Happy new year lads, here's a little "end of season" vid from my streetbike crew, located in the northern part of Jutland (Denmark) https://www.youtube.com/watch?v=451ZGBBZMEA - also a little bit of me riding my DT 125 R in there 
Link to our other vids:
Season 1 https://www.youtube.com/watch?v=-n8USrV1m7w
Season 2 https://www.youtube.com/watch?v=W4zDvHaFuPc
Let me know what you think 
Sooo, time for an update.
Turns out it WASN'T Athena gaskets I fitted, rather some chinese noname ones - I had the top end gasket kit laying around for ages (can't remember where I bought it from) and didn't look much at the package when I fitted the new parts, but now I have done the light skim of the head and barrel, fitted Athena gaskets and guess what - no more overpressure in the radiator And it feels like the compression has increased quite a lot too (duh).
Merry Christmas from Denmark!
Det ser sgu godt ud, Jens 
Hi..
Have anyone tried to swap out the springs in the stock forks out with some progressive from Wilbers, Wirth, Hyperpro etc? If so, I would like to hear som experiences with them. I'm looking to stiffen up the front end (giggity) without doing a complete fork swap.
@Ads123 said in Overpressure in cooling system:
Head gasket has gone mate 100% ha he that and all will be sorted
Yep, it sure was the head gasket
@Calum said in Overpressure in cooling system:
Yeah that's the usual suspect on these bikes. I dismissed it because you said you had used an Athena gasket. I would love to build an engine with those cheap gaskets and NOT have it fail.
They are notoriously bad!
I really believed I did use Athena gaskets, my mistake - won't do that again, that's for sure.
Hi guys,
Well, it seems everytime I solve an issue with my DT, along comes another. I just replaced the piston because I struggled with piston slap - turned out to be the piston fitted when the barrel was rebored was too small - while I was at it, I fitted another 3MB head a had laying around in mint condition, moved the thermostat and housing over etc. Fired the bike up, sounds great, no weird noises anymore - however, when filling the cooling system I discovered that somehow the pressure in the system is way too high - with the cap off the radiator at squirts a large amount of coolant right out, everytime I give it some throttle, this happens from cold start and continues when the engine is hot, if I fit the radiator cap it just comes out from the coolant resorvoir instead.
Any ideas why this happens? Only thing I can think off is a bad bottom or head gasket, but this seems unlikely as it would have to be very leaky to make this kind of issue, and I was very thorough as always.
@britshgigolo Nope, nothing - I will probably investigate it further after christmas, i'm pretty busy atm - if I find a solution, I will of course share it here - in the meantime, if someone have a suggestion to a possible cause/solution, please let me know!
Hi..
Just about done with my DT 125 R, and one of the minor details (at least I hope it is, lol) is starting to bug me out - the engine have been completely rebuild with rebored barrel to new wössner piston, crank rebuilt, all bearings in engine and gearbox, waterpump and clutch kit.
Check out my video: https://www.youtube.com/watch?v=F31U322ZwD4&feature=youtu.be
This ticking/rattle noise have been there since the rebuild. Off course I investigated right after the first test ride, removed the top end and everything looked fine, so I refitted it and have now done about 500 km since rebuild, and the bike is running strong, no issues at all.
Can any of you recognize the sound? If yes, should I be worried?
