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2008 Roketa MC-74-150cc & 82' Honda CM 250 Custom
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Post by bcgreatness on Jan 5, 2012 15:07:24 GMT -6
i still think the rectifier/regulator might be bad or on the verge because of the dim light issue. i priced the led bulbs and they are nice but a little expensive at the auto part store, they run about 8$ for a bulb lol if i would have known about them when i replaced the ones i blew i would have got those instead. i did confirm today blmy headlamp bulb is a 35w. spent all day trying to tune the carb for the popping upon acceleration and to no avail. muffler still gets hot enough to catch fire. maybe the wrapping on the inside of the muffler is blown out? should i drill the rivets out and re wrap the inside of muffler and buy a rivet gun and re rivet? or should i buy a new muffler? i think this one is toast... after getting perfect tan on the spark plug test the muffler still gets red hot after 30 mins of riding. any ideas mates?
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Scooter Doc
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2008 Roketa MC-74-150cc & 82' Honda CM 250 Custom
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Post by bcgreatness on Jan 5, 2012 12:31:14 GMT -6
As promised, here are the pictures of the ground wire mod alley had me do the other day. Have to take the scoot apart  preparing the heavy duty wire  the new digital multi meter  this is the ground. EVERYTHING electric on the bike had only this for a ground, which was a tab welded to the pipe frame, if thats not bad enough, it had a quarter of an inch of paint on it, even the inside of the hole was painted. only part of it getting a ground was the thread on the screw. i had to dremmel the paint off of that.  found a good spot on the valve cover. even though it is all metal with no paint, i decided to dremmel that too for a fresh connection.  this is the back of the rectifier/regulator. not sure if it applies to this one, but i do know on most of them, the unit itself is a ground to help it work properly. so i dremmeled the back side of it so when it touches the frame it gets a great ground. it grounding from the bolt that holds it wasnt enough to satisfy me.  this is the spot the rectifier/regulator bolts to. dremmeled the quarter inch of paint from that part of the tube frame ( only where the rectifier/regulator sits )  have the ground hooked back up  the new spot where the ground was run to on the valve cover  my wifes ear at the hospital  thats how properly add an additional ground wire ( not including the dart in ear ) |
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Scooter Doc
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2008 Roketa MC-74-150cc & 82' Honda CM 250 Custom
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Joined: Nov 26, 2011 21:17:27 GMT -6
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Post by bcgreatness on Jan 5, 2012 12:12:24 GMT -6
i took me and my woman on a 50 mile round trip to her moms house and back, and we went yard sale hunting a few times all over the city. this was of course all before i changed from the stock muffler to the carbon fiber one. the stock one seemed to have handled things better lol.
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Scooter Doc
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2008 Roketa MC-74-150cc & 82' Honda CM 250 Custom
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Joined: Nov 26, 2011 21:17:27 GMT -6
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Post by bcgreatness on Jan 4, 2012 16:01:16 GMT -6
clockwise is lean and counter clockwise is rich correct? if im wrong then that would explain things but im sure thats right because then it would be super lean being 3 turns out lol. i thought stock setting was like 2 and a half turns out to 2 turns out and i do know on these smaller engines you should go a little richer on the setting. so open the air box ( can i drill it? i plan on getting a filter somtime this month along with a #120 jet because the stock one is #115. so i dont think drilling would hurt it any unless sombody wants my stock airbox?
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Scooter Doc
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2008 Roketa MC-74-150cc & 82' Honda CM 250 Custom
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Post by bcgreatness on Jan 4, 2012 15:01:48 GMT -6
i think its popping because i have the pin on the carb set 3 turns out and was about to turn it even more rich but i had forgot when i put it all back together. to me the 3 turns out made the plug end look tan but it was a little blackish tan and any further and it started turning white. maybe its just the plug being old, its a torch plug, should i get an iridium? maybe that would make darn sure all the fuel is ignited before it makes its way to the headerpipe?? idk im afraid to drive it again as my heart was in my throat when i seen a constant ball of fire coming out of the tail pipe. i have been planning a trip to tampa and my means of transportation will be the scooter. its a 2 hour ride by car and on mapquest shows about 100 miles 1 way. so i need it to be in tip top shape because my wifes doctor appointment depends on it ( and out settlement from accident earlier last year ) our vehicles arent legal to make a trip that far but the scooter is lol. i really need to get this figured out.... do you think it got too hot because of WOT for a few mins? ahh so many questions im sorry...
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Scooter Doc
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2008 Roketa MC-74-150cc & 82' Honda CM 250 Custom
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Post by bcgreatness on Jan 4, 2012 14:05:41 GMT -6
went on an hour ride and just got back, volts test steady 13.1vdc on and off i guess maybe thats the batteries peak or somthing. the tach going banannas was when the bike was running and no battery hooked up, i havent tested to see if it works without hitting the front brakes. i went on an hour ride and the last 10 mins of the ride was wot and i was toping out at about 60 in 3 lanes of traffic. got to a stop light and smelt somthing burning, looked back at muffler and there was a constant ball of fire coming out of the end of the pipe and almost looked as if it were on fire. pulled off into closest parkinglot and cut her off. as it was cooling off i looked inside of the pipe and it was red hot and the whole thing was smoking like a bandit. guess i should get a stainless steel pipe instead of a carbon fiber pipe so theres nothing to melt or burn. almost had a heart attack, good thing i was in the parking lot of a hospital lol the same hospital i had to take my wife to lastnight. anyhow, as all things go with motors, once a problem is solved you can expect the engine to usher in a new one =( im thinking the carb is not tuned properly or maybe because i didnt up jet and upgrade the intake that could cause it? i did notice alot of popping upon acceleration and also around 6k-7k rpm if i hold it its a constant popping or if im WOT and let off the gas ( it doesnt backfire then ) and after i let off for a second as it decelerates, i jam back to WOT then it stutters and then pops very loud. so im guessing on this one and hopefully the electric is solved. im going to the store to get stuff to make tacos for dinner, when i get back my mission will be to upload the pictures i took as i was installing the extra ground wire, i took one for every step of the way not including when i took all of the panels off because everybody knows what that looks like and should by now know how to do that lol. be back in about an hour or so.
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Scooter Doc
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2008 Roketa MC-74-150cc & 82' Honda CM 250 Custom
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Post by bcgreatness on Jan 4, 2012 12:10:41 GMT -6
got it took apart today, alley told me to run a new ground wire from the ground the bike already had and run it over to the valve cover. i did that and i will post pics of the mod shortly. when i start the bike the volts drop down to 12.6 and slowly but surly go back up to 13.0 sometimes 13.1. on the stand with WOT the volts dont budge at all. ( this is all with the battery hooked up and running ) by the way the battery is brand new, got it a week ago and put the acid in myself. the battery did die 2 days ago and i got it charged up. it shouldnt have any bad cells. going to take it on a ride and see what happens. im thinking the rectifier/regulator might be bad so later after the ride i will check the volt and depending on results i will check the continuity.
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Scooter Doc
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2008 Roketa MC-74-150cc & 82' Honda CM 250 Custom
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Post by bcgreatness on Jan 3, 2012 15:53:30 GMT -6
did as was instructed and picked up a digital multi meter from walmart. these are the results.
battery hooked up with bike off: 13.28v dc
battery with bike running: 13.44v dc
battery unhooked: 13.22v dc ( weird )
bike running with no battery at idle ( tested the wires ): .33v dc
bike running with no battery at 6k rpm: .35-.42 v dc
bike running with no battery WOT: .48 v dc
the weird stuff: bike with no battery running, blinkers dont work, horn wont work, tach wont work.
when i hold the front brakes while bike is running with no battery the wires read 1.44v dc at idle and 5.00 - 6.00 v dc at WOT
when i hold the front brakes with bike running with no battery the tach begins to work.
did not test the rectifier/regulator as im not sure as to how just yet. any input would be appreciated.
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Scooter Doc
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2008 Roketa MC-74-150cc & 82' Honda CM 250 Custom
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Post by bcgreatness on Jan 3, 2012 10:53:33 GMT -6
my scooter has a built in bracket to hold exhaust pipes i didnt need the one u traded me, your more then welcome to have it back so you can get your exhaust hooked up =) i want to see how cool ur bike looks with that exhaust on it. come pick up your bracket already lol
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Scooter Doc
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2008 Roketa MC-74-150cc & 82' Honda CM 250 Custom
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Post by bcgreatness on Jan 2, 2012 21:42:16 GMT -6
let us know how the new can style stock exhaust system works for you, im sure you will find it quite silent but not too silent and im sure it looks 1000 times better then your first stock exhaust =) thanks for the trade by the way, it took me the remainder of the day to tune my carb to handle new exhaust but i got it finally, a bunch of riding WOT and stopping and taking my torch spark plug out and checking the color then adjusting carb and over and over and over, i think thats the reason the it got melted is because your carb was not tuned proper. just a tip if you experiance any backfires, turn the lean/rich bolt all the way in ( to the right ) and back it out 2 and a half full turns thats the stock setting. ( remember clockwise is lean, counter clock wise is rich ) on mine i have it set on 3 turns out because with gy6 motors, you always want to run a tad bit rich as it keeps the high temps lower then running too lean. please resume modding your scoot as me and im sure all of us is highly interested. and also let me know if you need help with your project as im 2 hours away =) happy scooting...
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Scooter Doc
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2008 Roketa MC-74-150cc & 82' Honda CM 250 Custom
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Post by bcgreatness on Dec 28, 2011 20:21:32 GMT -6
the headlamp is i think 14w on low ( something like that ) but i know the high for sure is 35w i would have to take the bike apart to look and be sure. also forgot to add earlier that when i turn the key off the bike stays running until i turn off the kill switch im not sure if that has to do with the fact that i unplugged the alarm/remote start system. it doesnt bother me because i can turn off from kill switch but just thought it was odd. im off for the night will post pics of my scoot tomorrow any preferred angles of view or just the basics?
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Post by bcgreatness on Dec 28, 2011 19:44:48 GMT -6
so is it safe to assume since everybody is leaning towards the rectifier/regulator, that i should just get that? im on a limited income so i can only afford about 1 maybe 2 parts a month and i have already got a battery so if i get the multimeter then i wont be able to get another part for a little while... have 4 kids and bills which come before my scooter lol was thinking about getting a trickle charger and calling it quits as i would know for sure it will start up although that would not solve the dim light issues. would one know what the regulator would cost? im sure not much. as always thanks for the extensive advice from all you scooter gurus =)
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Scooter Doc
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2008 Roketa MC-74-150cc & 82' Honda CM 250 Custom
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Post by bcgreatness on Dec 27, 2011 20:59:52 GMT -6
there wasnt a problem with the bulbs blowing or even being dim when i got it, they slowly over a month or 2 period would become more and more dim, the new battery helped that but only for about 2 days. i now run with the high beam on as my every day running light because the normal is extremely dim. dont know what causes that but im sure the battery not charging up could be tied into that problem. it has now been several days since the battery change and though the start ups sound alot weaker then when the battery was new, it has not died. maybe it could have just been bad cells on the battery, but that still does not solve all of the lights being dim, maybe it could be the rectifier/regulator. well im glad i turned here for help as your suggestions have broadened my view of what the problem could be. the 6 pound battery did in fact have bad cells and had to be replaced anyways and with the new 9 pound battery it starts up almost instantly on a cold start even though it sounds weak, i will look into obtaining a multimeter and come back for diagnostic advice. will post back when i get my hands on one of those meters, i most humbly thank all who replied to my post =) pics of scooter coming soon if you want an idea of what it looks like this is a link to a website that has the exact scooter i have down to the nuts paint bolts tires and rims. www.mxmotorsports.us/Roketa-p/mc-74-150.htm also want to add that nothing has changed on the model scooter that i have since 2007 so the 08' - 11' are all the same. |
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2008 Roketa MC-74-150cc & 82' Honda CM 250 Custom
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Post by bcgreatness on Dec 25, 2011 16:47:43 GMT -6
since your quite knowledgeable would you know if theres a way to tell what type of stator i would need without taking it all apart to look at it? i have a 08' roketta 150cc i think i need one because battery wont charge when i ride dont know why though becuase when i rev throttle wide open the lights get brighter so mabe its a cdi issue? i have no idea lol but i either need 1 or the other i already got a new battery and that didnt solve the issue. ty much =)
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Scooter Doc
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2008 Roketa MC-74-150cc & 82' Honda CM 250 Custom
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Post by bcgreatness on Dec 25, 2011 16:28:41 GMT -6
So I have a 2008 roketta 150cc got it about a month or 2 ago with only 1200 miles on it and 1 previous owner. ive put about 800 miles on it since then with little to no issues but lately it seems as if its becoming more buggy and about every day i have a reason to mostly dismantle the entire bike. ive fixed most of the minor quirks but im down to guessing on the electrical issue. when i had put around 500 miles on my scooter, i started having to charge the battery about twice a week, so i figured that was because i would always engage the alarm system when i parked it at night. then that turned into 3, 4, 5 times a week and then once a day. i chalked it up as being either the battery or stator that was bad. either the stator was working and the battery had a bad cell or the battery was fine and the stator was junk, or it could just be a wire short issue. so i went with the cheapest option and i took the scoot apart to check every last wire and come up with no conclusions there. then after i put it all back together i forgot to plug in the voltage regulator and when i fired the scoot up i blew all the bulbs which was about a 50$ mistake lol. so i took a gamble and chose to purchase a new battery instead of the stator because it was either one or the other. the stock battery was a 6 pound so i purchased a 9 pound battery with more cold cranking amps. finally went on a good hour long ride today and when i got home i shut off the motor and started it up a few times, its starting to sound weaker and weaker with each start which tells me the battery is not getting charged when i ride plus the headlight is very dim unless i am going top speed, which makes me wonder if it could be my cdi. was just wondering from you scooter pros what your opinion was on the matter. ive done a few things to try to use less power and the headlight is still dim unless the bike is reved wide open. ive eliminated a few lightbulbs that done serve much purpose but to be cosmetic, ive removed the alarm/push button start system and the speaker that goes with it ( which i am going to sell once i decide a reasonable price, comes with the module, the keychain with the buttons, and the speaker. will post pics and article in the for sale section or just message me ) so could it be the cdi or the stator? thanks for reading this novel i have typed and happy scooting to all =)
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