cb750 has no 5th gear?

classic Classic list List threaded Threaded
16 messages Options
Reply | Threaded
Open this post in threaded view
|

cb750 has no 5th gear?

spektre

 So here is my 1980 cb750f i got for 800 bucks in august after working my ass off on a farm. Everything works great on it. I've tipped it about 3 times in the process of learning since this is my first bike. The only problem with it is it only has 4 gears. In the owners manual and online it states that this is a 5 speed bike. Is there something wrong? and what should i do? The gears are very long on this machine and it seems like a 5 gear isnt neccesary. Thanks for any reply or help i get.
Reply | Threaded
Open this post in threaded view
|

Re: cb750 has no 5th gear?

sgtslag
First, and foremost...  Take the Motorcycle Basic Safety Training Course.  It is taught nearly everywhere, and the skills you learn, will serve you for the rest of your life -- they will save your life countless times!

With regards to your bike, yes, it should be a five-speed transmission.  Chances are that this bike has been neglected for some time.  Here is a laundry list of things to do first, to clean it up (internally), and get it ready for more advanced work:

0)  Download, and read, the Factory Service Manual, and make a plan to go through the maintenance/lubrication page, start to finish, on your bike.

1)  Change the oil -- it is shared by the engine, and the transmission, and it is cheap!  Buy the cheapest oil at Wal-Mart -- you won't leave it in there very long, so don't worry.

2)  Buy two cans of Sea Foam gas/oil additive at Wal-Mart, too.  Follow the directions and add it to both the crankcase (oil) and the gas tank (fill the gas tank to the top after adding the Sea Foam).  Run it for 5-10 minutes, around the block, or just idling, to circulate it throughout the engine/transmission, and the gas circuit.  Let it sit for 2-3 days, so the Sea Foam can dissolve deposits within the gas tank, and the engine/transmission.

3)  Change the very-likely-now-black oil with Shell Rotella T6 Synthetic ($19/gallon at Wal-Mart):  Sea Foam dissolves carbon, and varnish deposits inside the engine and transmission, which will turn your caramel-colored oil black -- time for a change.  This stuff has no friction modifiers to mess with your clutch; it is rated at 5W-40; it won't break down until it reaches 400 F+ degrees, where the conventional oil will break down above 250 F (these engines run, typically, at 250 F...), into carbon, and varnish; it has a very high level of detergents which will help keep your engine/transmission clean.  Change this oil every 3,000-5,000 miles.

4)  Check the tension/condition of your chain, and tires -- replace as necessary!

5)  Ride your bike for an hour, to push the Sea Foam'ed gas through the carbs and the tank, to make certain everything is flushed out.

6)  After this, you will need more advanced help, especially if your transmission is still only shifting through four gears, not five.

There are many more things you can/should do, but this will get you started.  Cheers!
1979 CB750K (sold, 2012, but not forgotten)
1983 Kawasaki 440 LTD Belt Drive (sold, 2011)
1993 Kawasaki Voyager XII
Reply | Threaded
Open this post in threaded view
|

Re: cb750 has no 5th gear?

DesignBuild
The above is all very good advice, but first and foremost since your a new rider (i haven't been riding all too long either), make sure your not just shifting into 2nd from the start thinking you only have four gears.

Down shift is first, Neutral is in between 1st and 2nd.

I know this seems way too basic, but as a new rider it's an easy mistake to make, especially if no one has told you any better. And yes I'll admit i know this from experience, haha...

Then follow all the above.

Good luck!
Reply | Threaded
Open this post in threaded view
|

Re: cb750 has no 5th gear?

spektre
In reply to this post by spektre
I've had my endorsement and manual since the day after I bought the bike around 5 months ago. Ive been riding pretty much everyday since and I know where first gear is but thanks. What Im confused now about is the sea foam...I just put it in with gas and oil? change it out for new oil and bam my 5th gear is working? I've never had a problem with the transmission.
thanks guys
Reply | Threaded
Open this post in threaded view
|

Re: cb750 has no 5th gear?

sgtslag
My suggestion with SeaFoam in the engine is not that it will miraculously fix a broken transmission, but that it will dissolve any varnish/sludge, which *might* be causing it to hang up.  It can't hurt.  I suspect that if you don't have 5th gear working, there is a mechanical issue.  The SeaFoam is just a cheap way of ensuring things are clean, and free of crud, without cracking the engine case.  It's a cheap treatment that won't do any harm. Cheers!
1979 CB750K (sold, 2012, but not forgotten)
1983 Kawasaki 440 LTD Belt Drive (sold, 2011)
1993 Kawasaki Voyager XII
Reply | Threaded
Open this post in threaded view
|

Re: cb750 has no 5th gear?

Edshu7
In reply to this post by spektre
Did you ever resolve this problem? What did you find out? I recently bought a cb750 and it is not engaging 5th.  My father who is an avid biker has confirmed that I'm not crazy.
Any help would be appreciated  

Ed-
1980 CB750C
Reply | Threaded
Open this post in threaded view
|

Re: cb750 has no 5th gear?

spektre
I felt stupid after I figured it out. I just adjusted the shifter.

Sent from my Verizon 4G LTE Smartphone

----- Reply message -----
From: "Edshu7 [via Honda CB750'S]" <ml-node+[hidden email]>
To: "spektre" <[hidden email]>
Subject: cb750 has no 5th gear?
Date: Thu, Aug 20, 2015 10:56 AM

Did you ever resolve this problem? What did you find out? I recently bought a cb750 and it is not engaging 5th.  My father who is an avid biker has confirmed that I'm not crazy.
Any help would be appreciated  

Ed-
1980 CB750C


If you reply to this email, your message will be added to the discussion below:
http://honda-cb750-s.456789.n3.nabble.com/cb750-has-no-5th-gear-tp2246884p4058198.html
To unsubscribe from cb750 has no 5th gear?, click here.
NAML
Reply | Threaded
Open this post in threaded view
|

Re: cb750 has no 5th gear?

Edshu7
Hope it's that easy for me, thanks a lot.

Sent from my iPhone

On Aug 20, 2015, at 14:00, spektre [via Honda CB750'S] <[hidden email]> wrote:

I felt stupid after I figured it out. I just adjusted the shifter.

Sent from my Verizon 4G LTE Smartphone

----- Reply message -----
From: "Edshu7 [via Honda CB750'S]" <ml-node+[hidden email]>
To: "spektre" <[hidden email]>
Subject: cb750 has no 5th gear?
Date: Thu, Aug 20, 2015 10:56 AM

Did you ever resolve this problem? What did you find out? I recently bought a cb750 and it is not engaging 5th.  My father who is an avid biker has confirmed that I'm not crazy.
Any help would be appreciated  

Ed-
1980 CB750C


If you reply to this email, your message will be added to the discussion below:
http://honda-cb750-s.456789.n3.nabble.com/cb750-has-no-5th-gear-tp2246884p4058198.html
To unsubscribe from cb750 has no 5th gear?, click here.
NAML



If you reply to this email, your message will be added to the discussion below:
http://honda-cb750-s.456789.n3.nabble.com/cb750-has-no-5th-gear-tp2246884p4058199.html
To unsubscribe from cb750 has no 5th gear?, click here.
NAML
Reply | Threaded
Open this post in threaded view
|

Re: cb750 has no 5th gear?

Edshu7
In reply to this post by spektre
You wouldn't by any chance remember how you adjusted it? Like in what way.

Sent from my iPhone

On Aug 20, 2015, at 14:00, spektre [via Honda CB750'S] <[hidden email]> wrote:

I felt stupid after I figured it out. I just adjusted the shifter.

Sent from my Verizon 4G LTE Smartphone

----- Reply message -----
From: "Edshu7 [via Honda CB750'S]" <ml-node+[hidden email]>
To: "spektre" <[hidden email]>
Subject: cb750 has no 5th gear?
Date: Thu, Aug 20, 2015 10:56 AM

Did you ever resolve this problem? What did you find out? I recently bought a cb750 and it is not engaging 5th.  My father who is an avid biker has confirmed that I'm not crazy.
Any help would be appreciated  

Ed-
1980 CB750C


If you reply to this email, your message will be added to the discussion below:
http://honda-cb750-s.456789.n3.nabble.com/cb750-has-no-5th-gear-tp2246884p4058198.html
To unsubscribe from cb750 has no 5th gear?, click here.
NAML



If you reply to this email, your message will be added to the discussion below:
http://honda-cb750-s.456789.n3.nabble.com/cb750-has-no-5th-gear-tp2246884p4058199.html
To unsubscribe from cb750 has no 5th gear?, click here.
NAML
Reply | Threaded
Open this post in threaded view
|

Re: cb750 has no 5th gear?

shinyribs
Administrator
Edshu7 wrote
You wouldn't by any chance remember how you adjusted it? Like in what way.


I would be very interested in this information myself, as I know of zero ways to adjust shifter linkage on these bikes.
Reply | Threaded
Open this post in threaded view
|

Re: cb750 has no 5th gear?

spektre
I moved it down so when it would get more leverage with my foot while shifting up

Sent from my Verizon 4G LTE Smartphone

----- Reply message -----
From: "shinyribs [via Honda CB750'S]" <ml-node+[hidden email]>
To: "spektre" <[hidden email]>
Subject: cb750 has no 5th gear?
Date: Thu, Aug 20, 2015 6:47 PM

Edshu7 wrote
You wouldn't by any chance remember how you adjusted it? Like in what way.


I would be very interested in this information myself, as I know of zero ways to adjust shifter linkage on these bikes.
A free people ought not only be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government.~George Washington






If you reply to this email, your message will be added to the discussion below:
http://honda-cb750-s.456789.n3.nabble.com/cb750-has-no-5th-gear-tp2246884p4058212.html
To unsubscribe from cb750 has no 5th gear?, click here.
NAML
Reply | Threaded
Open this post in threaded view
|

Re: cb750 has no 5th gear?

Edshu7
Thanks bud

Sent from my iPhone

On Aug 20, 2015, at 23:15, spektre [via Honda CB750'S] <[hidden email]> wrote:

I moved it down so when it would get more leverage with my foot while shifting up

Sent from my Verizon 4G LTE Smartphone

----- Reply message -----
From: "shinyribs [via Honda CB750'S]" <ml-node+[hidden email]>
To: "spektre" <[hidden email]>
Subject: cb750 has no 5th gear?
Date: Thu, Aug 20, 2015 6:47 PM

Edshu7 wrote
You wouldn't by any chance remember how you adjusted it? Like in what way.


I would be very interested in this information myself, as I know of zero ways to adjust shifter linkage on these bikes.
A free people ought not only be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government.~George Washington






If you reply to this email, your message will be added to the discussion below:
http://honda-cb750-s.456789.n3.nabble.com/cb750-has-no-5th-gear-tp2246884p4058212.html
To unsubscribe from cb750 has no 5th gear?, click here.
NAML



If you reply to this email, your message will be added to the discussion below:
http://honda-cb750-s.456789.n3.nabble.com/cb750-has-no-5th-gear-tp2246884p4058222.html
To unsubscribe from cb750 has no 5th gear?, click here.
NAML
Reply | Threaded
Open this post in threaded view
|

Re: cb750 has no 5th gear?

spektre
Did it work

Sent from my Verizon 4G LTE Smartphone

----- Reply message -----
From: "Edshu7 [via Honda CB750'S]" <ml-node+[hidden email]>
To: "spektre" <[hidden email]>
Subject: cb750 has no 5th gear?
Date: Fri, Aug 21, 2015 4:29 AM

Thanks bud

Sent from my iPhone

On Aug 20, 2015, at 23:15, spektre [via Honda CB750'S] <[hidden email]> wrote:

I moved it down so when it would get more leverage with my foot while shifting up

Sent from my Verizon 4G LTE Smartphone

----- Reply message -----
From: "shinyribs [via Honda CB750'S]" <ml-node+[hidden email]>
To: "spektre" <[hidden email]>
Subject: cb750 has no 5th gear?
Date: Thu, Aug 20, 2015 6:47 PM

Edshu7 wrote
You wouldn't by any chance remember how you adjusted it? Like in what way.


I would be very interested in this information myself, as I know of zero ways to adjust shifter linkage on these bikes.
A free people ought not only be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government.~George Washington






If you reply to this email, your message will be added to the discussion below:
http://honda-cb750-s.456789.n3.nabble.com/cb750-has-no-5th-gear-tp2246884p4058212.html
To unsubscribe from cb750 has no 5th gear?, click here.
NAML



If you reply to this email, your message will be added to the discussion below:
http://honda-cb750-s.456789.n3.nabble.com/cb750-has-no-5th-gear-tp2246884p4058222.html
To unsubscribe from cb750 has no 5th gear?, click here.
NAML



If you reply to this email, your message will be added to the discussion below:
http://honda-cb750-s.456789.n3.nabble.com/cb750-has-no-5th-gear-tp2246884p4058242.html
To unsubscribe from cb750 has no 5th gear?, click here.
NAML
Reply | Threaded
Open this post in threaded view
|

Re: cb750 has no 5th gear?

Edshu7
Haven't had a chance to try yet.

Sent from my iPhone

On Aug 21, 2015, at 11:15, spektre [via Honda CB750'S] <[hidden email]> wrote:

Did it work

Sent from my Verizon 4G LTE Smartphone

----- Reply message -----
From: "Edshu7 [via Honda CB750'S]" <ml-node+[hidden email]>
To: "spektre" <[hidden email]>
Subject: cb750 has no 5th gear?
Date: Fri, Aug 21, 2015 4:29 AM

Thanks bud

Sent from my iPhone

On Aug 20, 2015, at 23:15, spektre [via Honda CB750'S] <[hidden email]> wrote:

I moved it down so when it would get more leverage with my foot while shifting up

Sent from my Verizon 4G LTE Smartphone

----- Reply message -----
From: "shinyribs [via Honda CB750'S]" <ml-node+[hidden email]>
To: "spektre" <[hidden email]>
Subject: cb750 has no 5th gear?
Date: Thu, Aug 20, 2015 6:47 PM

Edshu7 wrote
You wouldn't by any chance remember how you adjusted it? Like in what way.


I would be very interested in this information myself, as I know of zero ways to adjust shifter linkage on these bikes.
A free people ought not only be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government.~George Washington






If you reply to this email, your message will be added to the discussion below:
http://honda-cb750-s.456789.n3.nabble.com/cb750-has-no-5th-gear-tp2246884p4058212.html
To unsubscribe from cb750 has no 5th gear?, click here.
NAML



If you reply to this email, your message will be added to the discussion below:
http://honda-cb750-s.456789.n3.nabble.com/cb750-has-no-5th-gear-tp2246884p4058222.html
To unsubscribe from cb750 has no 5th gear?, click here.
NAML



If you reply to this email, your message will be added to the discussion below:
http://honda-cb750-s.456789.n3.nabble.com/cb750-has-no-5th-gear-tp2246884p4058242.html
To unsubscribe from cb750 has no 5th gear?, click here.
NAML



If you reply to this email, your message will be added to the discussion below:
http://honda-cb750-s.456789.n3.nabble.com/cb750-has-no-5th-gear-tp2246884p4058247.html
To unsubscribe from cb750 has no 5th gear?, click here.
NAML
Reply | Threaded
Open this post in threaded view
|

Re: cb750 has no 5th gear?

shinyribs
Administrator
Be careful with that. The DOHC bikes have a punch mark on the shift lever and another punch mark on the shift shaft. You align those marks because there is a wide spot in the splines that only allows the shift lever to go on in one certain position. If you force it on in another position to may damage the spline on the shift shaft, and you'll be opening cases to fix that.

Maybe not all DOHC's are the same, but the ones I've seen don't allow you to mount the shift lever other than factory location. Just my $0.02
Reply | Threaded
Open this post in threaded view
|

Re: cb750 has no 5th gear?

Edshu7
Much appreciated, I'll def keep that in mind!

Sent from my iPhone

On Aug 21, 2015, at 22:55, shinyribs [via Honda CB750'S] <[hidden email]> wrote:

Be careful with that. The DOHC bikes have a punch mark on the shift lever and another punch mark on the shift shaft. You align those marks because there is a wide spot in the splines that only allows the shift lever to go on in one certain position. If you force it on in another position to may damage the spline on the shift shaft, and you'll be opening cases to fix that.

Maybe not all DOHC's are the same, but the ones I've seen don't allow you to mount the shift lever other than factory location. Just my $0.02
A free people ought not only be armed and disciplined, but they should have sufficient arms and ammunition to maintain a status of independence from any who might attempt to abuse them, which would include their own government.~George Washington






If you reply to this email, your message will be added to the discussion below:
http://honda-cb750-s.456789.n3.nabble.com/cb750-has-no-5th-gear-tp2246884p4058255.html
To unsubscribe from cb750 has no 5th gear?, click here.
NAML