Need your help please - oil leak!
Need your help please - oil leak!
Hi guys
I'm the proud owner of a Honda CB650 Nighthawk from 1983, I picked it up two weeks ago.
My knowledge of engines and bikes is very limited so I would appreciate some help with diagnosing an oil leak.
I'll be honest and say I'm not even sure what you call the part of the engine the oil appears to be leaking from, from looking online I think it's between the alternator and engine on the left hand side of the bike. I have included photos.
I really appreciate any help you can give me, do I need a new gasket? What is that small hole the oil seems to be leaking from?
Thank you in advance.
I'm the proud owner of a Honda CB650 Nighthawk from 1983, I picked it up two weeks ago.
My knowledge of engines and bikes is very limited so I would appreciate some help with diagnosing an oil leak.
I'll be honest and say I'm not even sure what you call the part of the engine the oil appears to be leaking from, from looking online I think it's between the alternator and engine on the left hand side of the bike. I have included photos.
I really appreciate any help you can give me, do I need a new gasket? What is that small hole the oil seems to be leaking from?
Thank you in advance.
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Re: Need your help please - oil leak!
Let me start by saying I am not very familiar with the Nighthawk layout.
That being said, based on looking at the parts fiche for this bike, I do not believe there should be oil behind that cover. All the oil should be kept out of there by an oil seal on the alternator shaft. If oil is leaking out from this cover, I'd wager that oil seal needs replacing.
That being said, based on looking at the parts fiche for this bike, I do not believe there should be oil behind that cover. All the oil should be kept out of there by an oil seal on the alternator shaft. If oil is leaking out from this cover, I'd wager that oil seal needs replacing.
Have a problem with your CB650? Have a technical question? Click here!
My Current Bikes: 2005 HD FLHTCUI Electra Glide Ultra Classic, 2007 Yamaha Vino,
My Current Bikes: 2005 HD FLHTCUI Electra Glide Ultra Classic, 2007 Yamaha Vino,
Re: Need your help please - oil leak!
+1 on the leaking seal. Doesn't look like a difficult job.
Re: Need your help please - oil leak!
Thanks for the response guys, everything helps as this is all new to me, I have not a clue about engines.
From what you said do you think the oil seal (number 12 in this alternator schematic) is the part I need? Maybe the o-ring at number 13 as well?
http://www.cmsnl.com/honda-cb650sc-nigh ... ml#results
Cheers again
From what you said do you think the oil seal (number 12 in this alternator schematic) is the part I need? Maybe the o-ring at number 13 as well?
http://www.cmsnl.com/honda-cb650sc-nigh ... ml#results
Cheers again
Re: Need your help please - oil leak!
Here is the alternator schematic
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Re: Need your help please - oil leak!
Yep. Number 12 was the one I was seeing. While you are there, might as well get the 13 as well.
Have a problem with your CB650? Have a technical question? Click here!
My Current Bikes: 2005 HD FLHTCUI Electra Glide Ultra Classic, 2007 Yamaha Vino,
My Current Bikes: 2005 HD FLHTCUI Electra Glide Ultra Classic, 2007 Yamaha Vino,
Re: Need your help please - oil leak!
Folsoml wrote:Yep. Number 12 was the one I was seeing. While you are there, might as well get the 13 as well.
Thanks Folsoml, I will order both.
Re: Need your help please - oil leak!
I agree, do both while you are in there.
Re: Need your help please - oil leak!
navydad wrote:I agree, do both while you are in there.
Yes Sir *Salutes sharply*
Permission to carry on?
Re: Need your help please - oil leak!
Hi guys
I have the oil seal and o-ring changed, my first job ever on an engine and it went very well.
I used a 16 x 1.5 bolt as a flywheel puller and it done the job. Happy to say it fixed my leak was a good learning experience.
I will include some photos to help others in the same situation.
I have the oil seal and o-ring changed, my first job ever on an engine and it went very well.
I used a 16 x 1.5 bolt as a flywheel puller and it done the job. Happy to say it fixed my leak was a good learning experience.
I will include some photos to help others in the same situation.
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Re: Need your help please - oil leak!
MrRiver wrote:Hi guys
I have the oil seal and o-ring changed, my first job ever on an engine and it went very well.
I used a 16 x 1.5 bolt as a flywheel puller and it done the job. Happy to say it fixed my leak was a good learning experience.
I will include some photos to help others in the same situation.
Thanks for all the Pics and good job !
Re: Need your help please - oil leak!
Hi,
Thanks for sharing this! I had an identical oil leak on my 1985 CB650SC Nighthawk and with the help of this post I fixed it:)
Thanks for sharing this! I had an identical oil leak on my 1985 CB650SC Nighthawk and with the help of this post I fixed it:)
Re: Need your help please - oil leak!
Welcome here!
Good to have some feedback like yours from time to time as the activities in this forum became quite low in the past years.
So this forum still seems to be of some use.
Good to have some feedback like yours from time to time as the activities in this forum became quite low in the past years.
So this forum still seems to be of some use.
Cosky's great (free) online manual: http://cosky0.tripod.com
forum links to common technical issues
If you really like this site and you would not like to see it vanish soon, have a look there: Urgent: Future of HondaCB650.com Forum
forum links to common technical issues
If you really like this site and you would not like to see it vanish soon, have a look there: Urgent: Future of HondaCB650.com Forum
Re: Need your help please - oil leak!
Yes agreed, I'm glad this could help someone, I've since sold my Nighthawk but we had some amazing adventures together, great wee bike!
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