there are some brilliant guys on this board, but you may have to provide a bit more info than this...

how do you know it's "over" heating? what are the symptoms? where are you located and what's the weather been? how long has this been happening? have you made modifications that could affect the mixture? are you running lean maybe? do you have the right spark plugs in there? is your coil good? is your oil level right? is your oil filter clogged?

 

Hi Retro
Welcome to the forum and please feel free to post any questions.
Could you add you location to your profile its always helpfull for us.
Now for the questions can you describe how the engine overheats, what symptons are there.
Does the engine start to get tight?
Do the pipes glow ?
Does it smell hot?

 

Assuming you are overheating there are generally a couple common causes:

incorrect valve adjustment (or burt valves)
incorrect ignition timing
too lean fuel mixture

 

Wow this post didn't go very far. Time to revive it I guess.

I have a '75 CB200t that I assume has an over-heating problem as well. The problem started mid spring this year when the weather (in Portland Or.) was chillin in the 70's. Why I think I am over heating; after about 15 min of riding I lose throttle power in 4+ gear and the engine is really hot. Pretty much once I hit 45mph the problem really kicks in. The engine will cut out or just bog down when throttling. I changed my oil, checked the timing, points, gaps, battery power etc... everything seams to be right. I thought maybe I was running lean. I set my throttle needle to the 2nd notch down with my jets at 95. (stock is 88). I also have crappy Emgo filters - taped up to restrict the air flow. As advised by a few friends. After these changes nothing happened so I stepped up my jet to see what would happen. I figured I'd go richer and work backwards. I am now running 98 jets with the same problem. (note: I did, out of curiosity, drop down to 92 jets with the same results.)

Phew. Please excuse any improper use of terms and lack of info, I am still learning my engine and the forum.

 

Hi why do you have tape over the pods? The volume of clean/clear air in the pods is likely to be minimal compared to the stock filters, tapeing them up will restrict their ability even more ( like driving around with the choke on )
post some pics of your bike /set up

 

It may be something else overheating, Carbs, Coils, vapor lock....the fuel tank can get hot....Honda air cooled engines really rarely overheat if not abused. My CB350 once got hot, but I was riding it off road, deep side, slowly, with high RPMS to keep moving. It got very hot (Smell) but continued to run ....

I suspect you have another issue. My CB360 would behave like yours (not overheating) and it turned out to be a carburetor rubber manifold that did not leak air cold, but would leak and lean out the mixture after about 15-20 minutes or riding. The bike would run worse and worse, then wouldn't start at all...cold, one kick start.

I'b be checking those things....

 

@simo they are not taped entirely up. I taped up about half the filter. A few friends including someone at a shop advised I use electrical tape. They are pretty cheap filters, that suck in a lot of air, plus there are leaks around the mount tube. Check out the attached

photo.

 

Thanks for the input. I looked closely at my manifold... yup one is busted. It's a small crack in the rubber. I'm ordering a new one. I'll follow up when it's installed. Thanks guys. Keep sending your thoughts in case I have other problems.

 

Compared to the stock set up that's a tiny amount of clean air volume available and no intake length, I'd ask the shop that advised you to tape that pod if they know about intake lenght tuning.
heres a pic of the stock setup on my cd175 its worth noting that there's a long bit of pipe between the filter and the carb and size of the air filter. The cb175/200's are fussy about these two things . You can run pods BUT you need to add a lenght of pipe between them and the carbs, and unless you're a fan of flat spots get some pods that are much larger/longer , ditch the tape regardless and buy a box of plugs so you can plug chop and set the jets correctly

 

I would check the a/f mixture and engine timing. Usually air cooled engine are very easy to diagnose the overheating problem.