@declan you say tight as a good thing? It really isn't you will be burning your clutch up

Depends which TDR you've got. If its the deltabox one then no as they have their own unique fit, where as the Italian ones are / appear identical to DT-R ones. The other bonus is that I doubt the Italian ones were ever restricted.

@darty he said the inner cable was 115cm but I got it down to more like 119cm

That piston is a bloody work of art! Wow. DTR/RE/X/Derbi GPR/KTM LC2/SachsZZ125 - Can all run the same 3MB piston. DTR-DTRE, are the same barrel and stroke.

@declan Yeah, like I said. Get it all back to exactly how it should be. Then we can help to diagnose the fault. It might be overshadowed by one of the many mods that have been done to the bike, hence why we are all struggling to come up with a single solution. Or learn how jetting works. There is plenty of guidance on this forum for said information.

Worse case its only £41+vat complete new

@Calum I know it's my doing but I had to fit and adjuster so it's all done now

@Jens-Eskildsen It would make sense for the pump to be designed that way. The oil pump is controlled by two elements, indirectly from the primary shaft, and by the cable. However, if you look at the pressure at the crankcase using a vacuum gauge, I'm sure you'd see negative air pressure. Since my car has a vacuum gauge, I know when my foot is off the throttle I see like -0.8bar.

Been on the RD sites and they are full of info on these bushes ???? Shocked as I've done a lot of Dt's over the years and never had this problem. A firm called tss make billet power valves and bushes and there is talk of boring out old bushes and having a sleeve pressed in.

big thanks for all the replys.got it all running today.replaced the clutch as well.cheers

Agreed on the verniers you cant meassure the cylinder precisely with those.

As said, two strokes smoke. So just saying it smokes isn't an indication of how good the deal is. If it's blue smoke, then at worst the piston rings are worn out. If it's black smoke then it needs new crank seals. Neither are really a problem for a two stroke engine to be honest.

@Calum also If you look close it looks a slight shade of gold whereas 2 stroke is black alll the way through so +1 on gearbox oil

@Jens-Eskildsen If the bottle is overfilled, it SHOULD just leak out the overflow hose. But so long as the pressure is gradual. If it gets a surge it will rupture the cap.

@Calum thanks

@CYBER-NINJA will when I can air box is complete and sealed up it does hesitate if I quickly rev from idle but when riding it's perfect

Hello there ! 100% item 7 from crankcase i recently rework my engine...

Cheers guys