Derbi senda problem!!!!

[JordanKratsch]

Heyyyy, here's my problem, about 3 months ago I brought this Derbi, from a guy who recently rebuilt it from scratch as a project, everything was in fully working order, I had quite a few people check it over for me, and everything was fine from everyone who checked it, but then after about a week and half of riding it, my gear two, shrugged like I dont kno it's hard to explain, my suspension kept going up and down in this gear, with the sound like it was going to blow up or something, but I thought nothing of it, and just quickly built enough rpm to get to hear 3. about a month ago, on my Derbi senda xtreme sm50, I was out on a ride/cruis, and I came to this hill, down the hill I was doing 75's touching 80, anyway my engine seamed to have died out so I pulled over, let it cool down, and it would not kick up again!!! So I had to walk it all the way back home, got it home and noticed its leaking a lot of oil from the engine, after having a chat with the mechanic he said it will need a new engine rebuild, all new parts, (Pistons,piston kits,head gasket etc.. Anyway after having the bike gone for a month, I finally got it back, and I got told specifically to only go about 25 mph for about 500 miles so this is what I did, I had many people check it all over again for me, and it was all perfect, sounding beasting but yesterday morning I took it out for a trip to town about 30 mins away, only was doing 25, then unexpectedly my engine cut out, my back wheel locked, I went sliding abit but my reaction was to hold the clutch in as it was in gear, (too make it roll) I pulled over, let it cool as it was incredibly hot!!!, let it cool, and tried to kick it back up, but the kickstart will open out, but it just won't go down!! Now I'm not sure if the Pistons have seaZed, or what? But it's really annoying knowing how much money's gone into the bike for it to just do that, I've even tried bumping it, and it won't bump! Any ideas?! The bike rolls in nuatrul, and in gear with the clutch in, all the gears feel like there still there when I'm changing them with the bike not on cause of course I can't get it started!!!!, but I really need help? Thanks for reading this essay, didn't mean it to be so long!!!
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J.kratsch

[CaNsA]

Wall of text...

Wrong section...

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It's seized again by the sounds of it. Can't tell much more without some pictures of the internals, etc.

Get a thread started in the Workshop section and use the return key to space your text into something resembling sentences and paragraphs because it's quite hard to read as it stands.
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Greetings from Shitsville!