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Author Topic: Montreal Manchild with an '81 Honda CB750K  (Read 32077 times)

Offline The Jimbonaut

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Montreal Manchild with an '81 Honda CB750K
« on: Nov 17, 2016, 12:44:16 »
High fives from Montreal  ;)

Great to be here, I've been riding bikes for 30 years but only recently bought my first - a 2001 Yamaha V Star 110 Custom.  Fixed it up and made it my own, but really wanted something with a bit more soul if you know what I mean.  So bought this little beauty for a song -



- and pushed it 5kms home.  I've sweated for this old girl already.  Non-starter, so switched out the plugs, got a new battery, cleaned up the carbs and air filter and finally got her running yesterday.  I'm new to all this so it's slow going but tons of fun, feel like a kid again with a whole sh!t load of new lego.

I'm planning on a brat build and have a million ideas on my head, most of which are going to need your expert help, guidance and honesty.  Looking forward to the journey and thanks for having me.

I'm calling her Rhonda.
"I'm telling you Donnie, nuthin' but nuthin' but right"

Offline coyote13

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Re: Montreal Manchild with an '81 Honda CB750K
« Reply #1 on: Nov 17, 2016, 12:51:56 »
After going through the full tune-up procedure (grab a manual, they should be available in a PDF online for free download) you can make this as simple or as complicated as you'd like.  Personally, I think a lot of people start off too ambitious and end up losing interest in their projects because they've dug themselves in too deep before they were ready.  Start small.  Sleek, smoked blinkers (if that's legal where you are) and a smaller LED tail light will do wonders for the look of that bike.  Low rise superbike bars, lose the grab rail, and maybe a slimmer aftermarket seat and that bike is in business.

OR you can hack the whole rear end off, weld up a new subframe, monoshock, modern swingarm, USD forks, clip-ons, custom controls, blah blah blah.

Sky's the limit, welcome aboard!
Half the fun's in the get there...

Offline The Jimbonaut

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Re: Montreal Manchild with an '81 Honda CB750K
« Reply #2 on: Nov 17, 2016, 13:04:49 »
Montreal winters mean I'll have months to work on her so I'm planning to do a bit of a number.  Frame chop and seat hoop, and thinking of replacing the rear shocks with taller ones, maybe around 15" to straighten out the foundation line of the bike.  Pretty sure the shocks I have on the bike at the moment are after market.

I have the Clymers and will be going through that to follow the full tune up.  Gotta tell you, the sound of her running for the first time was music to my ears.  Maybe not Beethoven, but waaay better than the Sounds of Silence =)
"I'm telling you Donnie, nuthin' but nuthin' but right"

Offline The Jimbonaut

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Re: Montreal Manchild with an '81 Honda CB750K
« Reply #3 on: Nov 17, 2016, 13:13:06 »
This was the first challenge, check out the state of these carbs -



- and this one was the prettiest =0

"I'm telling you Donnie, nuthin' but nuthin' but right"

Offline coyote13

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Re: Montreal Manchild with an '81 Honda CB750K
« Reply #4 on: Nov 17, 2016, 13:13:25 »
Yes those shocks are aftermarket and shorter than stock.  15" sounds like a WHOLE lot of shock though, you don't want to increase the swingarm angle so much that your chain drags across the top, you'll end up with some very undesirable chain wear and handling characteristics.  I would go maximum 1" over stock.  Should straighten it out just right, anything longer than that and you'll have forward rake which will negatively affect your steering.

Also, the Clymer is good for a lot of things, but there tend to be discrepancies between aftermarket manuals and the originals from Honda.  Still would recommend getting the Honda manual (since it's free anyways) for peace of mind.
Half the fun's in the get there...

Offline The Jimbonaut

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Re: Montreal Manchild with an '81 Honda CB750K
« Reply #5 on: Nov 17, 2016, 13:23:58 »
I'll definitely do that in that case, do you know where I download the Honda manual?  Or maybe just the tune up section?

Thanks for the suggestion on the shocks - what exactly is the stock height?  I'm really grateful for the input buddy, as I said this is a first time for me and I'm definitely all ears when it comes to the rights and wrongs on what to do.  I'd heard that raising the height on the rear shocks can actually be a benefit to the handling, but within reason of course. 

What do you ride?
"I'm telling you Donnie, nuthin' but nuthin' but right"

Offline coyote13

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Re: Montreal Manchild with an '81 Honda CB750K
« Reply #6 on: Nov 17, 2016, 13:32:32 »
'78 CB750, although the motor is out (and has been out for some time now) for a refresh.  Tooling around on a KE100 to keep the blood flowing =D

Quick google search looks like stock length may have been 14" so your idea to go up to 15" may not have been too far off, just sounded really long for some reason.

Factory manuals here:

http://www.dotheton.com/forum/index.php?topic=44399.0
Half the fun's in the get there...

Offline Cookie

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Re: Montreal Manchild with an '81 Honda CB750K
« Reply #7 on: Nov 17, 2016, 13:33:04 »
Welcome to DTT,  Jimbo!
Are you the same Jimbonaut from CB750C.com?
* Insert something witty here *

81 CB750C
84 Tempter - well, most of it...

Offline The Jimbonaut

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Re: Montreal Manchild with an '81 Honda CB750K
« Reply #8 on: Nov 17, 2016, 13:43:11 »
The very same =)

Thanks for the welcome, very glad to be here and I'm learning stuff already.  Forums are like having a small team of experts sitting on my shoulders - without you guys (and YouTube - thank you YouTube) I'd look like one of those monkeys out of 2001 A Space Odyssey, hitting things blindly with sticks and seeing what happened
"I'm telling you Donnie, nuthin' but nuthin' but right"

Offline The Jimbonaut

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Re: Montreal Manchild with an '81 Honda CB750K
« Reply #9 on: Nov 17, 2016, 13:45:25 »
Cheers for the Honda manual link Coyote - I used to run a Kawi up and down volcanoes in Indonesia, man that was a buzz
"I'm telling you Donnie, nuthin' but nuthin' but right"