Author Topic: 75 750 adjusting the clutch? (Read 3912 times)

75 honda · « **on:** November 24, 2009, 04:52:14 PM »

I put new disks in my basket and have a question about tightening the springs and spring plate. Do I tighten those 10mm bolts all the way down or do I leave some play in them? It seems like when I tighten them all the way down I can't get the adjusting screw to work right. But when I only tighten them half way, I can pull my lever and have clutch. Any ideas?

mystic_1 · « **Reply #1 on:** November 24, 2009, 05:32:08 PM »

They're supposed to be tightened all the way.

How are you adjusting the clutch? Loosen both cable adjusters then adjust the clutch lifter screw as per the manual, only then adjust the cable adjusters.

Did you install an OEM clutch pack or did you get one of those aftermarket "extra plate" clutches?

mystic_1

75 honda · « **Reply #2 on:** November 24, 2009, 06:17:51 PM »

They were oem I got from honda but a little better then the style that was in there. Here's what happens. I tighten them down. Put the slack in the cable all the way. Loosen the nut and screw in the adjuster, BUT, it keeps screwing and I run out of room before I feel it hit the plate.

mystic_1 · « **Reply #3 on:** November 24, 2009, 07:40:29 PM »

Odd. Any chance you inadvertantly left out part number 7, below?

So you say that if you leave the clutch spring bolts loose, the clutch seems to operate normally? If so than my though above is probably off base.

mystic_1

750goes · « **Reply #4 on:** November 25, 2009, 02:49:08 AM »

mystic
I cannot see part 7 or the link you may have put in.

mick7504 · « **Reply #5 on:** November 25, 2009, 04:47:06 AM »

Another couple of possibilities:
Overall clutch pack too thick. (Total thickness of friction and steel discs)
Generally 7 friction plates and 6 steel discs.

or (see Mystics exploded view)

The splines on part 2 haven't meshed in with splines on part 5.
By rotating part 2 by 1 hole will overcome this.
If the splines haven't meshed properly, the friction discs should be sloppy in the clutch basket whereas they should be clamped firmly together.

mystic_1 · « **Reply #6 on:** November 25, 2009, 05:16:34 AM »

Quote from: 750goes on November 25, 2009, 02:49:08 AM

mystic
I cannot see part 7 or the link you may have put in.

http://www.cmsnl.com/honda-cb750-four-k5-us_model483/partslist/E++09.html

Mick7504 has a good point, improper alignment of the clutch center to the pressure plate was my other thought, but I wasn't sure if it applied in this case given your symptoms. See the following thread for details:

http://forums.sohc4.net/index.php?topic=48103.msg506312#msg506312

mystic_1

75 honda · « **Reply #7 on:** November 25, 2009, 08:33:44 AM »

I have number 7 in that diagram. That would be the bearing or whatever that the adjuster pushes against if I'm not mistaken. If I assemble the disks and plates all together, it all shuts tight together. When I push it into the basket, there is a little bit of play between the disks. Like the back of it goes all the way into the basket and the front stops. However, when I tighten the bolts down it brings them back to being tight again. Ill check the alignment issue and see what that does.

MCRider · « **Reply #8 on:** November 25, 2009, 08:41:45 AM »

Yes I vote for the splines on the clutch center not being aligned with the splines on the pressure plate with the 4 posts on it. AS mentioned by others.

Common mistake. Pull the part with the 4 posts out rotate it 90deg and reinsert. See if it "clicks into alignment. It will be very obvious. Do it again and again till you've tried the 4 possibilities. You'll see the difference easily. It can only go one (maybe 2) way(s).

I will mark the head of a post and a spot on the clutch center when i disassemble so they go back the same way.

75 honda · « **Reply #9 on:** November 25, 2009, 10:11:03 AM »

Its lined up right. Its tight and all together, I just cant seem to get much resistance when I adjust the cable and the adjuster. I hate clutches

MCRider · « **Reply #10 on:** November 25, 2009, 10:20:06 AM »

Quote from: 75 honda on November 25, 2009, 10:11:03 AM

Its lined up right. Its tight and all together, I just cant seem to get much resistance when I adjust the cable and the adjuster. I hate clutches

nothing more to offer than what's been said. Sorry.

The answer is there somewhere.

75 honda · « **Reply #11 on:** November 25, 2009, 11:44:01 AM »

Ill have to keep messing with it. If all else fails I'll just take it to get adjusted. Thanks for the input.

mystic_1 · « **Reply #12 on:** November 25, 2009, 01:44:01 PM »

Just a shot in the dark here, but which way are you turning the clutch adjusting screw?

My Clymer manual incorrectly says to turn the screw counterclockwise until resistance is felt and then back it off 1/4 turn. The manual from Honda4Fun correctly states to turn the screw clockwise.

mystic_1

75 honda · « **Reply #13 on:** November 25, 2009, 02:56:03 PM »

I turn it clockwise to get it to go in. It's almost like it isn't long enough or something. I turn it in and then with the nut all the way loose, the piece that holds the spring and the cable hooks to will start to come towards me, away from the base, so I'll back the screw out some and it will go back in and I'm guessing that means that the adjuster screw is pressing against the bearing in there and forcing it to come out. So I back it out a little, tighten the bolt down, adjust the cables and even the lever will go back to position after I pull it, but I feel no resistance like as if it would be pushing the clutches in.

mystic_1 · « **Reply #14 on:** November 25, 2009, 04:22:35 PM »

Here's what I'd do:

Take the lock nut off the adjusting screw entirely. Now turn the screw inwards, do you reach a point where you feel resistance? If so, back off 1/4 turn from that point, adjust the cable, and see if your clutch operates. If so, how many threads are left showing on the adjuster?

Another thing I'd recommend is to pull the pressure plate out (#5 above) and inspect it carefully, paying particular attention to the backside opposite the screw studs. Sometimes these crack.

mystic_1

75 honda · « **Reply #15 on:** November 25, 2009, 04:54:54 PM »

If I take the nut all the way off, it keeps screwing in until there's not really any threads left for the nut to screw on to. I'm at a loss on this one. I may just take it somewhere. It's probably something simple but I've never messed with hondas before.

mystic_1 · « **Reply #16 on:** November 25, 2009, 05:04:34 PM »

Yeah I'm a bit stumped at this point too. Maybe post some pics of the lifter mechanism (inside) and the clutch pack, and we'll see if we can spot a problem.

mystic_1

75 honda · « **Reply #17 on:** November 25, 2009, 06:57:15 PM »

Will do. I'd rather not take it somewhere cause it was working when I didn't screw the four spring bolts in, but they actually backed out and started grinding against the cover, oops.. So it's gotta be something simple. I'll take pics tomorrow.

mick7504 · « **Reply #18 on:** November 25, 2009, 07:01:53 PM »

Are all of the steel plates the same thickness or is there one that looks like number 6 in the exploded view below?
It is like a double thickness steel plate riveted together.
Is the splined washer (Number 13) installed?

75 honda · « **Reply #19 on:** November 26, 2009, 07:23:43 AM »

There is no riveted plates anywhere, I do have the splined washer installed. I'm going to go through it today step by step and take pictures and hopefully someone will see what the issue is.

mystic_1 · « **Reply #20 on:** November 26, 2009, 07:26:18 AM »

A good thing to do also would be to re-install the old plates and see if there's any difference. You could also measure and compare the stacked heights of the steel and friction discs and compare that way. BTW did you replace the steels or just the friction plates?

mystic_1

75 honda · « **Reply #21 on:** November 26, 2009, 08:08:26 AM »

I just replaced the plates. The steels were okay but the plates where black and burnt up. I have 7 plates and 6 steels or maybe the other way around. Either way it is 6 and 7. I'm going to go take pics right now and try to figure out how to post them on here.

mystic_1 · « **Reply #22 on:** November 26, 2009, 08:43:10 AM »

To post pics you can either use the "Additional Options" feature on the "Post Reply" page, but there's file size limits. You can also upload to Flickr, Photobucket, or the like and link them inline using the "Insert Image" button above the smileys (third from the left).

Like this:

Code: [Select]


[img]http://forums.sohc4.net/avs/avatar_14556.png[/img]

gives you this:

mystic_1

75 honda · « **Reply #23 on:** November 26, 2009, 09:50:35 AM »

I see... Well, I guess I wont need to bother with pictures because I don't know what I did but I took it all back apart and put it back in and tried what was suggested earlier, taking the nut all the way off and screwing the adjuster in. I did that and screwed it in until I felt it press against the bearing. I backed it off about a half of a turn and put the nut back on with plenty of threading room. Screwed the cover back on and adjusted the cable about half an inch out at the bottom and adjusted the rest at the lever and it works. I guess I wasn't holding my mouth right or something, I don't know. Put it in gear and it wont move at all, pull the lever and it will roll until I release the lever and then it stops again just like it should. Amazing. Thanks for the help guys. So far I've split my cases and installed gears and adjusted my clutch with the help of this site and I've never owned a honda before.

mystic_1 · « **Reply #24 on:** November 26, 2009, 09:54:11 AM »

Sweet, glad you got it sorted.

Good news is that keeping your clutch adjusted will be a no-brainer for you from here on out. Practical experience is priceless.

cheers
mystic_1

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Author Topic: 75 750 adjusting the clutch? (Read 3912 times)