84 CR80/XR100 hybrid build

sgthubbard#60
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Millers Falls, MA US

Don’t post much anymore these days but this build has been too much fun to not share. Started with this roached 84 CR80 that was missing the topend and pipe and an XR100 engine. I’m a metal fabricator and have a fully outfitted shop at my disposal which made any of this possible. All work has been done myself. 72132391502  201F3FD8-F514-4608-8067-203CD662D84C

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sgthubbard#60
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Millers Falls, MA US
2/8/2024 4:29am

First things first, the engine cradle obviously had to be cut out and a new one fabricated as well as the cross brace between the backbone and down tube to make room for the taller XR cylinder and head.IMG 6295

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sgthubbard#60
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2/8/2024 4:33am

Shock reservoir mounts, coil mounting points and engine mounts also needed to be relocated. Fabbed up an HRC style case guard and glide plate as well.IMG 6308IMG 6455.jpeg?VersionId=g

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sgthubbard#60
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2/8/2024 4:34am

Fresh coat of Flash Red powder coat to cap it offIMG 6458.jpeg?VersionId=U

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sgthubbard#60
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Millers Falls, MA US
2/8/2024 6:02am

Made up some aluminum front motor mounts and milled up a serrated brake pedal tip as well IMG 6453IMG 6460 0

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The Shop

sgthubbard#60
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Millers Falls, MA US
2/8/2024 6:04am

Powder coated swingarm, linkage, fork lowers, triple clamps, pegs, case covers, valve cover, etc….. IMG 6457 0

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2/8/2024 6:58am

Looking forward to this one.  Best of luck to you, Sir. 

sgthubbard#60
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2/8/2024 8:01am

No 80’s Honda is complete without gold rims. Low gloss black powder coat on the hubs and brake panels as well.IMG 6454 0

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sgthubbard#60
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2/8/2024 8:07am

Since the carb is on the opposite side on the XR and much higher I fabbed up this intake/air filter cage setup that fits in place of the original CR air boot.IMG 6437 0.jpeg?VersionId=z5S MIMG 6438.jpeg?VersionId=5I68LbQqtbuBdteql.jmTu2ObWbcKIMG 6441 0

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sgthubbard#60
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Millers Falls, MA US
2/8/2024 9:03am

Icing on this mini cake…. The stock CR tank wouldn’t sit low enough on the frame to fit right since the XR cylinder and head are so tall. My solution was to chop away at the stock tank until it cleared the topend then replicate it from aluminum. Here she is…IMG 6452.jpeg?VersionId=abwZATBhQi7Id2UKVyKCLpIMG 6397IMG 6398IMG 6394 0

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sgthubbard#60
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Millers Falls, MA US
2/8/2024 9:08am

Making a simple bracket to attach the CR shroud to woulda been lame so fabbed up this air louvre the same dimensions as the CR radiator. It aligns perfectly with the cylinder and head. Also powder coated this low gloss black.IMG 6413IMG 6456 0

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sgthubbard#60
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Millers Falls, MA US
2/8/2024 9:10am

IMG 6443Milled up a aluminum chain guide with HDPE upper and lower sliders

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sgthubbard#60
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2/8/2024 9:14am

LOTS of wet sanding and polishing on the original OEM plastic later I’m finally happy. Some custom swingarm decals and period correct Answer Products decals along with an original DeBruzer bar pad. IMG 6462IMG 6463.jpeg?VersionId=istv.7HZRByW 4FJ.f2bzGIlUmyAJtIMG 6451

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sgthubbard#60
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2/8/2024 9:55am

Modified the routing of an FMF XR100 exhaust to fit the hybrid build. IMG 6464

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sgthubbard#60
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2/8/2024 1:19pm

So it’s pretty much done other than some little stuff like chain, backgrounds, mud flap and a right hand side panel. All are on the way though. Here are some detail pics out in sun.IMG 6471 0

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sgthubbard#60
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2/8/2024 1:26pm

MSR AOF levers for both clutch and brake (just run one upside down for the brake) disassembled and powder coated low gloss black.IMG 6476.jpeg?VersionId=9Rmw5IMG 6473.jpeg?VersionId=Q3tnjl9 RG03ck

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sgthubbard#60
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765
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2/8/2024 1:30pm
Forgot to mention, this also has a BBR 120 big bore kit with cam and BBR heavy spring. Went with the Kenda tires because they look just like the old Dunlop 752’s from back in the day.
38special
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US
2/8/2024 4:29pm

Oh my.  Beautiful craftsmanship and bike.  Thanks for sharing.

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sgthubbard#60
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Millers Falls, MA US
2/9/2024 10:43am
38special wrote:

Oh my.  Beautiful craftsmanship and bike.  Thanks for sharing.

Thank you! 

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Bearuno
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6/28/2014
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AU
2/9/2024 9:14pm Edited Date/Time 2/9/2024 11:33pm

Is this a display bike, or is it going to be used in a Drum Brake Mini 4t class of sorts?

There's a Lot of beautiful work you've done there.

But, if it's going to being ridden hard, it would have been wise to valence a tube gusset from down the CR frames downtube, onto the tiny XR ( I assume it's the std, or size of the original XR piece) downtube, right down to the cradle loop. Decades ago, when I'd do Monoshock XR conversions, I'd do such a thing (well, All the way from the head tube down the tiny little downtubes) . So many XR downtubes just went 'pop' when really abused. And, when you have such a heavier, sturdier tube  going to a much smaller tube junction, well, the forces really concentrate at that point. 

 I really like the radiator louvre mount, though, having an oil cooler in it, would be a great thing if the bike is going to be hammered.

But, to repeat, there's a Lot of beautiful work you've done there Cool

Oh, here's an interesting thread on ADVrider, of a fellows XR100 Framer build  - well, and a SuperMoto / DTX build.

https://advrider.com/f/threads/xr100-mini-framer-mad-dog-flat-tracker.1…

A neat thing, though that bloody drooping / curved brake lever stands out like Macadoo's what's it's. Can't understand why the builder made it that way - I thought he might intend to do a short, cross over underneath Megaphone exhaust system, that might need such a thing, but, no, no indication of it.

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rmxfreak
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5/26/2017
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NZ
2/10/2024 1:31am

Very cool !

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