ElectricMotorcycleForum.com

Monday was Martin Luther King Jr. holiday so I tinkered with the bike, and swapped out the 300 amp controller with the new(er) 450 am controller, and I am pleasantly pleased.  First of all the 450 is about 2 inches longer so I had to mount it vertically instead of horizontally, but that's neither here nor there.  The important thing is that even with only 4 lead acid batteries (48 volts) the bike is much quicker and I can get up to just shy of 40 mph.  I weigh 200lbs so that is pretty darn good.  I can't wait to add the other two batteries for my ultimate 72 volt goal / system... stay tuned.

got it, sorry I'm blind as a bat sometimes, thanks for your help

Go to your profile and at the botom you will find a link "show latest posts by this person" (or something similar)

http://electricmotorcycleforum.com/boards/index.php?action=profile;u=98;sa=showPosts

Does that do it?

Nope, that only works for yourself not for others, if I look at your profile I don't get the options on the left hand side, dang it, thank you for trying to help.  I'm not ranting I just didn't want to go on living like this if there was a simple way to do it, and I just didn't know how, lol

hi welcome, ask away, these members know their stuff

Replaced the 12 tooth front sprocket with a 13 tooth one on my 1989 Suzuki Katana GSX600F yesterday.  The rear is the original stock 47 tooth one.  I didn't have to add any links to the chain after adding 3 or 4 initially for the conversion as the motor sits further away than the engine/transmission had.

I think I may be getting 2 MPH more on the top speed maybe a little more somewhere around high 30's, ie 38 MPH.  The good news is the bike is not any slower off the line.  So I question all the people who told me electric bikes need to run a 5:1 gear ratio, that or I misunderstood their advice.

Bike Specs:

• Mars ME0709 motor (heavy)
• 48 Volt Alltrax 300 amp controller (soon to be upgraded to 72 volts)
  
• four 55 Ah sealed lead acid batteries (soon to be six)
  
• 48 volt Elcon 20 amp on board charger (awesome)
  
• Magura Twist Grip Throttle (kinda cheap and plasticky)
  

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welcome, having done a conversion, all I have to say is just do it, you can read stuff till you are blue in the face and the books won't tell you that although you spent 8 hours measuring and cutting your metal to the absolute perfection that once you weld your battery tray the darn batteries won't fit cause the metal has shrunk 1/32 of an inch, I'm just sayin' lol

also all the formulas in the world, pies, ratios, all that stuff are fine and dandy, but they don't account for hills, wind, low tire pressure, highway overpasses, blond chics in convertibles with haulter tops, you having stopped at In n Out Burger prior to your ride - in determining your top speed and range

I am being silly, but one message I want to send to you guys is, ALLOW YOURSELF PERMISSION TO MAKE MISTAKES, and learn from them, correct them, and move on, don't expect to get everything wright on the first try, nor sit and wait, and put things off until all the friggen stars align, you'll be waiting for ever

take your time, and go for it, you can do it !!!

400+ seems high, but those are peak values, not sustained. I think it's a 300A all day controller. You may see some small spikes that go that high. How long do the 400A peaks sustain?

You are once again correct.  I went back and looked at the data and I saw 2 second spans where the Output Current was above 300 amps, however it was only above 400 amps for a split second if that

I have to say I love this stuff, I enjoy analyzing the data, and would highly recommend newbies get programmable controllers or some sort of controllers that allow them to connect a laptop to and or display of some sorts and see what the machine is doing, have I not done this with my laptop I would wrongly assume my controller is spewing only up to 300 amps, which is not the case

I am still sorta not ok with something being rated at 300 amps and putting out 420, it's like saying hey this cars top speed is 135 MPH but you know sometimes it goes 160 MPH, lol

thanks again for your help and explanations much appreciated, much !


Date - Time - Throttle Position - Diode Temp - Battery Voltage - Output Current - Battery Current
9/14/2011    18:47:59.699     20   34.9   49.3   380   77.5
9/14/2011    18:47:59.793     30   35.4   45.2   470   141.9
9/14/2011    18:47:59.871     33   34.9   44.6   445   148.3
9/14/2011    18:47:59.964     37   34.9   44.6   440   163.9
9/14/2011    18:48:00.042     42   34.9   44.6   420   174.6
9/14/2011    18:48:00.136     46   34.9   44.8   390   180.5
9/14/2011    18:48:00.214     51   34.9   44.5   370   187.2
9/14/2011    18:48:00.307     59   34.9   44.8   360   213.2
9/14/2011    18:48:00.401     76   34.9   44.6   365   277.7
9/14/2011    18:48:00.479     76   34.9   45.0   370   281.5
9/14/2011    18:48:00.573     76   35.4   44.6   345   263.8
9/14/2011    18:48:00.651     77   34.9   44.9   345   265.2
9/14/2011    18:48:00.744     77   34.9   45.1   365   282.0
9/14/2011    18:48:00.822     77   34.9   44.8   345   266.5
9/14/2011    18:48:00.916     78   34.9   44.4   325   252.4
9/14/2011    18:48:00.994     78   34.9   44.4   305   236.8
9/14/2011    18:48:01.087     82   34.9   44.6   315   256.9

One of the features I use a lot is the search by user.  You come across a guy who knows what he is talking about and  you want to see all the threads he has started, or posts he has made giving advice.  Or you simply want to search for all the threads you have started to see if there are any new replies.  How do you do that.

The search on this forum does not allow for a wild card search in the Search for: field when you enter a users name in the by user: field.

I am not biatchin n complainin, trust me the insight on this forum is amazing and I appreciate it, I am just asking how to do something that I can do on a lot of if not all of the other forums I am a member of, so I know i am not asking for something strange