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Author Topic: 72 CB350 For the Daughter  (Read 19326 times)

Offline crazypj

  • Posts: 12487
  • Split personality, I fake being smart
Re: 72 CB350 For the Daughter
« Reply #190 on: May 10, 2017, 12:28:27 »
I would say you have either a chain problem or crank isn't running true?
There shouldn't be any variation from one TDC to the other so probably stiff link in chain or bits of tensioner rubber stuck on sprocket?
First pic is where a brand new chain will sit, after a couple of heat cycles it will retard slightly to correct position.
'you can take my word for it or argue until you find out I'm right'
I gave my girlfriend an orgasm the other night, but, she spat it back at me
 Some humans would do anything to see if it was possible to do it. If you put a large switch in some cave somewhere, with a sign on it saying 'End-of-the-World Switch. PLEASE DO NOT TOUCH', the paint wouldn't even have time to dry
 Itís not worth doing something unless someone, somewhere, would much rather you werenít doing it  (Terry Pratchett)
CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline Harsh

  • Posts: 170
Re: 72 CB350 For the Daughter
« Reply #191 on: May 10, 2017, 21:03:34 »
Decided to just go for it and pull the engine.  Not wanting to scratch the frame I rigged up my chain fall and was able to lift the engine and manipulate it around the frame.  Worked like a champ



Took one of the upper mounts and spun it around so it pointed away from the frame.


I think I may have goobered up the initial assembly.  The parallel line on the cam sprocket is pretty damn close when the crank is at the LF mark and not so much when on the LT mark like it is supposed to be.  Unfortunately, I can't put everything back together because the left rocker box gasket tore when I took it off.  At least I now know what was wrong and can fix it.

Thank you to everybody who provided input and assistance trying to figure this out.


At LT mark.



At LF mark.
« Last Edit: May 11, 2017, 09:51:04 by Harsh »
2014 Triumph Tiger
2007 Triumph Daytona 675 - Track Bike
1974 Honda CB750 Cafe
1972 (x2) Honda CB350

Offline crazypj

  • Posts: 12487
  • Split personality, I fake being smart
Re: 72 CB350 For the Daughter
« Reply #192 on: May 10, 2017, 21:29:03 »
Something I just thought of, the cam sprocket does have double the amount of teeth to the crank sprocket?
360 is 17/34 but I think 350 is different (it's several years since I did a complete 350build)
'you can take my word for it or argue until you find out I'm right'
I gave my girlfriend an orgasm the other night, but, she spat it back at me
 Some humans would do anything to see if it was possible to do it. If you put a large switch in some cave somewhere, with a sign on it saying 'End-of-the-World Switch. PLEASE DO NOT TOUCH', the paint wouldn't even have time to dry
 Itís not worth doing something unless someone, somewhere, would much rather you werenít doing it  (Terry Pratchett)
CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline Harsh

  • Posts: 170
Re: 72 CB350 For the Daughter
« Reply #193 on: May 11, 2017, 09:50:37 »
The cam sprocket has 26 teeth, but I don't remember how many teeth the crank has.  With the generator on the LT mark I was able to spin the cam gear so that it is parallel to the top of the engine like it is supposed to be.  I assembled it one tooth off.
2014 Triumph Tiger
2007 Triumph Daytona 675 - Track Bike
1974 Honda CB750 Cafe
1972 (x2) Honda CB350

Offline Harsh

  • Posts: 170
Re: 72 CB350 For the Daughter
« Reply #194 on: May 11, 2017, 20:15:42 »
My luck was strong today.  There is a tech at the dealership that had a 350 that he was going to restore, but he sold it for some quick cash.  He had mentioned that he already had a gasket kit for it, but I didn't know if he used it or sold it with the bike.  I called and he still had it and was willing to sell it for $15.  I picked it up after work.

Decided to pull the head to make sure the valves didn't contact the pistons.  All good there.  It took forever,  but I was able to get the camshaft installed and aligned correctly.   I used the Clymer manual for directions because it is one of the rare cases where it is easier to understand.   However, using their method takes two people.  I had my daughter turn the crank while I lifted the cam to keep pressure on the chain.  I will set the valve lash tomorrow and hopefully get the engine back in the bike.
« Last Edit: May 12, 2017, 08:35:46 by Harsh »
2014 Triumph Tiger
2007 Triumph Daytona 675 - Track Bike
1974 Honda CB750 Cafe
1972 (x2) Honda CB350

Offline Maritime

  • DTT SUPPORTER
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  • Posts: 8742
Re: 72 CB350 For the Daughter
« Reply #195 on: May 12, 2017, 08:34:09 »
good news, almost there now.
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
"Beer makes you feel the way you ought to feel without beer" -Henry Lawson
"Beer is proof that God loves us and wants us to be happy." - Thomas Jefferson

Offline Harsh

  • Posts: 170
Re: 72 CB350 For the Daughter
« Reply #196 on: May 12, 2017, 08:40:44 »
Yep.  I feel I am close enough that I am going to call the insurance co. today and get insurance put on the bike so I can get some license plates.  There is a strong chance (depending on weather) that I might be able to go for a quick jaunt down the street this weekend.
2014 Triumph Tiger
2007 Triumph Daytona 675 - Track Bike
1974 Honda CB750 Cafe
1972 (x2) Honda CB350

Offline Maritime

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  • Posts: 8742
Re: 72 CB350 For the Daughter
« Reply #197 on: May 12, 2017, 08:58:54 »
Take some pics of it all together and post them before the first test ride!  Good luck, should be fun.
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
"Beer makes you feel the way you ought to feel without beer" -Henry Lawson
"Beer is proof that God loves us and wants us to be happy." - Thomas Jefferson

Offline Harsh

  • Posts: 170
Re: 72 CB350 For the Daughter
« Reply #198 on: May 16, 2017, 08:35:16 »
Managed to get it timed yesterday.  What a pain in the rear that was.  Because I had previously messed with the individual boards it took a a while to get them adjusted correctly along with the placement of the main adjustment plate.  The right cylinder is ever so slightly advanced, but I couldn't get it to adjust anymore.  When revved up it is right at the marks showing full advancement.  The bike doesn't get ridden at idle so I don't see an issue with it.

Since that was done I was able to turn my attention to fabbing up the brake reservoir mount, exhaust supports, and I have what I believe is a great and simple plan to keep the kickstand from hitting the exhaust.  All I have to do is make the required bends and bolt it on.  Going to talk to the painter today about fixing the front fender and see if he will weld the mounting tabs on the exhaust.  I haven't heard back from the guy that did the powder coating for me.  I still need to get the rear brake rod from him.  So a text will be going out today to him.  I plan on going to the DMV today to get the plates.  They usually don't have the antique plates there so it will probably be a week before I get them.  I guess it is time to start an actual checklist of what need to be done to complete the bike.
2014 Triumph Tiger
2007 Triumph Daytona 675 - Track Bike
1974 Honda CB750 Cafe
1972 (x2) Honda CB350

Offline jag767

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  • Posts: 1185
    • Kinesis Moto
Re: 72 CB350 For the Daughter
« Reply #199 on: May 16, 2017, 08:54:40 »
Managed to get it timed yesterday.  What a pain in the rear that was.  Because I had previously messed with the individual boards it took a a while to get them adjusted correctly along with the placement of the main adjustment plate.  The right cylinder is ever so slightly advanced, but I couldn't get it to adjust anymore.  When revved up it is right at the marks showing full advancement.  The bike doesn't get ridden at idle so I don't see an issue with it.

Since that was done I was able to turn my attention to fabbing up the brake reservoir mount, exhaust supports, and I have what I believe is a great and simple plan to keep the kickstand from hitting the exhaust.  All I have to do is make the required bends and bolt it on.  Going to talk to the painter today about fixing the front fender and see if he will weld the mounting tabs on the exhaust.  I haven't heard back from the guy that did the powder coating for me.  I still need to get the rear brake rod from him.  So a text will be going out today to him.  I plan on going to the DMV today to get the plates.  They usually don't have the antique plates there so it will probably be a week before I get them.  I guess it is time to start an actual checklist of what need to be done to complete the bike.

Sweet!