In pic you see where is new and old tube connection. I use inside sleeve in there. Should i leave a gap between tubes or make it tight?
I found one manual that says i should leave app.3mm gap, but this manual is old and i think made for gas welding.
As Shox you want to ensure you can fuse all three bits together. Personally i normally use an angled cut like in the pic and vee and/or gap as necessary according to wall thickness etc
I was also thinking cutting it in angle, but thought to go little easier route as engine will be attached from both ends near the cut and those tubes are different wall thickness, so would be impossible to make sleeve in lathe.
Thank you both
and those tubes are different wall thickness, so would be impossible to make sleeve in lathe.