Yeah. Nearly 1800quid. Got a decent 2ndhand one on eBay for 150. Currently see it as a disposable consumable at that price. And not too hard to fit. Pretty straight forward once you've got that lower shock bolt out.
Definately get the engine coated...! And if the whole thing is coming to pieces... Then anything else that can be!
Followed this with some interest. I recently faced a similar decision after I acquired my sons 2010 blown MTS. I’d ridden the bike before and we had agreed I would buy it – but it went pop on his last ride out with it. (You couldn’t make it up). As the OP has already decided to go down the rebuild route, it’s not really offering any advice, but just my own experience, faced with the same decision. My son’s description of the noises emanating led us to believe it was big end failure. And opening her up did reveal the sad damage with a hammered big end, demolished shells, battered crank and con rod (Horizontal cylinder). I estimated the rebuild at a minimum £2k to include replacing various other bits that would be sensible to replace at the same time. While deciding what to do, I was searching used engines to get some idea of prices. After a few months of this it appeared that the early 1198 fetches a premium with some UK sellers asking £3k + for a 30k mile example ! The twin spark and DVT being generally much cheaper. I’d also been told / read on this site that the twin spark can be modded to replace the earlier single spark motor without too many problems. So, I recently sourced a 2017 Diavel engine, 800 miles old for £1500. That’s the complete engine except for the belt covers, though the original 2010 covers fit perfect. It’s the twin spark non DVT engine. Obviously it’s like new and the seller had already stripped the heads off to check the internals and refitted complete with new gaskets and belts. He supplied photo evidence of this. The mods do require some work and a little cost but nothing significant or too difficult. For me, this was a no brainer choice because: a) Cheaper than a rebuild b) It’s cheaper than the single spark engine c) All the valves are well in spec d) I wasn’t sure what had caused the big end failure and I certainly didn’t want a repeat. I have the impression from this and other forums, the later engines are generally more reliable, so it’s probably a better bet in long term longevity It’s possible to find very low mileage Diavel engines as the development of these bikes was behind the MTS. While the DVT replaced the twin spark motor on the MTS from 2014, it was still being fitted to the Diavel in 2017. With all the mods now done, I hope to get the engine back in the next few weeks and fired up . Then it’s a mega clean, repair and replace exercise as it goes back together, before my shiny black engined MTS hits the road :>)
