(ahem).
I think I've busted one or two over the weekend.
Tazzing down the A303 to meet up with some other nutters for a 'big bikes off-roading day' the engine suddenly started making odd noises and then cut out forcing me to the side of the road and entailing an RAC trip.
The engine WILL run, both pistons are firing ok (as far as I can make out), but there's a horrible 'clatter' noise coming from the main body of the engine.
I initially hoped it was just a timing issue (jumped cam-chain for example), but I've looked at the time, rotated the engine slowly, and I've stuck an endoscope down each plug hole (all 4) to see if there's any damage - can't see any and it appears the timing is ok. The valves appear to be fine, there's no debris in the combustion chambers and the piston heads appear to be unmarked. (photos here : https://www.flickr.com/photos/rockburne ... 8578465113 ). (I would have video'd the endoscope view, but for some reason the App has forgotten how to do video...)
Now, however - I think it may be a busted main crank bearing - but not sure how exactly to diagnose that without a full strip down.
If you listen to this video carefully, there's a 'clack' noise that occurs at (I think) roughly the same place on each rotation : https://vimeo.com/210057413 If someone else could confirm I'm hearing 'something' then at least I'll know I'm not going mad.
Next steps are to investigate repair or replacement options for the engine itself, (eg a 2nd hand engine from Motorworks). I'm in the somewhat enviable position of having a good 4 weeks of 'holiday' coming up in April (I just left my current job), but that kinda precludes anything majorly expensive.
Any thoughts/experiences on stripping an R1150 engine to bits?
