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JCosta Pro Variator

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Arturo Pratt

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I'm not sure if this is the correct place for this post, but if not, please move it to where it should be.
After 8 years, I'm going to switch things up in the variator department, and I'm looking at the JCosta Pro.
I've had a Malossi Variator and clutch spring since the first time I changed the belt, and have been happy with it using the racing roller weights, but I've heard great things about the JCosta from a friend in Germany. She said it's the German equivalent of the best thing since sliced bread. I emailed JCosta, and they sent me some dyno graphs that were pretty impressive.

I'm pretty sure I'm going to take the plunge. Here is a link to it, from the same place I get my belts and some other parts. I've used Malossi Kevlar belts for all my belt changes and just about everything else they make for regular maintenance. I think their stuff is on par with the OEM parts, and the prices are like what parts for just about any other scooter cost. They belts are supposed to be made in Japan by the same company that makes the belts for BMW.
For the price, this variator seems like a deal, especially compared to what they get for the stock variator. Coming from Japanese bikes, I still can't believe how much BMW wants for spare parts.


C Sport : Scooterpartsco.com

Scooterpartsco.com : C Sport - Tools Derbi Italjet Genuine Scooter Yamaha E-Ton Honda 2Extreme Performance Piaggio Kymco BMW POLINI Suzuki Special Orders MALOSSI SYM CPI, Keeway & Binelli Tucano Urbano Tomos TGB Aprilia Chinese Scooter Leo Vince Dr Pulley Naraku Bitubo Universal Parts Kawasaki...
scooterpartsco.com scooterpartsco.com
 
Arturo Pratt said:
I'm not sure if this is the correct place for this post, but if not, please move it to where it should be.
After 8 years, I'm going to switch things up in the variator department, and I'm looking at the JCosta Pro.
I've had a Malossi Variator and clutch spring since the first time I changed the belt, and have been happy with it using the racing roller weights, but I've heard great things about the JCosta from a friend in Germany. She said it's the German equivalent of the best thing since sliced bread. I emailed JCosta, and they sent me some dyno graphs that were pretty impressive.

I'm pretty sure I'm going to take the plunge. Here is a link to it, from the same place I get my belts and some other parts. I've used Malossi Kevlar belts for all my belt changes and just about everything else they make for regular maintenance. I think their stuff is on par with the OEM parts, and the prices are like what parts for just about any other scooter cost. They belts are supposed to be made in Japan by the same company that makes the belts for BMW.
For the price, this variator seems like a deal, especially compared to what they get for the stock variator. Coming from Japanese bikes, I still can't believe how much BMW wants for spare parts.


C Sport : Scooterpartsco.com

Scooterpartsco.com : C Sport - Tools Derbi Italjet Genuine Scooter Yamaha E-Ton Honda 2Extreme Performance Piaggio Kymco BMW POLINI Suzuki Special Orders MALOSSI SYM CPI, Keeway & Binelli Tucano Urbano Tomos TGB Aprilia Chinese Scooter Leo Vince Dr Pulley Naraku Bitubo Universal Parts Kawasaki...
scooterpartsco.com scooterpartsco.com
Click to expand...
Hi Arturo, I have the JCosta installed on mine GT… what can i say, pulls really strong specially on the mid range… i did lost top speed and possible will try another solution soon. If you don’t drive faster than 150/160km/h you can get a better solution. Silent and very fast acceleration.
I did made a mistake that cost me a bit of money… so don’t do what i did, make sure you don’t use impact wrench, in my case it came loose and damaged the inner case and bearings, also make sure that the original spacer is installed properly flat surface is for the 34mm nut, also for the JCosta you need to torque the nut to 160Nm instead of the 100Nm from the manufacture recommendation. Additionally clean all the grease from the shaft. Few steps to follow but you will feel a big change for sure.

I have now waiting to install the original variator but with the Dr.Pulley weights 40g instead of the 43g stock, want to improve acceleration without loosing top speed.

As far as i know the best possible setup is Malossi Variator, Dr.Pulley weights (very low weights), we can’t forgot that full weight of the set also counts to increase performance and that’s the reason why the Malossi variator helps to bring the full set weight down. Also the JCosta is very light compared with stock.
 
Noillek said:
Hi Arturo, I have the JCosta installed on mine GT… what can i say, pulls really strong specially on the mid range… i did lost top speed and possible will try another solution soon. If you don’t drive faster than 150/160km/h you can get a better solution. Silent and very fast acceleration.
I did made a mistake that cost me a bit of money… so don’t do what i did, make sure you don’t use impact wrench, in my case it came loose and damaged the inner case and bearings, also make sure that the original spacer is installed properly flat surface is for the 34mm nut, also for the JCosta you need to torque the nut to 160Nm instead of the 100Nm from the manufacture recommendation. Additionally clean all the grease from the shaft. Few steps to follow but you will feel a big change for sure.

I have now waiting to install the original variator but with the Dr.Pulley weights 40g instead of the 43g stock, want to improve acceleration without loosing top speed.

As far as i know the best possible setup is Malossi Variator, Dr.Pulley weights (very low weights), we can’t forgot that full weight of the set also counts to increase performance and that’s the reason why the Malossi variator helps to bring the full set weight down. Also the JCosta is very light compared with stock.
Click to expand...
I’d love to hear your feed back on comparing both set ups 👍
 
Noillek said:
Hi Arturo, I have the JCosta installed on mine GT… what can i say, pulls really strong specially on the mid range… i did lost top speed and possible will try another solution soon. If you don’t drive faster than 150/160km/h you can get a better solution. Silent and very fast acceleration.
I did made a mistake that cost me a bit of money… so don’t do what i did, make sure you don’t use impact wrench, in my case it came loose and damaged the inner case and bearings, also make sure that the original spacer is installed properly flat surface is for the 34mm nut, also for the JCosta you need to torque the nut to 160Nm instead of the 100Nm from the manufacture recommendation. Additionally clean all the grease from the shaft. Few steps to follow but you will feel a big change for sure.

I have now waiting to install the original variator but with the Dr.Pulley weights 40g instead of the 43g stock, want to improve acceleration without loosing top speed.

As far as i know the best possible setup is Malossi Variator, Dr.Pulley weights (very low weights), we can’t forgot that full weight of the set also counts to increase performance and that’s the reason why the Malossi variator helps to bring the full set weight down. Also the JCosta is very light compared with stock.
Click to expand...
Noillek said:
Hi Arturo, I have the JCosta installed on mine GT… what can i say, pulls really strong specially on the mid range… i did lost top speed and possible will try another solution soon. If you don’t drive faster than 150/160km/h you can get a better solution. Silent and very fast acceleration.
I did made a mistake that cost me a bit of money… so don’t do what i did, make sure you don’t use impact wrench, in my case it came loose and damaged the inner case and bearings, also make sure that the original spacer is installed properly flat surface is for the 34mm nut, also for the JCosta you need to torque the nut to 160Nm instead of the 100Nm from the manufacture recommendation. Additionally clean all the grease from the shaft. Few steps to follow but you will feel a big change for sure.

I have now waiting to install the original variator but with the Dr.Pulley weights 40g instead of the 43g stock, want to improve acceleration without loosing top speed.

As far as i know the best possible setup is Malossi Variator, Dr.Pulley weights (very low weights), we can’t forgot that full weight of the set also counts to increase performance and that’s the reason why the Malossi variator helps to bring the full set weight down. Also the JCosta is very light compared with stock.
Click to expand...
Hey Noillek did you check the 40gram Dr.Pulley ?
 
@Bmwgr650gt @DannyCoolBeans @Arturo Pratt
Sorry for being out for a while, after changing to the Jcosta I decided to upgrade to the hydraulic cam tensioner… haven’t ride so much but while doing the upgrade also installed the drpulley 40g and let me tell you that is a good compromise between Jcosta and stock…

Jcosta is like racing machine, Erving high and pulling strong but also decrease on top speed.

drpulley 40g gives a fair increase amount of acceleration maintaining top speed at 180km/h but reaches the rev limiter quick.

I scheduled a ECU tune for March to improve air/fuel is really bad in this model to meet Euro 4 restrictions and hopefully timing and increased rev limiter.

adding a image of a dyno run with Jcosta and Akrapovic exhaust.
951BE4D3-AE07-4B9F-80EE-0EDC478BF674.webp
As expected does the most power were the air/fuel ratio is closer to 13.7, just by smoothing this parameter it should produce more power but also run cooler at normal highway running speed that is my normal commute.

To wrap up, I will stay with drpulley setup for now and probably sell a Jcosta with less than 5hours of use.
 
Just to let you know, got a Malossi over range variator with the dr.pulley and gained a bit more of top speed keeping the acceleration higher than stock, now 173km/h gps is top speed, improving the take off.
Also got the clutch counter spring from malossi and I’m not sure I like it seems there is less engine brake on deceleration, but helps on the take off acceleration as well… still testing this setup and waiting for the ECU flash to see what else can this motorbike give.
 
Bmwgr650gt said:
What's going wrong and the acceleration from 0-50 are so bad ? The tcs ? The program ?
Click to expand...
If you got a 2nd hand, start by servicing the motorbike a replace whatever is too wear out, 2013 model is good for top speed as it has a wider transmission ratio than the 2016, to improve acceleration just get the malossi variator and problem solved
 
Noillek said:
If you got a 2nd hand, start by servicing the motorbike a replace whatever is too wear out, 2013 model is good for top speed as it has a wider transmission ratio than the 2016, to improve acceleration just get the malossi variator and problem solved
Click to expand...
Yea man 2013 model ,I replace the stock variatore with Malossi , 22 gr rollers , white spring and yellows springs on the clutch but nothing happens from 0-50km the same slow acceleration. After 50km the scooter are very fast and top speed 190km gps .What can I do to solve the slow acceleration 0-50km ?
 
Noillek said:
Just to let you know, got a Malossi over range variator with the dr.pulley and gained a bit more of top speed keeping the acceleration higher than stock, now 173km/h gps is top speed, improving the take off.
Also got the clutch counter spring from malossi and I’m not sure I like it seems there is less engine brake on deceleration, but helps on the take off acceleration as well… still testing this setup and waiting for the ECU flash to see what else can this motorbike give.
Click to expand...
It's been several years, but, did you tune the ecu? Ever dyno'ed again?
 
@Putnam hi putman, sold the bike long time ago, I didn't unlock the ECU, the ECU on a gen2 C650GT is more complicated, the best is the gen1 (before 2016), you have more options available and is easier to find a shop to do it. I started to feel too much vibration in the motorbike, everything above 130km/h was exponentially uncomfortable. Despite that the bike is the fastest scooter i have had in stock form. Don't mess with variator so you don't end up like me with huge unbalanced drivetrain that make it very uncomfortable.
 
My C650 has an uncomfortable vibration once it gets to 135 km/h also, but it has fresh original BMW sliders, variator rolls etc. I'm going to replace the rear wheel bearing since it seems not the way how the bike was designed.
 
Ceesie76 said:
My C650 has an uncomfortable vibration once it gets to 135 km/h also, but it has fresh original BMW sliders, variator rolls etc. I'm going to replace the rear wheel bearing since it seems not the way how the bike was designed.
Click to expand...
I did bearings, tire, balancing wheel and other variators even chain tensioner and the vibration kept going worst. I think was in the engine that’s why I could get it right. After bought a Tricity 300, incredible machine safe stable, but very underpowered. Now have a Honda XAdv 2017 and like it allot. Miss BMW top speed, weather protection and comfort but the engine is very nice and economical.
 
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