Twin cam ?

Closed Thread Subscribe

Thread Tools

Search this Thread

Jan 18, 2010 | 01:08 PM

#11

o/d

Tourer

Joined: Aug 2007

Posts: 486

Likes: 41

From: north jersey

Quote:

Originally Posted by terrysillik

Thought i would bring this back to the front, any body have any help on this question? terry

as far as i know, "b" is the balanced engine -as found in softail models.i beleive "a" is the un-balanced motor.i would *** ume that the serial # would tell you what year it is.

Jan 18, 2010 | 01:18 PM

#12

DGDyna

Tourer

Joined: Oct 2007

Posts: 463

Likes: 2

From: Buffalo, NY

You might want to bring this up in the Dyna forum. A lot of knowledgeable guys there.

Jan 18, 2010 | 02:03 PM

#13

oct1949

Club Member

Joined: May 2007

Posts: 145,895

Likes: 821

From: 40 miles Northeast of Indy..

Quote:

Originally Posted by terrysillik

Is the A the early one and the B the later one? How do you tell which one you have, by the year of the bike or is there something in the seriel no.? terry

"A" motors is what the Dyna's and touring bikes use, rubber mounted, when the TC 88's came out in the softails, they balanced the cranks making them smoother (non-rubber mount). Thus the B motor.

Jan 18, 2010 | 02:11 PM

#14

cadman311

Club Member

Joined: Feb 2007

Posts: 4,892

Likes: 2

From: DUNDALK,MARYLAND

The (A) motor hangs the rear swing arm and wheel off the trans. The (B) motor are the motor with the oil tank on the side. The (A) motor oil is in the pan.

Jan 18, 2010 | 02:37 PM

#15

legacycycles

Oops

Joined: Sep 2007

Posts: 333

Likes: 0

From: Pantego,NC.

All "B" engines are softail Solid mount only.If the engine is outta the bike,the "B"Engine is phyically bigger on the bottom.This is where there is about 20lbs of Sh$% spinning around in the bottom of them...."A"engines are in everything else,which are all rubber mounted."A" Engines when outta the bike look more like the typical V-Twin engine...Year models can be identified by the vin number on the engine also.

Jan 18, 2010 | 03:16 PM

#16

Harley_Dude

Ultimate HDF Member

Joined: Jul 2007

Posts: 5,716

Likes: 103

From:

Quote:

Originally Posted by terrysillik

Is the A the early one and the B the later one? How do you tell which one you have, by the year of the bike or is there something in the seriel no.? terry

No, the A motor is rubber mounted (Dynas & Touring), the B is balanced and rigid mounted (Softails). The cases are different.

Jan 18, 2010 | 06:59 PM

#17

seniorsuperglideE8

Supporter

Joined: Jan 2007

Posts: 15,788

Likes: 5,625

From: along the shore of Mishigami

From everything I've read about the Magneti-Marelli EFI system, which was/is on the early twin cams, they had a lot of problems. One thing in mind comes to not helping the engine produce the horsepower a stock engine could. Just tweak your carb engine.

Jan 18, 2010 | 08:06 PM

#18

nighttrain72970

Tourer

Joined: Oct 2008

Posts: 360

Likes: 0

From: O'fallon, Missouri

Quote:

Originally Posted by oct1949

"A" motors is what the Dyna's and touring bikes use, rubber mounted, when the TC 88's came out in the softails, they balanced the cranks making them smoother (non-rubber mount). Thus the B motor.

Yeah, what OCT said!!!

HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

7 Times Harley-Davidson Chucked Tradition Out the Window

Verdad Gallardo

7 Surprising Harley-Davidson Products that Are Not Motorcycles

Verdad Gallardo

8 Best Harley-Davidson Motorcycles Ever

Pouria Savadkouei

10 Worst Harley-Davidson Motorcycles Ever

Pouria Savadkouei

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Verdad Gallardo

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Verdad Gallardo

Harley-Davidson Reveals Super Cool Cafe Racer Concept

Verdad Gallardo

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Verdad Gallardo

10 Motorcycles You Should Never Buy

Joe Kucinski

10 Things Harley-Davidson Needs to Fix in 2026

Verdad Gallardo

Jan 18, 2010 | 08:17 PM

#19

wescoot2

Road Master

Joined: Jul 2006

Posts: 805

Likes: 6

From: Burb of Chicago

Quote:

Originally Posted by cadman311

The (A) motor hangs the rear swing arm and wheel off the trans. The (B) motor are the motor with the oil tank on the side. The (A) motor oil is in the pan.

If you can see the engine, the above is the key to knowing if it's an A or B motor.