CVT Upgrade

[streido]

Bummer. You would think someone in Oz would realise the demand for parts there and open up a business you dont need to order from abroad. Even here theres not that many places doing tuning parts which is odd cos we got lots of scooters here. I ordere fly springs set yesterday so if I get a chance before my hols I might get mine in before you do cos im fitting the 2000 torque spring at the same time I do the flys, next weekend with any luck.

[sidthesloth]

I've yet to try the 2,000 torque spring, but you will love the fly springs. I could probably find them in Aus. but at a massive mark up.

[thebatman]

I'd sortof like to try one also, just to get that "launch" like the s9 has... That'll probably get the wheel up quickly....

[sidthesloth]

When I got home from work this morning I changed the weights back to the 8 gram, the 6s were just a bit too screaming for me, though the take off was better, it was not arm ripping. I have also installed the 732 belt as the kcx-9000 doesn't seem to be going to the top of the variator. After installing the belt I got a ruler and measured the distance from the outer edge of the belt to the outer edga of the rear pulley, 8mm. To me, that seems like a lot of unused pulley and loss of low down gearing. I was thinking that a longer belt would run over the top of the variator and bind on the casing, but, once the variator is fully closed the belt shouldn't run any higher. So thinking of a 748 belt. . The next drawback I see with this is that with the variator fully closed, the belt may not pull to the bottom of the rear pulley, causing loss of top speed, always a compromise.
I have just ordered the three torque spring set from Scooter Assassins and a trail tech tacho.

[sidthesloth]

Torque springs turned up today, put in the 1,500 and took it for a small ride, it seems to go up through the range smoothly, no obvious shift points, but I don't think I am in my power band. Will see how it goes this arvo going to work.

[streido]

Was that using the 8g weights sid? I plan trying a 1500 in mine this weekend with 7.5g rollers.

[sidthesloth]

Yep, 8 gram sliders, you should be ok with 7.5. On my way to work I found that it does still have an initial shift of sorts just after take off. Might be due to the belt size, 732x18.5

[sidthesloth]

G'day All, just a small update, on Tuesday night after work I had a mongrel time trying to start the scooter, kickstart was jamming, (battery was not strong enough to start it). On wednesday, I opened the cvt and cleaned out the dust from the kickstart mechanism, this time I have tried a little light machine oil for lubing the kickstart gear shaft, (which seems to be good so far). While I was there I found some small balls in the case which I suspected to be the ramp plate slide bushes. Sure enough, they were gone, nothing left at all this time. So, after putting in the last set I had I went and ordered more from Scooter Assassins, then replaced the 1,500 torque spring with the 2,000 just to see what it is like, I thought the 8 gram sliders were a touch too heavy so this should work quite well. Since I had the clutch apart I decided to install the new clutch I got from Scooter Assassins a couple of months ago. I fitted the 2,000 fly springs that came with the clutch and put it all together. When going to work I found that the stall speed was much higher than with the older fly springs, which were also 2,000 rated. Well, by the time I got to work, 8 kilometres, there were some problems, clutch was staying engaged. I thought the springs might be broken. Thursday I stripped it again to find the springs were not broken, but one of the clutch arms was broken and the spring from that was grinding between the clutch bell and cvt cover. I will try to put up a pic of the clutch if I can. I have emailed Scooter Assassins, but am yet to hear back from them.

[sidthesloth]

OK, try to post a pic of the clutch.

[sidthesloth]

In the above pic. the spring that is alongside the clutch is ground considerably on the other side. all those pieces went through my cvt and has pitted the torque driver, had to strip it again to clean out all the bit of metal.
After all that, I am running the 732 belt with the 8 gram Dr. Pulley sliders and 2,000 torque spring ( am back to using my old clutch and fly springs) and the performance is reasonably good on the first half throttle, but I think I am due a new air filter which will help.
Did i ever mention that these scoots are frustrating?

[thebatman]

Hey sid, good to see you about my friend...
Yep, you did mention they were frustrating.. I TOTALLY AGREE.
These scoots are driving me mad i tell you.
I got a good one for you in my thread, if you want to talk about frustrating!!  . gonna update in a few minutes with a pics....

[sidthesloth]

I haven't seen the pics yet but, man that sucks, mine pales into insignificance.

[sidthesloth]

Have been tinkering again, I have gone back to the stock OKO settings of 45 pilot jet and 107 main jet, reason being that it is hard to start when cold and running too lean in mid range, can't raise needle from bottom, with these jets, I now have the needle up to 1 notch from highest setting.
With the 2,000 torque spring, 2,000 fly springs, (which are due for replacement), I have tried doing something that I don't really agree with, I have taken out 3x8 gram sliders and put in 3x6 gram sliders. Without weighing them, that should be equivalent to 7 gram sliders. Take off is much better, to the point of considerable lightness on the front wheel, top speed has suffered a little. In the pic below, the needle is a little short of where it has been the last couple of days, it was going to the arrow.