OP
@vintage_red_matthew avatar
UTC

MV Santa
GTS250, 1975 VBC, 1980 P200E cutdown
Joined: UTC
Posts: 4867
Location: Sedgwick, Kansas
 
MV Santa
@vintage_red_matthew avatar
GTS250, 1975 VBC, 1980 P200E cutdown
Joined: UTC
Posts: 4867
Location: Sedgwick, Kansas
UTC quote
It reads full whenever the key is on. It was intermittent for a while but now it's all the time. Luckily the low fuel light still works.

I suppose the first thing I'll try is to open up the headset and wiggle the electrical connection.

I've already changed the instrument cluster once because of a bad speedometer and I still have it so I can plug that one in and see if that works.

Parts are getting harder to find. eBay has a cluster for $230. Ouch. You can't just swap the fuel gauge. It's all encased in plastic and glued together.

If it's not in or around the cluster I'll have to look at the sending unit. Does anyone know if it's as hard to change a sending unit/fuel pump on a GT as it is on a GTS?

In the mean time I'm watching for that low fuel light and carrying an extra gallon of gas. If it had a trip odometer I could use that but it doesn't. I think I'm going to get a dry erase marker and write down the mileage on the headset when I fill up. I can imagine complications with that.

Any other ideas? Has anyone else had this problem?

Thanks.
@motovista avatar
UTC

Veni, Vidi, Posti
GT 200
Joined: UTC
Posts: 9255
Location: Main Street, Watts
 
Veni, Vidi, Posti
@motovista avatar
GT 200
Joined: UTC
Posts: 9255
Location: Main Street, Watts
UTC quote
vintage red matthew wrote:
If it's not in or around the cluster I'll have to look at the sending unit. Does anyone know if it's as hard to change a sending unit/fuel pump on a GT as it is on a GTS?

Any other ideas? Has anyone else had this problem?

Thanks.
Of course it is. My experience like this turned out to be because of the sender. Something to keep in mind with the GT 200 is that the sending unit is not the same diameter as the one on the GTS. When Piaggio discontinued the first sending unit for the GT, they cross referenced it to one for the GTS. That is incorrect. The correct part for the GT is CM086809
OP
@vintage_red_matthew avatar
UTC

MV Santa
GTS250, 1975 VBC, 1980 P200E cutdown
Joined: UTC
Posts: 4867
Location: Sedgwick, Kansas
 
MV Santa
@vintage_red_matthew avatar
GTS250, 1975 VBC, 1980 P200E cutdown
Joined: UTC
Posts: 4867
Location: Sedgwick, Kansas
UTC quote
Motovista wrote:
Of course it is. My experience like this turned out to be because of the sender. Something to keep in mind with the GT 200 is that the sending unit is not the same diameter as the one on the GTS. When Piaggio discontinued the first sending unit for the GT, they cross referenced it to one for the GTS. That is incorrect. The correct part for the GT is CM086809
To be clear, are are saying that you think it is the sending unit?

I haven't checked yet but is that a part that is hard to get and/or install?

Thanks for your help.

Edit: I will source a new sending unit.

Thanks again.
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