Author Topic: Bobber  (Read 4452 times)

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Offline Lumbee

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Bobber
« on: April 04, 2008, 11:09:49 AM »
Chopped the frame...added 4" to the down tubes.  1 1/4" Beefy Bars and HD controls up top.  4 into 1 with 4" Automotive Pipe.  No baffles.  ;D
« Last Edit: April 04, 2008, 11:16:12 AM by The great "Lumbee" »
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Offline my78k

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Re: Bobber
« Reply #1 on: April 04, 2008, 12:19:24 PM »
WOW!!!  :o  :o   :o

Me likey!!!! VERY nice job indeed!

Dennis

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Re: Bobber
« Reply #2 on: April 04, 2008, 06:28:39 PM »
Lumbee, just right modifications I would say. love the stance and profile of your bobber. Those bars and controls do it justice.

Offline mystic_1

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Re: Bobber
« Reply #3 on: April 04, 2008, 09:52:29 PM »
Nicely done Konging and extended swingarm.  What's the rear wheel off of?

mystic_1
"A ship in harbor is safe, but that is not what ships are built for."
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Offline heffay

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Re: Bobber
« Reply #4 on: April 04, 2008, 10:14:43 PM »
so THAT'S where you've been!

no lumbering for the lumbee, i guess!

looks great.
Today: '73 cb350f, '96 Ducati 900 Supersport
Past Rides: '72 tc125, '94 cbr600f2, '76 rd400, '89 ex500, '93 KTM-125exc, '92 zx7r, '93 Banshee, '83 ATC250R, 77/75 cb400f

Offline Lumbee

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Re: Bobber
« Reply #5 on: April 05, 2008, 06:56:30 AM »
...rear wheel is off a 95 Yami FZR...150 tire...lines up nicely with the 750 motor.
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luckydevil

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Re: Bobber
« Reply #6 on: April 05, 2008, 07:55:54 AM »
Looks Great.

Offline 754

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Re: Bobber
« Reply #7 on: April 05, 2008, 09:00:08 AM »
WOW  :o

That looks pretty good for minimal work done.

A few suggestion, hope you dont mind..

Get your coils under the carbs or into the starter cavity & run you wires thru the barrels, then to the plugs.

Round off the corner of the old frame part where the shock mounts are, top edge from existing frame down to the lowered seat rail.

Build oil tank that folows frame lines a bit, and deep tunneled gas tank.

I bet that bike will be really nice on the highway & can do high miles per day.. the position of the tank  will block a bit of the wind.
Maker of the WELDLESS 750 Frame Kit
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Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

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Lost quite a few CB 750's along the way

Offline mystic_1

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Re: Bobber
« Reply #8 on: April 05, 2008, 09:06:38 AM »
That looks pretty good for minimal work done.

Minimal work??  You have pretty high standards, mate! lol  :D

Agree with your suggestions though, particularly relocating the coils.

mystic_1
"A ship in harbor is safe, but that is not what ships are built for."
- John Augustus Shedd

My build thread:  http://forums.sohc4.net/index.php?topic=68952.0

Offline 754

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Re: Bobber
« Reply #9 on: April 05, 2008, 09:26:41 AM »
Let me explain,

By minimal, I mean not an extensive time & cash outlay.

This one shown may be done with litle tube bending and no full frame fixture. Building a full frame is many times over the amount of work this would be. So would be buiding a frame fixture..

The one pictured could be done at home by a lot of  builders, a full frame is much more difficult..imo..
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline mystic_1

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Re: Bobber
« Reply #10 on: April 05, 2008, 10:43:34 AM »
Yup, I agree that building a full frame from the ground up would be much more work :)


Lumbee, you gusseted the shock mount area didn't you?  I can't tell from the pics, but I've heard stories on the net about people having cracks and bending in that area after konging their frames.


mystic_1
"A ship in harbor is safe, but that is not what ships are built for."
- John Augustus Shedd

My build thread:  http://forums.sohc4.net/index.php?topic=68952.0

Offline Tim.

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Re: Bobber
« Reply #11 on: April 05, 2008, 10:54:57 AM »
Looks great - only suggestion I have is the rear wheel seems a wee bit small, or perhaps it's the tire, but overall it looks like it could use a couple inches of diameter.
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Offline Lumbee

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Re: Bobber
« Reply #12 on: April 06, 2008, 07:19:47 AM »
...thanx for all the comments...I agree that this is a great frame mod for people without a jig.  The tubing that I used to sleeve the down tubes was a very snug fit.  This allowed me to bump the sleeves on with a mallet, and was a snug enough fit to hold everything in place while I was welding.

Quote
Build oil tank that folows frame lines a bit, and deep tunneled gas tank.

...I didn't build the oil tank, it was one on the cheap "chopper" oil tanks off ebay.  I needed one with side fill, and that would hold a battery...so I made work what was available.  Same with the gas tank.  Its an HD aftermarket (mustang?).  If I were building/fabbing the oil and gas tank up myself, I could have paid a little more attention to those things...good observations though.

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Round off the corner of the old frame part where the shock mounts are, top edge from existing frame down to the lowered seat

Yea...I didn't like leaving that area, but I didn't want to touch it for fear of compromising the integrity of the frame. 

Quote
Get your coils under the carbs or into the starter cavity & run you wires thru the barrels, then to the plugs.

Heres an area I disagree with most on.  All the chops (well, both of them) I've built with the coils/wires "out there".  I like the utilitarian look of it.  I go with Accels rather than stock, which helps the aesthetics.  Kind of like a clock being build in a clear case.  Allows you to see more of the innterworkings...makes it easier to troubleshoot too.

Quote
you gusseted the shock mount area didn't you?

I moved the shock mounts back with a 1/2 peice of threaded rod.  The rod goes all the way through both of the upper frame rails, and is welded on all sides.  Then on top of that there is that 3" wide piece thats on the stock frame.  I cut it off, then flipped it over so I could get the seat to sit lower.

Quote
rear wheel seems a wee bit small

...perhaps, though I like low profile tires.  Either way, I'm really pushing the clearance between the tire/fender.  Only about 3"...not sure if thats going to be enough or not...and bigger tire would def cause me to bottom out.
« Last Edit: April 06, 2008, 07:26:13 AM by The great "Lumbee" »
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WestCo

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Re: Bobber
« Reply #13 on: May 16, 2008, 11:39:05 PM »
im a little late on this thread but its looking very good
did you extend the swingarm yourself?
im thinking about trying it, ive got an extra swingarm laying around


Quote
Get your coils under the carbs or into the starter cavity & run you wires thru the barrels, then to the plugs.

Heres an area I disagree with most on.  All the chops (well, both of them) I've built with the coils/wires "out there".  I like the utilitarian look of it.  I go with Accels rather than stock, which helps the aesthetics.  Kind of like a clock being build in a clear case.  Allows you to see more of the innterworkings...makes it easier to troubleshoot too.

Agree with you 100%, stuff like that brings your attention more to the heart and soul of the beast, esp if its high performance stuff. IMO
« Last Edit: May 16, 2008, 11:45:26 PM by WestCo »

Offline Lumbee

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Re: Bobber
« Reply #14 on: May 17, 2008, 11:15:11 AM »
...yeah, I extended the swingarm myself...this will give you idea of where I cut and how I jig...

http://picasaweb.google.com/marklocklear/Misc/photo#5197047020719164786

...I just box it in with 1/4" plate.  I've got a couple that I've welded up if u'r interested...$40 to u'r door...
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