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Author Topic: Anyone change BV250 rollers and/or spring?  (Read 5645 times)
Yellow Jacket
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« on: October 17, 2010, 04:57:50 AM »

I'm wanting to improve off line performance and will probably do both, just one at a time. Anyone done either/or and was there any improvment? Who did you go with for rollers? What is the stock roller weight?
I just ran my BV at a local drag strip and the 0-60' times were slower than my old Honda 150 Elite. I'm looking at rollers but don't know which brand to go with. Thanks in advance for any help. 
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johnp
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« Reply #1 on: October 17, 2010, 05:33:02 AM »

You would need to change the clutch and rollers and there are a few performance ones out there. The best is the Jcosta which most people go for.
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msgtphil
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« Reply #2 on: October 18, 2010, 03:04:04 PM »

My 2 cents, 'Works good, costs alot of money, don't mess with it.' Though many report good results, 99% of the CVT problems I have read about were with aftermarket parts. The one variable that I don't have is how many of those could be attributed to improper installation.
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« Reply #3 on: October 19, 2010, 06:00:53 AM »

You might consider trying the K-Mod type of modification. It involves pulling out a couple weights. I did it on 2 Reflex scoots and it helped the 0-60 quite a bit. I suspect it would work as well on your scoot.   
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TechGuy
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« Reply #4 on: October 19, 2010, 09:19:12 PM »

The only mod I would do would be to change the rollers to sliders.  I have had good success in my scoot.  No major changes to  the operation, no risk of belt rubbing.  It removes the lull in the middle of the power band and gave me a few extra MPH.  It may have lowered my MPG a little. 

In some instance, the slider weights may not be exactly the same as OEM. Some people move up a gram, some move down a gram in the total weight. Down is faster off the line with a potential lower top speed and potential better MPG.  Up may be slightly slower off the line, higher top speed and lower MPG.  There is also the potential that the same weight will give you slightly better off the line, no lull and about the same MPG and top speed. This is my guess at when the manufacturer, Union Materials,  is aiming at in their suggested weight. Some of the differences are very minor and not noticeable without a stop watch.

http://tinyurl.com/286tflt
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Yellow Jacket
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« Reply #5 on: October 20, 2010, 06:02:58 AM »

I've still had no luck finding out what the stock roller weight is, even Scooter Trap could not tell me. Dr Pulley seems to have only 1 or 2 differant weight sliders and I'm not sure if they are compatable with stock variator.
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TechGuy
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« Reply #6 on: October 25, 2010, 10:39:57 PM »

According the link above (the one I posted) DR Pulley is recommending the sliders with a 20.9 diameter 17 length and 11 gram weight. The catalog shows the BV listed by it's European name "Beverley 250"

They are often sold as an SR2117 11g

There is a conversation at Modern Vespa about these sliders in a Vespa 250 which is the same engine and CVT as the BV. What it got from all the comment is tha the 2217/11g sliders are a good fit for the 250cc engine/CVT and they are hard to find in the US.  You can order then directly from DR Pulley at unionltd@ms14.hinet.net

http://www.modernvespa.com/forum/topic59656?postdays=0&postorder=asc&start=40#844739
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Yellow Jacket
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« Reply #7 on: October 30, 2010, 05:55:46 AM »

OK, light rollers and clutch spring are in hand, now I just need the time to install them. The bike has already been to the drag strip w/all stock stuff so I have a baseline. If possable, I'll change just the rollers or the spring, go to the track and make some passes, then install the other and make a few more passes. It's been my experiance that there is so much BS out there when it comes to performance claims that I want to know exactly how much difference each component will have of performance.  Stay tuned, as soon as I have something to report I'll let you know.
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Yellow Jacket
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« Reply #8 on: November 12, 2011, 04:46:57 AM »

   Guess what, I finally got back to this. I've had some medical issues this summer that kept me away. I installed both the roller and clutch spring at the same time. Turns out this is more of a job than most would be able to do at home. The rollers wouldn't be much harder than changing a belt but the spring is much more of a job.
   Here are the before and after numbers:

                                   1/8mile ET      speed        60' ET

              stock              12.344          54.232         2.856

        w/ rollers              11.808          56.538         2.737
        &  spring

   For me, the results were worth the time and $'s. There is a noticable improvement in off line takeoff, exactly what I wanted. I don't know how much of the gain in performance can be attributed to the individual components, probably near 50/50 for each.
   Now that the BV300 is available I'm thinking real hard about getting one and if I do, I'll doing the same to it.
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« Reply #9 on: November 13, 2011, 06:32:44 PM »

   Guess what, I finally got back to this. I've had some medical issues this summer that kept me away. I installed both the roller and clutch spring at the same time. Turns out this is more of a job than most would be able to do at home. The rollers wouldn't be much harder than changing a belt but the spring is much more of a job.
   Here are the before and after numbers:

                                   1/8mile ET      speed        60' ET

              stock              12.344          54.232         2.856

        w/ rollers              11.808          56.538         2.737
        &  spring

   For me, the results were worth the time and $'s. There is a noticable improvement in off line takeoff, exactly what I wanted. I don't know how much of the gain in performance can be attributed to the individual components, probably near 50/50 for each.
   Now that the BV300 is available I'm thinking real hard about getting one and if I do, I'll doing the same to it.

In the spring the bv350 will be available. 33HP! Might not need to do anything to that scoot!

Bob
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Yellow Jacket
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« Reply #10 on: November 14, 2011, 02:25:17 AM »

Where can I get some info on the BV350?
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bvBob
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« Reply #11 on: November 15, 2011, 10:32:33 PM »

Where can I get some info on the BV350?


Here's some:http://www.cycleworld.com/2011/11/03/2012-piaggio-beverly-sport-touring-first-ride/

Over on Modernvespa there is are a couple of threads on the bv350. There are a bunch of videos on Youtube also. It looks like a real winner. The U.S. won't get the ABS and traction control though. I'm OK with that if it helps keep the price down. They are supposed to be here the first quarter of 2012. If they make it, and the price is reasonable, I'm going to sell my MINT Honda Reflex and get one.

Bob
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Yellow Jacket
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« Reply #12 on: November 16, 2011, 02:40:57 AM »

Just when I decide to get the BV300 this comes along to muddy the waters. I did google bv350 and found some stuff on it. So are there 2 versions of the 300, one old and one new? And I'm all for the non ABS and traction control.
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bvBob
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« Reply #13 on: November 17, 2011, 12:40:52 AM »

Just when I decide to get the BV300 this comes along to muddy the waters. I did google bv350 and found some stuff on it. So are there 2 versions of the 300, one old and one new? And I'm all for the non ABS and traction control.

Yeah it kinda looks like we are going to get the BV350 ST (sport touring). I wonder if we are also going to get a 350 touring? If Piaggio wants to save some cash but give us a couple of options my opinion would be to only bring the the BV350 to the U.S. but in two versions, one being the BV350 ST with the blacked out wheels and mirrors etc. and a BV350 touring with the chromed mirrors and the silver 22 spoke wheels. One for sporty minded folks and one for luxury minded folks. That way they would essentially only have to bring in one "BV" but in two versions. This would save them some money by not bringing in the 500. Just something to think about. I can't wait to see what we get. I hope it's not the silver ST with the red seat- that may sell in Europe but it won't here. I think we are more traditional in the U.S. in regards to the looks of our bikes. Look at Harleys- they have looked about the same -give or take- for the last 50 years... and those sell!

Bob
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« Reply #14 on: November 17, 2011, 05:02:16 AM »

Interesting you should mention the BV500, or lack of same. I started a thread a while back when it was on Piaggio's web page and I REALLY liked it. Now it's not even there, only the 460-500. I had decided to sell a couple bikes in the spring and pop for the 300, but now I have to know more about the 350. My riding style could be called "sporting" and I'm thinking that 350 would be right for me. Don't know what to believe when it comes to Piaggio USA, have to see it first.
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Trancebear
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« Reply #15 on: December 21, 2011, 02:28:14 AM »

   Guess what, I finally got back to this. I've had some medical issues this summer that kept me away. I installed both the roller and clutch spring at the same time.

Where did you order your 21x17 rollers? It seems I was told my Hyosung scooter took 23x18 rollers but I took mine out and measured them and they are the hard to find 21x17. I need to go down from 13g stock to around 10g due to my weight.
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Yellow Jacket
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« Reply #16 on: December 22, 2011, 05:09:06 AM »

The rollers I used are Molossi, came from Scooter Trap, but I think they are no longer in business. Have you looked at your rollers? The rollers are a composite material with an aluminum inner part. I don't see why one couldn't take a set of stock rollers and just open up the hole in the middle. That's what I will do the next time. Be sure you note which way the rollers are in, there is a right and wrong way for them to go.
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