Next bike project

[luludog]

Took the transmission gear sets out, along with the kick starter shaft/gear.


Neutral switch had to be removed before the shifter drum cold be taken out


Screwed a bolt into the shift drum to help push it out


Shifter mechanism had to be removed also




Used a bolt to keep all the parts in their respective order


Shifter drum is held in with a metal keeper, held in with two screws


Now it was time to pull the hairpins which kept the dowels in place for each fork.


Notice that there's one dowel pin missing...


Couldn't get the last dowel out. Had to thread a tap in it, and it still didn't want to come. Ended up using a little valve grinding compound in the hole and slowly turned it with a drill motor. About 5 rev's and started to work out.


Now the drum was ready to come out.


Here's a pic of the crankshaft assembly. Its a real piece of engineering. All roller bearings, even on the rods. No wonder its got a 10,500rpm red line

[luludog]

Cleaned a bit today. First a bath in the solvent tank (mainly degreaser, water soluble). Idea was to get the big off. The parts will get another cleaning later.






After a few hours in the cabinet (glass beads). Not to worry, only the external parts were blasted. More cleaning & prep work for painting will follow

[Neil]

Going to be a good looking as well as running 175 when you're done.

[zman]

Nice bike, Had a yellow and white one I rode the heck out of. Back then the speed limit was 55 on the hwy so it got along just fine.

[luludog]

Thanks guys.

Didn't mention before, but my original '71 CB175 was stolen. Never to be seen again... this little bike will have great memories for my brother, father & me. We all rode and enjoyed it.

Working on the cylinder head. Hope to have more updates soon.

[gregforesi]

You do fine work young man. Your attention to detail is phenomenal. I suffer from lack of patience so I know I'll never be able to do this sort of work. That's the main reason I'm a hacker and whacker.
I'll leave these concours restorations to folks like you and Placerville. I gotta say though...I do enjoy the view.

[luludog]

Thanks Greg

Did some more cleaning

Before






After






Pic of valve layout (only parts missing are the washers or shims that go between the head and the springs)
Exhaust valves have two seals each - Intake none




Exhaust valve guide(s), checked out good


Intake were good too


Misc

[luludog]

Not much progress, but thought the regulator needed some attention. Haven't tested it, hopefully it'll do its thing after I install it.

Here's a pic after the label was masked off.


Turned the air pressure down in the cabinet to take the rust & finish off. Painted with Stainless paint and used red touch-up for the screw and setting plug.

[transitman]

nice to see a really thorough build, well done you. and lots of good pics too. love the finish fresh from the blasting, got to do some of that on mine as it progresses

[luludog]

Thanks

Getting ready to bead blast the frame & parts, but first had to remove the seat cover & foam so the seat pan can be cleaned up & powder coated

Had to remove the hinge. I think '71 was the last year for the rear hinge, later years went with a side hinge set up.


Next came the seat strap. Chrome brackets are badly rusted.




Seat pan barbs had to be bent up, so the cover can be removed
There's quite a few, and luckily none broke off


Seat cover




Now it was time to remove the foam. I thought this would be the easiest part. Nope... foam was glued/stuck in place.
It is cool seeing the different types of foam and how it was put together.

[luludog]

More seat stuff





Pried the brackets off... pretty rusty


Bead blasting cleaned them up, but they were still bent


Had a chuck of aluminum, happened to be the right size, just needed a hole


Ready to clamp it in the vise

[Neil]

Like what your doing down to the smallest detail.

[luludog]

Thanks Neil. Probably more detail than most would like to see, maybe it'll help someone or convince others to take on a project.
---------------------------------------
Decided to work on the front wheel. Spokes looked good, but will need to clean them up and see. New ones aren't cheap.


Took the spokes out.


Rim looks really good with just a couple of small rust spots on the inside.


Pic of the front brake hub


Front axle


Front brake assembly




Brakes are actuated through (2) mechanisms that work in unison.


They have dimples that you line up for correct fitment - pretty cool!



Front brakes shoes are in good shape with plenty of material left - cleaned and ready for bagging.


Speedometer drive gear is removed by turning counter-clockwise


Exposing the driven gear which engages with the speedo cable
Not sure how to remove this assembly - looks like I might need to pull the pin to the right?


Misc parts needing to cleaned

[trevor42]

Thanks Neil. Probably more detail than most would like to see...

There's no such thing as too much detail in a restoration thread of this quality!
I have neither the time or space to attempt such a project, so it's nice to be able to work vicariously through you.

[luludog]

Thanks Trevor. Its been slow going. Hopefully post some updates soon.

Note on taking the driven gear out of the front brake panel. Thought the roll pin could be removed and then the gear/seal would come out - Nope, didn't work, and I damaged the seal pulling it out (new seal not listed & NLA ). Will need to see if the tach seal works or I'll be searching for another brake panel Could be worse