Mike D's Sex Panther Sportster


Mike D's roots are in motocross, and his taste in choppers shows that influence. Not one to settle for second best, Mike poured way more time and money into this project than he originally planned, but the lessons he learned along the way are priceless. Lots of help from friends and family resulted in a bike he can have a blast riding, and one he can be proud to own.



Owner: Mike D. Ellis

Location: Temecula, CA 

Bike name: Sex Panther 

Engine year and make, model, modifications: 2003 Sportster donor, now a 2010 Special Construction 

Frame: Spartan Frameworks one-off 

Fork: Stock H-D Narrow Glide. shaved legs, massaged and plugged trees, lowered approximately 2.5 inches. Powder coated black 

Engine mods: 1250cc Rev Performance big-bore kit w/ high compressions pistons, Anderson N2 Cams, Dyna 2000i ignition, Benchmark air cleaner and breather bolts, cam and sprocket cover cut down; painted the motor black w/ POR-15 and powder coated the rocker boxes 

Tire/wheel size and style: Front: Stock 19” w/ 100/90-19 Dunlop; Rear: Stock 16” w/ 130/90-16 Dunlop. Both rims were stripped down, powder coated black, hubs were polished and re-laced w/ stainless steel spokes 

Tins: Modified Lowbrow Sporty tank; modified Front Street Cycle rear fender; paint and body work by Got Flake and Blue Moon Kustoms 

Controls: Joker Machine clutch and brake; Biltwell Whiskey throttle, Biltwell prototype Hi-Drags; Goodridge brake lines 

Favorite thing about this bike: Riding it. I can be in a really bad mood, sick, or hungover. Once I get rolling on this thing all my worries go away and I feel better. It’s a blast to ride and the stance and seating position are perfect for me. The only thing I wish I could change would be to add an inch or so of ground clearance, but that might make things too easy

Next modification will be: If I do anything, I might get some work done to the cylinder heads. It’s definitely faster than a regular Sporty, but popping wheelies sounds like fun 

Other mods, accessories, cool parts, etc: Duane Ballard “Sex Panther” seat. Duane knocked this one out of the park. Acme Oil Bag and Battery Box. Jay at Acme and I worked together via e-mail to get this one-off oil bag made and I truly don’t know how he did such a good job without the frame present. Pull start and breather routing by Wompy at Still Kicking. The concept for this thing was great, but executing took much longer than expected. Thanks for sticking in there Juan P. Custom made pipes using the Biltwell Pipe Kit, Acme heatshield and a CNC'd pipe clamp that Wompy made. Flyrite Sprotor chain conversion with a specially machined countershaft sprocket for clearance. Joker Machine Pegs and shift lever. other custom bits include the skid plate, sissy bar, pipe hanger and coil mount

Any building or riding story or info you'd like to include: The year-and-a-half it took to finish this bike was an ass kicker. My inexperience coupled with my OCD nature made this thing drag on and on to a point where I didn’t know if it would be done in theee years. I would not change it for the world, though. Everything happened for a reason and the slow pace of the build allowed me to absorb a ton of knowledge from those who pitched in

Thanks to: Bill and McGoo: You guys gave me loads of great ideas, steered me straight when I thought about doing something lame, taught me the basics of choppin’ and bobbin’, and didn’t let me fuck it up. John Ellis: My dad has been building motors, riding motorcycles, and driving dune buggies his whole life. He had never touched a Harley before we cracked open my motor, but he basically built my motor while I assisted where I could. It runs perfect and I don’t know anyone who could have done a better job. Dad, you are truly inspirational and I love you. George & Wendy at Spartan Frameworks: Thanks for cooking me up a one-off frame. It’s incredible to ride and has bailed me out of a few sticky situations with Mexican potholes. Tyler and Kyle at Lowbrow: Two guys I try hard to outdo, and they don’t make it easy. XOXO. Rob Rouser: My go-to guy whenever I was in a pinch and had a tech question or needed to discuss the wonders of Mochi. Wompy @ Still Kicking: Skilled machinist and chopper parts inventor. Duane Ballard: Master of one of the coolest crafts I’ve ever seen. Erik “The Welder” Seaba: Took care of all the finish welding on the many bungs, bits, and pieces. Wayne and Jay at Acme Choppers: Truly quality parts and good guys to work with. Bryan at Joker Machine; Bro's that inspired me: Kim Boyle, Andy Carter, and Caleb Owens. -Mike

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Commented on 10-26-2011 At 03:11 am

This is one bad sporty.

Commented on 10-26-2011 At 03:26 am

Very Very Nice Panther !!

Commented on 10-26-2011 At 03:56 am

very sick ride! a true beauty!

Commented on 10-26-2011 At 04:11 am

Need more explanation on the pull start!?

Commented on 10-26-2011 At 04:40 am

My favorite sportster! Hyped to see the write up!

Commented on 10-26-2011 At 04:52 am

truly a rel sex panther. hell of a bike man.

Commented on 10-26-2011 At 05:28 am

very nice bike Mike.

Commented on 10-26-2011 At 05:28 am

It's made with bits of real panther. So you know it's good. I love those bars. Great bike, honestly one of my favorites.

Commented on 10-26-2011 At 05:31 am

The pull start is pretty complicates but highly functional. There is a bracket with a lever on it that hangs off the right rear motor mount. The lever pushes on the plunger for the starter and has a post with a bicycle cable attached to it. The cable is hooked to a pull lever that allows me to pull start it from the left side of the bike, away from the pipes and cylinders. The pull start hub also includes a push button on/off switch as well as some routing for my primary breather. Like I said, way over complicated but it works well.

Commented on 10-26-2011 At 05:39 am

sportster get me so horney

Commented on 10-26-2011 At 06:48 am

VERY Nice!!!
You did a great job!

Commented on 10-26-2011 At 07:58 am

This bike is amazing..

Commented on 10-26-2011 At 08:02 am

Sake, mochi, sushi! Three great ingredients for fun times! Motobikes? We are still into those? Come on 2012 is near, time to get into psychedelics!

Yeah Mike!

Commented on 10-26-2011 At 08:20 am

If I was ever gonna steal a bike, this would be it! Great job Mike!!

Commented on 10-26-2011 At 08:40 am

fucken love it. great bike!

Commented on 10-26-2011 At 08:55 am

I still love it how you said your mom asks if you are going to be riding the Sex Panther.. must make you cringe to hear those words out of her mouth hah :) Good work on the bike as well!

Commented on 10-26-2011 At 09:13 am

I've got no comment for the above comment.

Commented on 10-26-2011 At 10:04 am

Is the left side of this bike fucked up or something? It looks so tight, it would have been nice to see it 360. Great build.

Commented on 10-26-2011 At 01:34 pm

Left side is all good. Billdozer just forgot to put up a full size pic of that side.

Commented on 10-26-2011 At 01:41 pm

love this bike. always been a favorite and the paint is cool as hell.

Commented on 10-26-2011 At 01:41 pm

I'll take 1 set of the high drags, por favor, along with the banana seat to fit 04-06 bikes. Quit clownin' around doing handstands and whatnot and get back to developing products, ha!

Love the Panther, Mike. That's just how I'd do it.

Commented on 10-26-2011 At 03:18 pm

SEX!! & PANTHERS!! sounds like a SCR babe

Commented on 10-26-2011 At 03:30 pm

Honestly, what's not to love about this bike?

Commented on 10-26-2011 At 03:41 pm

Best paint idea ever.

Commented on 10-26-2011 At 04:20 pm

Very nice!!! I wouldn't change a thing!

Commented on 10-26-2011 At 04:57 pm

This is by far one of if not my favorite bike.

Commented on 10-26-2011 At 05:09 pm

Thanks again for all the help Rouser. Expect your phone to start blowing up again after the first of the year. Gotta get movin' on the 2012 bike so I can be prepared to evade and survive the zombie apocolypse.

Commented on 10-26-2011 At 05:56 pm

Mike you really did a great job on that bike.

Commented on 10-26-2011 At 06:37 pm

Ha, forgot about the left side. I uploaded a couple at the end of the gallery so you can see it all.

Commented on 10-26-2011 At 07:34 pm

60% of the time, looks good everytime I see it.

Commented on 10-26-2011 At 07:37 pm

Hard to believe it's a first build. Top notch bike. One of mabey three evo sports that really inspire me to build one. I hope to build one soon.

Commented on 10-26-2011 At 08:38 pm

Great way to pop your chopper cherry !!! Can't wait for the next one!! Mikey wanted 3 functions in one confined space so that's the idea behind the pull start/power switch/ breather hose holder. Complicated but worth the effort in the end, wouldn't you say Mike?

Commented on 10-26-2011 At 09:30 pm

great bike! with killer details!!!

Commented on 10-27-2011 At 04:56 am

Bike is FLAWLESS! Excuse me if I'm off here, but wouldnt going to a 21' up front give you some more clearence?

Commented on 10-27-2011 At 07:31 am

Old-Stf Mike, you are too kind. Wompy, it was well worth it.

Commented on 10-27-2011 At 03:03 pm

Man, I hate blacked-out bikes....until now!!!! Man, you made that shit C-L-E-A-N!!!! The gloss gives it life. Blacked out done solid, for sure.

Commented on 10-27-2011 At 04:09 pm

i think it is ugly. worst piece of shit ive ever seen. and i hate you and bill get back to work and get those hi-drags in production. worst bike ever.....:)

Commented on 10-27-2011 At 09:01 pm

So sick Mike. It almost looks too good.

Commented on 10-29-2011 At 05:50 pm

Very nice Mike.. I want them bars for my build, lets get them in the store pronto.

Commented on 10-31-2011 At 09:50 am

high drags

Commented on 11-1-2011 At 04:07 pm

Wow super sweet. Congrats. Inspiring.

Commented on 11-15-2011 At 03:29 pm

man, I love this bike.

It's illegal in 9 countries and 60% of the time, it works every time!

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