Topic: Clutch advise needed

[dramsell]

I am trying to revive a 78 CB 750F.  This bike has sat indoors since 1991.

The clutch needs to be looked at (won't go into gear) and the back brakes do not work. 

In the manual it says to shift into 5th gear and use the back brake to hold the motor still. 

I borrowed a spanner to take the nut off and I have no way to hold it.  Tried wood through wheel but nothing works.

Any ideas?

Also: does this nut turn  like a normal thread or is it reversed?

I had to use an impact driver to loosen the cover screws.  I will have to purchase new of these.

Thanks

Dave

[ken736cc]

Hi,
 It sounds like you may not have a clutch problem. The gears can be shifted even if the clutch does not disengage. Can you get any gear to engage while rocking the bike back and forth?  If you can get the bike in gear, you can immobilise the rear wheel and use the spanner to remove the clutch nut. This is a standard thread, counter clockwise to loosen.
 If you cannot get any gear to engage, then you may have a problem with the shift mechanism.
Hope this helps.

[mystic_1]

Hi,
 It sounds like you may not have a clutch problem. The gears can be shifted even if the clutch does not disengage. Can you get any gear to engage while rocking the bike back and forth?  If you can get the bike in gear, you can immobilise the rear wheel and use the spanner to remove the clutch nut. This is a standard thread, counter clockwise to loosen.
 If you cannot get any gear to engage, then you may have a problem with the shift mechanism.
Hope this helps.

+1  I'd consider popping off the mission cover and examining the shifter mechanism.  There are several small springs and such in there that sometimes like to go on walkabout.

mystic_1

[Tower]

+1 on the advise so far.  Indeed @dramsell, you may want to hold off on any clutch work at all, until the transmission/shifter issue is resolved.  Afterall, the clutch may be in perfect working order.

[dramsell]

What is the mission cover?  I am a real newbie to mechanics.

Dave

[mystic_1]

Aka shifter cover.  It's the one that your gearshift lever connects through.  The cover on the left side, rearward of the alternator cover, forward of the front sprocket cover.  Later 750's have the gearshift pattern stamped into it.

Honda calls it a "mission cover" for some reason.  Perhaps a contraction of "transmission"?

mystic_1