CB175 carb and exhaust questions

[carnivorous chicken]

Just picked up a 1972 CB175. Got it for $200 (no title), with the idea of selling the stock and in great shape exhaust to a buddy with a nice CB175. Then I found a great set of CL175 exhaust at a junkyard. I hooked up an ignition switch and tested for spark. It'll fire. Tested compression, both cylinders at 120. It's only got 4000 original miles. The carbs are missing the top parts (cap and slides), but look to be in decent shape otherwise. I've got a compete set of CB200 carbs spotted at the junkyard, anyone know if they will just bolt on? Jetting issues? I've got the stock air boxes and filters, and am planning on running them just to get it started. Then I'll tinker with pods. I am also going to run the CL175 exhaust stock for now, but will open that up after it's running. Any major differences between CL and CB exhaust in terms of jetting the carbs? Thanks in advance, will post a photo when I get a chance. Will also be selling parts off of it that I don't need if anyone is looking for stock parts. Not a lot that's beautiful, although rear fender is very nice, ding and rust free. Seat cover isworn, but stock and all there, and pan is in good shape. Original bars. CB exhaust mounts can go too.

 

[DSHEP]

Nice find!

CB exhaust flows better I believe. That said I replaced my stock CB pipes with CL pipes + EMGO mufflers and didn't need to touch the jetting. You won't know until you try it in your particular situation.

I can't help you with the CB200 carb fitment.. Haven't tried that.

 

[carnivorous chicken]

Thanks! I guess I'll dive in. The folks at the junkyard here are cool and know me from the past 15 years or so, so they'll let me grab the carbs and bring 'em back if they don't work.

 

[DUEX EX]

i belive the cb 200 carbs are a bit smaller than the 175s,the 200 was tuned down. ive owned both bikes and the 175 had alot more pep

 

[teazer]

There are minor differences between 175 and 200 carbs, but nothing significant. They are the same size bore and the same size slides. Slow jets and emulsion tubes have different size air bleed holes but I suspect that you may not notice the difference in the real world.

 

[Bert Jan]

Cam on the 175 is different as 200, as are the carbs. 200 has 20mm, 175 has 22mm.
I would try to get the 22's working.

Any chance you'd find a 175 cam there and willing to ship to Holland?

 

[carnivorous chicken]

Thanks all for the comments. First thing I noticed was that the mounts are different -- CB200 has sync screws, which would be great, but the mounts are at a slightly different angle. I think I could just use the CB175 mounts. That being said, The CB175 carbs that came with the bike are complete except for the caps and slides, so it sounds like I can just use the cap and slides from the CB200 carbs in the CB175 carbs. Make sense? Jets are so gummed up I can't read them to see if they're the same -- but I'll just get rebuild kits for the 175.

@Bert Jan: My local yard usually won't allow folks to pull apart complete or nearly complete engines. I know where there's a CL175 in the yard -- same cam? I can poke around a little for a CB175 if it's not the same. And I can ask if they'll let me tear into it. They also have piles of old engines. I can poke around there. I knew where a CB160 engine was, and was able to draw a map for someone so they could find it, but I don't know of any CB175 engines offhand.

I'm always a little conflicted about telling folks about my local yard. They're such great folks, and since I've been going there for 15 years they know me pretty well and give me great deals. But I also don't want people from out of the area finding out about it and stripping all the good stuff. I also know a local guy who used to race Indians and BSAs in the 1950s. He's got 3 dozen or so old Japanese bikes in his yard a few piles of tanks and other parts. He's not in the phone book, and I view him as a great local resource. He's the guy who sold me the 175. A little cranky at times, but he likes it when I buy stuff. Last time I went to look at the 175 I brought a girl friend who needed some CB350 parts. Something about bringing a cute girl seemed to liven up the old crank. Works at the junkyard too -- some of those guys bend over backward and do the work for me if they can talk to the girl at the same time...