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Messages - tonyode

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1
Grandvista 250 / Re: 250 Grandvista top speed issue
« on: August 17, 2013, 10:34:58 PM »
Pic of house out of carb.

BTW, I put screws in each end of hose so to be able to identify.

2
Grandvista 250 / Re: 250 Grandvista top speed issue
« on: August 17, 2013, 10:28:45 PM »
Oops, here is pic 1.

3
Grandvista 250 / Re: 250 Grandvista top speed issue
« on: August 17, 2013, 10:11:03 PM »
Ok gentleman, thanks for all the input. I think I have narrowed it down to a possible vacuum issue. I cleaned the carb thoroughly. It doesn't start or run as smooth as it did. Not sure what I did. I didn't take the carb apart, just sprayed the hell out of it with seafoam.

Then I noticed a hose that looks like it had been cut off that comes off the side of the carb, off top. I have posted a pic. When I would plug hoses, I could get the engine to rev up to 8-9K. Much higher RPM than previously.

I also noticed a hose that comes out of what I think is some kind of diaphragm possibly. The hose looks to have been cut off as well. Is there an area I can go to get some kind of schematic for the vacuum hoses?
Here at two pics. Any help would be greatly appreciated.


4
Grandvista 250 / Re: 250 Grandvista top speed issue
« on: August 14, 2013, 10:39:11 PM »
Ok, let me start with that I bought this scooter at an auction so I didn't get to talk to previous owner. The scooter only has 3000K miles on it. It accelerates pretty good, pops up to 40-45 pretty quick. But struggles to hit 50-55mph on my digital speedometer.
On stand, with rear wheel up air, the most RPM I can get is 5-6K.
Things I have done:
1. Replace drive belt
2. new rollers(standard) and variator plate (rollers sit in)
3. Sprayed carb with seafoam.
4. Ran seafoam through gas with new gas.
5. New spark plug.

As I said, it seems to run smooth, no sputtering, cutting out or rough running at all. I am somewhat mechanically inclined and I can't believe there is compression issue based on how it is running. I don't believe oil was low when I got it home.

When I bought it, it was pretty sitting for a pretty good time period. But since then I have ran it pretty good, at least couple tanks of gas thru.

Thoughts?
Carb?
Valves?


5
Grandvista 250 / 250 Grandvista top speed issue
« on: August 13, 2013, 01:05:36 AM »
Hello all. New scooter own here. Bought a used 2009 Grandvista 250. It needed a lil work. But it started right up. To date, I have replaced the belt as well as new rollers and plate. I did this as I could only get my top speed to about 45-50. The scooter accelerates to 40-45 just fine. But doesn't seem to want to go much further. Even after replacing the belt and rollers. I have ran carb clean and can of seafoam through it as well. The engine seems to idle and run smooth. Just am not getting much top end speed out. I have read where it should do at least 70-75.
Any other tips I should try? Any advice would be appreciated!
Thanks!

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