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Post by jetjock79 on Oct 3, 2013 7:44:16 GMT -6
I was posting on here hoping that this was a common problem, and that there was a good fix for it.
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Post by jetjock79 on Oct 3, 2013 7:43:28 GMT -6
She is at 2 1/2 out now since I cleaned the carb. I was doing a little more research last night and found that lock tite made a purple brand that is used for that exact same purpose. It's not like the blue, and nowhere near the red.....just adds resistance. I'm going to try that today and see how I fair. I highly doubt I'll be able to buy a larger spring that will fit the screw.....so it's either the purple locktite, or gas proof Teflon tape.
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Post by jetjock79 on Oct 2, 2013 14:33:50 GMT -6
So today I cleaned the carb. And did a good job of it because she sparked up very vividly. As I was adjusting the mixture screw....I noticed that she wasn't holding her last position, due to the vibrations of the engine. How can I increase the tension on that screw that would allow me to set it, and then not have it move, causing the erratic changes in engine rpm? I was thinking Teflon tape? I remember this happening once before at a shop I used to work at,...but can't remember how we solved it. Thanks for any advice!!
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Post by jetjock79 on Oct 2, 2013 14:30:17 GMT -6
I just cleaned the carb today, and will be trying this out tomorrow. Already took the vent hose of the charcoal canister, blew into it with the gas cap off,....and could see that it was free flowing. I just ran into a slight problem that didn't allow me to take her for a quick spin today. A/f mixture screw is crazy loose, and keeps changing its position while the scooter is running. I'll post another thread about that,...but will post back on here about my venting issue when I get her out. Thanks again!!!
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Post by jetjock79 on Oct 2, 2013 14:27:11 GMT -6
Thanks JR.......that was a huge help. I couldn't find that info anywhere!!
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Post by jetjock79 on Sept 28, 2013 10:59:29 GMT -6
I'll have to surely look at that, job. There is a vent front the fuel tank, that goes to the charcoal canister though......wouldn't that be enough to vent out the tank? My issue sure sounds like fuel exhaustion from the carb bowl.......wish I had a screw driver with me at the time to unscrew the carb drain screw and see if there was any fuel left in her. As I cranked her though. ....she came back to life slowly....like when you drain the carb drain screw, and then try to start her again for the first time.
What pump did you replace yours with? I heard some people use the Mikuni DF44 as a direct replacement, but some use the DF52 because it had double the output.
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Post by jetjock79 on Sept 27, 2013 11:29:12 GMT -6
Hey everyone.......took the scoot out for the first time today after putting her back together. Was going to take her on a half hour ride....which included some freeway. All was fine four about four miles or so.....speeds of 45-55, with an occasional stop at a light. Just before getting on the freeway,......I had been doing about 60 or so for a while at about 6, 000 rpms consistantly. Just as I was giving her gas to get on the on ramp......the engine just quit on me. I pulled over and tried to start her up again......no go!! After a little bit of cranking her.....she came back alive.
Could this be a fuel pump issue? She is a 2008 54 250B with 1000 miles on her with original pump. Four turns out on the a/f mixture, which seems to work better for cold starts (2 1/2 turns made for hard starting when bone cold). Thanks for any advice on this!! She rides great, and I was really looking forward to having her on the ride today. Had to take the Ducati instead.
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Post by jetjock79 on Sept 27, 2013 8:33:36 GMT -6
Hey everyone,....looking to replace my front brake pads. They aren't worn at all....but they sure don't stop worth anything. I flushed out the fluid (both front and rear), and now have positive pressure on both, but the pads seem to "slip" to a stop.....rather than grip. I'm not looking for a fix (I would try light sanding the pad and rotor), because it's a Chinese pad,.....so might as well just replace it. I tried calling the Honda dealer this morning, and they told me they only have pads for up to a 2007 reflex........no 2008. Any thoughts where I can buy these pads for a 2008 mc 54 250B Linhai engine? Thanks!! Also, any tips on doing this job that may be different from other motorcycles or cars would be appreciated. If the job is the same, then I'll be just fine!
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Post by jetjock79 on Sept 26, 2013 17:48:47 GMT -6
Thanks for all the advice! Allyoop.....that looks like exactly what I'm looking for! I'm just looking to acces my mixture more readily. As the sea foam starts working its magic, and as the seasons change,....I want to be able to set the scoot up just right on the fly. I do have the 90degree screw driver, but it works best with the plastics off on the right side. I'll see how much more attention she will need as the carb gets more and more clean as the sea foam does it's job. Thanks again for the insight!
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Post by jetjock79 on Sept 25, 2013 9:30:26 GMT -6
Probably should have specified: I have the 257cc linhai engine. Thanks!
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Post by jetjock79 on Sept 25, 2013 6:20:32 GMT -6
Hey everyone! I'm just about done with all the inspections, and fluid replacements on a 2008 Roketa 250B that I just bought used. Has 1,000 miles on it. Once the last plastics go on, it's going to be very difficult to be able to adjust the A/F mixture screw, since mine is the one located on the bottom side of the intake. I remember someone doing a mod that had a steel or metal cable attached to it, that let him adjustment screw from an extended location like a side body panel. Since I'll be running sea foam and all through her now to get her to run better, I'm sure I'll have to tweek the adjustment some more, and just want to be able to do it more easily. I can't find the link for that thread because of the four letter limitation on our search. Anyone have access to that, or know of an easier way to be able to adjust her? Thanks!!
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Post by jetjock79 on Sept 22, 2013 17:52:48 GMT -6
Thank you all so much!! This group seems to be so helpful! Looks like I was doing everything right, but there was a stubborn air pocket in the line from the thermostat to the sensor that turns the fan on. I pulled the line until water spewed out (steamy and all), then all I had to do was reconnect her. A few turns of the throttle and the temp came right down,....then eventually the fan kicked on. Thanks all for the help!!!!! Tomorrow will flinch again and add the coolant!!
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Post by jetjock79 on Sept 22, 2013 3:21:26 GMT -6
Thanks......definitely didn't burp it, and am going to do this today. Fan and everything worked fine before the flush.......came on halfway up the temperature gauge. Now.....the temp just sky rockets and no fan or anything.....have to shut it off before it just reaches overheating. I can't really take it around the block right now or else it will just overheat, but hopefully after adding more fluid, she will do fine. How do you know when the burping process is done?
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Post by jetjock79 on Sept 21, 2013 16:45:23 GMT -6
Hey everyone....just ran into an issue here with my 250b. She is a 2008, and was bought by the previous owner in 2010. I bought it four days ago, and started a complete fluid change, and overall checkout of the bike. Everything good so far, but had some issues while draining the coolant. Previous owner still had the Chinese cool aid in there, and surprisingly enough, she was running just fine on it. I wanted the real deal coolant, so I began to flush her. Opened the radiator cap (under seat just above the carb.), and then opened the coolant drain on the water pump housing (lower most screw). Fluid came out ok......and then filled her with water. Ran the scoot again with radiator cap off and drain screw screwed back in. I noticed that I wasn't getting anything from the fan turning on, or for that matter,....not being able to add in more water.
I then turned the scoot off, opened the drain screw, and then blew out all the coolant/water by using compressed air (from a weak electric blower used to blow up air mattresses) positioned on the radiator fill. Tons of old coolant came out......more than I put in. I then tried to fill the coolant up again, and she didn't take anywhere near what came out. I then started the scoot, and was able to put some more water in,.....but the fan didn't turn on. She just kept climbing up in temperature though. I repeated this process again one more time, and still nothing. Fluid does come out of the drain plug after she runs, but not a lot at all.
What's going on here? I know it could the thermostat, but how does the temperature get read on the dash, but the fan not kick on?! Please help ya'll!! Scoot has 1,000 miles.
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