Harley big twins? WTF is a "little twin'? (novel) - The Jockey Journal Board

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Old 09-10-2019, 02:42 AM   #1
Flynn's_61
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Default Harley big twins? WTF is a "little twin'? (novel)

I'm trying to build one. They ain't Sporties. 1969(ish) Servicar flathead w/the Solo intake and a Mikuni carb. Aftermarket "re-pop" frame. Haven't measured it. Do I need to? DNA springer. The ad said it was 2" under but it looks like 3-4 over. Need to learn to shorten a DNA springer I guess. 21" front 1960's hamburger drum, 3/4 axle. I'm using money I should put back into my home, but instead after losing all my possessions in one of those damn trendy California wild fires I'm buying FREEDOM.

So I got out with my newish truck, and clothes I had on. Grandpa's spectacles with my own prescription lenses were in the glovebox.
Later I saw some stranger guy that saved his hot-rodded old-school triumphs (they looked like dirtbikes but I looked hard, it was unit British engines,) and I was so proud and envious of his genius.
Bike's fits in the back of a truck.

I am under 40 years old and have no legal riding experience, never owned a motorcycle license and never really practiced when I had my permit on public land.
I've ridden 3-wheeler ATV's. I rode my Triumph short-chop on public streets and private lands with insurance but no license and received a scar for being so inconsiderate.

It's important to me to learn how to ride on Harley's little twin,
I own all the major parts-

But-
Maybe a Norton or Pre-unit is a better choice?
They're faster.
But... Naw. I want an Indian.
But that ain't happening, so, we go "lil' twin,".
(I'm a smaller man and want the option of pushing my old-school broke down ride home. Tows get expensive. Anyways, Lil twin,).

Maybe pics later.
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Old 09-10-2019, 01:15 PM   #2
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Default Re: Harley big twins? WTF is a "little twin'? (novel)

Good luck in your endeavors Flynn!
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Old 09-10-2019, 02:40 PM   #3
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Default Re: Harley big twins? WTF is a "little twin'? (novel)

Oh man. I know how stupid "Sorry you lost nearly all of your possessions" must sound, but I'll say it anyway.

Thing about (say) a Nortoon vs. a 45" is, owning the former will make it easier to think positively about a trans-Sierra road trip, or for that matter about going any significant distance. Then there are further questions of capability (brakes and good handling) and aesthetics (elegance vs. its opposite) and the other question, which is: are you okay with pissing blood and walking funny long before you get old?

None a my business, of course, merely my very subjective two-tenths of a cent worth.
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Old 09-12-2019, 12:47 AM   #4
Flynn's_61
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Default Re: Harley big twins? WTF is a "little twin'? (novel)

Thanks VonWegener!

Ratso- Thanks man, it's weird. I had like 5 cars (hot rod/custom) projects and a bike project. And my record collection was TITS. The thing is my 45 is going to be a perfect bobber (in my mind). I plan on running over-sized acorn nuts on the heads (which is something I've never seen in real life) and a bunch of other cool, little touches. I'm sure I won't be doing anything "new", but it will be stuff I haven't seen put together all on one bike. If I can get it done that is!
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Old 09-12-2019, 12:56 AM   #5
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Back wheel was 19", didn't seem to fit. Now I've got a 16" w/a tire that won't seat
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Old 09-12-2019, 01:23 AM   #6
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Default Re: Harley big twins? WTF is a "little twin'? (novel)

I'm seeing excellent proportions here. I'd go 18" rear wheel and if I can help you with parts I will gladly supply you with what you need near my cost to help offset mother nature's wrath.
Regarding Ratso's Norton/Harley 45 debate. I love Nortons. I had a Commando. It was a great motorcycle. Easy starting smooth ride. I have short legs. I hated that she was so tall. It was uncomfortable. If they were lower I'd own a commando scrambler in blue factory metalflake with the high pipes.
Now while a 45 with less than than half the horsepower of a Norton is no screamer they do reward the rider with that low RPM torquey grunt Harley feel. I'm sure you will love it Flynn.
Pics are of Jeff Leighton's blue 45. A wonderful machine. Dan Weston's panel painted flattie from 1958 and Germany's Bernard Elflein's magnificent 45 chopper. Class all the way.
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Old 09-12-2019, 08:10 AM   #7
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Default Re: Harley big twins? WTF is a "little twin'? (novel)

Quote:
Originally Posted by Flynn's_61 View Post
Need to learn to shorten a DNA springer I guess. 21" front 1960's hamburger drum, 3/4 axle.
FYI- because of how the springer articulates, you need to get creative with that drum so that the backing plate is free-floating and move as the springer cycles up and down.
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Old 09-12-2019, 04:08 PM   #8
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Default Re: Harley big twins? WTF is a "little twin'? (novel)

I misunderstood your first post -- thought you were still weighing which bike to build. Your 45-so-far looks real good. The less you surround it with, the more prominent, i.e., better focused, the engine will be. I mean, for instance, I wouldn't run the stock tanks.
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Old 09-14-2019, 02:07 PM   #9
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Default Re: Harley big twins? WTF is a "little twin'? (novel)

Are you sure you trust a DNA springer?
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Old 09-14-2019, 03:03 PM   #10
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Default Re: Harley big twins? WTF is a "little twin'? (novel)

You are almost there! Transmission and some leftovers from friends garages and its ready to go.


Black and Decker drill + Cresent wrench = Done
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Old 09-15-2019, 08:20 AM   #11
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Default Re: Harley big twins? WTF is a "little twin'? (novel)

Second what Scott said about the front drum. My former 45 has/had a Honda CB350 front drum which was fine, I never tried the Sportster drum, though. A few observations - I had this on both the track and registered on the street. The 34 mm Mikuni is the way to go. Others here will disagree, the I thought the Linkert was a PITA. The power is more than fine around town and occasional jaunts on the slow lane of the highway, but I wouldn't try much more than that. The engine is stone simple, and you can still get NOS parts wrapped in WWII era newspaper. You can get new hot cams, strocker flywheels, heads, cylinders, etc. These were dirt cheap at one time (before my time) but prices are a little crazy now for nice stockish examples. The stock three speed sucks and doesn't like being ridden in anger. I wasn't brave enough to try and rebuild mine myself, but I know it's a lot more challenging than a four-speed BT tranny. Also, avoid the later electric start Servicar transmissions with electric start. I can't remember the cutoff year, but they didn't have provisions for kickstart. If you haven't bought one yet, for the cost of a transmission and rebuild, you won't be far from buying a Samwell (probably the maker of your frame) brand new four-speed (looks identical on the outside). Did I mention how much I hate the three-speed? This was the only bike I've owned with a suicide clutch, and left turns from a stop took some learning. I used the stock 45 pogo seat, and added a valve spring (outer) from a Chevy 427 after bottoming out the pogo and compressing my spine a few too many times. Never tried one, but I heard some negative stuff about the DNA springers. I had a V-Twin repop and it was fine.

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Old 09-15-2019, 11:22 AM   #12
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Default Re: Harley big twins? WTF is a "little twin'? (novel)

I love this place.

Learned some new things today.

Thanks.

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Old 09-16-2019, 01:28 AM   #13
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Default Re: Harley big twins? WTF is a "little twin'? (novel)

me too
i need that chevy valve spring.
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Old 09-16-2019, 11:03 AM   #14
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Default Re: Harley big twins? WTF is a "little twin'? (novel)

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me too
i need that chevy valve spring.
This site has a number of valve spring dimensions listed - it's where I got the dimensions for the 427 spring. There weren't a lot of springs with a large enough ID to fit around the 45 seat post. I can't recall where I was able to buy only one spring, though. It might have been the same company.

http://www.crower.com/media/pdf/2008b/166-180.pdf

Ratso - I wasn't crazy about the stock tanks, either. I used narrowed WR style tanks. You can get good, high quality ones from Samwell for a price (they won't need any additional work, though), or eBay and the like. If you end up using a separate oil tank, as opposed to the stock right side tank for oil, you can go with narrowed fuel tanks and make your life a lot easier.
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Old 09-16-2019, 06:37 PM   #15
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Default Re: Harley big twins? WTF is a "little twin'? (novel)

Separate oil tank looks nicer, too. IN MY OPINION. Ahem.
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