Author Topic: Running motor with LH sidecover removed.  (Read 198 times)

Offline AndyH

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Running motor with LH sidecover removed.
« on: June 11, 2018, 11:43:16 AM »
Hi folks, I'm preparing to replace a leaking gear shift spindle seal on my 500K1 and want to check that the clutch pushrod seal and counter sprocket shaft seal aren't leaking as well.  They don't appear to be, but can I run up the motor to warm/distribute the oil to help with diagnosis with the crankcase cover removed?
Andy

1972 CB500 Four K1 (AUS version) 8)
Previously owned..
1967 Honda Sports 90
1971 Yamaha CT2 175
1973 Yamaha RD250
1975 Kawasaki KX125
1979 Yamaha XT250T
BMW R65
BMW R80
BMW R100LT

Online hairygit

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Re: Running motor with LH sidecover removed.
« Reply #1 on: June 11, 2018, 11:51:41 AM »
Being a 500/4, I'd say yes, probably be a good idea to clean all the road dirt and gunge thrown off the chain in there, that way with it clean and dry any leak will show itself clearly.
If it's got tits or wheels, it's hassle, if it's got both, RUN!!!

Offline Oddjob

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Re: Running motor with LH sidecover removed.
« Reply #2 on: June 11, 2018, 11:30:25 PM »
If you mean the sprocket cover then yes, however if you mean the generator cover then not advised. You say crankcase cover but it's important to say which one you mean. I'm fairly sure you mean the sprocket cover but you can never be too careful.
Don't play stupid with me, I'm better at it

Offline AndyH

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Re: Running motor with LH sidecover removed.
« Reply #3 on: June 12, 2018, 01:52:58 AM »
If you mean the sprocket cover then yes, however if you mean the generator cover then not advised. You say crankcase cover but it's important to say which one you mean. I'm fairly sure you mean the sprocket cover but you can never be too careful.

Hi mate, I mentioned LH (left hand) side cover in the title and the clutch pushrod seal and countershaft sprocket seal (which I mentioned in post) are also under the same sidecover as is the gearshift spindle seal.  :P
Andy

1972 CB500 Four K1 (AUS version) 8)
Previously owned..
1967 Honda Sports 90
1971 Yamaha CT2 175
1973 Yamaha RD250
1975 Kawasaki KX125
1979 Yamaha XT250T
BMW R65
BMW R80
BMW R100LT

Offline Oddjob

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Re: Running motor with LH sidecover removed.
« Reply #4 on: June 12, 2018, 03:25:35 AM »
Yeah got that Andy BUT you could be rebuilding the engine and testing the seals for leaks whilst the generator cover was off as well, if you've ever started the engine with the generator cover off you'll know why I was making sure it was just the sprocket cover.
Don't play stupid with me, I'm better at it

Offline AndyH

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Re: Running motor with LH sidecover removed.
« Reply #5 on: June 12, 2018, 06:18:30 AM »
Yeah got that Andy BUT you could be rebuilding the engine and testing the seals for leaks whilst the generator cover was off as well, if you've ever started the engine with the generator cover off you'll know why I was making sure it was just the sprocket cover.

Fair enough mate!  All good.  I've fired up the motor and can't discern any leaks from other than the gearshift spindle seal.  I'll replace them all nonetheless.
Andy

1972 CB500 Four K1 (AUS version) 8)
Previously owned..
1967 Honda Sports 90
1971 Yamaha CT2 175
1973 Yamaha RD250
1975 Kawasaki KX125
1979 Yamaha XT250T
BMW R65
BMW R80
BMW R100LT

Offline Bryanj

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Re: Running motor with LH sidecover removed.
« Reply #6 on: June 12, 2018, 12:19:59 PM »
Don't forget to tape up the shaft spline and clean the shaft or you will damage the seal lip when fitting

Offline SteveW

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Re: Running motor with LH sidecover removed.
« Reply #7 on: June 12, 2018, 02:07:19 PM »
Did mine on Sunday, i removed the old seal by drilling into it with a tiny drill bit on low speed. Once the bit was through it just grabbed the seal and pulled it free.

Best thing i found to clean out the recess was cotton buds.

My gear shift shaft had burrs on it from where the chain had been rubbing on it, the previous owner must have been riding with the chain very, very loose.
1974 CB550 K0
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Offline AndyH

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Re: Running motor with LH sidecover removed.
« Reply #8 on: June 13, 2018, 01:46:09 AM »
Don't forget to tape up the shaft spline and clean the shaft or you will damage the seal lip when fitting

Will do.
As luck would have it, the one seal I don't have is the clutch pushrod seal (which I thought I had. :( )
Andy

1972 CB500 Four K1 (AUS version) 8)
Previously owned..
1967 Honda Sports 90
1971 Yamaha CT2 175
1973 Yamaha RD250
1975 Kawasaki KX125
1979 Yamaha XT250T
BMW R65
BMW R80
BMW R100LT