Mon Jun 13, 2022 2:28 pm

Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
 
Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
Mon Jun 13, 2022 2:28 pm linkquote
V oodoo wrote:
Maybe just semantics, but I've not seen or heard of roller bearings on both sides of the crank. One of them needs to be a ball bearing to handle thrust. Your crank needs to be 'trapped' or your helical primary pinion can push it sideways until something that's spinning hits something that's not.

Older smallie cases had TWO ball bearings and they are harder to split than newer ones like yours that has a split two piece needle or roller bearing outboard.
I see. Makes perfect sense. Thanks.
Sat Jun 18, 2022 5:15 am

Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
 
Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
Sat Jun 18, 2022 5:15 am linkquote
Bearings are going back in today. I have the roller bearing spaced 1.0 mm off the base of the crank and am getting some light contact between the crank counter balance and the case, when the case is horizontal though not when it is vertical. Should it be further out?

Also, Is it safe to assume that the gear stack tolerance for smallies is the same as for large frames: 0.15mm - 0.40mm.

Thanks.









Last edited by garncarz on Sat Jun 18, 2022 12:07 pm; edited 1 time in total
Sat Jun 18, 2022 11:59 am

Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
 
Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
Sat Jun 18, 2022 11:59 am linkquote
r_fostoria wrote:
If you need any help or extra parts or want to look at mine for reference, let me know. I just went through all this stuff myself and might have some spares laying around.
Thanks again for all of your help.
Sat Jun 18, 2022 12:50 pm

Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
 
Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
Sat Jun 18, 2022 12:50 pm linkquote
garncarz wrote:
You guys are right. Cover me, I'm going in. This is my first time inside a smallie motor, anyone have a link to a step by step? Thanks again.
Thu Jun 23, 2022 1:50 pm

Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
 
Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
Thu Jun 23, 2022 1:50 pm linkquote
Got the gearbox back together. The "cruciform" spring and bearings were interesting, read a fucking ball buster. I know I wanted to half ass this in the beginning, but I am glad now that I stripped it all the way down. On to the clutch......





Thu Jun 23, 2022 8:18 pm

Veni, Vidi, Posti
'15 GTS300, '86 PX125EFL, '66 VBB, '04 Ninja 250
Joined: 04 Apr 2013
Posts: 5993
Location: San Diego, CA
 
Veni, Vidi, Posti
'15 GTS300, '86 PX125EFL, '66 VBB, '04 Ninja 250
Joined: 04 Apr 2013
Posts: 5993
Location: San Diego, CA
Thu Jun 23, 2022 8:18 pm linkquote
just seeing your motor pics makes me miss building a small frame engine. will have to go there again sometime, but I have at least 1-2 large frame projects in the queue.
Fri Jun 24, 2022 3:20 am

Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
 
Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
Fri Jun 24, 2022 3:20 am linkquote
Definitely more fun to wrench on than my VNB5M.
Sat Jun 25, 2022 7:31 am

Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
 
Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
Sat Jun 25, 2022 7:31 am linkquote
Got the clutch rebuilt today. At 21:45, the rebuild video above shows the guy applying RTV to the cylinder head: No, correct?




PK125 jug and Polini head

Sat Jun 25, 2022 5:20 pm

Ossessionato
Joined: 24 Jan 2008
Posts: 2079
Location: Santa Margarita,Ca.
 
Ossessionato
Joined: 24 Jan 2008
Posts: 2079
Location: Santa Margarita,Ca.
Sat Jun 25, 2022 5:20 pm linkquote
Why are you using the Polini head? Usually you want the piston crown to relate to the squish band.
Sun Jun 26, 2022 3:43 am

Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
 
Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
Sun Jun 26, 2022 3:43 am linkquote
scootermarc69 wrote:
Why are you using the Polini head? Usually you want the piston crown to relate to the squish band.
I recognize the individual words you have used as being from English, beyond that, I have no idea what you said. Seriously though, I don't understand your comment. Can you explain "squish band"?

Here's what I have to work with:

1. Polini cylinder with some rust in it. Will need to be bored out.
2. Polini head in great shape.
3. Polini piston. Heavily scuffed with stuck rings.
4. PK125 cylinder. Looks new-ish.
5. Piagio 125-90 head. Looks to be in good shape.
6. Piston on engine. New, never used.

Thoughts on how to configure, based upon the above? Thanks.



Sun Jun 26, 2022 7:36 pm

Ossessionato
Joined: 24 Jan 2008
Posts: 2079
Location: Santa Margarita,Ca.
 
Ossessionato
Joined: 24 Jan 2008
Posts: 2079
Location: Santa Margarita,Ca.
Sun Jun 26, 2022 7:36 pm linkquote
The squishband is the area of the cylinder head between the outer bore and the combustion bowl. It is shaped to match the dome of the piston. Most stock heads don't have squish bands, the later PK ones might, not sure. The kits had squash bands particular to their pistons.
Sun Jun 26, 2022 7:42 pm

Style Maven
'74 50s x3 '78 P200 E '84 Cosa '91 PK50XL2 '58 AllState '68 Sprint '80 50special and a '66(?) Super125
Joined: 22 Nov 2010
Posts: 8613
Location: seattle/athens
 
Style Maven
'74 50s x3 '78 P200 E '84 Cosa '91 PK50XL2 '58 AllState '68 Sprint '80 50special and a '66(?) Super125
Joined: 22 Nov 2010
Posts: 8613
Location: seattle/athens
Sun Jun 26, 2022 7:42 pm linkquote
4. PK125 cylinder. Looks new-ish.

Does this have the internal 3rd port? Picture please?
Mon Jun 27, 2022 3:16 am

Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
 
Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
Mon Jun 27, 2022 3:16 am linkquote
Here is the bore of the PK125 cylinder.



Mon Jun 27, 2022 3:18 am

Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
 
Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
Mon Jun 27, 2022 3:18 am linkquote
scootermarc69 wrote:
The squishband is the area of the cylinder head between the outer bore and the combustion bowl. It is shaped to match the dome of the piston. Most stock heads don't have squish bands, the later PK ones might, not sure. The kits had squash bands particular to their pistons.
So, to use the Polini I would need the matching piston and cylinder. Thanks for the education!!
Mon Jun 27, 2022 8:52 am

bodgemaster
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: 26 Sep 2013
Posts: 6438
Location: So Cal
 
bodgemaster
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: 26 Sep 2013
Posts: 6438
Location: So Cal
Mon Jun 27, 2022 8:52 am linkquote
The Polini head will work just fine with the PK cylinder. In fact, it's an upgrade.
Mon Jun 27, 2022 9:15 am

Style Maven
'74 50s x3 '78 P200 E '84 Cosa '91 PK50XL2 '58 AllState '68 Sprint '80 50special and a '66(?) Super125
Joined: 22 Nov 2010
Posts: 8613
Location: seattle/athens
 
Style Maven
'74 50s x3 '78 P200 E '84 Cosa '91 PK50XL2 '58 AllState '68 Sprint '80 50special and a '66(?) Super125
Joined: 22 Nov 2010
Posts: 8613
Location: seattle/athens
Mon Jun 27, 2022 9:15 am linkquote
^^^ that's exactly what I'd use, you already have all the parts. Your 3 port PK cylinder looks mint but be sure to chamfer the port edges and maybe smooth the exhaust port if you like to fuss. It looks like you have the tall Primavera primary gears, so it's not gonna jump off the line like a rabbit, but will have long legs and should go pretty fast.

Now if it's fast enuff, you're done, just enjoy. But if not go ahead and sort that Polini stuff in no hurry, find a good pipe and maybe even a bigger carb while you can still ride it around. But I'll bet you will be happy w/ that fresh PK 125 top end, I'm kinda jelly. Probably the last unticked bike on my bucket list is a lo mile stock late model PK125. A blue one, please.
Mon Jun 27, 2022 11:45 am

Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
 
Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
Mon Jun 27, 2022 11:45 am linkquote
Thanks gents.
Tue Jun 28, 2022 12:50 pm

Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
 
Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
Tue Jun 28, 2022 12:50 pm linkquote
Making progress on the reassembly. Kinda struggling to find an exhaust elbow that fits the PK125 cylinder though. The studs are 8mm on 56.3mm centers. Bought both of these...no joy.

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.

Anyone have insights on the proper part? Thanks.




PK125 exhaust port

Tue Jun 28, 2022 2:44 pm

Style Maven
'74 50s x3 '78 P200 E '84 Cosa '91 PK50XL2 '58 AllState '68 Sprint '80 50special and a '66(?) Super125
Joined: 22 Nov 2010
Posts: 8613
Location: seattle/athens
 
Style Maven
'74 50s x3 '78 P200 E '84 Cosa '91 PK50XL2 '58 AllState '68 Sprint '80 50special and a '66(?) Super125
Joined: 22 Nov 2010
Posts: 8613
Location: seattle/athens
Tue Jun 28, 2022 2:44 pm linkquote
Your motor looks so gorgeous now! What muffler are you planning to use? I think with most aftermarket pipes you don't need that part anyway. But you could try enlarging and elongating the holes - I had to do that once.


Very nice example, not mine.
Tue Jun 28, 2022 2:49 pm

Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
 
Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
Tue Jun 28, 2022 2:49 pm linkquote
Thanks. All I needed to do was clean off half a century of shit and neglect.

I have this stock exhaust.

https://www.scootermercato.com/Scooter-Parts/Exhaust/SITO209
Wed Jun 29, 2022 12:15 pm

Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
 
Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
Wed Jun 29, 2022 12:15 pm linkquote
I have the mill all back together except for the exhaust elbow, which I am still struggling to find. Any help would be greatly appreciated. I think it turned out ok. Thanks for everyone's help.







Wed Jun 29, 2022 12:20 pm

Hooked
'66 Sears Cruisaire Smallframe
Joined: 12 Aug 2019
Posts: 160
Location: York, PA
 
Hooked
'66 Sears Cruisaire Smallframe
Joined: 12 Aug 2019
Posts: 160
Location: York, PA
Wed Jun 29, 2022 12:20 pm linkquote
Looking at SIP, it seems like the PK has a different stock exhaust, too. Maybe the cylinder, elbow, and exhaust are all PK specific.
Thu Jun 30, 2022 12:37 pm

Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
 
Hooked
1964 Piaggio Allstate Cruisaire
Joined: 15 Aug 2021
Posts: 431
Location: York, PA
Thu Jun 30, 2022 12:37 pm linkquote
SIP has it, but it kills me to pay $40 in shipping from Germany. Mercado is out of stock. Anyone have one they are willing to part with? Khajiit?
Thu Jun 30, 2022 12:53 pm

Hooked
'66 Sears Cruisaire Smallframe
Joined: 12 Aug 2019
Posts: 160
Location: York, PA
 
Hooked
'66 Sears Cruisaire Smallframe
Joined: 12 Aug 2019
Posts: 160
Location: York, PA
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