Engine Case Stud Stripped!
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Enthusiast
61 VBB and 79 P200
Joined: 01 Jan 2018
Posts: 83
Location: Folsom CA
Mon Feb 22, 2021 5:13 pm quote
shit - this well-priced P200 has been a funhouse so far.

One of the short studs behind the stator stripped out the case, so it needs adressing with a heliocore or something...maybe JB Weld, maybe time-set.

I'm curious what route has been successful in the past for others.
Molto Verboso
Joined: 03 Nov 2011
Posts: 1173
Location: Racing Capital of the World
Mon Feb 22, 2021 5:44 pm quote
do not use JB WELD.

that should be a m7 bolt. just buy this:https://www.mcmaster.com/m7-helicoil-insert-repair-kits/ or have a shop do it for less.

how did it strip out? that takes talent.
Enthusiast
61 VBB and 79 P200
Joined: 01 Jan 2018
Posts: 83
Location: Folsom CA
Mon Feb 22, 2021 10:08 pm quote
GickSpeed wrote:
do not use JB WELD.

that should be a m7 bolt. just buy this:https://www.mcmaster.com/m7-helicoil-insert-repair-kits/ or have a shop do it for less.

how did it strip out? that takes talent.
I was resealing the case after a rebuild...went to torque it to specs and it stripped out. Considering all the other issues I've seen with this scoot, I'm not surprised it happened.
Enthusiast
61 VBB and 79 P200
Joined: 01 Jan 2018
Posts: 83
Location: Folsom CA
Mon Feb 22, 2021 10:20 pm quote
GickSpeed wrote:
do not use JB WELD.

how did it strip out? that takes talent.
I appreciate your comment so much...
Sergeant at Arms
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: 21 Oct 2005
Posts: 8493
Location: The state of insanity, SoCal
Tue Feb 23, 2021 12:13 am quote
Just to confirm, the stud is stripped out of the clutch side of the case? Like one of the ones that doesn’t leave when you’re splitting the cases?

If so... ohhh baby... depending on which one and what bag of trick ya gots, you may be looking at a trip to the machinist.

Give us the pics!

-g
Enthusiast
61 VBB and 79 P200
Joined: 01 Jan 2018
Posts: 83
Location: Folsom CA
Wed Feb 24, 2021 10:15 am quote
greasy125 wrote:
Just to confirm, the stud is stripped out of the clutch side of the case? Like one of the ones that doesn’t leave when you’re splitting the cases?

If so... ohhh baby... depending on which one and what bag of trick ya gots, you may be looking at a trip to the machinist.

Give us the pics!

-g
Ask and yee shall receive - the M7 stud stripped out. I was using a torque wrench below the actually specs; it was the only stud or bolt that had an issue.

IMG_5787.jpeg

IMG_5786.jpeg

Enthusiast
61 VBB and 79 P200
Joined: 01 Jan 2018
Posts: 83
Location: Folsom CA
Addicted
'64 Motovespa 150S (177) , '66 Allstate SF, '64 VBB, '66 180SS
Joined: 27 Mar 2013
Posts: 792
Location: S.Salem, NY
Wed Feb 24, 2021 1:13 pm quote
You realize you are going to have to split the cases to do that properly, right ? You might want to check the others when you do.
Molto Verboso
Joined: 03 Nov 2011
Posts: 1173
Location: Racing Capital of the World
Wed Feb 24, 2021 1:37 pm quote
Asian made; big difference!
Molto Verboso
Joined: 03 Nov 2011
Posts: 1173
Location: Racing Capital of the World
Wed Feb 24, 2021 1:38 pm quote
Moto64 wrote:
You realize you are going to have to split the cases to do that properly, right ? You might want to check the others when you do.
That is correct.
Molto Verboso
Joined: 03 Nov 2011
Posts: 1173
Location: Racing Capital of the World
Wed Feb 24, 2021 1:39 pm quote
Asian made; big difference!
Enthusiast
61 VBB and 79 P200
Joined: 01 Jan 2018
Posts: 83
Location: Folsom CA
Wed Feb 24, 2021 4:33 pm quote
Moto64 wrote:
You realize you are going to have to split the cases to do that properly, right ? You might want to check the others when you do.
yep - everything else tourqued fine. After that fiasco, I decided to check the rest and they're good.

Also, not sure why Asian solutions are a problem with respect to this...general distrust or a specific experience with thread inserts? Not everything out of Asia is shite, including actual Helicoil products, which are from India, I believe.
Ossessionato
76 Sprint V, 63 GL, 62 VBB, 05 Stella
Joined: 16 Jun 2011
Posts: 3058
Location: Nashville
Thu Feb 25, 2021 6:13 am quote
I'd spend the extra cash for a Time-Sert kit, myself.

And while that stud absolutely should not have stripped--the torque spec is barely more than hand-tight--if someone went all socket gorilla on that one, they probably did it on all of them and you may need to replace the others at some point when they fail, too.
Sergeant at Arms
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: 21 Oct 2005
Posts: 8493
Location: The state of insanity, SoCal
Sun Feb 28, 2021 2:47 am quote
on this one, i'm okay with a heli-coil. i'd prefer a timesert but because of location and forces on it i think a heli-coil would be fine and dandy. i'd replace that stud for sure, though.

either way you be splittin' dem cases again hombre.

-g
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