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Old 08-26-2013, 11:42 PM   #1
chollo9 OP
Screwed the Pooch
 
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Joined: Jul 2003
Location: Silk Hope, NC
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Awww S#@!

Almost home from work today and something isn't right. Pull away from a third gear corner and revs go up, but forward drive doesn't match. Shit.

I still have some drive, but only if I don't use much throttle. No extra freeplay at the clutch lever, no clutch smell.

Since I'm only one mile away, I ride home. Another stop sign. Down shifts and up shifts fine, and revs match road speed as long as I don't get on the gas hard. Short steep hill right before my last turn. Bike goes up no problem.

Get home and into the shop. Still no clutch smell or extra freeplay. No oil leaking at engine/transmission join (although there may be tomorrow morning).

So I'm thinking these are the possibilities:

Clutch worn out
Clutch oiled from rear main seal or trans input seal leak
Trans output flange nut has come loose
Driveshaft bell nut has come loose

So I'll drive the truck to work tomorrow and probably pull the transmission when I get home.

Any other ideas?
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Old 08-27-2013, 12:50 AM   #2
orangebear
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Sound like the clutch needs changing if there is know free play left.
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Old 08-27-2013, 12:52 AM   #3
Houseoffubar
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I'll put a five on "oiled clutch" especially since it seems to have just come on.
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Old 08-27-2013, 01:02 AM   #4
ME 109
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Quote:
Originally Posted by Houseoffubar View Post
I'll put a five on "oiled clutch" especially since it seems to have just come on.
Likely.
Tranny oil tho.

Chollo, can we all come around and pull your bike apart?
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Old 08-27-2013, 04:30 AM   #5
hardwaregrrl
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Quote:
Originally Posted by ME 109 View Post
Likely.
Tranny oil tho.

Chollo, can we all come around and pull your bike apart?
Party!!!! . Oiled clutch +2 rms. sorry.
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Old 08-27-2013, 04:46 AM   #6
chollo9 OP
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Party at my place! Woo-hoo!

Starts at 6:00 tonight.

We will wait for ME 109 as he will be a little late (if you're flying in, there's an airstrip at a friend's house a few miles away--seriously).

And the offer was for you to come and pull my bike apart. I'll sit and watch.
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Old 08-27-2013, 05:31 AM   #7
ozmoses
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Unless you are stuck. And it's raining...
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Old 08-27-2013, 05:55 AM   #8
ME 109
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Quote:
Originally Posted by hardwaregrrl View Post
Oiled clutch +2 rms. sorry.
Last time I got oil on my clutch plate, it was due to a cracked oil pump cover. Son of a gun had a minute crack in the corner of the counterbore for one of the hex head bolts.
I think that little jobby took four gearbox removals to find. Boxerworks former guru GSPD, suggested running the motor without the tranny and cluch gear. Sure enough, there it was running out the top left bolt hole of the oil pump cover.

Back to Chollo's bike, I'm thinking he'd see oil weeping at the tranny/engine joint before he'd get clutch slip? Prolly same for the tranny seal too.
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Old 08-27-2013, 06:33 AM   #9
JonnyCash
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Sometimes clutches just wear out. One day it isn't slipping, the next day it is. Let's hope thats all it is.
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Old 08-27-2013, 10:09 AM   #10
chollo9 OP
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Peeked at 'er this morning on my way to the salt mine--no wet stuff visible.

So, no new info, but for a little more info, as part of this past winter's rebuild, all of the seals listed above were changed (oil pump cover o-ring too), the clutch was well within spec, and I had all of the other stuff apart also! So this may be a comeback that I have to fix without charging the customer! Bugger!

http://www.youtube.com/watch?v=u91WGac2mbI
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Old 08-28-2013, 04:40 PM   #11
chollo9 OP
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Uh, like, where was everyone last night? I sat there, drinking, and nobody showed. Finally gave up and went inside to watch old episodes of "Weeds".

So tonight I got so far as to remove the transmission before mama rang the dinner bell. No leakage at the input shaft, just a little schmear of spline lube on the seal.

No oil on the shelf under the clutch assembly, only a little grunge.

That's as much inspection as I had time to do, just the obvious stuff. Tomorrow I'll pull the clutch apart and see what's up.

Hopefully I'll take some pics too.
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Old 08-28-2013, 06:01 PM   #12
bikerfish
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what year is the bike? my r100r has the plastic throwout bearing cylinder and when it sticks it is just like having a slipping clutch, but much cheaper and easier to fix. how does the clutch lever feel? smooth or notchy?
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Old 08-28-2013, 06:09 PM   #13
chollo9 OP
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Quote:
Originally Posted by bikerfish View Post
what year is the bike? my r100r has the plastic throwout bearing cylinder and when it sticks it is just like having a slipping clutch, but much cheaper and easier to fix. how does the clutch lever feel? smooth or notchy?
'74 R90/6. Bastardized, but not in the currently offending area.

Clutch lever feels fine, smooth as always.
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Old 08-28-2013, 06:39 PM   #14
disston
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I have adjusted my clutch for several years by putting free play at both ends and making sure the lever is about parallel to the rear cover. has worked great for years. Then I made a metal piece 201mm long and decided to learn the "proper" method to adjsut the clutch. It is not exactly slipping but it doesn't feel as positive as before.

I have a few days off next week. I'm gonna try and sort this out. Maybe I should read the manual.

1975 R90/6 one year old clutch disk
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Old 08-29-2013, 03:33 AM   #15
bikerfish
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ok, you probably have the old throwout bearing setup then, which probably eliminates that as a problem. So, if no evidence of oil on the clutch plate, and it measures within spec, then how about the pressure plate, might be time for a new one, they do lose tension after the years go by.
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