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Messages - Bobbyutton

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People 50 / Re: Breaking in New Top End & Seizing
« on: July 25, 2016, 03:56:51 PM »
I did not set the piston ring end gap, could you elaborate what I would need to do? I'm not exactly familiar with everything on the moped yet. I've been working on cars for years, I can work on a moped, I just don't know what I need to be doing necessarily.

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People 50 / Re: Breaking in New Top End & Seizing
« on: July 25, 2016, 05:33:17 AM »
So, I cleaned out everything, sanded down the piston, but the engine died when I took it out on the road after a mile or two. I don't think it will start back up this time. Can I just replace the piston, or do I have to purchase a whole new top end?

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People 50 / Re: Breaking in New Top End & Seizing
« on: July 23, 2016, 10:56:48 PM »
Thank you, I will try this and hopefully be back on the road!

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People 50 / Breaking in New Top End & Seizing
« on: July 23, 2016, 08:44:15 PM »
So I recently bought my kymco people 50 2T and it had been sitting for a while, the engine was not maintained very well, so I upgraded it to a 70cc, a charmo 47 mm big bore kit. Well I've been breaking it in for a couple days. I have not been exceeding 35-40 mph while trying to break it in, but today I gave a friend of mine a short lift to his house because frankly I was his only hope of getting home. I shouldn't have since I'm breaking in a new top end, but I did it anyways. Well right as I got to his house, and was pulling into the driveway, my moped just died as I was coming to a stop. I only did 35 with him on the back, but I'm guessing his extra weight pushed the new top end too far? I let it sit for a while before trying to make it home, and on the way home it died once more as I was doing 40 mph down the road, the engine just cut off, no jolting, nothing, so I pulled off into a parking lot. I still had about 2 miles left until I made it home so I let it sit again for about 15 minutes and then started it up again and went home. I stayed at a generous 30 but no more than 35 for the rest of the ride. I don't think I had as good of compression at this point because I could feel that i shouldn't be exceeding 35, earlier when I would ride I would stay around there just to be safe, but I knew it could go faster if I tried. But that was before I gave the kid a ride home. Well as I pulled into my driveway and was coming to a stop, it died once more just before I came to a full stop. I'm not sure what's wrong exactly, I have the slightest of ideas, but I definitely do not know what I should be doing in order to prevent any more damage and/or fix any damage already caused. I really don't want to have to replace the top end again and I don't have the money to do that anyways. Please help me

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