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Discussion Starter #1
Well, to begin with, hello to all. Im new here with a new $100 project, a 1975 Cb360T.

I bought it with a locked up engine. I tried the "pull the plugs and spray PB Blaster in" trick, but it only worked on on side, cause the other plug broke off. Did i mention this thing has some rust? lol

As of now, im trying to get the head off, but i cant get to the second cam sprocket bolt, due to the fact that it wont turn. I can get an open end wrench on it, but the sprocket wont let me get a good enough bite on the bolt, and if i tried it enough it would round it for sure.

Any ideas? My clymer manual isnt here yet, and im dying to get into this thing.

I have some other questions, but this is a good start.



Edited by - Matt N on Jan 19 2008 11:32:00 AM
 

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Discussion Starter #4
sounds like a plan. i was hoping not to have to, but o well. i was surprised to see the guides and tensioner being as nice as they were. the bike only has 69xx miles on it, but was last registered in '83, which explains its condition.
 

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Discussion Starter #5
Any tips on a rebuild for this beast? Im not trying to build a racing bike, just more of an enjoyable cafe thats gets around. Im also trying to keep costs to a minimum, not in the sense of throwing anything on or together, just not the most supreme pieces if you follow me.



Edited by - Matt N on Jan 18 2008 4:56:19 PM
 

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Discussion Starter #6
well i got the head off of it. There mustve been 1/2" of rusty dusty crap on top of the one piston. The other was at TDC so it wasnt bad. But the other has suffered pretty badly from rust, mostly on the cylinder wall that was exposed.

Whats the next best step to take? I know if i go to fix what ive got, ill have to get rings, good used cylinders, most likely pistons, cam chain, etc.

Or should i look at finding a good running engine? Theres a 360T engine on ebay for $300 shipped, but ive yet to ask the condition an whatnot, but its got to be better than what i have, being it isnt frozen.

Will a CB350 twin engine work on the bike? Has anyone ever swapped? Sounds like the 350 has less problems and more parts available. What all would be entailed in that?

Id like to keep as much of my investment as possible though, using as much of the parts as possible.


Ideas?
 

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Sounds like the easist route is to get another engine.

Or you could find a decent cylinder and a new cam chain. You might be able to reuse the pistons & rings if you can get them unstuck without too much force. You're just looking for a runner, right?

2x4 on top of the piston, smack it with a hammer after letting the piston soak a little more. If you can find a stock bore cylinder, you might be able to just bolt it all back up and run it. And make sure to take the oil spinner filter apart and clean it out before running it. And after.
 

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Discussion Starter #8
Thanks for the advice.

Ive got the bad piston/cylinder soaking with Pb blaster. Hopefully ill be able to free it tomorrow and remove the cylinders.

Im after a runner, but id like to have it together for a while before i have to go back for anything major.

But now ive got myself thinking more and more about swapping in a 350 twin. I havent found a definite answer as to if it will mount to my 360 frame or not, but they look VERY similar in the pics ive seen.
 

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i've been having a similar discussion on another forum, the 350 won't fit without several modifications to the frame. though apparently a 360 engine will fit in a sl350 frame easier than a stock one.

...connoisseur of slack...
 

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My opinion is to take the $100 you've got into this thing and chalk it up to a learning experience. Take anything that's not covered with rust and sell it on ebay. Then invest the money you would have spent on engine work and parts for this bike and buy something that's already running.
 

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craig wins the boobie prize. but id keep the rusty one, and buy another and use the first for parts. pull the cyls, and bore it. get nos pistons and rings. the carbs are probably a wreck too.

jc

i dont know shit
 

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Discussion Starter #12
Snorklefork: What forum is that being discussed on? I think if anything thats the route i want to take. Does that thread have any comparison pics or anything?

I hear you guys on the "get another one" idea. But really i like the 360 enough to put the money down on a 350 twin and fit it. i think it might even cost the same or less. And ive got enough shit laying around as it is, i dont need another bike with its parts. haha

Anything you guys can contribute to the conversion/swap would be great!
 

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Discussion Starter #13
Well ive decided to go ahead and rebuild the 360 I have, unless another falls into my lap (OUCH!) for a good price. I figured most of my parts are going to cost me about $300, for the engine at least. Thats even counting in a used head and pistons which i may or may not need.

So here come the rebuild questions.

When doing a rebuild, should the pistons be replaced? The cylinders i have lined up are stock bore, which i assume the ones on this bike are also. For a new set of pistons (STD-NOS) with rings and everything its like $100.

Also, is there any benefit to boring the cylinders other than when necessary? Reason i ask is there are some oversized pistons available for chepaer than the STD's, but the cylinders im buying dont NEED bored.


Generally, with as much or little detail as you like, what is the procedure for replacing the pistons and getting them situated in the cylinders? Can I leave the rods on the crank still in the case, put the pistons on the rods, and the sit the cylinders down over the pistons?

Can you tell my Clymer manual still isnt here yet? lol
 

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Jump on it for $50 bucks.

Gas Right, Clutch Left
 
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