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UTC

Enthusiast
2023 Vespa GTS 300
Joined: UTC
Posts: 78
Location: Houston, Texas
 
Enthusiast
2023 Vespa GTS 300
Joined: UTC
Posts: 78
Location: Houston, Texas
UTC quote
Does anyone know what is the normal life expectancy of a water pump on a GTS 300? I heard one statement it was 25,000 miles as they are a wear item. Most people don't put a lot of miles on their scooters so there is not much (if any) talk about replacing water pumps.
@nightwing avatar
UTC

Contributor
2007 LX 150 (memories)
Joined: UTC
Posts: 8575
Location: New Hampshire
 
Contributor
@nightwing avatar
2007 LX 150 (memories)
Joined: UTC
Posts: 8575
Location: New Hampshire
UTC quote
I can't give a definitive answer but I would think following Vespa's schedule for coolant flush and refill with the correct coolant would be advisable for the longest water pump life.
UTC

Ossessionato
2016 Vespa GTS300ie abs/asr/ess Settantesimo '70'
Joined: UTC
Posts: 3766
Location: East Anglia, UK
 
Ossessionato
2016 Vespa GTS300ie abs/asr/ess Settantesimo '70'
Joined: UTC
Posts: 3766
Location: East Anglia, UK
UTC quote
As Nightwing says, if the coolant is changed regularly, on time, using the correct product, the pump will last quite some time. I've changed out a pump on the GTS300 at 35,000 miles and another at 45,000 miles. Both pumps were the originals. If you neglect the coolant changes expect the pumps to go out to lunch earlier. The coolant is vital for lubricating the seals in the pump, and old coolant can't do that so they fail early.

The other thing I noticed is that the pumps fail earlier on bikes used for high speed running on highways (our motorways and dual carriageways) for mile after miles for much of it's life. It's like anything else in life, if you stress it a lot, it won't last as long!

The good news is that the water pump replacement job is easy to do by a good diy'er with a bit of research first, although the complete pump is a bit pricey!
@breaknwind avatar
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Ossessionato
Red Devil SH150i (11,000)
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Posts: 3280
Location: Orange Park Florida
 
Ossessionato
@breaknwind avatar
Red Devil SH150i (11,000)
Joined: UTC
Posts: 3280
Location: Orange Park Florida
UTC quote
Don't forget about oil. The water pump on my bikes have a seal holding back coolant and another seal holding back engine oil. Dirty/acidic oil can foul a seal. Stromrider has pointed out many times before, if you only ride short distances, change your oil more often.
UTC

Ossessionato
2016 Vespa GTS300ie abs/asr/ess Settantesimo '70'
Joined: UTC
Posts: 3766
Location: East Anglia, UK
 
Ossessionato
2016 Vespa GTS300ie abs/asr/ess Settantesimo '70'
Joined: UTC
Posts: 3766
Location: East Anglia, UK
UTC quote
Good point breaknwind, and of course you are right!
@dooglas avatar
UTC

Veni, Vidi, Posti
GTS 300ABS, Buddy 125, Buddy Kick 125
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Posts: 13462
Location: Oregon City, OR
 
Veni, Vidi, Posti
@dooglas avatar
GTS 300ABS, Buddy 125, Buddy Kick 125
Joined: UTC
Posts: 13462
Location: Oregon City, OR
UTC quote
breaknwind wrote:
Don't forget about oil. The water pump on my bikes have a seal holding back coolant and another seal holding back engine oil. Dirty/acidic oil can foul a seal. Stromrider has pointed out many times before, if you only ride short distances, change your oil more often.
Or to make a similar point - even if you don't put 6K miles a year on your scooter, it deserves an oil change at least once a year. That would be at least an oil change annually and a coolant change (as well as brake fluid flush) every two years - there are a lot of scooters out there not getting the needed servicing.
@fledermaus avatar
UTC

Veni, Vidi, Posti
2007 LX150 2015 GTS (on the bench) 2017 BV 350
Joined: UTC
Posts: 12250
Location: Fond du Lac, Wisconsin
 
Veni, Vidi, Posti
@fledermaus avatar
2007 LX150 2015 GTS (on the bench) 2017 BV 350
Joined: UTC
Posts: 12250
Location: Fond du Lac, Wisconsin
UTC quote
I think I'm an outlier....my pump failed before 50K, and I'd been religious with fluids. But, as always, YMMV, literally.
UTC

Ossessionato
2016 Vespa GTS300ie abs/asr/ess Settantesimo '70'
Joined: UTC
Posts: 3766
Location: East Anglia, UK
 
Ossessionato
2016 Vespa GTS300ie abs/asr/ess Settantesimo '70'
Joined: UTC
Posts: 3766
Location: East Anglia, UK
UTC quote
Is that just before 50,000 miles? If so, that's not bad at all for the GTS and is about the expected time depending on the bikes maintenance and use. At the end of the day, it's a hard working component.
@greasy125 avatar
UTC

Sergeant at Arms
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: UTC
Posts: 14995
Location: The state of insanity, SoCal
 
Sergeant at Arms
@greasy125 avatar
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: UTC
Posts: 14995
Location: The state of insanity, SoCal
UTC quote
*shakes magic 8-ball*

-It is certain.
-It is decidedly so.
-Without a doubt.
-Yes, definitely.
-You may rely on it.
-As I see it, yes.
-Most likely.
-Outlook good.

done 'em at 20K done 'em at 50K and done 'em at 75K

flush and fill every two years. cross your fingers, turn around twice in counter clock-wise direction while chanting, i dunno, something in italian. then light a candle and cook some bacon. and if it's the morning? make some pancakes too.
@fritz_katzenjammer avatar
UTC

Addicted
'07 GTS250ie "Mechanical Squirrel", '66 Honda Benly, '19 Suzuki 250 cafe "Mouse", '42 Henschel PzKw VI Tiger
Joined: UTC
Posts: 900
Location: somewhere deep in the back of the garage...Burlington ONT.
 
Addicted
@fritz_katzenjammer avatar
'07 GTS250ie "Mechanical Squirrel", '66 Honda Benly, '19 Suzuki 250 cafe "Mouse", '42 Henschel PzKw VI Tiger
Joined: UTC
Posts: 900
Location: somewhere deep in the back of the garage...Burlington ONT.
UTC quote
greasy125 wrote:
*shakes magic 8-ball*

-It is certain.
-It is decidedly so.
-Without a doubt.
-Yes, definitely.
-You may rely on it.
-As I see it, yes.
-Most likely.
-Outlook good.

done 'em at 20K done 'em at 50K and done 'em at 75K

flush and fill every two years. cross your fingers, turn around twice in counter clock-wise direction while chanting, i dunno, something in italian. then light a candle and cook some bacon. and if it's the morning? make some pancakes too.
I've found waving a dead cat over the offending component often helps as well, best done on a Tuesday....
@greasy125 avatar
UTC

Sergeant at Arms
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: UTC
Posts: 14995
Location: The state of insanity, SoCal
 
Sergeant at Arms
@greasy125 avatar
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: UTC
Posts: 14995
Location: The state of insanity, SoCal
UTC quote
Fritz Katzenjammer wrote:
I've found waving a dead cat over the offending component often helps as well, best done on a Tuesday....
Dead birds or squirrels only.

The gatitos are praised for their service, and mounted or returned to the earth- marked with medals for their dutiful work.

Oh, and no crows. Because crows are good bird friends.
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