What Lighter Rollers For Better Hilly Climbing Ability

[u33db]

Hi,

My commute on my 125 is over quite a hilly route and I find the acceleration uphill isn't quite as brisk as i think it could be - it "bogs" a little on very steep hills until it drags itself into its powerband and starts to accelerate.

So i'm looking to change to some lighter rollers.

Can anyone tell me what the standard roller weight/size is and what'd be a good weight to use to allow the engine to rev a bit higher to help with hill climbing?

I don't want anything too extreme where its running at max rpm even before the variator locks up and using lots of fuel, just a bit more grunt than what it has.

Thanks in advance.

[Mel46]

I put 13 gram rollers in mine and they help it get up to speed in a hurry, though the top end is about the same.

[chicaboo]

Standard roller weights on your scooter should be 15g. I've tried 11g and 13g sliders on my 150.
11g sliders require more wrist action but are very sporty and use a bit more fuel.
13g sliders are a good compromise and won't adversely affect your fuel economy.
Because you're on a 125 you might find 12g closer to what you want?

[homie]

Never used lighter rollers in a stock assembly... might be fun. Do a bench run (video if possible) for comparison, before-after kind of thing.

[chicaboo]

Never used lighter rollers in a stock assembly... might be fun. Do a bench run (video if possible) for comparison, before-after kind of thing.

My stock variator is geared to 81mph with 13g sliders, but only 75mph with 11g sliders. With an aftermarket variator it's around 95mph on the stand.
Regardless, with stock engine I've never been able to exceed 75mph with any configuration. But that will change soon.

[u33db]

Thank you - i have ordered some Malossi 12.5g rollers so we'll see how it performs with those

[buddy1976]

New contra spring as well as the rollers would help better on hills

[u33db]

Rollers arrived today so will be fitting them on Saturday.

Went with 12.5g;


Part numbers for other weights for reference;

[Mel46]

Regardless, when you get done let us know what the results are. Maybe I will put a sidecar on my PCX and climb a hill...like this one.

Sidecar up a hill.jpg (127.9 KiB) Viewed 3395 times

[zanggerk]

I just changed the stock rollers to 12.5 g sliders and see some improvemnt when going uphill. It accelerates faster and the speed I can reach uphill is also more.
The top speed increased by about 5 kph.

[u33db]

Fitted mine today and agree with the above;

It is faster uphills and accelerating (not quite a fireblade but still!), also flat out on level ground I saw an indicated 62-65 which is the most I've seen yet.

The only thing I don't like is it seems a good bit louder due to more rpm (or maybe just a different tone i'm not used to when cruising)...i will check my exhaust bolts are tight tomorrow just in case but not much I can do about that I guess. Will need to see how mpg works out this week too.

Also I see Malossi do a multvar 2000 for this bike - has anyone tried this or another upgraded variator with any real benefit?