Hi guys. This is my first thread so I'll introduce myself here. I'm Dave, I live in australia and I own an xr400. I'm a heavy diesel mechanic and try to dabble in bikes. Anyway, seeing as I'm not as clued up on bikes as I am with big equipment, I was wondering if anyone could help. I'm doing the bst40 conversion on my xr400 and was wondering if anyone could give me a step by step instruction on how to instal it on my bike, ie: what/where the vent hoses ect go? I have done all the mods necessary on the carb and have bought a jet and seal kit. Thanks in advance. Dave.