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Old 02-01-2011, 11:24 AM   #1
larryboy OP
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Joined: Jan 2005
Location: On a set of 50,000 mile tires.
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Laugh California Brat Four Nine Zero

Like I really need another project.


My buddy Nixels gave me this 1978 CB550 rolling chassis that I was just planning to use the VIN and title for a different project, but after looking at it for a few months I decided that it needed to live on.




First up? I need a powerplant. YZ490 for $300 from a Craigslist ad? Yeah, that'll work.




Get her on the lift and start mocking up parts.




Rip the 490 to shreds.






Something like that?




I don't like the puffy looking stenciled with spray paint Yammie seat. I dig out on old CR500 seat I have and fab some tabs.




Yeah, that seat looks better. Fender, tail light and plate holder are final.




Time to figure out the motor mounts.




Need to get some supplies to build the motor mounts, so I put on some new grips and modded some old cafe mirrors to fit.




Oh yeah, I have that K&N filter on the shelf that never got used...might fit this thing. Yup, that'll work.




I ordered a few parts that were missing..rear brake pedal, speedometer cable and a cheap factory looking headlight. I've decided to fab a gas tank from scratch.

The front caliper is missing, but my buddy Robert has one for me.


Off to look for some stuff at the metal odds and ends store.


Feel free to poke fun and suggest a wheelie bar or something.
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Old 02-01-2011, 01:21 PM   #2
larryboy OP
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Back from the metal store, that stuff is expensive.


Yeah, that looks good. I don't have a TIG at home so the sheet is a little thicker than I wanted just so I can MIG it.




I'll bend as much as possible to cut down on the welding.




My goal is to ride this thing by the 14th..this month of this year. I've got parts coming for the Baja Bandit and I want this thing off the lift in two weeks.

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Old 02-01-2011, 01:36 PM   #3
DaveRMS
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Subscribed, Rob! That's a super-fun looking build.

I'm also doing a CB project at the moment. It's a CB400F that I'm boring to 466 and putting an early R6 front-end on.

http://forums.sohc4.net/index.php?topic=82531.0

But I give mine a couple of months longer. It's currently 100% disassembled and mostly cleaned. I'm working on the machining for the front hub/brake at the moment. I hope to get the motor work started this week, too.

Dave
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Old 02-01-2011, 01:39 PM   #4
DaveRMS
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BTW, the 490 swingarm would be a cool transplant. Too long I bet, and the travel would be way off. But cool nonetheless.

Dave
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Old 02-01-2011, 01:57 PM   #5
larryboy OP
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Cool project, Dave!!! That's funny that you're doing one too. My bud Robert, just cafe'd a 550 too.


Yeah, the 490 swingarm is really nice...I'm trying to keep this project super simple. Hopefully I can hang onto a YZ490 in a short wheel base bike.
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Old 02-01-2011, 03:12 PM   #6
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If Steve at the museum saw what happened to his old 550 resto project he'd cry.

Or maybe he'd laugh?

As usual, you're taking your sweet time with this...

I'd better get down to DMV and get the plates.
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Old 02-01-2011, 07:57 PM   #7
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nice gas cap
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Old 02-01-2011, 08:26 PM   #8
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I'm in. But I can't say for certain what I'm watching. Can't wait to find out.
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Old 02-01-2011, 11:54 PM   #9
larryboy OP
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Quote:
Originally Posted by Nixels View Post






If Steve at the museum saw what happened to his old 550 resto project he'd cry.

Or maybe he'd laugh?

As usual, you're taking your sweet time with this...

I'd better get down to DMV and get the plates.

Holy crap, it was that Steve's bike? That's super funny.


I WILL do a burnout video in two weeks!!!
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Old 02-02-2011, 12:43 PM   #10
larryboy OP
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Ok, fabbed up a top motor mount.




After a trial fit I need to shorten it about one inch so I can rotate the engine to level out the carb.




Oh yeah.




Looks like I might bring the height of the tank down, went a little tall to clear the pipe..ending up with more pipe clearance than I thought I'd have. Trying for about a five gallon tank.

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Old 02-02-2011, 12:58 PM   #11
Dorzok
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DANG IT!! i don't need another build thread to follow.
thanks a lot. i'm interested in how you're going to title that in Cali.
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Old 02-02-2011, 01:17 PM   #12
larryboy OP
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It's already titled.


Top of the tank is going to have be a lot lower, just ran some numbers on the size and I was over 9 gallons...waaay too much.
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Old 02-02-2011, 01:24 PM   #13
bk brkr baker
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The line between genious and madness is thin indeed.



This will have less suspension than a TM400 with more power.


Hang on!
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Old 02-02-2011, 01:29 PM   #14
Velvet Elvis
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Super cool transformation. Does the front wheel clear the pipe at full compression?
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Old 02-02-2011, 01:32 PM   #15
larryboy OP
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Originally Posted by Velvet Elvis View Post
Super cool transformation. Does the front wheel clear the pipe at full compression?

If it doesn't I'll hit it with the sledge hammer.
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