Police siren

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FL54
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Police siren

#1

Post by FL54 » Mon Nov 05, 2018 12:49 am

I picked up a rear wheel police siren with most of the hardware to mount on a 67-69 FLH. My question is the siren incompatible with a dual exhaust system? I've got the correct shock stud and I picked up the bracket 91310-67 but there doesn't seem to be enough room for the siren. Were all Police Specials single exhaust? Also, I've read conflicting accounts. Does the brake line have to be repositioned and is there a bracket (part #) to offset the brake line. Thanks in advance.



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Re: Police siren

#2

Post by RUBONE » Mon Nov 05, 2018 1:17 am

Police units were all single exhaust. The brake line repositioning bracket is needed.
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FL54
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Re: Police siren

#3

Post by FL54 » Mon Nov 05, 2018 2:23 am

Thanks Robbie. I knew you would reply and have the right answer. I overlooked the bracket in my parts book but found 42298-67. Now I have to find one and convert to single exhaust. My '67 has an aftermarket dual exhaust from a PO so that's the one I will replace. Thanks again.

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Re: Police siren

#4

Post by Doc37W » Tue Nov 06, 2018 7:59 pm

FL54 wrote:
Mon Nov 05, 2018 2:23 am
Thanks Robbie. I knew you would reply and have the right answer. I overlooked the bracket in my parts book but found 42298-67. Now I have to find one and convert to single exhaust. My '67 has an aftermarket dual exhaust from a PO so that's the one I will replace. Thanks again.
All you need to go to single exhaust is a single rear header pipe down to the 'Y' pipe. Everything else is the same. Doc

FL54
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Re: Police siren

#5

Post by FL54 » Wed Nov 07, 2018 3:26 pm

Roger that Doc. Thanks for reply. I just picked up a front and rear header pipes on eBay because they came together. Also got a cigar muffler. I never liked the aftermarket exhaust with fishtails that came on the bike so this forced me to change them out.

FL54
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Re: Police siren

#6

Post by FL54 » Sun Nov 11, 2018 2:43 pm

Haven't received all the parts yet but was able to mount the siren yesterday. Even though I ordered the bracket to reposition the brake line, the siren clears the brake line where it's mounted on the frame. Also, shock stud was the same as the "Police " stud that I ordered. Maybe in a former life this was a Police Special. This bike has an unknown history and I wouldn't trust anything the PO would say. The speedometer and the exhaust were aftermarket when I got the bike. Have a buddy with a '66 that is a Police Special from SFPD and it has the brake line bracket so who knows.

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Re: Police siren

#7

Post by RUBONE » Sun Nov 11, 2018 6:24 pm

The "police" shock stud should have a shoulder width that is shorter by the thickness of the siren bracket to keep the shocks aligned properly.

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Re: Police siren

#8

Post by FL54 » Mon Nov 12, 2018 12:08 am

You're right again Robbie. My thinking was 180 degrees off. I was thinking the threaded part though the swing arm would be longer to compensate for the thickness of the bracket not the shock side. Glad I ordered the correct one Thanks again for your knowledge and willingness to share same.

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