. By rosiemoto (Read 11,518 times)

[rosiemoto]

Mar 28, 2016 20:13:27 GMT -6 Alleyoop said:

Longer belt may get you a few more mph by climbing higher on the variator.

Don't know if it is due to the variator or not unless you can post pictures on how the belt is sitting using both variators.

That would be cool because I've still got a decent amount of clean untouched area at the edge of my variator, even after upgrading the fan pulley size. More mph is welcome! I just hit 60.5mph indicated today with what's in there right now..ALMOST matched my old speed record, BUT I was totally going with the wind so it doesn't count.

I'll make a video of the CVT tomorrow (if weather is nice) so you can see how it's all working at idle. If you like, it wouldn't be any trouble for me to swap to the stock variator just to see if that does change it. Actually I'll do that too then, and make it all into a quick video!

[Alleyoop]

Very cool Rosie, that would tell if it is the Variator causing the difference in the way the belt fits in the rear pulley. After you swap the variators start the scoot so the belt falls into it's proper place in the pulleys.
If the belt falls about the same with both variators down quite a bit then I would try a 845 belt.
Alleyoop

[rosiemoto]

It seems the belt stays down in the clutch regardless of Koso or stock variator, but the belt may be slightly closer to the edge with the stock variator... not sure though! Here's the video of it all. What do you think?

www.dropbox.com/s/5mllb0wmsowhw2w/belt%20too%20short%20maybe.mp4?dl=0

Now that I've got the whole thing back to stock, I'm curious how it'll ride and if I'll feel the difference right away, since I've been using the Koso variator for months now.

[Alleyoop]

Yes, with the stock it is a little closer to the edge not by much but it is.

NOW what you want to do is MARK the STOCK VARIATOR to see how high it is climbing on the STOCK one.

Then if and when you switch back to the 115mm Variator Mark that one and see how high the belt is climbing on that one.

Alleyoop

[rosiemoto]

I was out for the "stock test ride" while you posted that. At first I wasn't sure I could tell a difference, but I was letting the bike warm up before going faster. When I got above 40mph it just climbed RPMs really fast, and that was an "OKAY, YEP" moment. Koso starts climbing after 50 or so. But you're right, I could feel with the stock setup it's not stuck in 2nd gear AS BAD... maybe 1st-and-a-half gear.

STOCK (13g rollers, 108mm variator): 50mph @ 6.7k rpm; TOP SPEED 56mph @ 7.2k rpm
KOSO (12g Dr P sliders, 115mm vari): 50mph @ 6.1k rpm; TOP SPEED 60mph @ 7k rpm

Do you still think I need the longer belt after seeing it in video? With stock variator it doesn't seem to be a problem, maybe it'd sort itself out like cyborg said. But with Koso variator maybe I do need the 845? What are your thoughts? I'll go mark it now and ride it again before I put the Koso back in.

[Alleyoop]

It will take the 845 with either variator and will raise the belt in the rear pulley about 1/16 to 1/8 of an inch. If the belt goes up that much in the VARIATOR you should see a couple more miles per hour on your top end speed. But that would be up to you if it is worth the cost of another belt for a couple miles per hour.
Alleyoop

[rosiemoto]

That's cool, and here's the marking on stock variator after a ride WOT to top speed. Will have a picture of Koso marking next time I get around opening it up.

By the way I can't seem to find any 845-20-30 belts on eBay...?

[Alleyoop]

Yea not a very popular size but I found even better an 846 20 30 belt
www.partsforscooters.com/106-70-Gates-Powerlink-Belt?sc=34&category=132699

www.racingplanetusa.com/drive-belt-gates-powerlink-standard-p-163072-1.html#.Vvr36kfS5fA

Google for the cheapest price.

[rosiemoto]

Dang...Gates only huh? I'm afraid to touch Gates belts again after what happened with their last 2 belts I used. Belt dust everywhere, stretched out within a week... not a fan.

[Alleyoop]

I don't know if only gates makes that size I just found them I found only one 845 but you had to oarder from the uk.

[rosiemoto]

I can't really find anything either. I can just deal with what I've got; this $9 chinese belt seems to be doing perfectly fine other than it not going to the top of the clutch.

Just sanded my 6 year old clutch's pads too, maybe that'll help with the low rpm roughness, because they were super glazed. I don't have the right tool for opening up the clutch yet, so can't swap out the old springs to the new clutch. Oh, the clutch springs on the inside are nice and yellow rusty by the way, can I shoot a little WD-40 in there at them? Might even change how the clutch acts I wonder.

[Alleyoop]

Sure shoot some WD to clean them off just so it does not get on the pads.

[Alleyoop]

You can get an Adjustable wrench to take the big nuts off that is what I use.

The big nut on the clutch is 1 1/2 inchs in diameter, this adjustable wrench opens up to 1 7/8 more than you need and it has multiple uses, you can use it for other nuts or bolts on the scoot.

www.harborfreight.com/15-inch-jumbo-adjustable-wrench-39619.html

[rosiemoto]

For getting that hard to reach bolt on the valve cover, are universal joint adapters useable? It wasn't quite what I thought it was after I got it on my ratchet, it pivots on 2 points.. I'm imagining this won't be easy to use, but hopefully I can make it work.

[Alleyoop]

STOCK (13g rollers, 108mm variator): 50mph @ 6.7k rpm; TOP SPEED 56mph @ 7.2k rpm
KOSO (12g Dr P sliders, 115mm vari): 50mph @ 6.1k rpm; TOP SPEED 60mph @ 7k rpm

Now you know why I like the Koso. On my Trike with the Koso (12G Dr. P Sliders 115mm Var) 50mph @ 5.1-5.2k rpms at 60mph 6.1-6.2k rpms at 70mph 7.1-7.2k rpms. I get those low rpms because of the taller Tranny gears. But my motor has 30more cc's which creates low end torque to pull the taller gears.

From those runs I would leave good enough alone, there are not many scooters that will run as good as that.