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Ossessionato
'70 Super 150, Medley 150S, '23 Ducati Monster SP
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Location: Sydney, Australia
 
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'70 Super 150, Medley 150S, '23 Ducati Monster SP
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Scoot is an Aprilia SR MT (125 Leader engine). Smell seems like it's coming from the belt. I removed the cover and the belt looks new although there is a bit of sooty stuff under the cover. It has 7000KMs on it. What should I be looking for? Time for a new belt?Slipping clutch? Any ideas appreciated.
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@juan_orhea avatar
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Molto Verboso
S150 '09, Beo 500ie '08
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Molto Verboso
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S150 '09, Beo 500ie '08
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The only rubber thing in there to smell like hot rubber is the belt. If you don't know how old it is, it's time to replace it. You might be able to distinguish a very worn belt by looks, but you can't really tell anything visually about old rubber that might be slipping on the transmission and getting hot.
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Ossessionato
'70 Super 150, Medley 150S, '23 Ducati Monster SP
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'70 Super 150, Medley 150S, '23 Ducati Monster SP
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Thanks for that. Dealer that sold me the Scoot said the belt was done at 10,000 KMs (now has 17,000) but who knows if he was bullshitting me. He had no service records. I guess I'll order a new belt and rollers. Never replaced them before as I'm fairly new to twist and go scoots. Will be a good learning experience.
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Molto Verboso
S150 '09, Beo 500ie '08
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Location: Bermuda
 
Molto Verboso
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S150 '09, Beo 500ie '08
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Location: Bermuda
UTC quote
I'd suggest making sure you have the variator lock tool so you can torque the nut down properly on reassembly, but aside from that it's a straightforward job. Make absolutely sure you replace the parts in the same order they came off, and there's no reason to mess with the clutch parts in the back (to the right in your photo). Just let it be and remove the belt around the rear (driven) pulley.
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Ossessionato
'70 Super 150, Medley 150S, '23 Ducati Monster SP
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Location: Sydney, Australia
 
Ossessionato
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'70 Super 150, Medley 150S, '23 Ducati Monster SP
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Location: Sydney, Australia
UTC quote
Thanks again. I have the tools. I watched Robot do it and looks pretty straight forward.
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Ossessionato
'70 Super 150, Medley 150S, '23 Ducati Monster SP
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Location: Sydney, Australia
 
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'70 Super 150, Medley 150S, '23 Ducati Monster SP
Joined: UTC
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Location: Sydney, Australia
UTC quote
I just remembered another symptom. Occasionally the scoot isn't returning to full idle and I don't feel the 'neutral' feeling when the clutch disengages. Sign of bad clutch, sticking roller? This all started a couple of days ago when I rode the scoot quite hard on a longer trip, most of it into a headwind.
@juan_orhea avatar
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Molto Verboso
S150 '09, Beo 500ie '08
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Posts: 1280
Location: Bermuda
 
Molto Verboso
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S150 '09, Beo 500ie '08
Joined: UTC
Posts: 1280
Location: Bermuda
UTC quote
Idling faster than it should probably has nothing to do with the clutch. And my Leader engine (150) doesn't do anything dramatic at all when the clutch disengages, so I'm not sure what you mean by "neutral" feeling. After you replace the belt and rollers, rough up the inside of the clutch bell and clutch pads, ride a while, then reassess.
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Ossessionato
'70 Super 150, Medley 150S, '23 Ducati Monster SP
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'70 Super 150, Medley 150S, '23 Ducati Monster SP
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UTC quote
Will do. Belt and rollers ordered. Thanks mate.
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Molto Verboso
2006 LX150 (carbed) | 2007 GT200
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Molto Verboso
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2006 LX150 (carbed) | 2007 GT200
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Posts: 1930
Location: Toronto
UTC quote
The one time I had a burning rubber smell, it was the mud guard sagging and rubbing against the rear tire. If this bike is similar to a GT, it might have a mudguard just behind the airbox. Any rub marks on your rear tire?
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Hooked
2013 BV350, 2014 GTS , 2016 GTS, 2013 Downtown 300i, 2018 Like 150i
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Location: Dahlonega, GA
 
Hooked
2013 BV350, 2014 GTS , 2016 GTS, 2013 Downtown 300i, 2018 Like 150i
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Posts: 424
Location: Dahlonega, GA
UTC quote
berto wrote:
The one time I had a burning rubber smell, it was the mud guard sagging and rubbing against the rear tire. If this bike is similar to a GT, it might have a mudguard just behind the airbox. Any rub marks on your rear tire?
Bingo! I'm having this problem and getting no tire rub, but have been smelling burning rubber since my last tire change. I was looking at hoses and wiring harness near the tail pipe, or the bearing in the wheel bracket, but it is the mud guard!

Thanks!
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