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Donkey Puncher
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 Post subject: Zuma 125 Daytona belt specs
PostPosted: Sun Jun 14, 2015 7:02 pm 
Ive seen a couple places list the daytona as being 2mm longer
so I figured ive put on a ton of miles with no tranny mods for a long time now
so changing to a different belt I should be able to feel any differences as I have enough seat time I know how my bike should feel like

This is the Daytona belt I got http://japan.webike.net/products/2084985.html $60 shipped

Comes longer then the stock Yamaha belt
using my precise string to measure with I go the outer diameter of both belts, put a mark then measure the difference
I could be a couple mm off because of how thick my marks were but should be close enough
Im not sure where they get 2mm longer from but there is a 2 printed on the box in a couple areas mixed in with Japanese writing

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I read 12mm
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And 1mm Wider then a Yamaha belt

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Can be installed either direction, so not sure if it's wise to flip it over once in a while to get even wear on both sides or it doesn't matter

I know in the past with the older oem belts (the ones with no silver paint on the edge) they would wear on the inside and made it hard to see


So I would assume being longer it may be possible to get better performance once it breaks in
Because being wider will change the position On how deep it sits right now, when it wears it will get narrower and then should be even better as my rpm levels seem to be the same, and feels the same

I havent done any tests yet with my timer I have on my speedo
I will do some soon
Really curious if my 0-30 and 0-60 times will change
I think they will be close to the same, until it wears in

Right now acceleration feels a touch better
and nothing negative to say about it

Once I do the timer tests I will post back




For those that are curious
A while ago I media blasted the variator faces because it was very slick and smooth
and I would get belt slip on acceleration
Since doing that its pretty much stopped that

You can see with the old belt how high up I could get it, but since I dont go top speed that often its harder to see it

Image

Just wanted to show how high up I was on the old belt, I would think this new belt maybe reach all the way at top speed once broken in

I can adjust right now by changing the shim on the variator but im not, its fine how it is and hopefully be a touch better once worn in some

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Donkey Puncher
Donkey Puncher
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 Post subject: Re: Zuma 125 Daytona belt specs
PostPosted: Mon Jun 15, 2015 2:57 pm 
did some timed tests today
0-100kmh since my speedo only shows kmh


This was an old test I did a while ago oem belt
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12.8 seconds


this is the new daytona belt
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13.4 seconds


So since the belt is 1mm thicker I wasnt sure if this would happen. I figured since its longer maybe it would still even out
but I was wrong, you can see the time difference
Not to worry though I found a shim off a vino 125 which measures .92mm
If you calculate the size difference from the oem to the daytona belt thickness you will see the daytona was .98mm wider
so that .92mm shim basically puts me back to where I was with the oem belt when I add that shim to my existing shim


And the nice thing is when the belt does break in, probably couple thousand miles I have the option of taking out that shim
Since I hardly ride this bike it would take me a long time to put that much mileage on it, unless I took alot of top speed road trips



this was after adding a shim on the variator face
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12.5 seconds



So im going to leave it setup like this for a while
after couple oil changes I will check how thick the belt is and go from there


The only other thing left to try out would be an aftermarket TD but ive been happy with how the bike runs for a couple years now
Probably just going to keep it as is its fine for how I ride it

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 Post subject: Re: Zuma 125 Daytona belt specs
PostPosted: Mon Jun 15, 2015 5:24 pm 
I too measured a brand new oem belt vs. the Daytona. My measurements weren't that different in width. Maybe 1mm. And I personally get better performance out of the oem belt for whatever reason. I've always heard the Daytona needs a breakin so I ran it for like 500 miles. I got about 2 mph faster when going back to the oem belt. Not really sure why.

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Donkey Puncher
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 Post subject: Re: Zuma 125 Daytona belt specs
PostPosted: Mon Jun 15, 2015 6:08 pm 
did you mess with the shims to account for the wider belt
if its too wide I dont think it travels up as far as the TD cant open enough
depending on the contra spring probably too
I use a 1000 so it will be stiffer then a stock one




yeah my width was just about 1mm too

but the length was much longer then stock

I heard its supposed to last 4x as long as oem, but my oem has lasted a while already so figured good excuse to try another one


since the tst variator I use is larger then stock, I was hoping a longer belt could maybe give just a little more

but maybe the key is different TD too that possibly opens a touch more also

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 Post subject: Re: Zuma 125 Daytona belt specs
PostPosted: Mon Jun 15, 2015 7:09 pm 
Mike155cc wrote:
did you mess with the shims to account for the wider belt


I've been using the oem shim with both belts. I run the stock contra spring.

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Donkey Puncher
Donkey Puncher
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 Post subject: Re: Zuma 125 Daytona belt specs
PostPosted: Mon Jun 15, 2015 7:30 pm 
okay that may be why you lost speed

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