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Featured 2012 First Generation Multistrada 1200 S Touring Refresh

Discussion in 'Builds & Projects' started by Android853sp, Jan 13, 2020.

  1. As previously posted, I decided to have an engine rebuild when it was found that the bike had low compression in the horizontal cylinder instead of bailing out and buying a new (to me) bike.

    I have owned the bike from new and apart from removing the catalytic converter, fitting a Leo Vince exhaust system and having a generic, static ECU remap, the bike is standard.

    The bike was dropped off at Moto Rapido last week and today I was able to pick up and inspect the engine components after the engine was fully disassembled.

    The good news is, that apart from the horizontal cylinder bore/ring gap being oversize as expected, there are no signs of major wear on any of the components.

    In the gearbox, one selector fork has a small polished area and the selector drum has a noticeable witness mark where the gear indicator switch locates which looks as though it might have worn through the anodising.

    Heads have cleaned up and show minimal signs if wear although the valve seat/valve contact patch is quite wide and polished. For a stock item, both inlet and exhaust ports look remarkably smooth.

    Casualties were limited to one horizontal cylinder head exhaust stud snapped proud of the head (few !) and the horizontal cylinder cam cover will be consigned to the bin as it has been peppered with crap and looks like the surface of the moon. Luckily, the swing arm bolt and the rear shock lower fixing bolt came out without problem.

    My goal is to rebuild for reliability and longevity so the work I have currently agreed to is :
    Machine and re-plate both cylinders which will carried out by Langcourt.
    Fit new pistons and rings.
    Fit new con rod small end bushes, big end shells and con rod bolts. The crank pins look unmarked and are well within spec.
    Dynamically balance the crankshaft which will be carried out by Owslebury Crankshaft Services. The same guys balanced my 853 crank to 0.0/0.5gm.
    Replace the Selector drum and the one worn selector fork.
    Replace the main bearings and all the other bearings in the cases.
    Fit new mobile and fixed belt tensioners. (Only because the new generation of belt tensioners are sealed for life unlike the 916/748 ect bearings which can be replaced)
    Super finish all gears including the timing gears.
    Heads overhaul that will include a little bit of port polishing and new valve stem seals. The valve guides and cams show very little signs of wear.
    The only work I’m undecided about is recutting the valve seats and lapping in new valves but I’m open to persuasion.
    After the build is finished, the bike will be run in on the dyno and get a dynamic ecu map to suit the new Arrow exhaust.

    Separately, I’m taking the swing arm and centre stand down to Steve Turner to get them blasted, anodised and powder coated. As the swing arm bearings have to be removed for powder coating, they will be replaced as well.

    That is where I am at today, photographs and progress to follow, as and when it happens.

    Andy
     
    #1 Android853sp, Jan 13, 2020
    Last edited: Jan 13, 2020
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  2. I've just stripped down my multistrada 2011 1200s after there was a strange rattle which I could not locate and came across a main bearing with one of the balls hard coating come off after going further and further into the engine to locate the source of the intermittent rattle / noise. I would replace the mains if I was down that far even if they cost around £160 the pair. My Multi has done 38000 miles only other concern was a worn bottom timing wheel shaft bearing . Expensive job but cheaper than an engine breaking and the mains do have some bad history. Brilliant bikes but they do take some looking after!
     
  3. So, a few pictures. A detail of the horizontal head exhaust manifold in all its corroded glory.
    View attachment 184180
    Followed by a detail of the vertical head exhaust manifold.
    View attachment 184192
    Next is an attempt to show the groove worn on the selector drum by the gear selector indicator shaft.
    20200128_135328.jpg
    The next are the worst bits of corrosion on the cases.
    20200128_135229.jpg
    20200128_135239.jpg
    20200128_135346.jpg
    Heads cleaned up nicely.
    20200128_135204.jpg
    20200128_135209.jpg
    Pistons cleaned up too
    20200128_135249.jpg
    Gear cluster looks okay too
    20200128_135400.jpg
    Both barrels and new pistons have gone to Langcourt who should turn the parts around in about a week. Also decided to get the cases vapour blasted and 'finish coated' although I have yet to discuss with the vapour blasters just what the finish coating should be. I think they offer Cerakote. Andy
     
    #3 Android853sp, Jan 28, 2020
    Last edited: Jan 28, 2020
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  4. Second go !
    20200128_135500.jpg
    20200128_135509.jpg
    Andy
     
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  5. Looking good Andy. :upyeah:
     
  6. Following with interest. I love my multi first gen....
     
  7. A bit of Steve Turner magic collected today.
    20200206_143638.jpg 20200206_143916.jpg 20200206_143934.jpg 20200206_143803.jpg 20200206_143704.jpg
    Andy
     
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  8. A bit more progress.
    A bit of port polishing
    20200215_092821.jpg 20200215_093044.jpg
    and a bit of super finishing
    20200215_093224.jpg
    Andy
     
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