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Post by Zino on Aug 10, 2020 18:24:14 GMT -5
Enjoy the Z Yasuni makes great pipes . Be ready to throw on 5-10% bigger jet . You will need some lighter weights for your variator then you run now . Some where between 5 and 6 grams is where I bet you find the best performance . Stiffer clutch springs will give you better oomph at take off If you roll slow for 30 feet and then take off like turbos kick in you need stiffer springs .
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jayrod427
Scoot Enthusiast
Posts: 114
Location: Kansas
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Post by jayrod427 on Aug 10, 2020 20:47:58 GMT -5
Enjoy the Z Yasuni makes great pipes . Be ready to throw on 5-10% bigger jet . You will need some lighter weights for your variator then you run now . Some where between 5 and 6 grams is where I bet you find the best performance . Stiffer clutch springs will give you better oomph at take off If you roll slow for 30 feet and then take off like turbos kick in you need stiffer springs . It definitely needs clutch springs. Still waiting on those. They are shipping with the backorder jug. 4.3g rollers right now from the 5.9 I had in it. Liked those better with the other pipe and still seems ok with this pipe. Was a 90 main, and I put in 95 with the pipe. Runs about 335 on the trail tech on the plug. I didn’t get any more than a mile at a time tho. Damn stop lights. Now the good part. It runs steady 39-43 on this hot humid night. No more down to less than 35. About 8200-8400 rpms in that speed range. The Z is a bit quieter than the fly which I love, not quite as raspy dirt bike sound. Overall a great upgrade! Some more riding next couple weeks and bring on the big block! LOL
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jayrod427
Scoot Enthusiast
Posts: 114
Location: Kansas
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Post by jayrod427 on Aug 10, 2020 21:18:59 GMT -5
I submitted to the speed list with 43mph average, 2 runs same road both directions .
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Post by Zino on Aug 10, 2020 21:59:50 GMT -5
You have room to pick up more speed . Here is how to adjust your weights . I have a digital scale to help with this Cut 6 pieces of aluminum foil cut to the same size. You can get about a gram stuffed in each roller . Track your top speed and how it feels Run all 4.3 Run all 4.3 plus aluminum in each roller . You also could run 1/2 and 1/2 as log as you stagger them. Run them like this 4/5/4/5/4/5. If you have 2 that get same speed take the lighter one or the one that feels spunkier
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Post by Zino on Aug 10, 2020 22:16:57 GMT -5
Your plug chop from before looked good . Your temps below 335 degress is a good range. On a extended night of driving You want to see temps just level off and hang out below 350 degrees . You just dont want to see any spikes in temps beyond 350 that keep rising. when you get close on the maxing out your variator tune one last step check for full belt travel . Take a permanent marker and mark your variator from inner to outer edge . Run down the road full blast and measure how much mark is left. Stock variator you can get down to 3mm ,Malossi and polini get below 2mm when maxed out
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jayrod427
Scoot Enthusiast
Posts: 114
Location: Kansas
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Post by jayrod427 on Aug 11, 2020 8:59:24 GMT -5
Rode the beast to work this morning. Nice cool 70° morning although still humid from showers overnight. Ran about 325-330 even got a couple lights in a row to have 2-3 mile wot blasts. I think I'm prob just a smidge rich, waiting on some new plugs to chop one, and some new jets with smaller increments. Might just leave this jet a while until it cools off a little and and dries out the humidity would prob be about right.
Warm restart still requires throttle input to start.... I have tried tweaking the pilot quite a bit both ways and cold choke start is always perfect, but warm restarts 20+ minutes after riding requires throttle and stumbles quite a bit first few seconds. Warm idle is around 1,800 nicely once it's running clean.
edit:temp typos
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Post by Zino on Aug 11, 2020 17:13:53 GMT -5
Those are low temps for wide open blasts . Pick out the next 3 lower jets and run wide open down the same stretch of road and distance 1/2 mile is good enough.
Make Notes on top speed for your current jet and the smaller 2 and how each feels when you hit the throttle does it feel a little angrier and listen to the sound as you go to a smaller jet the exhaust will sound less deep . You want to avoid a zingy sound That means you are going to the leaner side .
Take the fastest jet if 2 are the same speed take the richer one .
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jayrod427
Scoot Enthusiast
Posts: 114
Location: Kansas
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Post by jayrod427 on Aug 11, 2020 23:12:17 GMT -5
Those are low temps for wide open blasts . Pick out the next 3 lower jets and run wide open down the same stretch of road and distance 1/2 mile is good enough. Make Notes on top speed for your current jet and the smaller 2 and how each feels when you hit the throttle does it feel a little angrier and listen to the sound as you go to a smaller jet the exhaust will sound less deep . You want to avoid a zingy sound That means you are going to the leaner side . Take the fastest jet if 2 are the same speed take the richer one . I just realized I’m a little special today.... wasn’t 225, it was 325.... saw 340 on a 2 mile blast today at 95 degrees outside. This evening couple mile blast only peeked 335 in the cooler air. Did have a nice little tucked run on the way home. No idea speed as gps wasn’t on, but saw 8,900 rpm. I’d guess easily 47 or so. Speedo needle was into the odometer. Lol
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Post by Zino on Aug 12, 2020 6:46:35 GMT -5
If you are at 340 ish on a 2 mile run I would leave jetting alone for now .
If you are burying the the needle you are probably closer to 48-50 . You should check your cvt for travel with your vents .
The stock motor port timing holds you back The exhaust port is half closed. When you get your kit on there paired with the Yasuni you will pick up a few hundred more rpms with power . So you will bury the needle easier .
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jayrod427
Scoot Enthusiast
Posts: 114
Location: Kansas
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Post by jayrod427 on Aug 12, 2020 10:23:12 GMT -5
Something I've observed several times now, and waited to gather as much info as I could.
When sitting at a stop light the bike idles(1,800 rpm) perfectly smooth as far as the engine, but the whole bike shakes. The connection I have made is that when you squeeze the rear brake firmly the shake stops, but a vibrating sound starts. Let off the brake and the sound stops and the shake takes over. The sound is now louder with the vented cvt, so I assumed something in there. With the cover off it became obvious what the root cause is. At idle the belt vibrates quite a bit. raise rpm to 2500 or so and it lessens, then riding is perfectly smooth. When I say the belt vibrates I mean it flaps for lack of a better word in the long section between the pulleys. I can prob grab a vid tonight if needed. Without squeezing the brake it translates into the whole bike as the back tire is trying to lurch with that vibration like maybe the clutch is chattering and trying to grab with that belt vibration.
So with all that would you guys say belt is too loose, too tight, or something else? All stock original belt, contra, and clutch with only different variator weights.
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Post by Zino on Aug 12, 2020 16:54:23 GMT -5
I am betting your belt is too loose . What you are experiencing is most likely belt slap. On your varaiator behind the variator fan is a small washer . They come in different thickness. That is usually the fix . It is also how we get that last bit of belt travel on the variator we use different shims . In bad motorsooters recent post he shimmed for a couple miles extra on his sym mio.
When you rev it up the variator starts to push together and stops the belt slap.
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jayrod427
Scoot Enthusiast
Posts: 114
Location: Kansas
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Post by jayrod427 on Aug 12, 2020 17:35:59 GMT -5
I am betting your belt is too loose . What you are experiencing is most likely belt slap. On your varaiator behind the variator fan is a small washer . They come in different thickness. That is usually the fix . It is also how we get that last bit of belt travel on the variator we use different shims . In bad motorsooters recent post he shimmed for a couple miles extra on his sym mio. When you rev it up the variator starts to push together and stops the belt slap. There was a very thin washer behind that. Same result with and without the washer, and I did not really notice any difference in acceleration or top speed with or without it. Do I need to replace the belt? With 4200 miles is it getting stretched? Yes now that you say that slap is what I would call it.
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jayrod427
Scoot Enthusiast
Posts: 114
Location: Kansas
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Post by jayrod427 on Aug 12, 2020 17:37:53 GMT -5
If you are at 340 ish on a 2 mile run I would leave jetting alone for now . If you are burying the the needle you are probably closer to 48-50 . You should check your cvt for travel with your vents . The stock motor port timing holds you back The exhaust port is half closed. When you get your kit on there paired with the Yasuni you will pick up a few hundred more rpms with power . So you will bury the needle easier . When you’re right you’re right. When the needle is pegged into the corner of the odometer is this picture. tuck down a hill.
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Post by Zino on Aug 12, 2020 17:48:48 GMT -5
Now you see why Yasuni gets High Marks . High 40's with just a pipe .
Just think you are going to pick up another notch of power with the kit you got coming. It might only add a couple miles to the top end but you will bury the needle quicker.
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jayrod427
Scoot Enthusiast
Posts: 114
Location: Kansas
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Post by jayrod427 on Aug 12, 2020 17:50:57 GMT -5
Now you see why Yasuni gets High Marks . High 40's with just a pipe . Just think you are going to pick up another notch of power with the kit you got coming. It might only add a couple miles to the top end but you will bury the needle quicker. That is the plan. Top end is fun, but my main goal is acceleration and handily maintain 40-45 in adverse conditions. Yes the Z made a MONSTER difference!
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