Wed Jul 06, 2022 10:14 am

Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 438
Location: York, PA
 
Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 438
Location: York, PA
Wed Jul 06, 2022 10:14 am linkquote
For the life of me, I can't find an exhaust elbow to fit the PK125 cylinder on my '66 Blue badge. The studs are 8mm on 56.3mm centers. Bought all of these, nothing fits.

https://www.scootermercato.com/Scooter-Parts/Exhaust/151152 - stud holes are too small and too close together

https://www.scootermercato.com/Scooter-Parts/Exhaust/151152S - fits the studs but interferes with the bottom fin on the head.

https://www.ebay.com/itm/125348373257 stud holes are right size but close together

Any help would be greatly appreciated. Thanks.





Wed Jul 06, 2022 10:47 am

Ossessionato
2007 Stella 225
Joined: 02 Nov 2019
Posts: 2713
Location: Rochester, Minnesota
 
Ossessionato
2007 Stella 225
Joined: 02 Nov 2019
Posts: 2713
Location: Rochester, Minnesota
Wed Jul 06, 2022 10:47 am linkquote
garncarz wrote:
For the life of me, I can't find an exhaust elbow to fit the PK125 cylinder on my '66 Blue badge. The studs are 8mm on 56.3mm centers. Bought all of these, nothing fits.

https://www.scootermercato.com/Scooter-Parts/Exhaust/151152 - stud holes are too small and too close together

https://www.scootermercato.com/Scooter-Parts/Exhaust/151152S - fits the studs but interferes with the bottom fin on the head.

https://www.ebay.com/itm/125348373257 stud holes are right size but close together

Any help would be greatly appreciated. Thanks.
Can you massage option number two? How much fin is in the way? Even with that will exhaust pipe align?
Wed Jul 06, 2022 11:54 am

Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 438
Location: York, PA
 
Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 438
Location: York, PA
Wed Jul 06, 2022 11:54 am linkquote
Christopher_55934 wrote:
Can you massage option number two? How much fin is in the way? Even with that will exhaust pipe align?
The bore of the elbow is big enough that if I cut down the flange that is interfering with the cylinder fin, there would be very little left to engage with the gasket. As for the "fin" its the area in red below....maybe if I had a bridgeport (I don't). Thanks for the ideas though.



Wed Jul 06, 2022 12:18 pm

Ossessionato
2007 Stella 225
Joined: 02 Nov 2019
Posts: 2713
Location: Rochester, Minnesota
 
Ossessionato
2007 Stella 225
Joined: 02 Nov 2019
Posts: 2713
Location: Rochester, Minnesota
Wed Jul 06, 2022 12:18 pm linkquote
garncarz wrote:
The bore of the elbow is big enough that if I cut down the flange that is interfering with the cylinder fin, there would be very little left to engage with the gasket. As for the "fin" its the area in red below....maybe if I had a bridgeport (I don't). Thanks for the ideas though.
Are those studs threaded in? Can you remove them? Then you could install it without having to slide past that spot.
Wed Jul 06, 2022 12:57 pm

Ossessionato
Joined: 26 Oct 2015
Posts: 3574

 
Ossessionato
Joined: 26 Oct 2015
Posts: 3574

Wed Jul 06, 2022 12:57 pm linkquote
Here's a pic of my PK125XL cylinder and a pic of the SIP stainless exhaust elbow. At least on my cylinder, there is a TON of meat that can safely be removed to make room to fit any elbow ever made. It felt like the cylinder was at least 3/8" to 1/2" thick in the offending area.

I'd mask off any and all orifices (in order to keep the grit out), and attack the the cast iron cylinder with an angle grinder.





Wed Jul 06, 2022 1:23 pm

Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 438
Location: York, PA
 
Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 438
Location: York, PA
Wed Jul 06, 2022 1:23 pm linkquote
It's not that I cant get the SIP over the studs, that's OK. It wont lie flush as the circled area below protrudes. Think its OK to grind that spot down?



Wed Jul 06, 2022 1:31 pm

Ossessionato
2007 Stella 225
Joined: 02 Nov 2019
Posts: 2713
Location: Rochester, Minnesota
 
Ossessionato
2007 Stella 225
Joined: 02 Nov 2019
Posts: 2713
Location: Rochester, Minnesota
Wed Jul 06, 2022 1:31 pm linkquote
garncarz wrote:
It's not that I cant get the SIP over the studs, that's OK. It wont lie flush as the circled area below protrudes. Think its OK to grind that spot down?
Slide it on take a picture.

Also take a picture of gasket that goes between cylinder and stub aligned on stub.
Wed Jul 06, 2022 1:41 pm

Ossessionato
Joined: 26 Oct 2015
Posts: 3574

 
Ossessionato
Joined: 26 Oct 2015
Posts: 3574

Wed Jul 06, 2022 1:41 pm linkquote
garncarz wrote:
It's not that I cant get the SIP over the studs, that's OK. It wont lie flush as the circled area below protrudes. Think its OK to grind that spot down?
I would not hesitate to grind down that spot. Like I said above, my cylinder is at least 3/8" to 1/2" thick in that area.
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