my site too.


Thank you for your indulgence,

BassCliff

[Fenixgoon]

You are missing an engine bolt. What's up with that?

Not positive but I thought the 650 lubed the secondary gears with engine oil; no seperate cavity for gear lube. I'm sure someone that is more familar with the 650 will chime in here with a definitive answer.

the missing bolt is from the highway bars.

the clymer manual claims there is a cavity for the gear lube (which is engine oil). i can scan the picture in the manual if you'd like.

[radbrad]

Fenixgoon,

I have a 650G too and I'm sure that you don't have to remove those bolts to change the oil. there is just the bolt on the bottom of the bike, and one on the oil filter cover. The manual recommends changing the rear drive gear oil periodically, but doesn't say anything about removing the bolts you have pictured there as part of a regular oil change. I'm referring to the factory manual which is on BassCliff's site.

- Brad

[Nessism]

the missing bolt is from the highway bars.

That bolt (#39) does look like a drain plug for the secondary gear cavity. Wouldn't hurt to open it and see if anything drains out.

Regarding those missing engine bolts, as can be seen from the photo, they are shown (#32 and #33). I have a couple of extra spare #34 nuts, the oblong ones, if you need.

[duaneage]

The bolt is above the exhaust pipe near the shift lever. When you see how much oil comes out from here you will be glad you changed it. When you have it filled back up place the bike on the centerstand and with the engine idling run it in 1st gear for a minute or so before venturing out.

[BassCliff]

Hi Mr. Fenixgoon,

Yes, those bolts should definitely be there. I've got them on my 850 too, with the oblong (egg shaped) nuts. They do hold my case guards, but that's not their primary purpose.

I was wondering when you'd get here Mr. duanage. I knew you would know.


Thank you for your indulgence,

BassCliff

[duaneage]

Cover the exhaust pipe with aluminum foil to keep the oil off the heat shield so it doesn't smoke up a storm when you are done. Torque is only 7 ft/lb so don't get carried away with it.

[Fenixgoon]

what size socket is #39? my 7/8" socket seemed to fit mildly well and i was able to turn the bolt somewhat.

[Steve]

what size socket is #39? my 7/8" socket seemed to fit mildly well and i was able to turn the bolt somewhat.

Please, please, PLEASE don't use your 7/8" socket on ANYTHING on your bike.

Unless someone has bastardized it in the past, it is all METRIC. Get some metric sockets and use the proper tools.

Your bike and your vocabulary will thank you for it.

.

[Fenixgoon]

Please, please, PLEASE don't use your 7/8" socket on ANYTHING on your bike.

Unless someone has bastardized it in the past, it is all METRIC. Get some metric sockets and use the proper tools.

Your bike and your vocabulary will thank you for it.

.

i know, i was just trying to see what fit. i probably shouldn't have bothered with my standard sockets though (and for what it's worth, i love the metric system as an engineer).

i measured the bolt as best i could with calipers - looks to be in the area of 21.xx mm (explains why my 22mm wouldn't fit ). Looks like the auto store will be seeing me again tomorrow.

[Dave_17954]

After rebuilding my engine on my 81 gs650 gl I can say for sure that that is a drain plug for the oil that lubes your transmission area which uses the same oil as the motor. Whenever I change my oil I remove both oil plugs as well as the filter for a more complete oil change if you dont drain the oil through this plug you'll be mixing new oil with the little bit of old thats in there. I use a piece of carboard from a cereal box to make a little funnel so it doesnt rum all over my exhaust. Yes the bolt that is missing there in your pic is definately a motor mount bolt and it does use the tear drop style nuts on them the reason being I imagine is that its a tight fit for a wrench in behind that area for just a plain style nut. Should have one on the other side just like it. As for my drain plugs I use a 13/16 open end wrench and it fits the drain plugs perfectly at least on mine. I converted that 13/16" to metric and it figures out to be 20.64mm

[waltfen]

Have a look at this old thread :-


Click Here

The 650 does have 2 engine oil drain bolts - one in the usual place and one under the gear lever.

The secondary drive uses engine oil for lubrication.

[Fenixgoon]

alright, i got a 21mm socket and it fits nicely. just to make sure i'm not going insane, the rotation to *loosen* the bolt is counter-clockwise? i've gotten it to turn a little bit but it does not want to move