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So if I lose the butterfly bracket, the carbs are fine to just hang in those intakes? I know it sounds silly but I just want to be sure haha! I noticed on some BS38 models, there is a right angle bracket to hold the bottom of them... is that something I need to worry about? I've done a float...

Ok so a lot to unpack in these comments, I really appreciate the advice! I have a Clymer manual that I've poured over and I have also gone through the carb guide multiple times, definitely a wealth of knowledge. Even with the manual, the forums still have the finer details! I got home this...

Upon more digging and investigation, it gets worse. Previous owner or someone along the line has used two different sized needles!!! Shorter needle is 4JN19-4 Longer needle is 4N8-4 What's worse is, I believed that based on the jetting I found originally, I had Z6 Long needle jets. Upon...

I used this spec sheet from https://thexscafedotcom.wordpress.com/2011/01/10/xs650-carbs-mikuni/ Judging by my original jets (#130 Main, #45 Pilot and Z-6 Long Needle), I would say they are pre '76.

The frame number is different to the engine number, bike is definitely a 'bitsa' and has been slapped together by an older guy. Neither the frame or engine had been registered in Australia before so it was an interesting process getting it done... a story for another time! I've put in brand...

So I bought my first bike.... definitely a parts bike from what I can tell, the US (which is weird in Australia). Rode around on it for about a week but was having trouble with hesitation, plug fouling etc. Found air leaks around the intake boots so I decided to buy new boots, gaskets and...