Author Topic: Dorothy III - CB750 (Read 106237 times)

70CB750 · « **Reply #300 on:** September 25, 2015, 04:56:33 AM »

Thank you, Larry

70CB750 · « **Reply #301 on:** September 30, 2015, 03:34:25 AM »

So it starts, yesterday we had several hours long rainstorm and I used it to work on the engine.

The rottisserie works somewhat, but because of the angle of the original side, it should have actually a U-joint to turn over better.

But it will do for now.

70CB750 · « **Reply #302 on:** September 30, 2015, 03:52:44 AM »

Valve train and camshaft off.

70CB750 · « **Reply #303 on:** September 30, 2015, 03:53:40 AM »

Single notch rocker shaft, she is old

70CB750 · « **Reply #304 on:** September 30, 2015, 03:56:28 AM »

Yes, I got that covered and stay off the booze - makes me drop much less parts

70CB750 · « **Reply #305 on:** September 30, 2015, 04:12:43 AM »

Ha! I discovered Myers's Spicy Rum not so long ago

will not hurt to sober up little bit.

70CB750 · « **Reply #306 on:** September 30, 2015, 04:14:14 AM »

Honest, that's the way I found it

Crappy picture, but the lift plate had missing corner. There was nothing wrong with the clutch function either.

Some aluminum grit in the oil pan, that's all I found.

70CB750 · « **Reply #307 on:** September 30, 2015, 04:19:27 AM »

70CB750 · « **Reply #308 on:** September 30, 2015, 05:01:52 AM »

Head looks good, or does it? Planning to do a leak test just like this to have a benchmark.

70CB750 · « **Reply #309 on:** September 30, 2015, 05:28:10 AM »

The clutch basket looks different.

RAFster122s · « **Reply #310 on:** September 30, 2015, 07:47:39 PM »

Nice progress. Some scary P.O. surprises I see you have uncovered.
It is disappointing to find poor maintenance and hack jobs.
David

RAFster122s · « **Reply #311 on:** September 30, 2015, 07:52:40 PM »

Did you manage to install the new support so it was directly opposite the center of the shaft for the rotation.
Nice work.

70CB750 · « **Reply #312 on:** October 01, 2015, 03:18:06 AM »

Yes, I did, but the top of the original stand is angled up, I may figure some ball joint from the pile of scrap I have to make it work better.

Anyway, I suspect the clutch lifter was installed cracked and gave in after a while. There is some damage to the cover, but nothing excessive, it will hold. You can see the little notches in reinforcement ribs.

70CB750 · « **Reply #313 on:** October 01, 2015, 03:22:08 AM »

How do you get out the spring pin that holds the kickstart shaft? Number 9.

70CB750 · « **Reply #314 on:** October 01, 2015, 03:42:01 AM »

I wish I knew the history, like how many miles on the engine. Some of the dogs are worn a bit.

MCRider · « **Reply #315 on:** October 01, 2015, 06:41:52 AM »

Quote from: 70CB750 on October 01, 2015, 03:22:08 AM

How do you get out the spring pin that holds the kickstart shaft? Number 9.

ITs a bear. Many threads on this, when I did mine a few years ago. Settled on a small vicegrip; squeeeze what bit of the pin you can reach and tap up on the vice grips. Once it moves, reposition the VG to grab a little more and repeat.

70CB750 · « **Reply #316 on:** October 01, 2015, 06:44:50 AM »

Thanks! I will take my time, left it aside yesterday.

MCRider · « **Reply #317 on:** October 01, 2015, 06:57:02 AM »

Quote from: 70CB750 on October 01, 2015, 06:44:50 AM

Thanks! I will take my time, left it aside yesterday.

Oh yeah, I remember now. Once setting the vice grip, I used a long screwdriver (maybe it was a tire iron) to pry on it. There was some point that made an obvious fulcrum. Once it moves, reposition the grips and repeat.

MoMo · « **Reply #318 on:** October 01, 2015, 07:34:30 AM »

Certainly are worn. Won't a pin punch drive that out? Remember I have a later model trans complete...Larry

70CB750 · « **Reply #319 on:** October 01, 2015, 07:36:49 AM »

Quote from: MoMo on October 01, 2015, 07:34:30 AM

Certainly are worn. Won't a pin punch drive that out? Remember I have a later model trans complete...Larry

Right! You do. I suppose they are compatible 1970 - 1975, right? I will buy it from you.

MCRider · « **Reply #320 on:** October 01, 2015, 07:39:07 AM »

Quote from: MoMo on October 01, 2015, 07:34:30 AM

Certainly are worn. Won't a pin punch drive that out? Remember I have a later model trans complete...Larry

That pin can only go one direction. If you tap on it it stops against the floor of the hole its in. It must be withdrawn.

I think I'm remembering correctly.

MoMo · « **Reply #321 on:** October 01, 2015, 07:45:46 AM »

Quote from: 70CB750 on October 01, 2015, 07:36:49 AM

Quote from: MoMo on October 01, 2015, 07:34:30 AM
Certainly are worn. Won't a pin punch drive that out? Remember I have a later model trans complete...Larry

Right! You do. I suppose they are compatible 1970 - 1975, right? I will buy it from you.

K7/8 trans, maybe someone knows compatibility issues, I don't...Larry

70CB750 · « **Reply #322 on:** October 01, 2015, 07:48:44 AM »

Quote from: MoMo on October 01, 2015, 07:45:46 AM

Quote from: 70CB750 on October 01, 2015, 07:36:49 AM
Quote from: MoMo on October 01, 2015, 07:34:30 AM
Certainly are worn. Won't a pin punch drive that out? Remember I have a later model trans complete...Larry

Right! You do. I suppose they are compatible 1970 - 1975, right? I will buy it from you.

I will check into it. Maybe invidual gears can be replaced only.

K7/8 trans, maybe someone knows compatibility issues, I don't...Larry

Stev-o · « **Reply #323 on:** October 01, 2015, 03:21:31 PM »

Quote from: MoMo on October 01, 2015, 07:45:46 AM

Quote from: 70CB750 on October 01, 2015, 07:36:49 AM
Quote from: MoMo on October 01, 2015, 07:34:30 AM
Certainly are worn. Won't a pin punch drive that out? Remember I have a later model trans complete...Larry

Right! You do. I suppose they are compatible 1970 - 1975, right? I will buy it from you.

K7/8 trans, maybe someone knows compatibility issues, I don't...Larry

The sprocket shaft is different, The K7-8 is longer if I remember correctly. It could be used but the chain will not align correctly with the rear sprocket.

MoMo · « **Reply #324 on:** October 01, 2015, 05:00:27 PM »

Quote from: Stev-o on October 01, 2015, 03:21:31 PM

Quote from: MoMo on October 01, 2015, 07:45:46 AM
Quote from: 70CB750 on October 01, 2015, 07:36:49 AM
Quote from: MoMo on October 01, 2015, 07:34:30 AM
Certainly are worn. Won't a pin punch drive that out? Remember I have a later model trans complete...Larry

Right! You do. I suppose they are compatible 1970 - 1975, right? I will buy it from you.

K7/8 trans, maybe someone knows compatibility issues, I don't...Larry

The sprocket shaft is different, The K7-8 is longer if I remember correctly. It could be used but the chain will not align correctly with the rear sprocket.

If the gears are the same , it'd be a cheap fix for Prokop as I'd sell real cheap

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Author Topic: Dorothy III - CB750 (Read 106237 times)