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Post by captincvmn on Jun 24, 2021 19:00:54 GMT -5
With the Stage6 streetrace cylinder I was getting almost exactly 40 mpg
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Post by Deleted on Jun 24, 2021 20:03:10 GMT -5
captincvmn Dang, son! I got spoiled with the $5 dollar/week gas bill. Well $6 or $7 when you figure in oil. Still, I'm having way too much fun on this thing. #worthit
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Post by repherence2 on Jun 24, 2021 21:27:11 GMT -5
repherence2 Thanks, man! I certainly couldn't have done it with all of y'all helping me out along the way. Am excited to see how she runs on the distance torture test. Around town she's outrunning regular traffic from light to light. Not that I'm regularly doing that, but it's Myrtle Beach in the summer, and there's a lotta folks who don't know their way around. Sometimes speeding up to get away from the pack is safer than slowing down. As for gas, she's going through it in this testing phase, but I expected that. Used to get 2 trips to and from work so about 70mpg with the Malossi 70cc. I am anticipating much lower fuel economy out of the 103.
Honolulu drivers suck! having a stock moped on Oahu is very dangerous in my opinion. growing up, my mom worked for State Farm insurance and she always told me, "you better never get a moped". 2 divorces and paying child supports later, i ended up getting a moped to go to work. one day i rode it to my mom's condo. the first thing she said was, "that thing better not be modified. because if it is, and you get injured in an accident, you're not covered under insurance." i flat out told her, "i'm sorry mom, but i had to modify it. i almost got taken out by cars 5 times by them changing lanes and not looking." i straight up told her that having a stock moped is far more dangerous than a modified one. a modified moped has more power to get you out of dangerous situations.
--"Sometimes speeding up to get away from the pack is safer than slowing down."
i totally agree with you on that.
--"As for gas..."
on my 94cc wide open 28 carb i would put gas on the way to work, and on the way back just to be safe. i think it was about 50 miles round trip. but that was because my gas gauge didn't work and some mornings i'd be rippin' it WOT (pegging the needle against the clear speedo cover) because i felt like will smith in I Am Legend with absolutely no one around on the streets at 130am on my way to work for 20+ miles. i think i could do a round trip on a full tank of gas but return home almost empty. this is Oahu, and if you ever seen videos on moped cruises on Oahu, there's a lot of areas where you can just rip it at WOT.
not exactly "wide open" 28
polini short bell mouth, mesh, and venturi divider installed on carb.
home made venturi divider.
venturi divider in 28mm pwk carb mouth.
lastly, im quite interested in the performance of the carb that you are running. us Oahu folk go with the "bigger is better" mentality with the 28's, nah it's because all the OKO's are basically the same price here. back in the day, i worked with a plumber, and he told me that if the pipe is too big, you lose Velocity. (in 05 i was building a turbocharged 93 accord and i made the exhaust 2.5" while everyone else said to go 3" because i was going for exhaust gas Velocity over Flow.) im sure that with my 28 i have Flow, but in your case you will have more Velocity than my set up.
the Velocity aspect in your application interests me. can't wait to see your results and i wish you Success!
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Post by Deleted on Jun 24, 2021 22:13:50 GMT -5
repherence2 Thanks, man! I am interested to see how she's gonna perform as well. Thanks for mentioning the venturi divider as well. Seems like an interesting concept and I am reading up on it. Once I've got the intake and carb situation sorted out, it'll be time to adjust the transmission. I'm figuring on low end power to keep revs in the peak power range for the YmS V8 100cc pipe. I read somewhere that it should be in the 6-8k range, but I need to verify that info. Was back when I was digging through YMS's Taiwan site. Still jealous I can't get my hands on some of that equip. LoL. Anyway, with regard to transmission, I've got the stock contra on. I've got a Malossi white that was a little too much for this bike when it was a high revving 70, but I think it might be just right now. Using 101 octane clutch springs which are basically stock, maybe a hair stiffer. Weights are at 10g but I do have 12s if needed. Variator is slightly shimmed so belt sits flat on the boss. Noticing that I am right between 6 and 8k while accelerating. Start climbing above 8 when I hit 40-45, at about 3/4. Belt is Bando 878. I do have a Gates GForce C12 belt that I am going to try out. All the same dimensions of the stock Bando except it is just a hair longer. Am curious to see if it will fit my setup, and if it does, I see it riding a bit higher in the rear pulley. Might gimme a little bit more oomph in low, then again maybe not. We'll see what she can do. If all that works out, I am going to vent the transmission cover to cool things down a little. It gets pretty toasty and I'll be running the bike a bit harder than before. Figure a little cool air can't hurt.
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Post by Deleted on Jun 25, 2021 11:14:07 GMT -5
Got the reed cage cleaned up with the Dremel. Removed all of the rough edges and the extra material on the sides. Looks a lot better. If this works out, I may just go with aluminum cages from now on. Very easy to customize/mod. Not the greatest job, but a hell of a lot nicer than what came from the factory. LoL
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Post by Deleted on Jun 25, 2021 11:48:11 GMT -5
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Post by Deleted on Jun 25, 2021 20:19:37 GMT -5
I got her back together and installed a new 44in PWK throttle cable. Did a couple test runs up and down the road. She's smooth. The new cable is a big help as well. In addition to my weirdly rigged carb, I was running the stock cable with a rubber sleeve over the top of the carb. Having the right cable for the carb is so much nicer. Who'd have known? 😉
Accomplished my first wheelie. Completely unintentional. I cranked the throttle a little too hard on take off and up she went. Exhilarating feeling. I see why people do it. I also see why I don't. Got lucky and landed without any complications. This thing has some massive torque.
Anyway, sun just set and I'm covered in muck and sand. Gonna call it a night and get cleaned up. Will post some photos of the setup.
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Post by Deleted on Jun 27, 2021 11:55:43 GMT -5
Good Lord! I think I'm still rich at 110! Getting a sputter right at WOT with the powerjet. Found out on way to work today at sustained 45mph. Just barely audible at 3/4, but when I lay on the throttle to WOT and move up to 50mph it becomes very clear and there's a hint of hesistation as it accelrerates. Very similar to what I was experiencing with the 115 at 40. Temps never rose above 250-260. Hmm. Guess I'm gonna have to try the 108. Everything else working right.
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Post by repherence2 on Jun 27, 2021 12:47:58 GMT -5
"temps never rose above 250-260." you get plenty of headroom still yet. at least 90 degrees more headroom. and that's with a safe target of 350. you could always go leaner to 370, but the reliability of pounding WOT for sustained amounts of time is risky.
looks like you might even delve into a 106, 104, and maybe even 102 main jet.
i think you should take notes of your local area weather conditions when it comes to the main jet. you might live somewhere that the barometric pressure fluctuates. your carb jetting might not like the pressure differences. here on Oahu, my biggest tuning battle is Humidity, not so much as pressure changes, unless you climbing a hill up the mountain in the rain to get to the other side of the island. but it's really pointless to tune for heavy rain here. for the most part being at sea level, we are not subject to large fluxes in barometric pressure. in my experience, if you tune it hot here and you get caught in the heavy rain, the bike will run like crap and most times you foul the plug along the way. thus, i can't really tune it on the lean side, i have to tune for the middle path, and that's the Zen of it all.
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Post by Deleted on Jun 27, 2021 13:57:35 GMT -5
I'm in a very similar situation here on the East Coast. Pressure is relatively stable here, but we get wild swings in humidity here in the South. Can fluctuate from 60 - 98%. Like trying to breathe underwater some days. I always feel bad for folks from up North and out West because they look like they're gonna melt. Anyway, humidity is the big struggle here as well.I'm a slowly work my way down and see how it goes. That long run on the way to work is great for testing. If she sputters on 108, I have the 105 and a 103 that I can work with as well. w1.weather.gov/data/obhistory/KMYR.html
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Post by Deleted on Jun 28, 2021 19:23:24 GMT -5
Took The Brick to work today since chance of rain and wet roads coming home. Now that everything's clear, dropped the main in the RT down to 108. Initial runs this afternoon had temps running at around 270-280. Does feel a little better, but at full throttle, still hesitation slight sputter. Gonna take it to work tomorrow to see how she holds up on the long run. Gonna take the 105 main with me and swap out for ride home if I'm not thrilled with it.
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Post by Deleted on Jun 29, 2021 10:24:53 GMT -5
Sputtered at 108 on the way to work. Temp never got above 270. 105 on the way home then. 103 on deck if needed.
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Post by x7rocks on Jun 29, 2021 15:53:07 GMT -5
Just curious but what's the gap you're using??
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Post by Deleted on Jun 29, 2021 20:03:45 GMT -5
Am gapped at .028, so factory recommended setting. Have confirmed using gauge. Could advance to .030,to but not quite ready to do that just yet.
Only enough, there was a bit of traffic on the ride home today, so I didn't really get to open her up. Forecast is clear tomorrow though, so gonna try it again on ride to work.
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Post by repherence2 on Jun 29, 2021 23:12:12 GMT -5
100 Main Jet for the win!
Thanks for the jetting updates. It does seem like the Velocity on your setup is different in my experience with the 26mm OKO with power jet or the 28 OKO non power jet. Neat stuff. I guess my setup with the CT manifold and big OKOs provide Flow but it lacks the Velocity.
The jet size that you're approaching reminds me of running a Polini CP24 on the 90cc.
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