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Old 07-01-2012, 09:14 AM   #61
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Quote:
Originally Posted by Cortez View Post
IF the Michelin City Grip is available in that size, you're not gonna find a
better sport-touring tire for your scoot.
Not available here in a 15" rear tire. I believe that the Sport City 250 is the only scooter or motorcycle that uses a 130/80-15 tire in this country. About the only tire available in that size is a Sava. My dealer claims that even the Maxxis that came on my scooter is hard to get. If I can't find a 130/90-15 tire that lasts I may try a Metzler 880 140/80-15. It's expensive and wider that the stock tire but someone on the Aprilia forum mounted one on his scooter and it did fit.
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Old 07-01-2012, 09:48 AM   #62
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Quote:
Originally Posted by klaviator View Post
Not available here in a 15" rear tire. I believe that the Sport City 250 is the only scooter or motorcycle that uses a 130/80-15 tire in this country. About the only tire available in that size is a Sava. My dealer claims that even the Maxxis that came on my scooter is hard to get. If I can't find a 130/90-15 tire that lasts I may try a Metzler 880 140/80-15. It's expensive and wider that the stock tire but someone on the Aprilia forum mounted one on his scooter and it did fit.
small tires.com has a heidenau k66 in 130/80-15.
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Old 07-01-2012, 09:50 AM   #63
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Sava has a few good ones, but most are horrible.
Unfortunately (for you), the good ones are in the 12-13" range, if
nothing changed recently.

The MC16 is a great all-round tire.
Nothing special in the dry, but it's ok, and for some reason has
almost the same amount of grip in the wet (read: great stuff).

The MC29 Sporty is amazing.
A proper sporty tire like the name suggests, wears out a bit faster
but has amazing grip in the dry. Not so hot in the wet. If that was
available for the Sportcity, you could do a stoppie on it.

I actually rode both of these on different scoots (power and weight)
all year round (read: snow, too).

The MC28 that WILL be available in the 15" is a horror.
Sorry.


The MC20 has that wet pattern thing going on, but from what I've
seen, the MC16 is better in the wet.

Go figure.

They're like that with their car tires, too.
All of their summer tires suck, and all of their winter tires are
above average.


EDIT: Re: scoot tires again. They offered some of their tires in
different compounds, so you could buy the basic MC16 for example,
and MC16 racing medium and racing soft. They all look the same.

100% same profile, huge difference in handling (and price).

THe MC16 medium will stick to the road better then the MC29
Sporty.

Point is.. if ANY of their tires is available in 15" with the 'medium'
sticker, it'll have great grip. Can't say much about the wear, though.

The MC16 never wears out.
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Old 07-01-2012, 10:00 AM   #64
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Quote:
Originally Posted by groo-v-1 View Post
small tires.com has a heidenau k66 in 130/80-15.
Is it any good? I would like to find a rear tire that lasts more than 4,000 miles. All of the tires I have tried worked just fine. The problem is they just don't last.
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Old 07-01-2012, 10:03 AM   #65
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I've even been doing some powerslides on my scoot which has a smaller
rear tire (13"), and the bike is heavier, and after about 5k miles, it's
hard to notice any wear.

It's still riding on stock Kenda tires.
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Old 07-01-2012, 10:03 AM   #66
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Quote:
Originally Posted by Cortez View Post
Sava has a few good ones, but most are horrible.
Unfortunately (for you), the good ones are in the 12-13" range, if
nothing changed recently.

The MC16 is a great all-round tire.
Nothing special in the dry, but it's ok, and for some reason has
almost the same amount of grip in the wet (read: great stuff).

The MC29 Sporty is amazing.
A proper sporty tire like the name suggests, wears out a bit faster
but has amazing grip in the dry. Not so hot in the wet. If that was
available for the Sportcity, you could do a stoppie on it.

I actually rode both of these on different scoots (power and weight)
all year round (read: snow, too).

The MC28 that WILL be available in the 15" is a horror.
Sorry.


The MC20 has that wet pattern thing going on, but from what I've
seen, the MC16 is better in the wet.

Go figure.

They're like that with their car tires, too.
All of their summer tires suck, and all of their winter tires are
above average.


EDIT: Re: scoot tires again. They offered some of their tires in
different compounds, so you could buy the basic MC16 for example,
and MC16 racing medium and racing soft. They all look the same.

100% same profile, huge difference in handling (and price).

THe MC16 medium will stick to the road better then the MC29
Sporty.

Point is.. if ANY of their tires is available in 15" with the 'medium'
sticker, it'll have great grip. Can't say much about the wear, though.

The MC16 never wears out.
After the stock Maxxis front wore out at 8300 miles I replaced it with a Sava. It seems to work just fine. Time will tell how long it lasts. The roads I like to ride in the Smoky mouuntains tend to be very twisty, have excellent traction, but are also very abrasive. Because of this, my tires will usually wear out much faster than those ridden in most other places.
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Old 07-01-2012, 10:06 AM   #67
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Quote:
Originally Posted by klaviator View Post
After the stock Maxxis front wore out at 8300 miles I replaced it with a Sava. It seems to work just fine. Time will tell how long it lasts. The roads I like to ride in the Smoky mouuntains tend to be very twisty, have excellent traction, but are also very abrasive. Because of this, my tires will usually wear out much faster than those ridden in most other places.
And because of that, you can get away with any plastic tire out there, which
is not a bad thing either. You probably got the MC28 Diamond.

We got glass-like road surface around here, nothing has enough grip.
That's why I insist on ABS on my bikes too.
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Old 07-01-2012, 10:32 AM   #68
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Quote:
Originally Posted by klaviator View Post
Is it any good? I would like to find a rear tire that lasts more than 4,000 miles. All of the tires I have tried worked just fine. The problem is they just don't last.
don't know, my rear is 12'' and have'nt replaced yet.
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Old 07-01-2012, 11:18 AM   #69
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Quote:
Originally Posted by Cortez View Post
And because of that, you can get away with any plastic tire out there, which
is not a bad thing either. You probably got the MC28 Diamond.

We got glass-like road surface around here, nothing has enough grip.
That's why I insist on ABS on my bikes too.
yes, I do have a MC28. Luckily, there are plenty of choices in 15" front tires here so if i don't like it I can try something else. The Michelin City Grip is available in the correct size as well as several others.
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Old 08-14-2012, 11:46 AM   #70
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ThiI now have 11,500 miles on my SC250. The first major service is due at 12,500 miles. This includes valve adjustment, belt, roller and sliding block replacement. I consider this a really long interval between valve adjustments of a valve train with screw an lock nut adjusters so I decided to do it a little early.

The Service manual does not cover valve adjustments. The Tech at my Aprilia Dealer has not done one on a SC250 yet. The guys on the Aprilia forum also have not replied when I asked about valve adjustments. I Googled Vespa 250GTS valve adjustments since it's the same motor but didn't find any useful info.

So, I decided to wing it and see what happens.

First, I removed a couple of body panels to access the valve cover.







This was not too difficult. Either was removing the valve cover.



The valve cover had a hose attached which I didn't feel like removing so I just swung the cover to the side.

Next I wanted to remove the Spark plug to make it easier to turn the engine. It's on the right side of the cyclinder (left side of the pic)



Unfortunately, I did not have a long enough extension for my spark plug socket to reach it. A trip to Harbor Freight will be needed.
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Old 08-14-2012, 11:58 AM   #71
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Next, it was time to remove the CVT cover so I could check the belt and also to provide a way to turn the engine by using the Variator. This is supposed to require a special tool but I hate buying special tools that are only good for one thing. A Vespa Mechanic told me the Driven pulley nut, which must be removed to remove the cover, could be removed by holding the rear wheel and using an impact wrench. This nut is only supposed to be torqued to 45 FT-lbs so I figured I could loosen it with a breaker bar.



It didn't work. I couldn't stop the rear tire from spinning. I guess I'll be adding an impact wrench to my shopping list.

Then, once I get these tools, I'll still have to figure out how to determine TDC to check the valves.

I will also inspect the belt. Depending on how it looks, I may replace it or wait awhile. I stopped by the Aprilia dealer last weekend. They had a belt, rollers and sliding blocks in stock.

That's it for now until I pick up the tools I need. If anyone has any suggestions, I'm all ears
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Old 08-14-2012, 12:28 PM   #72
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You can download a Sports City 250 shop manual

http://scootercommunity.com.au/files...l/default.aspx
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Old 08-14-2012, 12:35 PM   #73
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You can download a Sports City 250 shop manual

http://scootercommunity.com.au/files...l/default.aspx
I already have a shop manual. It does not cover valve adjustments At least neither me or the Aprilia Tech could find it in the manual.
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Old 08-14-2012, 12:39 PM   #74
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Doesn't it show how to find top dead center?

I believe valve lash is 0.1mm for the intake and 0.15 for the exhaust.

http://www.gtsownersclub.co.uk/forum...php?f=16&t=257

I was a pretty good mechanic before I got old and feeble
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Old 08-14-2012, 01:10 PM   #75
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Doesn't it show how to find top dead center?

I believe valve lash is 0.1mm for the intake and 0.15 for the exhaust.

http://www.gtsownersclub.co.uk/forum...php?f=16&t=257

I was a pretty good mechanic before I got old and feeble
It does not show TDC. I did find some info on the Vespa Forum including the Valve clearance specs. The info there on finding TDC is not real clear either but I think I'll be able to figure it out. There is supposed to be a mark on the Cam chain sprocket which I should be able to see when I am able to turn the engine.

I am hoping to become a pretty good mechanic before I become old and feeble but I am running out of time
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