Speedmaster Exhaust Header Bolt Snapped, Anyone Familiar With These Bolts??

Thanks everyone.

Thanks for sending this over. I couldn't see this stud in the exhaust system diagrams where it has the nut listed but now I found it I can just order replacements rather than messing about with the old ones.

 

Thanks for the tips everyone. The stuck studs are having a bit of a WD40 massage before I try and get them out. The biggest problem is getting at them (with big hands and tools!). Wouldn't it be nice to have a workshop. I will cut the old ones that are stuck on the pipes off and use all new replacements (T3100015 Stud).

Part of the problem before was that I couldn't find these stud bolts listed as a part which made me panic and think they were meant to be welded in the head! but I was trying to find them in the exhaust systems diagrams, where they have the nuts listed, rather than in the diagram of the head (https://www.worldoftriumph.com/collections/100066266-0-2?type=speedmaster-efi this is where they are https://www.worldoftriumph.com/collections/100066280-0-2?type=speedmaster-efi)

Another problem I have is a broken oxygen sensor. Can't believe how much Triumph want for these things. I was tempted to remove them altogether because I've heard that it makes for a much smoother ride, but an engineer friend of mine recons these engines prefer a leaner mix and these sensors do help with more than saving a few quid on fuel. Also unsure if it's an MOT requirement now? Thankfully found a used one on ebay for £30 rather than the £150 Triumph want.