Hello everyone, new to posting this forum thing, so if I'm posting in a wrong section or whatever let me know  but I've been reading stuff on here to help with my bike for a while now so thought I'd get involved! 

My 99 dtr recently had a top end done (like 220 miles ago) got it back did about 50 miles, and sent it straight back to the garage, as it was like as if it was running on choke, flooding itself and dying etc -,- anyway got it back and it's been fine since. Done like another 150 miles, and noticed this past week or so it's been overheating like hell, doesn't go into the red, but scarily close. And my little tank at the back has bubbled and sucked all my coolant out, done that twice Haven't been ragging it at all, just taking it easy to bed my top in, but this just randomly started, any ideas??  cheers anyway, I'm not a mechanic so apologies if It seems stupidly obvious  heard lots of things, head gasket, thermostat, blockage etc.thanks anyway! 

you should stop riding it , the head gasket has gone or one of those shit steel gaskets was fitted, get a proper Yamaha gasket fitted, they have a tin black rubber coating. If you ride it you are risking more damage!

Okay man cheers, will do, wasn't going to just incase but had to get to one of my jobs today so didn't really have a choice, didn't touch it all weekend. Heard about these shitty gaskets so I'll have a look tomorrow to see what if it is! Reckon it'll be alright? I mean runs fine and all at the moment, so I'm just hoping all I'll to do is change it, really don't have the money for another rebuild if it's affected that too! 

yeah just change the head gasket but cast your eye over the head while its off looking for warpage or cracks...it's most likely ok though, especially if you find the gasket is a crappy one

Okay mate thanks I'll order a genuine one tomorrow, found some for pretty decent prices already! My mate had this bike for like two years before I did and treated it like proper shit, had to pay out loads, basically dealing with all the fall out from no maintenance over the time he had it, determined to get it back on track though as I wanted one since I was 13 and now I'm 25, so not giving up, thanks for help!

good luck with it Josh

Okay man cheers, will do, wasn't going to just incase but had to get to one of my jobs today so didn't really have a choice, didn't touch it all weekend. Heard about these shitty gaskets so I'll have a look tomorrow to see what if it is! Reckon it'll be alright? I mean runs fine and all at the moment, so I'm just hoping all I'll to do is change it, really don't have the money for another rebuild if it's affected that too! 

The only place there is any real pressure is the cyl head, the water doesn't run around the engine like a car. It runs through the pump to the head to the rad. If your gearbox oil looks normal it can only be a bad head gasket.

Okay man thanks, my friend is a mechanic so he's going to check it out tomorrow evening, ordered a genuine yamaha gasket anyway