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Post by Lucass2T on Dec 2, 2015 4:20:57 GMT -5
Yesterday i was thinking...with a accelerometer you can easily and carefully measure acceleration. These days every smartphone has sensors to measure acceleration. That would be a nice tool to help tuning. Ofcourse other variables like windspeed, road incline, ambient temp and engine condition must stay the same.
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Post by oldgeek on Dec 2, 2015 6:39:02 GMT -5
Yesterday i was thinking...with a accelerometer you can easily and carefully measure acceleration. These days every smartphone has sensors to measure acceleration. That would be a nice tool to help tuning. Ofcourse other variables like windspeed, road incline, ambient temp and engine condition must stay the same. Yeah, that would make things a bit easier no doubt. I think Koso makes a stand alone unit, IIRC it was not terribly expensive. But an app. for a smartphone would be the ticket. |
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Post by oldgeek on Dec 2, 2015 21:19:08 GMT -5
A recent post in this thread by @lucass2t resulted in me searching for an accelerometer app for my android phone. I found a few, but I also found something that gave me an idea of how to do a project I have been interested in for some time. I have previously mentioned that I would like to have an android based configurable dashboard for my scooter to display things like speed, RPM's, temp, or whatever. I was thinking of using bluetooth to connect the sensors to the android phone. I found a few apps for the smartphone that use data from the OBD connection in cars and allow you to create a customized display of the data on your phone. The OBD data is transmitted to your phone by a inexpensive bluetooth dongle plugged into the OBD connector of your car. Evidently this technology has been around for a while already. I used to be current on gadget, electronics type stuff but I am way behind these days. Anyway, from the very little research I have done so far, the OBD data interface is CAN bus (controller area network) based. In theory one of the bluetooth OBD dongles should be easy to hack for our scooter needs. I have not used the CAN bus protocol before, but I have used other 2 wire protocols that are similar to the CAN bus in my past work in electronics. I would like to start a dedicated thread for this project, so hopefully the electronic guys around here will help out if they would like to. Link to smartphone dash project |
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Post by oldgeek on Dec 6, 2015 0:06:13 GMT -5
My buddy and I rode about 35 miles today, we had a blast! I took .10mm of shim out of the variator and gained some top speed. The highest speed the GPS recorded was 59.84 MPH briefly. I think my goal of 60 MPH is obtainable with my current setup, I just need to tweak the CVT a bit more.
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Post by 90GTVert on Dec 6, 2015 8:09:03 GMT -5
Almost there! The problem is once you hit 60 you'll wanna hit 65.  |
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Post by Lucass2T on Dec 7, 2015 4:35:52 GMT -5
Almost there! The problem is once you hit 60 you'll wanna hit 65. Its never enough...but thats just human nature  And you get used to power. When i ride my Cr500 a lot i get used to it and then im dreaming of something faster. |
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Post by oldgeek on Dec 7, 2015 18:51:42 GMT -5
I had to use a different wheel when I put the 9.3 gears in this scoot due to the difference in axle splines between the stock gears and the 9.3 gears. That left me with needing to move my michelin power pure SC tire over to the wheel that is now on the scoot. I decided to take a crack at changing tires again, but this time I had the 20 ton press to help. I used the press to break the beads, screw drivers and soapy water made the rest go fairly easy. I used my weight and feet to my advantage to help mount the tire easier. I am glad to be able to do it now, I am saving a bunch of money doing it myself, money I could have been spending on scooter parts!  Now if only I could spin balance them myself.  |
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Post by 190mech on Dec 7, 2015 19:05:35 GMT -5
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Post by 90GTVert on Dec 8, 2015 11:56:35 GMT -5
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Post by oldgeek on Dec 8, 2015 21:45:58 GMT -5
Wow! I watched that video not too long ago, and already forgot about it. Now, to build or buy? |
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Post by Corrosion on Dec 8, 2015 21:51:23 GMT -5
I got the HF one it works for me. I did have to mod it to work on 10mm axles like brent. But the bearings were okay. it does the job.
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Post by oldgeek on Dec 15, 2015 23:56:29 GMT -5
Can anyone direct me to a small stump flywheel? Preferably new.
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Post by oldgeek on Dec 17, 2015 6:03:51 GMT -5
This scoot is down again. I am not sure what happened but it lost around 1K rpm's and power seemed to be down a bit. I pulled it apart to take a look but did not find anything obvious with the piston or cylinder. However the stock flywheel is done. Apparently even though the nut holding it on is tight, the flywheel must be vibrating just a very little bit. There is some smearing (lack of a better word) of the metal at the interface between the crank and the flywheel. The shield that covers the magnets in the flywheel came loose as were the magnets. I guess the stock flywheels are not designed for 11K RPM's. I will have to order a small stump flywheel from somewhere, and hope the crank is not fubared. I guess an inner rotor iggy is what I really need but the dam things are just too expensive. The weather is crazy great here ATM (sorry to rub it in!) and I got nothing fast to ride with my buddy.  |
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Post by 190mech on Dec 17, 2015 6:33:33 GMT -5
Ive got a small taper off an Eton in good shape if you want it..
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Post by Lucass2T on Dec 17, 2015 9:50:19 GMT -5
I guess an inner rotor iggy is what I really need but the dam things are just too expensive. How much are they? Because here in Holland there are just so many 2nd hand HPI's for sale for about 120 euro's. Shipping to USA is 35 euro's so for about 150 euro (175 dollar?) you can have a very high quality ignition. You can even add a 10W lighting coil. |
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