what year flywheels

Bottom End (crankcases and crankshaft)
Post Reply
Claude
Inactive member
Junior Member
Posts: 3
Joined: Tue Jan 26, 2010 7:33 am
Bikes: 1953 pan 1999 road king 1979 chopped sportster
Location: New york State

what year flywheels

#1

Post by Claude »

Hi...I have a milkcrate Pan motor that I realize to be different years. the cases don't match and so on. Thanks to this site, What fits What, and the manual I'm figuring most things out. However, I Don't know what year flywlheels I have and what years are compatible. the #s on the side are 150 40 3 f, and 30-3 on the tag. There is also a 7 stamped on the outer ring. Any help would be appreciated.

Thanks. Claude
RUBONE
Moderator
Senior Member
Posts: 8376
Joined: Sat Nov 15, 2008 4:09 am
Bikes: Multiple H-D, Ducati, BMW, Triumph, BSA,...
Has thanked: 478 times
Been thanked: 2933 times

Re: what year flywheels

#2

Post by RUBONE »

Claude, what year is the Pan as not all of them use the same wheels. there are several variations. And post a picture of the flywheels showing the casting #s.
Robbie
panz4ever
Senior Member
Posts: 696
Joined: Sat Jun 05, 2004 5:55 pm
Bikes: EL, FXE & FLH
Has thanked: 20 times
Been thanked: 74 times

Re: what year flywheels

#3

Post by panz4ever »

the 30-3 I believes refers to the March 30th; gonna suggest the 3-f refers to June 53 0r 63? (since HD used letter/number codes to represent years in some of the other raised marks...heads on my 49 have a code of K-7, tranny of I-8). Course wouldn't be the first time I was wrong
Claude
Inactive member
Junior Member
Posts: 3
Joined: Tue Jan 26, 2010 7:33 am
Bikes: 1953 pan 1999 road king 1979 chopped sportster
Location: New york State

Re: what year flywheels

#4

Post by Claude »

thanx guys. sounds great, cause its supposed to be a 53'. I'm working on the pic, (not good with the computer.)
RUBONE
Moderator
Senior Member
Posts: 8376
Joined: Sat Nov 15, 2008 4:09 am
Bikes: Multiple H-D, Ducati, BMW, Triumph, BSA,...
Has thanked: 478 times
Been thanked: 2933 times

Re: what year flywheels

#5

Post by RUBONE »

The casting code of 150-40 is good if you have a '53. All big twin flywheels from '40 to '54 interchange, however there are 74ci and 61ci versions. The center to center distance on the mainshaft to crankpin hole is half the stroke. So a 61 would measure 1 3/4 inches which is half of 3 1/2. A 74 would be just under 2 inches for the 3 31/32 stroke. Easy to check and who cares about the casting date code as they all work.
Robbie
steinauge
Inactive member
Senior Member
Posts: 521
Joined: Tue Feb 03, 2009 10:05 pm
Bikes: 1938U,1949FL,1961FL,1968XL,1979FL ,1958 FL, 1965 BMW,1975 Honda CB750
Been thanked: 14 times

Re: what year flywheels

#6

Post by steinauge »

The real easy way to spot a 61" flywheel is to try a -41 crankpin in it.
panz4ever
Senior Member
Posts: 696
Joined: Sat Jun 05, 2004 5:55 pm
Bikes: EL, FXE & FLH
Has thanked: 20 times
Been thanked: 74 times

Re: what year flywheels

#7

Post by panz4ever »

RUBONE wrote:The casting code of 150-40 is good if you have a '53. All big twin flywheels from '40 to '54 interchange, however there are 74ci and 61ci versions. The center to center distance on the mainshaft to crankpin hole is half the stroke. So a 61 would measure 1 3/4 inches which is half of 3 1/2. A 74 would be just under 2 inches for the 3 31/32 stroke. Easy to check and who cares about the casting date code as they all work.
Robbie
Robbie since he has a basket, seems he is just trying to figure what the heck he has to start with in order to determine if it would work., and from there determining if it is 61 or 74.
NightShift
Senior Member
Posts: 534
Joined: Tue Apr 21, 2009 4:20 pm
Bikes: Two Schwinns, a Hercules, and a Hiawatha
Location: Underground in Illinois
Has thanked: 3 times
Been thanked: 6 times

Re: what year flywheels

#8

Post by NightShift »

Robbies right,
You got to check the stroke first to see if the wheels can even mate. Thats why one of them needs to have an extra hole for oil. Next you check the tapers for damage, then the flywasher damage. Tossaways all go into the same milk crate every time.

Respectfully,
steinauge
Inactive member
Senior Member
Posts: 521
Joined: Tue Feb 03, 2009 10:05 pm
Bikes: 1938U,1949FL,1961FL,1968XL,1979FL ,1958 FL, 1965 BMW,1975 Honda CB750
Been thanked: 14 times

Re: what year flywheels

#9

Post by steinauge »

Shifty-if you want little flywheels you have to leave the shaft on one too.Why worry about the washers? they are easy to replace unless the counterbores are wallowed out and you can even fix that if you want too bad enough.Being REALLY cheap I usually want to. :)
NightShift
Senior Member
Posts: 534
Joined: Tue Apr 21, 2009 4:20 pm
Bikes: Two Schwinns, a Hercules, and a Hiawatha
Location: Underground in Illinois
Has thanked: 3 times
Been thanked: 6 times

Re: what year flywheels

#10

Post by NightShift »

steinauge wrote:Shifty-if you want little flywheels you have to leave the shaft on one too.Why worry about the washers? they are easy to replace unless the counterbores are wallowed out and you can even fix that if you want too bad enough.Being REALLY cheap I usually want to. :)
Dear Steinauge,
But the shaft has to go in and out and sometimes more than once.
The washers always get replaced but the boogers around them can get serious, so I left that for last. Especially since fixing wallowed counterbores aint cheap a'tall.

Respectful,
Claude
Inactive member
Junior Member
Posts: 3
Joined: Tue Jan 26, 2010 7:33 am
Bikes: 1953 pan 1999 road king 1979 chopped sportster
Location: New york State

Re: what year flywheels

#11

Post by Claude »

Hey guy....I measured the wheels like Rubone said. Its a 74"... It measured 1"15/16. There are two sets of connecting rods they both measure 7"7/16ths.
I'm trying to sort everthing out so I can start with the long shopping list. Thats just the motor, the frame a whole other nightmare.
Post Reply

Return to “Bottom End / Crankcases / Flywheels”