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 Post subject: Aero 125 clutch springs
PostPosted: Wed Mar 30, 2016 3:42 pm 
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To prevent spam, enter the year 'modern' scooters were first sold in North America (hint: 1982): 1982
I am looking for a little quicker take off speed and want to change the clutch springs to something stiffer. Has anyone done that? I tried it once a while ago by the springs I got were too long and didn't work so I gave up.


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PostPosted: Wed Mar 30, 2016 4:15 pm 
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To prevent spam, enter the year 'modern' scooters were first sold in North America (hint: 1982): 1982
OK, so I found these springs that are 28mm:

http://www.partsforscooters.com/169-160 ... ch-Springs

Can anyone tell me at what RPMs the stock spring allow the clutch to engage?


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PostPosted: Sat Apr 16, 2016 9:11 pm 
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To prevent spam, enter the year 'modern' scooters were first sold in North America (hint: 1982): 1982
is 28mm the original size of stock?


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PostPosted: Fri Apr 29, 2016 2:38 pm 
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To prevent spam, enter the year 'modern' scooters were first sold in North America (hint: 1982): 1982
guyt29 wrote:
is 28mm the original size of stock?


From my measurements, yes.


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PostPosted: Thu May 26, 2016 10:44 pm 
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To prevent spam, enter the year 'modern' scooters were first sold in North America (hint: 1982): 1982
I have polini blues in mine. Tried each color up to the blues (strongest, highest revving) I wanted to be able to do wheelies from a stop if I wanted haha. No go on the wheelies but I like riding it much more with the blues instead of the stockers. I can't remember what length I got but I called a polini rep somewhere and we eventually figured out a length. I'll look around for the box they came in but if you order them get the yellows or blues. Anything less than that isn't worth the money in my opinion. Feel free to pm me if you have any questions.


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PostPosted: Fri Jun 17, 2016 2:20 pm 
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Rim Kicker
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To prevent spam, enter the year 'modern' scooters were first sold in North America (hint: 1982): 1982
I figured out Yamaha jog springs are 28mm so I ordered a 2000 rpm set off ebay for less than $10 shipped. I've installed them on the nh125 and It revs up a little higher before the clutch grabs. I would guess the the stock nh125 are around 1500 so upgrading to 2000 rpm springs only made a little difference. Maybe I'll try drilling a hole in each clutch shoe to lighten, also going to experiment with upgrading the center contra spring.


Image


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PostPosted: Fri Sep 16, 2016 9:54 am 
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I would love to change the contra spring but wasn't sure what to get. If you find one that works please let me know.


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PostPosted: Sat Oct 15, 2016 2:48 pm 
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Toddlamp wrote:
I would love to change the contra spring but wasn't sure what to get. If you find one that works please let me know.


I actually experimented a little with the contra spring, tried to shim where the spring seats with a large washer to increase tension. I need to get a different size washer to make it work on the nh125 but I ran a shim on my ch80 clutch and it works pretty good.

I've since found a aftermarket spring that fits the ch80 but here's when I had it shimmed with a washer:
CH80:
Image
Image


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PostPosted: Tue Dec 27, 2016 1:30 pm 
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Why did you shim it? What would have happened if you didn't?


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PostPosted: Mon Feb 13, 2017 10:15 pm 
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Toddlamp wrote:
Why did you shim it? What would have happened if you didn't?


The purpose of shimming is to make more spring tension. They sell performance contra springs for other model scooters and they're rated at different spring tensions by rpm: 1k,1.5k,2k. But nothing for a nh125, hence the reason for me trying to shim it.

My next plan is to try to fit a performance clutch off a gy6 150cc onto a nh125.


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PostPosted: Mon Mar 20, 2017 2:57 pm 
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To prevent spam, enter the year 'modern' scooters were first sold in North America (hint: 1982): 1982
Instead of just replacing the clutch springs on the n125 I'm using 150cc Gy6 performance clutch assembly that has 2k clutch springs. My nh125 takes off pretty good with this setup.

Image


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PostPosted: Tue Mar 21, 2017 3:37 pm 
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Nice to know, I was just thinkin of goin that route on the green aero

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'84 Aero 125 in Grabber Green
'84 Aero 125 in Hugger Orange
'84 Aero 125 -current build
'02 Metropolitan
'06 Metropolitan
'02 Metropolitan GY6 swap - build in progress
'06 Stella 2T - daily ride
'08 Buddy 125


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PostPosted: Fri Mar 24, 2017 2:50 pm 
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To prevent spam, enter the year 'modern' scooters were first sold in North America (hint: 1982): 1982
I wanted to upgrade the contra spring on my clutch but of course they no one makes one for the nh125. I figured out a dio spring is the same diameter so I'm going to try this 2k one out. Once I put it together I can feel a difference how much harder it is to spread the clutch pulley with my hands.

Image


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