variator upgrade Buddy 50

Rich11111 · Post by **Rich11111** » Fri Jun 13, 2014 4:51 am

Got a new Buddy 50 for girlfriend. It's slow to accelerate and low top end.
I plan on derestricting for top end speed but since i will be in the variator i thought i should change to heavier rollers to something like Dr Pulley . I tried to find what others have done to the stock Buddy 50 that has worked but I came up empty. Can anyone direct me to what I should get to make this a better performing setup such as best rollers,do I need a upgraded belt, something else I have not thought of?
It also has high revs to get going so is this a clutch issue or will working on the variator fix this?

Thanks for the help on getting me going in the right direction.

az_slynch · Post by **az_slynch** » Fri Jun 13, 2014 6:55 am

The total package:

http://www.scooterworks.com/ncy--super- ... 5qeiZi3PxA

Out of stock now, but it is comprehensive and does offer greater overall flexibility of the transmission.

The Buddy 50 has a "horizontal Minarelli" type motor, like the Yamaha Jog, 02-11 Zuma and the older Vino. Several Taiwanese and Chinese firms use the design as well. There are tons of parts out there and options for making speed and power.

If you're handy, here's more cheap speed:

http://www.scootertherapy.com/rh50jugpage.html

Here's a speed-up project on this forum:

topic15709.html

Rich11111 · Post by **Rich11111** » Fri Jun 13, 2014 12:11 pm

Exactly what i was wanting. Thanks

TVB · Post by **TVB** » Fri Jun 13, 2014 3:11 pm

I'd suggest starting by just derestricting it, and see what that does for her. It's a two-part procedure, and as I understand it, the part in the transmission puts a cap on the speed, while the part in the exhaust cuts down the power output of the engine. So you may find an improvement in both areas by making those two changes. Also keep in mind that the engine's power will improve a bit as it gets broken in.

Rich11111 · Post by **Rich11111** » Fri Jun 13, 2014 3:41 pm

I was planning on derestricting and upgrading the variator and clutch.

What I have noticed is that the engine has a very high RPM before engaging the clutch. Since I will be in the engine derestricting my thought was to go ahead and change these parts out.

Perhaps in a few years the exhaust can be looked at.

Thanks for your feedback

skully93 · Post by **skully93** » Fri Jun 13, 2014 3:53 pm

You can do a lot with the buddy 50, but what I've found is just doing sliders, and MAYBE the aftermarket stuff on sale. If you end up spending more than $500 on upgrades, you might as well have just bought the 125.

70cc buddy is a fast beast in town, but requires good maintenance, and you lose a lot of the MPG advantage, plus you have smaller wheels, etc.

Rich11111 · Post by **Rich11111** » Fri Jun 13, 2014 4:58 pm

Doing just the roller weights with the derestriction was also in the back of my mind. If I just try the roller weights would Dr Pulley 9 gram slider be the way to go for a stock Buddy 50?

Rich11111 · Post by **Rich11111** » Fri Jun 13, 2014 5:02 pm

i see 10 gram and higher suggested here --> http://www.scooterworks.com/dr--pulley- ... 5suTBagLFg

OldGuy · Post by **OldGuy** » Fri Jun 13, 2014 6:30 pm

I think 6.5 or 7.5 gram rollers are stock. Going higher might help top speed but it will likely kill the bottom end performance. 10 or 11 gram sounds very heavy to me.

Rich11111 · Post by **Rich11111** » Fri Jun 13, 2014 6:41 pm

I have been doing a google search trying to figure the best approach. I found that 4 to 6 gram rollers would be the range needed.
I'm hoping someone will post there experience with the buddy 50 stock roller change which seams the way to go initially.
Since it has a very slow take off and high rev i am thinking 1 gram below stock will be what I try. Just got to find out stock roller weight.
Thanks

Mr Stiffy · Post by **Mr Stiffy** » Fri Jun 13, 2014 6:46 pm

Rich11111 wrote:i see 10 gram and higher suggested here --> http://www.scooterworks.com/dr--pulley- ... 5suTBagLFg

that link is for 15x12 size weights and the performance kit has 16x13 listed for size
and 10g is too heavy...so...

Rich11111 · Post by **Rich11111** » Fri Jun 13, 2014 6:50 pm

i see. In the body of the info they talked about 50 cc which was likely meant to be 150 cc

i see stock rollers are 7.5 or 8.5
http://www.scooterworks.com/blog/roller ... 5tIQhagLFg

az_slynch · Post by **az_slynch** » Fri Jun 13, 2014 8:27 pm

Per the tuning thread I linked, the stock Buddy 50 roller is 16x13 and 7.5gr. They recommend 6.5gr weights.

If you want sliders, try these. Be sure to select 6.5 gr weights from the drop-down menu:

http://www.scooterworks.com/dr--pulley- ... 5tdcItOVdg

If you want rollers, go with these. Be sure to select 6.5 gr weights from the drop-down menu:

http://www.scooterworks.com/prima-rolle ... 5tfeYtOVdg

Rich11111 · Post by **Rich11111** » Fri Jun 13, 2014 8:57 pm

Thanks for pointing me in the right direction. Hopefully I will have them in next week

Rich11111 · Post by **Rich11111** » Wed Jun 18, 2014 3:02 pm

Derestricting at variator and exhaust has given me about 10 mph more (most gain from the exhaust derestriction).

Slow on the take off so I will put in the 6.5 sliders after she has ridden the
Buddy 50 for a week so she can have a good reference.

agrogod · Post by **agrogod** » Thu Jun 19, 2014 4:26 pm

If you are still planning on upgrading the variator use the golden NCY one. Its Teflon coated to keep dust and debris accumulation to a minimum.

http://www.scooterworks.com/ncy-pulley- ... 6MOhPldUwA