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Post by tsimi on Nov 30, 2014 23:33:30 GMT -5
my OR Variator arrived! When i put the two halfs together i have a space of 15mm so the belt should be able to travel all the way up to reach a better top speed.  as you can see the center part is flat and not all the way straight till the middle like the stock Variator, make sense? I hope that will give me a better belt drop to the center (Boss) and therefore a better take off. Here a picture of my stock Variator for comparison.  |
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Post by niz76 on Nov 30, 2014 23:40:05 GMT -5
Sweet! Let us know what you think!
90GTvert has an article in the tech section where he shows how to mod the faces of the vari by filing or shaving them down... Looks like the OR comes that way!
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Post by Sitticuss on Dec 1, 2014 3:22:04 GMT -5
Yes very nice indeed sir. Please keep us posted on how it performs.
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Post by tsimi on Dec 1, 2014 19:30:37 GMT -5
OK guys I couldn't wait till the weekend to install the new Variator so I went out to that freezing cold night yesterday and installed it. So let's fresh up the memory and begin with the initial setup. Before: Stock Variator 3x 6 and 3x 5.5 roller weights extra washer/shim (shim thickness 1mm) main jet #72 Top Speed reached according to Ulysse was 67km/h Highest rpm reached was 9200rpm Avarage rpm was 7000-7500rpm Marked Variator had approx. 5mm left so the belt didn't travel all the way out.  Setup for my first test run (distance 2.5km) OR Variator 3x 6 and 3x 5.5 roller weights extra washer/shim (shim thickness 1mm) main jet #72 Top Speed reached according to Ulysse was 68km/h Highest rpm reached was 8000rpm Avarage rpm was 6000-6500rpm Marked Variator had approx. 3mm left so the belt again didn't travel all the way out. The front face pulley though had nearly no marking left maybe not even 1mm. I also felt a drop of acceleration power after speeds of 40km/h and gained back power once drove over 50km/h. The good part is the vicious takeoff is back and stronger than ever. So as i thought the cutted inner part of the new Vario have a small impact on that and of course the additional Shim.  Second test run and current setting for this week is OR Variator 6x 5.5 roller weights ! removed the extra shim/washer ! main jet #72 Top Speed reached according to Ulysse was 77km/h (a plus of 10km/h) Highest rpm reached was 8200rpm Average rpm was 6500-7000rpm I haven't looked at the marking on the Variator since it got way too cold to stay longer outside. But i guess it should be mostly gone, i was more worried that the belt would jump out. Now i got a let's say decent takeoff not so powerful as the first run but good enough for daily driving. And steady acceleration all the way to the 77km/h. By my feeling, the acceleration to reach the top speed is not that fast as it used to be (currently: 0-60km/h in 9.06s). Also lost a bit of the hill power since the rpm has dropped from previous 9200rpm to max. 8200rpm So i am loosing around 1000rpm compare to before. My theory was, to counter the stiffer torque spring i need more heavy roller weights but going with the same setup as before wasn't giving me good results but 6x 5.5gr rollers perform better at lower range speeds. So we are back to the mouse and cat game. Next i will put back the #68 main jet and order a #70 just in case. I have to get the rpms back up again to max. 9000-9200rpms otherwise i will loose at the hills all the time. I will continue to drive this week like it is for now and do more adjusting over the weekend again. |
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Post by jhobe6678 on Dec 1, 2014 19:42:05 GMT -5
Nice job! Sounds like what my M1 is doing just about! Except I probably have some weight on you, I'm 240lbs so I can't expect too much out of it. I have to say though your jet size for a cold climate sounds small? Then again I am jetting both my bikes for 72cc kits and around 70-80°F temps. Not sure what yours are. You still have the stock 49cc and what intake are you using?
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Post by tsimi on Dec 1, 2014 20:00:20 GMT -5
Stock 49cc nothing touched there.
Intake? You mean that hard, black rubber thing where you connect the carb?
If yes, stock just replaced about a year ago.
I am around 163 pounds (74kg)
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Post by Sitticuss on Dec 1, 2014 20:14:59 GMT -5
Very Nice... a lot of good info there...have you tried 5g rollers...I prefer a 1k contra myself and 2k clutch springs....I am heavy on the throttle though..
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Post by tsimi on Dec 1, 2014 20:40:21 GMT -5
No not yet...my theory was, heavier rollers to counter the 1k contra spring.
In the past i used 6x 5g rollers and i just couldn't get up to speed then niz76 recommended to use heavier rollers so that the centrifugal force would counter the stiff torque spring so i went with a 3x6 and 3x5.5 setting and that did the trick that time but for some reason it won't work with the new Vario. But i guess it's time for trial and error....
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Post by jhobe6678 on Dec 1, 2014 21:01:46 GMT -5
Stock 49cc nothing touched there. Intake? You mean that hard, black rubber thing where you connect the carb? If yes, stock just replaced about a year ago. I am around 163 pounds (74kg) Sorry, I meant the air box or filter.  And as for the new variator and weights, yeah you will need to find the sweet spot. When I installed the Hoca vari on my M1, the stock weights were 4g which worked well for the Hoca, which came with 9g. 9g in a 50cc? With my girth on there? HAH! I could push it faster up to speed than it would move lol. Now I don't know. I also am trying out sliders on it too. I hear they make a difference? I don't know. I still am playing with those too. Be patient, you'll find it. Sometimes you have to go past the finish line to see it. |
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Post by tsimi on Dec 1, 2014 21:13:24 GMT -5
Stock 49cc nothing touched there. Intake? You mean that hard, black rubber thing where you connect the carb? If yes, stock just replaced about a year ago. I am around 163 pounds (74kg) Sorry, I meant the air box or filter. And as for the new variator and weights, yeah you will need to find the sweet spot. When I installed the Hoca vari on my M1, the stock weights were 4g which worked well for the Hoca, which came with 9g. 9g in a 50cc? With my girth on there? HAH! I could push it faster up to speed than it would move lol. Now I don't know. I also am trying out sliders on it too. I hear they make a difference? I don't know. I still am playing with those too. Be patient, you'll find it. Sometimes you have to go past the finish line to see it. AH I see! Airbox...stock too. Just replaced the stock filter about a year ago and checked it just few days ago. Everything seems fine. 9g on a 50cc  that is quite heavy. My scoot had 7g stock and i had good results in the past with 6g, 5.5g combinations or just 5g. Yeah, you're probably right...i just keep testing until i get the desired result. I will keep you all informed as how it goes. Just too many factors, body weight, weather, rollers, belt, clutch, vario......  |
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Post by jhobe6678 on Dec 1, 2014 21:23:15 GMT -5
Oh trust me, I know. As I was riding my M1 tonight, just the gusts of wind was changing my A/F ratio at WOT a couple of times lol. It was like the air was getting sucked out of or blown into the motor and screwed it up. These little things are sensitive.
And good to know you're still stock on the airbox. I just hope you aren't burning up the insides with too lean of a jet is all. But hey, climate makes a difference. Where I am, I'm barely 10-20 feet above sea level so pressure is no big deal. It's the density of the air with humidity and temp that throw us off.
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Post by tsimi on Dec 1, 2014 22:08:37 GMT -5
Same here my friend. Very humid! Not so high above sea level.
Regarding the main jet, stock was 68 and i changed it to 72. I checked tke spark plug and it looked like i was driving too lean.
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Post by jhobe6678 on Dec 1, 2014 22:13:53 GMT -5
Same here my friend. Very humid! Not so high above sea level. Regarding the main jet, stock was 68 and i changed it to 72. I checked tke spark plug and it looked like i was driving too lean. Ah ok. Yeah they make em lean from the factory usually. My M1 (keep in mind that's a 4t not a 2t) had I think a 75 in the stock carb. When I got the Keihin carb I threw an 80 in there. Now with the BBK, I went to a 95 just to be safe and break in the piston and cylinder. I'll probably bring it down to a 90 at some point, which may bring my speed up a little too. It's already got lots more power than it did before. My Baccio is a whole different story though. I have to exercise patience with that one and wait for the new carb to come in. It's coming from China, hopefully not on the slow boat.   |
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Post by tsimi on Dec 1, 2014 22:51:21 GMT -5
Does a carb change make a big difference in performance?
How is a carb affecting the takeoff power? Acceleration? Top speed?
What things do I have to consider to replace or upgrade once the carb has been upgraded?
And what about the other jet? I think they call it slow jet? Would changing the slow jet affect my takeoff?
When i was 14 years old we used to tune up Piaggio Si and Ciao Mopeds and they had 12/7 carbs in them and we use to drill them up or replace with a 13/13 carb. Damn shame that i can't remember what those 13/13 or 12/7 or 12/10 numbers meant.
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Post by jhobe6678 on Dec 2, 2014 5:15:57 GMT -5
Does a carb change make a big difference in performance? How is a carb affecting the takeoff power? Acceleration? Top speed? What things do I have to consider to replace or upgrade once the carb has been upgraded? And what about the other jet? I think they call it slow jet? Would changing the slow jet affect my takeoff? When i was 14 years old we used to tune up Piaggio Si and Ciao Mopeds and they had 12/7 carbs in them and we use to drill them up or replace with a 13/13 carb. Damn shame that i can't remember what those 13/13 or 12/7 or 12/10 numbers meant. I couldn't tell you entirely what a carb change would do, it all depends on what you have on the engine and all. I know there's an advantage to air flow, fuel mixture and response. I'm sure someone else can chime in with more details on that. But yes, it can affect your engine a lot, not so much giving you more speed and all, just a better healthier responding engine. |
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that is quite heavy. My scoot had 7g stock and i had good results in the past with 6g, 5.5g combinations or just 5g.