Topic: Drive chain adjustment

[jgary]

Hi.  I need to adjust the drive chain on my 76 CB750.  First question-what size is the rear axle nut?  I'm going to guess 22 mm.  Second question-how do I get a socket on that nut?  Do I have to loosten the exhaust & get an extension through the two pipes (original 4-4 exhaust)?  Thanks!

John.

[CHUNG]

I use a 10 inch Cresant Wrench, always have. As for the size, It's like a chevy with the original 1967 motor, maybe/maybe not original. A proper MM open end wrench will work, get a caliper and measure it.

[Raul CB750K1]

I always use an adjustable wrench (what's the correct name in english). Though they are not recommended for small nuts as they can round them, for such a big nut it's almost impossible to round it, and it normally is not too tight. You don't need to remove the pipes that way.

Raul

[oldbiker]

Hi Raul, in English a wrench is a Spanner. Hence 'Adjustable Spanner'.

[SteveD CB500F]

I use the original Honda tool (I have collected a few of these over the years).  It is a hex spanner but is thin enough to fit between the swing arm and the exhaust. It also comes with a slip-on extender to offer more leverage.

I have always used a parachute ripcord (sp?) clip in place of a split pin. My mate worked at the Royal Aircraft Establishment (RAE) Thurliegh Bedfordshire in the 70s and brought me home a couple. I've still got them.  Pics when I get home.

[jgary]

So if you're using an adjustable wrench, you're not too worried about the specified torque when you tighten the nut back up, right?  Thanks!

John.

[SteveD CB500F]

In 30 years riding these bikes, I've never torqued the rear axle.

Just hand tight and then 1/4 turn (just like wheel nuts on a car)

[rob]

jgary,

I was at a hardware store the other day to get large wrenches for just this purpose.  Luckily they let me go out side with a 22 and 24mm wrenches to make sure they fit.  Low and behold, one side had a 22mm nut, and the other a 24mm nut, when you check the size, make sure you check both sides..

Rob

[frostypuck]

Hi Raul, in English a wrench is a Spanner. Hence 'Adjustable Spanner'.

Maybe he meant the -real- English. In American, its an adjustable wrench.
Chris in Boston (where American English started (and sometimes goes to die))

[Lumbee]

...the only thing I torque on my 750 is the cam & head bolts