Can anyone tell me if there are any differences between an 08 and 07 swing arm?

Thanks,
Rick

 

Rick,

PM Dawg and he can compare the part nos. for the two years.

I've been investigating using the parts from an '07 or '08 SE Road King on my '04 EG in order to use a 180 rear tire.

Yesterday, I compared the '08 Touring model rear frame parts to the '07 SE RK parts. The PN for the '08 Touring model swing arm ("Rear Fork" in Harley-speak) is 47549-02A--the "02A" suggests it would be the same for an '07.

The rear fork/swingarm on the SE RK is a painted part so it's a different PN, however, the rear fork shaft (that goes through the swingarm to attach to the frame), is the same part no. as used on the '08, as are all of the bearings, spacers, etc. So, I'd conclude the swingarms are the same for '07 and '08 Touring models.

But PM Dawg or check the parts books at the dealer.

P.S. Why do you ask?

 

I'm doing a swing arm conversion for a friend on his 00 RK. I have what I have been told is a 08 swingarm but the axle which is 25mm seems a little sloppy when slipped into the swing arm. I know at some point they changed from a 1" axle to a 25mm which is a tad smaller.

Rick

 

Can anyone tell me if there are any differences between an 08 and 07 swing arm?
ANS: NO

I've been investigating using the parts from an '07 or '08 SE Road King on my '04 EG in order to use a 180 rear tire.

ANS> The 2009 is the first year of the 180mm/4.75" X 15 rim. There is some strength issues between 2002 to 2006 addressed but nothing external.

I'm doing a swing arm conversion for a friend on his 00 RK. I have what I have been told is a 08 swingarm

ANS> when converting over the swing arm you will need to address the 5/8" trans/pivot shaft and the bearing on the swingarm. The trans is a different casting (<2001 & the 2002> with the larger round gusseting around the pivot shaft housing in the latter. You should not bore. I use this solution.

but the axle which is 25mm seems a little sloppy

ANS> This should not be

 

Strange, I know the axle I have is a 25mm. I bought the swing arm off Ebay and was told it was an 08. Now I'm thinking I got one from a earlier model which uses the 1" axle. Any idea when the switch on the axle size was made?

I was told elsewhere the only difference in the tranny castings was the size of the swing arm pivot hole and these have been drilled successfully using a drill with a 1" long 5/8" pilot. Now you have me wondering.

Rick

 

Rick,
Q> Any idea when the switch on the axle size was made?

ANS> A rear 1" bagger was from 2002 to 2007. The 2008~current had a 25mm. As far as I can see the 2008 has the same physical looking swingarm as a 2002 (not internally as it is different).

I would not recommend drilling your trans as verse to honing with an actual machine. Your clearance is a slip fit and drills tend to wander and you can never get the slip fit tolerance with a drill. You would need an milling machine. Consult an actual machinist, one who knows what they are doing for basic metal and machining principles.

The next problem is the cases are designed differently as there is more material on the tans mount. Measure your "rings" than measure the newer 2002~current model. If there was a need for HD to modify the trans molds HD would have to do it. If HD could sell the earlier trans housing with a 3/4" hole without spending extra money, what would your take in this line of thought?

I have a trans housing with an early PN with a 3/4" trans/swingrm hole I'll sell you cheap. It is only slightly used, as the back 1/2 of the mount is broken off and missing. I had no part in the modification, just R&R the trans for a customer.

The conversion kit requires no drilling and it also addresses the "Rear Steer" problem without a stabilizer while at it.

In closing I might suggest you doing what you feel is right for you. The most important thing is for YOU to do your own research, use common sense, and make up your own mind without someone telling you what to do.

 

If the 08 has the 25mm axle doesn't it seem odd that the 07-08 swing arms are the same part number? It seems like the axle opening on the 08 would be smaller and the swing arm would have a different part number.


If they are indeed different castings then I don't think I want to take the chance drilling it. My only concern with going your route is adding vibration. Is there any cause for concern?

Thanks,
Rick

 

The SERK carries a different PN. 48613-07DH for the black piece. The 2007 Ultra Classic carries PN. 47549-02.... Whats the differents? Does it take a rear fork/swingarm swap to run the a 160/70 B17 or 170/60 B17 Metzeler and 17' Road Winder wheel off a 2007 SERK on a 2007 Ultra? The axles carry different PN's as well 41994-07 on the SERK I for got to write down the PN for the Ultra axle but it was different. The rear sprocket has a different PN but it is also silver and smaller at 66T vers. 71 or 72T on the Ultra, does tthe SERK sprocket have offset built in to it or is it the wheel hub? Everything up front.... inner primary, spacer and sprocket looked to have the same PN's on both the SERK and Ultra. The tranny must be geared lower... or else it would lug really bad in 6th gear or am I looking at the gearing backwards? I forgot to check the belt but it has to be shorter with the smaller sprocket.

So.... Is there a diference in the rear fork on the two models or is it just a paint coding thing? The numbers are different not just the post fix lettering as other HD painted part PN's indicate.

I may get the wheel and try it... then the rear fork, sprocket and axle later if it dont work. If that dont work Punt!!!!! The Metzeler 160/70 B17 is .55" wider that the stock MU85 tire and .16" wider than the Metzeler 150/80 B16 if I remember right.

Also for those who have thought about it the 2009 SERG rear bags are unprotected in primer and carry PN 90768-09 (left) and PN 90788-09 (right) dealer had no price or computer listing as of tonight. The latch covers carry 90674-09 (left) and 90680-09 (right) same deal no price or computer listing yet. These PN's are out of the parts catalogs in the parts department.


Tt

 

yes the 2007-8 serk swingarm is wider along with the rear axle im working on the conversion for 180 18" rear tire now on 2008 street glide have wheel hub set up SE swingarm from hogpro thear great SE axle 1" pully 25mm barring now have a new problem and a 25mm axle spacing issue its always somthing you need a wider fender and a bunch of little parts also back to steeler 4 more parts the defference between 1" and 25mm is .4 mm wont make a diferance in the swing arm holes my 1"SE axle fit in my 08 stock swingarm like a hotdog in a hallway wheel barring are a differnt story