OP
UTC

Hooked
'81 Vespa P200e, '85 Vespa PX125e, 1985 T5
Joined: UTC
Posts: 360
Location: St. Catharines, Ontario
 
Hooked
'81 Vespa P200e, '85 Vespa PX125e, 1985 T5
Joined: UTC
Posts: 360
Location: St. Catharines, Ontario
UTC quote
Hey Gurus

Please tell me there is a cheat code on how to effectively apply the appropriate amount of torque on the clutch castle nut using the castle nut tool.

I am having challenges with the tool slipping within the nut snd not being able to meet the torque spec. It's driving a bit batty. It's tight, but not tight enough to spec. I've been through 3 nuts now.

Any tips or tricks?

Thank you.
@grandpanate avatar
UTC

Hooked
'71 Rally 180,'81 P200, 1979 Vespa 90(125), 2023 Ducati Scrambler Pro Stealth
Joined: UTC
Posts: 274
Location: Tempe, Arizona
 
Hooked
@grandpanate avatar
'71 Rally 180,'81 P200, 1979 Vespa 90(125), 2023 Ducati Scrambler Pro Stealth
Joined: UTC
Posts: 274
Location: Tempe, Arizona
UTC quote
On P series, right?

Take the battery out, remove the battery tray, long extension on torque wrench slid through gap on lower right corner will get you dang near perfect alignment to get it done.

Seems like a lot of extra but works for me.
OP
UTC

Hooked
'81 Vespa P200e, '85 Vespa PX125e, 1985 T5
Joined: UTC
Posts: 360
Location: St. Catharines, Ontario
 
Hooked
'81 Vespa P200e, '85 Vespa PX125e, 1985 T5
Joined: UTC
Posts: 360
Location: St. Catharines, Ontario
UTC quote
Yes on a px125.

The engine is out of the bike and on the bench and have direct access to the castle nut. I can't get enough torque on the castle nut. Using the tool keeps slipping.

N
@grandpanate avatar
UTC

Hooked
'71 Rally 180,'81 P200, 1979 Vespa 90(125), 2023 Ducati Scrambler Pro Stealth
Joined: UTC
Posts: 274
Location: Tempe, Arizona
 
Hooked
@grandpanate avatar
'71 Rally 180,'81 P200, 1979 Vespa 90(125), 2023 Ducati Scrambler Pro Stealth
Joined: UTC
Posts: 274
Location: Tempe, Arizona
UTC quote
Nelluch125 wrote:
Yes on a px125.

The engine is out of the bike and on the bench and have direct access to the castle nut. I can't get enough torque on the castle nut. Using the tool keeps slipping.

N
The clutch nut tools were designed by satan and slip constantly.

Motor out (embarrassing confession) I zap the little bastard on with my impact on the lowest setting. I'm not proud of it but it happens. Other than that maybe a second set of hands to hold the basket while torquing would help.
@christopher_55934 avatar
UTC

Ossessionato
2007 Stella 225
Joined: UTC
Posts: 3547
Location: Rochester, Minnesota
 
Ossessionato
@christopher_55934 avatar
2007 Stella 225
Joined: UTC
Posts: 3547
Location: Rochester, Minnesota
UTC quote
Picture of your setup? Are you using any type of extension, if so make it as short as possible? If the castle nut is well used with rounded turrets it could be a real bastard, will want to twist up and out. Out of scooter, I'd set it on the floor nut up, pushing down on the entire setup with my left hand turn with my right.
UTC

Jet Eye Master
PX221 MHR, O tuned PX200, PX125 and some motorbikes
Joined: UTC
Posts: 4544
Location: London UK
 
Jet Eye Master
PX221 MHR, O tuned PX200, PX125 and some motorbikes
Joined: UTC
Posts: 4544
Location: London UK
UTC quote
One of these changes everything
https://www.sip-scootershop.com/en/product/nut-m12-mm-hexagonal-clutch_87261000
Direct replacement for the old style castle nut. Aids better sleeping and more time for beer drinking too. Worth every penny.
@chandlerman avatar
UTC

Lucky
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate, 79 P200E, 66 Lammy S3
Joined: UTC
Posts: 9768
Location: Nashville

24 Days Since Last Explosion
 
Lucky
@chandlerman avatar
76 Sprint V, 63 GL, 62 VBB, 05 Stella, 66 Smallstate, 79 P200E, 66 Lammy S3
Joined: UTC
Posts: 9768
Location: Nashville

24 Days Since Last Explosion
UTC quote
Nelluch125 wrote:
Hey Gurus

Please tell me there is a cheat code on how to effectively apply the appropriate amount of torque on the clutch castle nut using the castle nut tool.

Any tips or tricks?

Thank you.
Sure...don't use a castle nut when you reinstall the clutch

Seriously, get yourself a proper hex nut and use that. The castle nut was a solution that was overtaken by better technology long ago. My castle nut tool literally only has marks on the removal side of the splines and my life is better for it.
@socalguy avatar
UTC

bodgemaster
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: UTC
Posts: 7144
Location: So Cal
 
bodgemaster
@socalguy avatar
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: UTC
Posts: 7144
Location: So Cal
UTC quote
Helps to grind the edge off the tool so it fits down into the clutch. Like so:
Forum member supplied image with no explanatory text
OP
UTC

Hooked
'81 Vespa P200e, '85 Vespa PX125e, 1985 T5
Joined: UTC
Posts: 360
Location: St. Catharines, Ontario
 
Hooked
'81 Vespa P200e, '85 Vespa PX125e, 1985 T5
Joined: UTC
Posts: 360
Location: St. Catharines, Ontario
UTC quote
I essentially tightened it as best I could with the torque wrench and hit it with the impact. Prob not the textbook way of doing it, but I'm sure it's suitable.
@scooterist avatar
UTC

Molto Verboso
71' Sprint Veloce , 05' Vespa PX150, 1978 P200E
Joined: UTC
Posts: 1553
Location: Tucson, AZ
 
Molto Verboso
@scooterist avatar
71' Sprint Veloce , 05' Vespa PX150, 1978 P200E
Joined: UTC
Posts: 1553
Location: Tucson, AZ
UTC quote
GrandpaNate wrote:
On P series, right?

Take the battery out, remove the battery tray, long extension on torque wrench slid through gap on lower right corner will get you dang near perfect alignment to get it done.

Seems like a lot of extra but works for me.
Amen brother!!! that is exactly how I do it. It is the only way that you can secure the tool in a vertical axis and put the pressure downwards.
@safis avatar
UTC

Ossessionato
1979 P150X, 1983 P200E, 1987 PK125XL Elestart, 1988 T5, 1995 PX200E, 2011 Yamaha Fazer 600 S2
Joined: UTC
Posts: 4240
Location: Veria, Greece
 
Ossessionato
@safis avatar
1979 P150X, 1983 P200E, 1987 PK125XL Elestart, 1988 T5, 1995 PX200E, 2011 Yamaha Fazer 600 S2
Joined: UTC
Posts: 4240
Location: Veria, Greece
UTC quote
Next time get yourself a flange type nut by Pinasco, DRT, BGM, etc. and scrap that stupid castle nut. Saves you from the frustration and time...

https://www.sip-scootershop.com/en/product/nut-m12-mm-hexagonal-clutch-pinasco_11351970
@grandpanate avatar
UTC

Hooked
'71 Rally 180,'81 P200, 1979 Vespa 90(125), 2023 Ducati Scrambler Pro Stealth
Joined: UTC
Posts: 274
Location: Tempe, Arizona
 
Hooked
@grandpanate avatar
'71 Rally 180,'81 P200, 1979 Vespa 90(125), 2023 Ducati Scrambler Pro Stealth
Joined: UTC
Posts: 274
Location: Tempe, Arizona
UTC quote
scooterist wrote:
Amen brother!!! that is exactly how I do it. It is the only way that you can secure the tool in a vertical axis and put the pressure downwards.
Aaaaand a side benefit is your not dustin your knuckles on the inside of the frame. Also just a better position in general. And a full turn on the ratchet/torque wrench.
@scooterist avatar
UTC

Molto Verboso
71' Sprint Veloce , 05' Vespa PX150, 1978 P200E
Joined: UTC
Posts: 1553
Location: Tucson, AZ
 
Molto Verboso
@scooterist avatar
71' Sprint Veloce , 05' Vespa PX150, 1978 P200E
Joined: UTC
Posts: 1553
Location: Tucson, AZ
UTC quote
GrandpaNate wrote:
Aaaaand a side benefit is your not dustin your knuckles on the inside of the frame. Also just a better position in general. And a full turn on the ratchet/torque wrench.
Yes, yes and yes. I use a 10" long extension. Recently I started using the new style nuts and not necessarily the cosa nut with the "crushed" end but a different one that is much thinner and comes with a base washer already as a one piece. These new nuts are much narrower and allows you to insert a socket to tighten them.

So here is the ultimate ranking from worst to best:

1) Castle nut. PITA to remove/install. Outer soft metal washer/tab teeth often gets stuck after you bent the teeth outwards.
2) Cosa chushed nut with wavy washer(washer wouldn't fit on certain clutch). It is better than the castle nut though.
3) New design narrow, thin nut with a base acting as a washer(see attachment)
Forum member supplied image with no explanatory text
@socalguy avatar
UTC

bodgemaster
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: UTC
Posts: 7144
Location: So Cal
 
bodgemaster
@socalguy avatar
63 GL, 76 Super (x2), 74 Primavera (x2), 79 P200, 06 Fly 150
Joined: UTC
Posts: 7144
Location: So Cal
UTC quote
Once that castle nut is off (and your knuckles are bandaged) most people throw it and the ridiculous tool directly in the trash, get a flanged nut and washer, and never look back.
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