RM370 restoration

Discussion in '2 smokers' started by ELSammo, Mar 8, 2015.

  1. ELSammo

    ELSammo Adventurer

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  2. ELSammo

    ELSammo Adventurer

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    Here is my example, reasonably complete but with wrong backing plates and incorrect axles and spacers just so i could wheel it around.

    With a carb clean i got it to fire up but it was rather rattly so only ran it for a short time. Sounded like it will probably kill, or at least maim and disfigure me at the first chance it gets.

    [​IMG]20140213_171058 by EL Sammo, on Flickr
    #2
  3. ELSammo

    ELSammo Adventurer

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    The 370 was stripped and a parts list made of what was needed. Dad seems to be sourcing parts for it reasonably easy.

    [​IMG]19-3-14 by EL Sammo, on Flickr

    New seat cover and foam from the states, original base is getting powdercoated.

    [​IMG]19-5-14 (1) by EL Sammo, on Flickr

    Frame, swingarm and other parts back from powdercoaters, Dad was keen to get a good finish and with helping the powdercoaters with preperatio and matching the factory colour he got offered a part time job working there, he starts next week doing four hours a day.

    new headstem and swingarm bearings fitted up now, should start to look a bit more like a motorcycle soon.

    [​IMG]19-5-14 (2) (1) by EL Sammo, on Flickr
    #3
  4. ELSammo

    ELSammo Adventurer

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    Some more progress, fasteners back from zinc plating. Suspension is being hard chromed and rebuilt and should be installed soon.

    [​IMG]7-6-14 (2) by EL Sammo, on Flickr

    [​IMG]7-6-14 by EL Sammo, on Flickr

    [​IMG]24-1-15 by EL Sammo, on Flickr

    New rims and stainless spokes laced and trued,

    [​IMG]25-1-15 by EL Sammo, on FlickR

    Tyres will be installed this week then we will have a roller. The noise making rotational smokey thing will be the next major part to be restored.
    #4
  5. ELSammo

    ELSammo Adventurer

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    #5
  6. ELSammo

    ELSammo Adventurer

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    [​IMG]001 (3) by EL Sammo, on Flickr



    Some more progress, we have sourced everything needed for the engine rebuild to be started including a new genuine conrod that was quite difficult to find! Luckily from the two bottom ends we had enough for a very good complete gearbox and clutch to be built.

    New cylinder on original bore and genuine piston kit to suit has been sourced. Gaskets, bearings and seals along with a new kickstarter shaft also.

    One gearbox had been previously assembled without a thrust washer and damaged the gearset, a lot of work in restorations is repairing previous owners damage in a lot of cases.

    Cases have been repaired where a chain derailment in the past damaged them, the lower cases will be powdercoated and the cylinder and head high temp painted and oven baked.
    #6
  7. ELSammo

    ELSammo Adventurer

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    [​IMG]003 (1) by EL Sammo, on Flickr

    The fuel tank, extremely light weight alloy item that unfortunatley had sometime in the past had the tunnel spread around 50mm to fit on another bike.

    Unable to be repaired to satisfactory condition while intact the only option was to delicately cut the tank around the seams then straighten both halves with a lot of delicate metal shaping before having the tank rewelded as per original, with some shaping of the welds and seams and repainting along with the stock decals and warning stickers it should look quite nice, good enough for a racebike.
    #7
  8. ELSammo

    ELSammo Adventurer

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    [​IMG]DeCoster1 by EL Sammo, on Flickr



    "Overall there is one big factor, and it is that today a rider can go as fast as he can anywhere on the track and the bike can handle it. In my generation, if I jumped down a drop-off as fast as I could go, I would bend the bike for sure. I would bend the frame, or the forks, or explode the hubs. "

    -The Man, Roger DeCoster
    #8
  9. brucifer

    brucifer Long timer

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    Nice! :thumb
    #9
  10. farmer58ZA

    farmer58ZA Adventurer

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    El Sammo
    Very, very nice bike so far. Are you going to race it? They are one of the easiest MX bikes to ride. Despite being a few cc below the really big open classers they don't give much away in sheer speed. Going fast is a matter of hanging on the cable.

    I had one at age 19. Waay too much bike for me and I spent lots of time in undignified positions, in the air and on the ground. :wink:

    [​IMG]

    Fast forward about 30 years and I got involved in VMX. What better excuse was there to re-create that bike? :

    [​IMG]

    Still every bit as fast and fun as the original bike.

    Regards
    David


    #10
  11. 996DL

    996DL Dunning-Kruger PHD

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    Finally back in paradise...
    :lurk Subscribed...

    Was working at a Suzuki shop, when these bikes hit the market like a sledgehammer. :eek1

    Notable improvements over the TM400 and TM125, I had owned back in those days. :wink: :lol3

    Saw Roger Decoster several times, at the Puyallup Washington rounds, of the Trans-AMA series... :bow

    Few motorcycle companies have hit homeruns as big,
    as Suzuki's introductions of the RM, GS, GSXR series through the years. :thumb

    And the Hayabusa, made a pretty big splash in 1999 as well... :evil :pynd

    996DL
    #11
  12. ELSammo

    ELSammo Adventurer

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    Thanks guys! This thread is a little tricky to update as my dad is doing the restoration in australia while i'm currently over in china.

    Dad raced one back in the 70's and i originally intended to restore the 370 as a present for him but have never had the time.

    Once the bike is finished i will be entering it in some VMX races, Dad assures me that they are a great open class bike and easy to ride if you short shift it and let the motor do the work, guess i will find out!
    #12
  13. ADV8

    ADV8 Long timer

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    I still have the 1976 RM125S ( in box's) I bought new, the RM's were ground breaking for sure.
    Never saw Roger DeCoster race but did see Gaston Rahier when he came down this way. (early 1976 perhaps)

    Great thread. :thumb
    #13
  14. luckychucky

    luckychucky Long timer

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    Nice bike


    Sent from my iPad using Tapatalk
    #14
  15. SuziRider

    SuziRider too many projects

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    Man, what a cool looking bike. And, a proper rebuild.:clap
    #15
  16. ELSammo

    ELSammo Adventurer

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    [​IMG]1-4-15 by EL Sammo, on Flickr

    [​IMG]1-4-15 (2) by EL Sammo, on Flickr





    Some more updates, i got to see the bike in the flesh for the first time it really is a beautiful piece of machinery.

    The crankcases were repaired, the engine mounting points resized and replaced with machined pieces so the engine mounting in the frame is nice and tight to minimise vibration.

    The cases had blanking plates fitted and were then powdercoated.
    #16
  17. ELSammo

    ELSammo Adventurer

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    #17
  18. farmer58ZA

    farmer58ZA Adventurer

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    Very nice!!
    #18
  19. ELSammo

    ELSammo Adventurer

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    #19
  20. ELSammo

    ELSammo Adventurer

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    [​IMG]rm by EL Sammo, on Flickr

    [​IMG]rm2 by EL Sammo, on Flickr

    Bottom end installed in frame, top end ready to be installed next, it should start to look like a motorcycle very soon!
    #20