What am I looking at, 'cus I have no clue..

[T. Cotten]

Snagged off the Web, Folks!

It said HD but looks a lot like a Chief I had..

Is the cylinderhead 'bored' assembled and torqued?

...Cotten
PS: Good trick!
I did some Lycomings once't. No I didn't.

PPS: Thanks in advance as always..

[badger34]

Photo originates from the folks in Springfield.

Attachment 24356

[MMasa]

ID grinding of a cylinder bore, probably at a few thou taper.
Mark

[gharper]

Those are Powerplus cylinders. Single piece cylinder and head casting. Large threaded plugs screw in above the valves for access. This same design was used on the Chief through 1926, removable heads came in 1927. The Scout used the same design but went to removable heads in 24 or 25 I believe.

[T. Cotten]

So the heads are integral!

(Like Lycomings...)

It made me think they were bolted on for fastener stress distortion, but the early design eliminates all that.

Many thanks to Everybody,

....Cotten
PS: Honing a taper is tedious!

[T. Cotten]

Here's another one that has me clueless, Folks!

(Sorry its post '30, but the carb design is earlier.)

What did Rollie Free have around his Schebler at Daytona?

Thanks in advance of course,

....Cotten

[JoJo357]

Here's another one that has me clueless, Folks!

(Sorry its post '30, but the carb design is earlier.)

What did Rollie Free have around his Schebler at Daytona?






Thanks in advance of course,

....Cotten

Ahhhhh Yes--That’s “Chickadee” Cotten. That record breaking 1937 Indian Sport Scout is a stock M/C under AMA rules regarding the standing mile runs on the Daytona Beach course. So the carb would be a stock DLX-107.
As far as the insulator wrap shield around the carb, that is for cooling and keeping salt and sand out of the carb, since the front fender was stripped.
Despite the race course being choppy, and had crosswinds of 14-17 mph, Rollie still broke the Petrali H.D. 45’’ class C by 9.5 mph in 1938.
I was fortunate enough to buy Jerry Hatfield’s wonderful book called…”Flat Out!” The Rollie Free Story. Bought it in 2007, a Great Read, a shame it is a fortune to buy currently!
3-8.jpg >>>AMA Boss E.C. Smith & Rollie Free's victorious record breaking hand shake. This photo was also an Indian promotional for the Sport Scout's, except the celebratory 'hooch' in E.C.'s back pocket was blocked out!--haha.
3-1jpg-cmyk-wide.jpg >>>"Skin To Win".

*M.A.D.*

[T. Cotten]

... So the carb would be a stock DLX-107....

It looks like a bronze bowl to me,*M.A.D.* !

And the chokelever looks funny, too.

....Cotten

[T. Cotten]

...As far as the insulator wrap shield around the carb, that is for cooling and keeping salt and sand out of the carb, since the front fender was stripped.

When would you need to keep a carb cool, *M.A.D.*?

I'm easily confused..

Thanks in advance,

....Cotten
PS: I get it now!
The front fender directs air around the front cylinder like the old 'blow out the candle behind a bottle' trick,.. but its gone, right?..

Or is that a stinkin' Linkert hidden under that shroud?

[JoJo357]

Haha, maybe E.C. Smith was half in the bag and didn't do a tech check on ole' "Chickadee!" Or...he hated Harley-Davidson as much as Rollie did!!! Hard to tell Cotten, but i would say it was a Schebler carb hidden behind that shroud. Rollie was hell bent on breaking ANY record held by the Motor Company. He only had a few chances at it also, and elected to run when Daytona Beach had 17mph crosswinds & a Lousy beach surface. In "Flat Out", Rollie explained that H-D waited till they had ideal race conditions to make their runs. So, i imagine Free had to use every trick in his book to pull off a win. Keeping gas cool keeps it from becoming vaporous. An old trick was to put aluminum foil on the gas lines. Stripping that heavy front fender was 2 fold. Lost some legal weight, but then the tire kicked up sand & salt. Rollie had a difficult time keeping the throttle pegged also, because of the rough track. I would say that he made a few trial runs, and then compensated, which might vaguely explain the...'mysterious shroud'? Or, it may be as simple as just a precaution to keep anything from entering the carb on a sanctioned one shot run. It's kinda like the infamous bathing suit Vincent salt flat runs. When Free's 1st run was short of the 150mph mark, only then did he strip down.
winchester-1910-motorcycle-worlds-most-expensive-32.png.jpg

*M.A.D.*