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@oscarsass avatar
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Hooked
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Hooked
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UTC quote
Hello - so sat by the road waiting for a friend with a van.

Suspect crank / front pulley failure... I could hear chunks flying around under the cover... lost drive (but engine still revved).

...kick start not engaging the front pulley.

Nut was brand new, torqued and thread locked - so REALLY hope that it didn't bloody come off!

More new shiny parts I guess. 🤣
@touring300 avatar
UTC

Ossessionato
GTS 300ie Touring 2013 - Signora D'argento
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Location: Lancaster, U.K.
 
Ossessionato
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GTS 300ie Touring 2013 - Signora D'argento
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UTC quote
Sorry to hear of your trouble. Hopefully you'll find nothing too serious when you open it up. Please keep us posted.
UTC

Veni, Vidi, Posti
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Veni, Vidi, Posti
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UTC quote
Sounds like the belt broke and was shredded.
@jet_peddler avatar
UTC

Veni, Vidi, Posti
'07 LX150 (Sold), '17 GTS300, '16 BV350, '15 EN650, '09 FXDF (sold). '15 FLSTN
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Veni, Vidi, Posti
@jet_peddler avatar
'07 LX150 (Sold), '17 GTS300, '16 BV350, '15 EN650, '09 FXDF (sold). '15 FLSTN
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UTC quote
Tierney wrote:
Sounds like the belt broke and was shredded.
Exactly what I was thinking.

Good luck!
UTC

Molto Verboso
2023 Genuine Buddy 125
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Location: Norfolk, VA
 
Molto Verboso
2023 Genuine Buddy 125
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UTC quote
Belts snap. Hopefully that's all it is. Keep us posted.
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Hooked
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Hooked
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UTC quote
My biggest fear - variator/crank nut. Lasted about 600 miles before coming loose. I was doing about 45MPH at the time.

Very disappointed - not because of having to fix it, or spend a few ££ on new bits.... more because the workshop manual was followed and everything was done properly. I had a 1000nm impact wrench at my disposal (with 3 settings - tight, very tight, tight as f***) but chose to use a torque wrench.

Thing is, inside the variator cover - there was evidence that this happened before (while the bike wasn't in my posession). The question is whether the threads on that crank are in spec? Is that a possibility? Everything was clean and dry when installed - no oil or residue.

Just about got away without having to split the engine case - this time, I'm going all out torquing the bugger (stuff the specs)... and it's getting red thread lock (not blue).

New bits needed:
-Front pulley (not in stock).
-Variator/crank nut
-Variator fan.
-Kickstart castle washer (engaging thingy that goes on top of the pulley).
-Kickstart pinion gear.

For safety (to be sure):
-Oil belt. It was new, but with chunks of stuff flying around in there I'm not risking it.

A fair bit of brake-clean will be consumed getting it all spick and span.

🛵💨
⚠️ Last edited by OscarSass on UTC; edited 1 time
@coddy avatar
UTC

Addicted
2021 GTS 300 Supersport, Triumph Tiger 800
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Location: Oxford, UK
 
Addicted
@coddy avatar
2021 GTS 300 Supersport, Triumph Tiger 800
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UTC quote
You stranded this weekend, me stranded last weekend!

Scooter ownership can be frustrating at times. At least you got yours home, I'm still waiting for mine to be recovered 9 days later.
@kz1000st avatar
UTC

Molto Verboso
Dongfang 170cc, CF Moto Fashion 250
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Location: Hyde Park, New York
 
Molto Verboso
@kz1000st avatar
Dongfang 170cc, CF Moto Fashion 250
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UTC quote
I hate to keep bringing him up but Steve Williams original scooter was a 150cc. AS I remember the story he changed the belt and his scooter self destructed. He said he had misplaced the washers upon assembly which finally settled in, loosened the nut and chewed up his crankshaft. I'm not an authority but before tightening the nut too much make sure that all systems are in their proper configuration.
@mjrally avatar
UTC

Veni, Vidi, Posti
73 & 74 Rally, 76 ET3, 80 P200, 06 PX150, 59 Ser 2, 65 Silver Special, 90 V5N 50, 2015 HD Road Glide Special
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Veni, Vidi, Posti
@mjrally avatar
73 & 74 Rally, 76 ET3, 80 P200, 06 PX150, 59 Ser 2, 65 Silver Special, 90 V5N 50, 2015 HD Road Glide Special
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UTC quote
Ouch! Hopefully no spline or thread damage on the crank?
@dooglas avatar
UTC

Veni, Vidi, Posti
GTS 300ABS, Buddy 125, Buddy Kick 125
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Location: Oregon City, OR
 
Veni, Vidi, Posti
@dooglas avatar
GTS 300ABS, Buddy 125, Buddy Kick 125
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UTC quote
OscarSass wrote:
The question is whether the threads on that crank are in spec? Is that a possibility?
I agree. This is a possibility that should be investigated.
OP
@oscarsass avatar
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Hooked
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Hooked
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UTC quote
MJRally wrote:
Ouch! Hopefully no spline or thread damage on the crank?
Just about got away with it - a bit of time with a wire brush sorted it. Phew. Outer/front pulley will be replaced though.
kz1000ST wrote:
I hate to keep bringing him up but Steve Williams original scooter was a 150cc. AS I remember the story he changed the belt and his scooter self destructed. He said he had misplaced the washers upon assembly which finally settled in, loosened the nut and chewed up his crankshaft. I'm not an authority but before tightening the nut too much make sure that all systems are in their proper configuration.
Will definitely check again and again. 🤞🤞
Coddy wrote:
You stranded this weekend, me stranded last weekend!

Scooter ownership can be frustrating at times. At least you got yours home, I'm still waiting for mine to be recovered 9 days later.
Yikes - that's really frustrating! I was adamant it wasn't sitting by the side of the road to be taken apart by vultures (dodgies). Hope you don't mind me gloating about the quick recovery.
⚠️ Last edited by OscarSass on UTC; edited 1 time
OP
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Hooked
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Hooked
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UTC quote
So - a few bits are good... and some not:

Drive belt good. Variator good.

Castle nut bad. Outer pullet bad. Oil belt embedded with debris.
⚠️ Last edited by OscarSass on UTC; edited 1 time
OP
@oscarsass avatar
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Hooked
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Hooked
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UTC quote
Previous inspection (at 125 miles) showed no cause for concern.

I might do a visual every 200 miles, and mark the nut & pulley to make it easy to spot a loosening.
⚠️ Last edited by OscarSass on UTC; edited 1 time
UTC

Member
et4 125
Joined: UTC
Posts: 49
Location: Hampshire England
 
Member
et4 125
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Location: Hampshire England
UTC quote
sounds like a good plan

just a thought have you tested your torque wrench ?

at work (rail industry) we have a digital tester we use each time we set one up
surprising how far out they can be
they can go out of calibration as they age the spring weakens
especially if the spring isn't wound off after use

good luck
hope its all good now
OP
@oscarsass avatar
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Hooked
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Hooked
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UTC quote
sparkplugofdestiny wrote:
sounds like a good plan

just a thought have you tested your torque wrench ?

at work (rail industry) we have a digital tester we use each time we set one up
surprising how far out they can be
they can go out of calibration as they age the spring weakens
especially if the spring isn't wound off after use

good luck
hope its all good now
Yes - good point, it could be out of calibration. 👍
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Banned
2006 GTS 250
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Banned
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UTC quote
Wha? emoticon that's a great idea and then when you're done with it spray paint it with golden sparkles
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