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Discussion Starter #1
Hey all, I picked up a CB 360 yesterday and I want to start making some changes to better suit my taste and likes. I’ve been looking at some flat saddle options, but most of them don’t look like the battery will clear under the seat. Does it look like I might need to relocate the battery or just keep searching for the right style seat that's flat ?
 

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Thanks, that makes sense . I was thinking to lower the plate that everything sits on about an inch at the bottom of this section of frame. But flipping it makes way more sense . Is the metal piece over the battery a stock piece for the stock seat? Or did someone add it ?
 

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Cool, I ordered a seat I’ll see how close it is when it arrives . The one it came with is just really uncomfortable and not mounted very well. The brown stuff , it’s a little leather tool pouch and a small steal box for tools .
 

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It's the rectifier, usually under a side cover. Wherever you locate it you do want to allow a way for heat to escape.

You should figure out how to put fenders on it otherwise you'll be eating grit and flinging shit at your carbs. Get caught in the rain and the rear tire will be pumping gallons of water per minute at the carb intakes and anything else inline with the deluge.

That taillight is a really poor idea. If we are on a four lane road, your in the centre lane and I'm in the curb, I cannot see your brake light. If I decide to change lanes just as you go to the brakes, the odds are vastly improved that I am going to rear end you. I don't know any bikers that have been rear ended that didn't have a good dose of back or neck pain, a couple guys I know still have problems associated with being hit decades after it happened.

The signal lights look pretty much useless. It appears from the photo that the shocks would interfere with a clear view for anyone behind you. Personally I want anyone around me to clearly be able to see me and what my intentions are when I'm on a bike. I don't want subtle, stylish or cool, I want in your face bright and clear, "I'm here don't fuckin hit me" lighting. I hate riding at night but if I have too the bike I use has 2 led bar lights as well as the headlight. One points at each ditch line so I can see any deer that might dart out in front of me. Hitting a deer is a real night time danger in our area so we adapt our lighting to try and increase safety margins.

Lighting is not a fashion statement.
 

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Yep, rectifier, regulator may or may not be incorporated within it. This is the gizmo that converts alternating current (A.C.) output from your alternator which is generally right on the end of your crankshaft, the stator (stationary part of the alternator) as part of the alternator is located inside the motor, trace those 3 white wires back and you will arrive at the alternator. The 3 white wires each provide A.C. voltage, the red and black is your positive and negative D.C. voltage output. The rectifier/regulator operates on diodes (component that only allows current to travel through it in only one direction) diodes are prone to failure if over-heating occurs, hence that great big heat sink to dissipate the heat precipitated during the A.C. to D.C. conversion and regulation process. Imperative you mount that heat sink somewhere it can gets lots of ventilation/cooling or you will promote premature failure. It is also generally rubber mounted to help isolate it from vibration IF it is mounted directly on the motor.


Rectifier is often mounted directly under the seat and gets hot, which is how it earned the nick name 'rectum fryer'


 

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Discussion Starter #9
Thanks for all the tips guys, once I get it running (mostly carb related) I’ll address the turn signals before any real riding. I agree the shocks are blocking them , even without the shocks they are so micro .

As far as the seat I’ve mounted the “stator” under the seat where the previous owner originally had it . Started making a small mount for the battery and order a frame loop. Everything should clean nice after welding a seat bracket in place on top of the frame tubes.

This cheapie seat isn’t too bad , it’s comfortable enough and looks ok, the size is alright . I just wished it arched forward at an angle to tuck in towards the tank more , the gap might bother me quite a bit if I decide to run this saddle for a while .

Not sure what brand filters these are , I have another set that came with the bike, they look like K&N but I don’t see any stamping which they normally do.

A couple update photos...
 

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we adapt our lighting to try and increase safety margins.

Lighting is not a fashion statement.
Yep, playing 'fast and loose' one Sunday ride I almost ran into a V-Max with blacked out tail light as I couldn't tell when brake light came on. Definitely not a cool mod


Thanks, that makes sense . I was thinking to lower the plate that everything sits on about an inch at the bottom of this section of frame. But flipping it makes way more sense . Is the metal piece over the battery a stock piece for the stock seat? Or did someone add it ?
Real bad idea. The plate is an add on, the raised section is stock. Battery is normally behind carbs. I think you need to check if tyre has been rubbing on underside of plate (pretty common with the mod, kinda 'interesting' when tyre hits it) Rear shocks may be for a 750? Springs way too hard for suspension to move properly. Remove both shocks and put a bar 12" long with holes 10" apart on shock mounts. You need about 1/2" clearance. You also need to put something back between frame rails, they can move independently without any bracing. I thought I was done with this years ago :rolleyes:
 

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You should have left that brace, it was structural. I may be wrong but I think replacing it with a loop of thin wall pipe at the rear end is more like adding a torsion bar then a brace.
 

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... once I get it running (mostly carb related) ...
No surprise there with vacuum operated carbs combined with pod filters and little to no back pressure on the exhaust.
You are going to end up pounding huge volumes of fuel through it just to try and compensate for those mods, that's what everybody else who attempts it seems to do.
 

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Discussion Starter #13
What’s a good fix? I asked the previous owner what was happening , he said the carb on the left (when sitting) would always foul the spark plug pretty fast . Different jets or filters, or swap out the carbs for another style? He also said the floats were probably off. Not sure what route to go for the carbs.
 

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What’s a good fix? I asked the previous owner what was happening , he said the carb on the left (when sitting) would always foul the spark plug pretty fast . Different jets or filters, or swap out the carbs for another style? He also said the floats were probably off. Not sure what route to go for the carbs.
If it is in your budget, I'd get better carbs. There are a lot of good after market carbs out there that will be less maintenance and headache
 

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What’s a good fix? I asked the previous owner what was happening , he said the carb on the left (when sitting) would always foul the spark plug pretty fast . Different jets or filters, or swap out the carbs for another style? He also said the floats were probably off. Not sure what route to go for the carbs.

The route you go for the carbs is you get a manual and you learn to rebuild carbs. If possible you put the stock airbox on it .
 

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What’s a good fix? I asked the previous owner what was happening , he said the carb on the left (when sitting) would always foul the spark plug pretty fast . Different jets or filters, or swap out the carbs for another style? He also said the floats were probably off. Not sure what route to go for the carbs.
Previous owner didn't have a clue what the problem is or he would have fixed it ;)

Disclaimer: I have zero personal first hand experience modifying that bike, the following is based only on what I have read and I accept no credit or responsibility for these ideas, or your results should you choose to pursue them.

1) replace the carbs with non-vacuum controlled carburetors and apparently pods directly connected to your carburetor might be made to work reasonably well.
note: none of these modifications were documented by performance testing to validate their modifications provided a performance improvement over stock.
or
2) introduce a tube or velocity stack between the carburetor and the air filter, which is relatively similar to what the original air filter uses.
repeat: none of these modifications were documented by performance testing to validate their modifications provided a performance improvement over stock.

The same writers also reported the need for some form of an exhaust system in conjunction with the original CV carbs so as not to kill the motors performance in at least one part of the power band.
but repeat: none of these modifications were documented by performance testing to validate their modifications actually provided a performance improvement over stock.
 

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Discussion Starter #18
Awesome information! Thanks for all the tips so far. I come from a Chevy and Volkswagen background so I am just familiarizing myself with different brands and options for carburetors on bikes. With all my searches and reading that I’ve done the last few days it seems like the Mikuni carb kids keep coming up, certainly not cheap but they sound like they are pretty good carbs. Without getting crazy deep into performance and primarily looking for reliability and obviously without breaking the budget are those good options or is there something a little more economical someone can recommend?
 

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Velocity stacks go between your carbs and the breather to smooth airflow. I can't see your exhaust but it's likely part of the problem. Figure out what made it run like shit, it wasn't because of the carbs. Did you go to Honda Twins forum and get a service manual? Did you look through any of the thousands of threads there specifically on cb350 fuel systems?
 

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Discussion Starter #20
Not yet I just got this . It’s all new to me and this is a starting point . I’ve only only old school cars and vespas. I’ll snag a manual for sure , my primary concern is the carbs or like you mentioned the filters or tuning .
 
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