Topic: CB900C

[70CB750]

Delkevic exhaust installed. 

Turns out #4 spark plug was bad;  that and idle adjustment and she is purring like a happy kitten.    I took out the bulb that keeps reminding me air pressure in rear shocks is low - because she has progressive shocks instead of air shocks.
 
She is so different from 750K, I have to really  fold my 6'2" to sit down.

I will put on her the touring windshield from Dorothy, and replace the tank lock.  Somebody unlocked it with screwdriver.

[70CB750]

I put on her about hundred miles on local roads. I can imagine her as a commuter bike, ride all day would be painful. 

She starts quite well, yes it is Summer but still. I spoil her with ethanol free gas, she is too old for that nasty #$%*.

Plenty of power and Delkevic makes it known 

I had to fabricate rear tank catch, there was only a piece of rubber.

First gear sometimes does not hold when idling, gotta shift and keep her bit under power.

Anybody have different seat than this one position only? I would love to see some pictures for inspiration.

I still want to synchronize carburetors, but I do not expect much from it.

[pushin9s]

Brings back fond memories.  I woke up Christmas morning 1983 to find a new CB900C (my dream bike at the time) sitting in my living room.  My wife bought it and had my best friend ride it over Christmas eve and they brought it in through the sliding glass door.  Only problem, it was a sunken living room and the wife wouldn't let me start it and ride it out. 

I eventually put a Hondaline fairing, panniers and top case on it and kept that bike for 23 years.  I never did replace the seat and it was not very comfortable for my 5'11'' frame.  I had the fairing lowers on it and my knees and shins were pushed up to the point where they touched most of the time.  But the bike was fun, and very reliable.  Only real problem I had with it was the rear brake caliper would stick and drag.  One time I thought I'd lost a couple of cylinders because the power just dropped.  Turned out the rear brake was dragging so much it had turned the rear rotor cherry red.  WOW. 

[70CB750]

I am 6'2" and 260 pounds and I can fold on it alright but after 30 miles I feel stuck.  Commuter bike 

Otherwise I love the power, she starts easily with the choke, runs like a champ.   For the size and weight, she is easy enough to lean in corners. 

I got used to feeling the shaft kick in when shifting, it may be just this bike, little warn out.

Also in Low you have to keep your foot on first, otherwise it pops up, it will not do it in High.

The rear brake pedal pivots steel on aluminum - it took some effort to take it apart and clean it.  Aluminum and steel connection is prone to oxidation.  I used vacuum grease on it.


It must been some effort to get it out of the living room, 500 kilos or so 

[70CB750]

Carburetor number two had stuck float or something like that.  Had to pull the rack and clean, nothing new.

But when I put the rack back, I swapped push and pull cables 

Nothing like little practice on removing carburetors.

[Alan F.]

I remember hearing good things about these from some truck drivers I used to talk with at work about 20 years ago. I figured one might be in my future someday. There are several around, maybe its time?

[70CB750]

I remember hearing good things about these from some truck drivers I used to talk with at work about 20 years ago. I figured one might be in my future someday. There are several around, maybe its time?

You are right, they seem to be easy to find and cheap.  I like it - up to half an hour ride    The seat makes you stay in the same position, I will eventually replace it with just a plain bench seat.  With the original seat I eventually end up sitting on the passenger hump.

[70CB750]

While back in the fall I had to trailer her home, finally found out it was that dumb vacuum fuel switch.    Replaced that and also the leaking petcock with aftermarket unit.  Yesterday I finally got carburetors back in and she started right up.

[70CB750]

She got the first inspection sticker since 1992.

[Stev-o]

Congrats, but I would not want those affixed to my bikes! Do you have an option?

[Alan F.]

I agree, here in MA the inspector puts the sticker on your license plate. Security head bolts are a good idea, I had my plate stolen once years ago. It had those reflector screws with wingnuts...never again.

Congratulations on getting it up and running again.

[70CB750]

Funny, the guy asked me where I want the sticker, I always had it on the fork, thats the Virginia way.

Edit:  Seems like people add a little plate to the front wheel for it.

[70CB750]

I finally decided to deal with the charging issue, narrowed it down to the rotor.  The shop manual asked for Rotor Puller 07933-4250000, turns out - no pun intended -  the rotor has M18x1.5 inner thread and one of the unused struts for the sidecar did the trick.  God loves the infantry - sometimes  

The rotor resistance is 1.8Ω, time to replace it and brushes, too. 

[70CB750]

I replaced rotor and brushes with Rick's and she is charging again.  I don't have to treat her like Tesla anymore - charging every day. 

[Don R]

 The one I bought had been left out in the rain and water got in the gas tank. Not sure why, I assume the drain was plugged and the cap seal leaked.

[70CB750]

The one I bought had been left out in the rain and water got in the gas tank. Not sure why, I assume the drain was plugged and the cap seal leaked.

Interesting, I think the tank has a rim around the throat.

[Alan F.]

Could be condensation?

[70CB750]

160 miles today, she is definitely gaining on me.  I love the no nonsense power and how she revs up, she handles mountain curves beautifully, easily maintaining travelling speed at about 70+ mph, good mileage and reliable and all, but the seat is killing me.  Most of the trip I was sitting on the edge of the passenger seat, knees go numb from the same position that's impossible to change.

[Alan F.]

I had a CM400C with that stepped seat, I feel your pain.

[Stev-o]

Looks like a nice loop to ride, Prokop! 

BTW - what riding app is that?  You like it? I have a couple including Scenic, the one I dont like

[70CB750]

Looks like a nice loop to ride, Prokop! 

BTW - what riding app is that?  You like it? I have a couple including Scenic, the one I dont like

Old fashioned app, Stev-o     I put my destination and places along the road into google maps, take a screenshot a trim it in PhotoShop 

[Stev-o]

Looks like a nice loop to ride, Prokop! 

BTW - what riding app is that?  You like it? I have a couple including Scenic, the one I dont like

Old fashioned app, Stev-o

Ha...if it works for you, go with it!

[70CB750]

What do you think?  I found the same bike on ebay.

[Alan F.]

Have you seen this? Looks great but I wonder how comfortable they are.



https://texavina.com/28-inches-1979-1983-honda-cb900c-cb900-custom-low-profile-dual-passenger-cafe-racer-seat-sku-z4126/

[70CB750]

Have you seen this? Looks great but I wonder how comfortable they are.



https://texavina.com/28-inches-1979-1983-honda-cb900c-cb900-custom-low-profile-dual-passenger-cafe-racer-seat-sku-z4126/

I am seriously thinking about it.  I mean the seat is fine for local runs but the long trip was great - except my sorry ass, of course.