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Post by na1x on Oct 11, 2007 19:57:55 GMT -5
 Just wanted you all to know that my JMStar MC-54-250 has turned out to be one excellent piece of equipment since I did all those mods I posted with the photos. It is extremely smooth, and the cooling and electrical systems work great. My wife loves to ride with me also. It looks like an excellent design to put the radiator in front of the gas tank. Bugs and stones will not bother it at all. I took a 200 mile trip on the scoot averaging 45-50 mph, and got about 65-70 mpg. I also noticed the fan would run for about one minute or less, and shut off for about 2 minutes or more, and the temp guage runs between 1/4 and 1/2 scale. I disconnected the wires from the bluetooth red lamp on the dash, and replaces it with a 12v LED wired in parallel with the fan motor, and now I can see whenever the fan comes on. After owning many large bikes, and a 150CC JMStar, I can honestly say this one is by far my favorite. Just make sure you do all the mods that I listed, and you'll be just as happy as I am ;D. Joe
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Post by tortoise on Oct 12, 2007 15:30:33 GMT -5
Just make sure you do all the mods that I listed Since you chose to segment your contributions on this topic, how about posting a link to previous related threads. Posting multiple threads on the same topic just makes it more difficult to research! |
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Post by na1x on Oct 12, 2007 18:25:49 GMT -5
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Post by "Big Guy" on Oct 13, 2007 10:13:49 GMT -5
You got it right! As you can tell from my user name, I happen to love the MC-54-250!
This scoot is an amazing value for the price (under 2k delivered) and I am a broker of scoot imports from China, so I have seen many brands of Japan clones. I have spent a lot of time in China visiting and meeting with the Manufacturers and a lot of time anlyzing the orders from the retail houses I broker for and in my humble opinion, the Roketa MC-54-250 is the best in its class.
I have always been a motorcycle rider but after brokering these scoots, I had one of my customers sell me one (You have to buy from a dealer to get fast part replacement). I must say, I was taken back by the performance and the ride.
Since my first experience with scoots a few years ago, I have upgraded several times, most recently to the 250, and this thing is just plain awsome value for the money!
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Post by woodnglass on Oct 14, 2007 13:58:34 GMT -5
Did you replace your stock battery as well and if so exactly with what, i.e. brand, size, etc. I have the Roketa MC-250 which looks like the pics of yours and the stock battery MFA12V9AH is bad I think and I want to replace it but I'm concerned about a 12 AH Yuasa fitting the battery compartment and the lugs being the same type of the stock. I'm not seeing a 9AH on the Yuasa sites I've been on.
I appreciate any help you can give,
Jer
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Post by "Big Guy" on Oct 14, 2007 17:11:30 GMT -5
Jerglass,
I know your not talking to me, but on my last 250, my son replaced the fuse block with one from a boat supply due to low voltage and added a volt meter. It raised the voltage by 2 amps, right in the normal range and I had the scoot for over 17000 miles with no battery problems at all until it was totalled.
Of course my scoot never sat idle for more than a day or two...
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Post by na1x on Oct 14, 2007 19:09:52 GMT -5
Hi Jer. I have the stock battery. It came with 7AH, and seems to be just fine. I don't think you would really need a 9AH battery.
Joe
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Post by soyjim on Oct 25, 2007 11:44:31 GMT -5
Nalx
I was impressed with the way you fixed your overheating problem. From that, manual research and luck I think I have solved my over heating problem and proposed a solution that may help others solve an over heating problem. It may even help you because I know you described your solution as not perfect. I haven't put the bike back together so my testing has been good but limited. I would appreciate it if you took a look at the entry "Proposed overheating solution" and told me if it has promise.
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Post by na1x on Oct 27, 2007 18:11:50 GMT -5
Hi soyjim. I found no problems with grounds to the temp guage. And also, the continuity test on the Helix is a bit different, because the temp guage is digital. Ours is analog. Proper resistance is very important thought. I know the problem lies in the sensor used. It has the wrong resistance for the circuit used, and has too sensitive a curve. That's why I added the 400 ohm resistor. I now have over 2000 miles, and not a single problem. I feel the rest of the cooling system is just fine. The radiator is in a ( SAFE ) position.
Hope that helps a bit.
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Just wanted you all to know that my JMStar MC-54-250 has turned out to be one excellent piece of equipment since I did all those mods I posted with the photos. It is extremely smooth, and the cooling and electrical systems work great. My wife loves to ride with me also.
