1980 Honda CB650 shift fork lever (foot pedal you use to shift) leaking oil

Matthebrute · 07-11-2012, 05:53 PM

Ok here goes the story

The bike has been "dripping" oil for some time and i believe it is from the same place. i have been meaning to get to it but the funds are tight...

On my way to work this morning i pulled out of the gas station and heard a "snap" throttle pull cable broke...

i had 30 min to get to work and it was 5:50 am who is going to be up and get my ass to work in time...

So i improvised, used the idle adjust/ghetto cruise control on the side to keep the engine reved as i quick shifted trhough and got to work. on my way home did the same thing....

When i got home i went in the house, cracked a cold beer and relaxed a minute. when my wife gets home she says "honey you know your bike is leaking oil" well long story short the "drip" turned into a steady stream.

I am guessing the constant revving and hard shifting blew the rest of whatever gasket/seal that was "dripping"in the first place.

so i go out take off the cover and clean it all up. loocked in my manual and it is called the shift fork lever..anyways..it my shifter.

Ok now my question (sorry if you didnt like my story)

is this a complete breakdown of my ?????? how much do i actually have to break down to get to this. i do have a book but not sure where to start, already skimmed the transmision section and found the removal/install but it was alongside a complete breakdown of my transmission.....

so can it be done without major removal/instalation of tranny?

im assuming no but want to double check before i got and take on my first motorcycle transmission removal,clean and install, alongside the job i will probally be inspecting most clutch components and replacing what is needed.

anyways as always you guys questions and comments are always welcome

thanks
Matt

Dodsfall · 07-11-2012, 08:33 PM

I believe these motorcycles have a removable side cover on the engine that the seal is seated into. If so, the cover needs to be removed, the seal pressed out, a new seal installed, and a new gasket installed on the side cover.

You might have to remove a couple of things such as the foot peg to remove the cover, but it shouldn't be too difficult.

Matthebrute · 07-11-2012, 08:58 PM

already removed the cover and foot peg. the leak is coming from inside where the foot shifter inserts into the transmision housing

Matthebrute · 07-11-2012, 09:05 PM

i am pretty sure it is #4 on this diagram.

http://www.hondapartshouse.com/home....460AE14460A17A

there is no oil in the cover its where the chain hooks onto the drive

Matthebrute · 07-11-2012, 09:06 PM

so im thinking i need part #24 on the diagram.

sorry if i have no clue what im talking about as you know this is my first bike.

thanks for all you help Dods, i cant rep you anymore hehe

Doug Northey · 07-13-2012, 04:50 PM

The early 650's(single overhead cam) had an oil seal on the shifter that was not bad to replace.It could be done with minimal of parts removed.But before you do that be certain that the oil leak is in fact from the shift shaft seal and not from the output shaft seal that is above the shift shaft.Clean up the area and run the engine for a while to see if the oil is coming from the output shaft seal or the shift shaft.Hopefully it is the shift shaft because it is not a hard job.If it is the output shaft seal the engine must be removed and the cases split(the output seal is a lipped seal)due to high oil pressure to the shaft.It is good to remove the drive sprocket so you can see the output shaft seal directly.Then you will be sure that it is or is not leaking.Do not try to remove the output seal w/out splitting the cases.I have had to replace cases back in the day due to some folks prying them out at all costs(big costs).Good luck with your 650.

Matthebrute · 07-14-2012, 04:08 PM

i am almost 100% sure that its the shift shaft seal, i took the cover off and cleaned it out really good and could see the oil coming out right where the shift shaft goes into the case. im a bit relieved that it is not that big of a job, going to check out the manual and see what it tells me.I was almost looking foeward to taking the entire engine andf transmission out of the bike, i would be able to do my valve adjustment while i had it out. but from what i have read you dont need to remove the engine for the valve adjustment either so seems like it may not be as much work as i anticiapted. now i need to get ahold of a carb sync tool and get them squared away and the bike should be in pretty good order.

thanks for the replies
Matt

Matthebrute · 07-15-2012, 03:22 PM

Ok just a littlre update. I got the trottle cable installed and didnt even have to remove the carbs YAY!!

took the drive sprocket off and found that there is a rubber seal that sits on the outside of the shift shaft that had come out of place, i pushed it back into place and just got back with some oil to fill her back up, hopefully it dosent leak and i can continue riding my bike to work tomorow.

I also have a choke cable, the second throttle cable and a steering neck bearing that are all on order that i need to do but thats a project for next weekend. I also plan on painting my bike sometime soon so the guys at work will stop calling me Barney (you know the purple dinasour) because my bike and helmet are both purple lol

Dodsfall · 07-15-2012, 04:22 PM

Purple might stand out in traffic, which could be a good thing.

Matthebrute · 07-15-2012, 08:51 PM

i was thinking silver with black decals...yeah safety is great but man i want to have a nice looking bike, tired of riding the paint chipped purple dino LOL

Dodsfall · 07-15-2012, 10:25 PM

I would probably balk at purple too.

Matthebrute · 07-16-2012, 05:11 PM

OK so i have a issu. was going to start another thread but figure ill just give it a shot in here first.

my bike is running excellent except it has NO power at all, nothing like it used to. all i did was change the throttle cable and push that shift lever oil seal back into place, i didnt do anything to the fuel system.

now when i give the bike some throttle it just kinda sputters and sounds like ****. i back off the throttle a bit and it sounds fine....fuel flow seems to be fine through the in line filter. Im baffled on this one...any thoughts? Im really only concerned with this as a safety issue, because if i need to give it some to avoid a hazzard on the road and speeding up is a better move than slowing down i wont be able to (sounds kinda dumb but sometimes slowing down can be more dangerous)

07-11-2012, 05:53 PM	#1
Matthebrute Master At Arms Join Date: May 2012 Location: Skowhegan, ME Posts: 109	1980 Honda CB650 shift fork lever (foot pedal you use to shift) leaking oil Ok here goes the story The bike has been "dripping" oil for some time and i believe it is from the same place. i have been meaning to get to it but the funds are tight... On my way to work this morning i pulled out of the gas station and heard a "snap" throttle pull cable broke... i had 30 min to get to work and it was 5:50 am who is going to be up and get my ass to work in time... So i improvised, used the idle adjust/ghetto cruise control on the side to keep the engine reved as i quick shifted trhough and got to work. on my way home did the same thing.... When i got home i went in the house, cracked a cold beer and relaxed a minute. when my wife gets home she says "honey you know your bike is leaking oil" well long story short the "drip" turned into a steady stream. I am guessing the constant revving and hard shifting blew the rest of whatever gasket/seal that was "dripping"in the first place. so i go out take off the cover and clean it all up. loocked in my manual and it is called the shift fork lever..anyways..it my shifter. Ok now my question (sorry if you didnt like my story) is this a complete breakdown of my ?????? how much do i actually have to break down to get to this. i do have a book but not sure where to start, already skimmed the transmision section and found the removal/install but it was alongside a complete breakdown of my transmission..... so can it be done without major removal/instalation of tranny? im assuming no but want to double check before i got and take on my first motorcycle transmission removal,clean and install, alongside the job i will probally be inspecting most clutch components and replacing what is needed. anyways as always you guys questions and comments are always welcome thanks Matt

07-13-2012, 04:50 PM	#6
Doug Northey Verified Join Date: Nov 2010 Posts: 62	oil leak The early 650's(single overhead cam) had an oil seal on the shifter that was not bad to replace.It could be done with minimal of parts removed.But before you do that be certain that the oil leak is in fact from the shift shaft seal and not from the output shaft seal that is above the shift shaft.Clean up the area and run the engine for a while to see if the oil is coming from the output shaft seal or the shift shaft.Hopefully it is the shift shaft because it is not a hard job.If it is the output shaft seal the engine must be removed and the cases split(the output seal is a lipped seal)due to high oil pressure to the shaft.It is good to remove the drive sprocket so you can see the output shaft seal directly.Then you will be sure that it is or is not leaking.Do not try to remove the output seal w/out splitting the cases.I have had to replace cases back in the day due to some folks prying them out at all costs(big costs).Good luck with your 650.

07-15-2012, 04:22 PM	#9
Dodsfall Administrator Join Date: May 2008 Location: Illinois, USA Posts: 15,834	Purple might stand out in traffic, which could be a good thing. __________________ 2008 XL1200R To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

07-15-2012, 10:25 PM	#11
Dodsfall Administrator Join Date: May 2008 Location: Illinois, USA Posts: 15,834	I would probably balk at purple too. __________________ 2008 XL1200R To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

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07-11-2012, 08:33 PM	#2
Dodsfall Administrator Join Date: May 2008 Location: Illinois, USA Posts: 15,834	I believe these motorcycles have a removable side cover on the engine that the seal is seated into. If so, the cover needs to be removed, the seal pressed out, a new seal installed, and a new gasket installed on the side cover. You might have to remove a couple of things such as the foot peg to remove the cover, but it shouldn't be too difficult. __________________ 2008 XL1200R To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

07-11-2012, 08:58 PM	#3
Matthebrute Master At Arms Join Date: May 2012 Location: Skowhegan, ME Posts: 109	already removed the cover and foot peg. the leak is coming from inside where the foot shifter inserts into the transmision housing

07-11-2012, 09:05 PM	#4
Matthebrute Master At Arms Join Date: May 2012 Location: Skowhegan, ME Posts: 109	i am pretty sure it is #4 on this diagram. http://www.hondapartshouse.com/home....460AE14460A17A there is no oil in the cover its where the chain hooks onto the drive

07-11-2012, 09:06 PM	#5
Matthebrute Master At Arms Join Date: May 2012 Location: Skowhegan, ME Posts: 109	so im thinking i need part #24 on the diagram. sorry if i have no clue what im talking about as you know this is my first bike. thanks for all you help Dods, i cant rep you anymore hehe

07-14-2012, 04:08 PM	#7
Matthebrute Master At Arms Join Date: May 2012 Location: Skowhegan, ME Posts: 109	i am almost 100% sure that its the shift shaft seal, i took the cover off and cleaned it out really good and could see the oil coming out right where the shift shaft goes into the case. im a bit relieved that it is not that big of a job, going to check out the manual and see what it tells me.I was almost looking foeward to taking the entire engine andf transmission out of the bike, i would be able to do my valve adjustment while i had it out. but from what i have read you dont need to remove the engine for the valve adjustment either so seems like it may not be as much work as i anticiapted. now i need to get ahold of a carb sync tool and get them squared away and the bike should be in pretty good order. thanks for the replies Matt

07-15-2012, 03:22 PM	#8
Matthebrute Master At Arms Join Date: May 2012 Location: Skowhegan, ME Posts: 109	Ok just a littlre update. I got the trottle cable installed and didnt even have to remove the carbs YAY!! took the drive sprocket off and found that there is a rubber seal that sits on the outside of the shift shaft that had come out of place, i pushed it back into place and just got back with some oil to fill her back up, hopefully it dosent leak and i can continue riding my bike to work tomorow. I also have a choke cable, the second throttle cable and a steering neck bearing that are all on order that i need to do but thats a project for next weekend. I also plan on painting my bike sometime soon so the guys at work will stop calling me Barney (you know the purple dinasour) because my bike and helmet are both purple lol

07-15-2012, 08:51 PM	#10
Matthebrute Master At Arms Join Date: May 2012 Location: Skowhegan, ME Posts: 109	i was thinking silver with black decals...yeah safety is great but man i want to have a nice looking bike, tired of riding the paint chipped purple dino LOL

07-16-2012, 05:11 PM	#12
Matthebrute Master At Arms Join Date: May 2012 Location: Skowhegan, ME Posts: 109	OK so i have a issu. was going to start another thread but figure ill just give it a shot in here first. my bike is running excellent except it has NO power at all, nothing like it used to. all i did was change the throttle cable and push that shift lever oil seal back into place, i didnt do anything to the fuel system. now when i give the bike some throttle it just kinda sputters and sounds like ****. i back off the throttle a bit and it sounds fine....fuel flow seems to be fine through the in line filter. Im baffled on this one...any thoughts? Im really only concerned with this as a safety issue, because if i need to give it some to avoid a hazzard on the road and speeding up is a better move than slowing down i wont be able to (sounds kinda dumb but sometimes slowing down can be more dangerous)