Hello, new to site

[bikertucker]

My name is Tim, helping a friend who bought a 75 CB750. Jumps out of 2nd and 3rd gear.
was looking for search function,to allow me to see if someone else posted with same problem.
If anyone could help me, hat would be great.

Thanks

[TOOLS1]

Hey Tim, Welcome to the forum. What year, and model bike is it?
TOOLS

[Half-Caf]

bikertucker wrote

was looking for search function,to allow me to see if someone else posted with same problem.

Search button is to the right of the Honda emblem on the main page.
Also, clicking on this link might make it a bit easier.

[bikertucker]

It's a 1975 CB750, my friend is 82 and knows his many years of riding are comming to a close.
But would enjoy riding this bike. I would like to help him out. A local shop has tried twice,
took it apart a third time . That is what I have to work with, four boxes of parts.

[TOOLS1]

If I were, you. I would just replace the transmission. It's not hard. If, you just remove the engine, and turn it over. Then remove the bottom half of the case, and take the gear cluster out. Then just drop the new/good one in.
TOOLS

[bikertucker]

Afraid that was already tried by the local shop. At first it only slipped out of thrid gear. After the
transmission was changed out, it slipped out of 2nd and 3rd. Have measured shifting forks and
drum. They are in spec, can not detect any bent or obvious bad parts. The shifting assembly
is just a box of parts, not sure how it all goes together. Any links I can go to for detailed
assistance??

[TOOLS1]

If I had a nickle, for every time I heard "Just had it at a shop" Friend of mine had his at the shop because it was hard to get into neutral. Now it is even harder to get into neutral. Bikebandit has break downs of the parts assembly on their site.
TOOLS

[bikertucker]

My friend gave me a Chilton's Repair manual. In it a statement is made that the " Shift Mechanism"
can cause the transmission to slip out of gear. But like most self help books, give no insight as to
what to look for, or how it can allow the transmission to slip. I do have the Honda parts display, but
was hoping for some guidance on what to look for. I'm not too confident changing one set of decades
old parts with another set of decades old parts will solve the problem.

Thanks

Tim

[rrgunslinger]

Could be the cog on the gear. Gears are held together by constant pressure from the motor. If worn they slip apart.

Harvey

On Mar 11, 2012 9:14 AM, "bikertucker [via Honda CB750&apos;S]" <[hidden email]> wrote:

My friend gave me a Chilton's Repair manual. In it a statement is made that the " Shift Mechanism"
can cause the transmission to slip out of gear. But like most self help books, give no insight as to
what to look for, or how it can allow the transmission to slip. I do have the Honda parts display, but
was hoping for some guidance on what to look for. I'm not too confident changing one set of decades
old parts with another set of decades old parts will solve the problem.

Thanks

Tim

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