variator weight modification

[agroculture]

hey folks, figured now is as good a time as any to move from lurker status to actually posting something. i've already used a lot of information i've gathered on here to work on my scooter ('06 a50), and i have to say it runs pretty killer right now.

my problem lies in the 8g dr pulley sliders i am currently using. i feel they may be a bit too heavy. i have great top end (40-45mph flat - 48-50mph downhill gps confirmed), but my uphill climbs are fairly unacceptable (less than 30mph, considering most of the roads i travel on have a 45mph limit).

my question is this... has anyone thought of or had any experience drilling out the brass centers of the weights and using a scale (accurate to 0.1g) to reduce the weight, rather than buy lighter sets? i'am thinking of drilling out 0.1g at a time and testing until i find a better balance of acceleration/top speed.

i'am open to any other suggestions, criticism, whatnot... just trying to squeak out a little more balance without spending any more money at the moment. thanks for any and all help!

[streido]

Yes i tried it 

1st one went ok but 2nd one it seperated the brass from the plastic and that was the end of that idea 

You could probably file them but honestly, just buy some new ones, you can buy cheap sets for tuning/testing till you find the best weight.

Im really surprised you can get up to speed or up any hills on 8.5g weights? Thats 2g over stock for an A50!  A stiffer torque /contra slring in the rear pulley will help but you prob need to tune your rollers to match too, trial and error im afraid.

My 2008 A50 runs 5.1g Malossi rollers in a race variator with a 1500rpm torque spring in the rear pulley, runs 45-48mph flats, usually 30-40mph up hill. You want to try a 1000rpm and go up from there if needed.

[zombie]

"Im really surprised you can get up to speed or up any hills on 8.5g weights? Thats 2g over stock for an A50!  A stiffer torque /contra slring in the rear pulley will help but you prob need to tune your rollers to match too, trial and error im afraid."

That's your cure...

Drilling is a bitch in the rollers. I save all the cores, and swap them as needed. If you add a 1500 contra spring the rollers will work much better. They will appear lighter to the var. I am running Dr P. 7gr sliders, and a 1500 spring. Tops out at 55, and cruises at 50. (50mm bbk on this engine)

[wordslinger]

..i've never been successful at drilling without marring..and the rollers MUST BE EQUAL in weight...


...i suggest you spring for some 5.1 or 5.5 grams and open up a whole new world!!


 


..annd, welcome to the forum!!

[agroculture]

well, here's what happened so far...

i made a jig to hold the sliders in place while i drill them out with a drill press. i used a garden hose with a mist attachment to keep everything nice and cool. seems to work perfectly if i don't try to drill too quickly, otherwise i start to get a little spin. using a 3/8" bit, drilling all the way through provided me with 7.5g. i've only completed one so far, and will be finishing up as soon as i get rid of this heartburn! i'll try to nab some pics and post them up, showing the progress. can't wait to get back on the road!

[zombie]

It's way cool making sh** work...

[streido]

It's way cool making sh** work...

That how we 50cc guys roll 

[zombie]

That how we 50cc guys roll

[agroculture]

well, sorry guys, no pics. my camera's dead. 

however, this was my result...

with all weights drilled out to 7.5g/ea, my acceleration has improved somewhat mildly. going up hills that would normally be around 25-28mph are now handled between 30-32mph. still, not what i'am looking for. i borrowed a set of 6.5g weights from a buddy with a ruckus and wow! accel improved drastically, and i'am fairly certain i may have gained a mile or two at the top. guess i need to go lighter after all. now where did i put that money?...

i suppose i'am going to hold out for a malossi or dr pulley var. i know everyone seems to rave about the multivar. any opinions about the dr pulley var in contrast?

[zombie]

If you like 6-6.5 for rollers then using Dr Pulley in the same var will need 1gr heavier to have the same wot rpm. I haven't run anything with a Dr P. var. 2t but I rode a friends 250 people with one that All About Scooters installed. It stayed reved for ever on de accell. Almost too much rpm for too long... But it ran up gear real fast. I think heavier rollers, and a stiffer contra would be a great set up. It's a little more "weight" on the engine, and parts wear faster but the trade off is worth it if you don't mind the maintenance. Dr. Pulley is as good as any other name brand. I prefer other brands at the same price point because you can get "factory race" parts for the price of Dr P.. You can get an entire stage 6/malossi/polini cvt set for the price of a Dr P Var.
 I've ridden my ZX 2 hrs in the past 3 weeks. Had a hard time priming it too. It keeps my maintenance real low by not riding it.

[wordslinger]

..i thot about the dr p...but i just hate buying that cool-ass drive face that comes with it...

..and not using it...dont like having to kick every time to start...

[zombie]

My starter on the gy6 is dying, and I have no kick lever on it. I think I'll do that today.

[wordslinger]

..they hard on starters...i put one on fromma ppl...

..the 2t starters turn up quicker..

..aint that weird??