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Project 72 Honda SL125

Discussion in 'Other Projects - Other Bikes (non 250's)' started by Andych, Jun 28, 2020.

  1. risky

    risky risky

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    my upholsterer charges me almost that to supply and fit the vynil
     
  2. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

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    My Bike:
    1987 Yamaha SRX250, Honda 1974 SL125 K1, 2022 Triumph Tiger Sport 660
    Update time... so, One of the frames was a write-off... welded up and twisted.
    When I started cutting it up to try and get the swing arm out (still havent managed that) one of the front fame rails sprung a full 25mm when cut through.. anyway. Engine and all the useable bits were packed onto the shelves last weekend.
    UNADJUSTEDNONRAW_thumb_13da.jpg
    UNADJUSTEDNONRAW_thumb_13d7.jpg

    Today I decided to pull the good one apart so I can get the frame blasted etc and have one set of fork legs chromed and straightened..
    It all came apart quite easy compared to the other one.. although I find that I need to do a little bit on the frame.
    The rear hoop has been bent upwards by around 30mm which makes it so the new seat wont fit.
    Plenty of heat and a large bar should resolve the issue I think.

    Here are the frames (well what is left of one) side by side. The top one is the cut up frame (but the seat fits perfectly).

    UNADJUSTEDNONRAW_thumb_13db.jpg
    UNADJUSTEDNONRAW_thumb_13dc.jpg
    UNADJUSTEDNONRAW_thumb_13dd.jpg
    I am not really sure how you manage to bend that rear hood up like that.. lol

    I also grabbed an Aerosol Can of DNA Custom Paints Silver Flare base coat to test out for colour matching...
    A very quick sand on one of the tanks and a bit of undercoat... then one coat of Silver Flare..

    UNADJUSTEDNONRAW_thumb_13e3.jpg

    You can see the original colour at the lower rear of the tank...
    UNADJUSTEDNONRAW_thumb_13e2.jpg

    About 10 minutes later another coat.. this time trying to match up and blend with the original colour.
    UNADJUSTEDNONRAW_thumb_13e4.jpg UNADJUSTEDNONRAW_thumb_13e5.jpg

    Looks to be close enough for me..

    Last thing I found.. when I went to pack up all the bits I grabbed the exhaust and found the head end to be severely restricted...
    UNADJUSTEDNONRAW_thumb_13df.jpg
    UNADJUSTEDNONRAW_thumb_13e0.jpg
    UNADJUSTEDNONRAW_thumb_13e1.jpg
    It should just have the 2 split collars like all Honda's.. the poor engine would have not had any power at all... so it will be interesting when I pull the engine down.
     
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  3. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    1937 Royal Enfield 250, CF Moto 250 V5, Honda's XL250, CBR250, FT500 plus a few others.
    Never seen a piece like that in an SL pipe.
     
  4. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

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    Had me beat too... maybe they did that to counter not having the spark arrester in the Muffler.
     
  5. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

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    My Bike:
    1987 Yamaha SRX250, Honda 1974 SL125 K1, 2022 Triumph Tiger Sport 660
    I decided to strip the forks today so I can get the inners re-chromed... should be nice and easy... HA.
    AS with most of this bike.. somebody has been there before... slipped the dust covers off and there are bits of twisted rag underneath to soak up the oil leaks...lol
    Then I find that the capscrew's have already been butchered.. so time to break out the drill... and then it is all cleaning and more cleaning...
    Finally got them all apart and clean.. well mostly clean.
    The lowers will need a good sanding and then paint.. or possibly polishing (probably paint).
    the fork tubes will be dropped off to A1 Hardchrome in Lidcombe for re-chroming and straightening.. (of course they were bent... why would they be straight) and I will check for local seals and new capscrews and washers (yep, they werent there).

    This is how they looked before starting
    UNADJUSTEDNONRAW_thumb_13e6.jpg
    UNADJUSTEDNONRAW_thumb_13e7.jpg

    And after a couple of hours...
    UNADJUSTEDNONRAW_thumb_13e8.jpg
    UNADJUSTEDNONRAW_thumb_13e9.jpg
    UNADJUSTEDNONRAW_thumb_13ea.jpg

    The remains of the capscrews...
    UNADJUSTEDNONRAW_thumb_13eb.jpg

    I will probably drop the frame and swing arm in to be blasted and powder coated this week as well.. if I can get the swing arm bushed out.. depends on how cold it will be in the evenings.
     
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  6. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    I left the swingarm bushes in mine, just a large washer each side with a bolt/nut to hold them in.
     
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  7. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

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    My Bike:
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    Picked up my re-chromed for inners today... much better than when I took them down to the Hard Chromer...

    UNADJUSTEDNONRAW_thumb_13ec.jpg

    Plus my Weight Saving (plastic) Indicators (or Winkers as they call them) arrived from Thailand.
    UNADJUSTEDNONRAW_thumb_13ed.jpg
     
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  8. risky

    risky risky

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    how did your chromework on the tubes compare in cost to radchrome in qld?
     
  9. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

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    Rad Chrome quoted $380 plus straightening, plus postage / freight.
    A1 were $350 all up.
    I had a good check today and there is a minor ridge on one leg but it is in the area under the headlight ears so it isn’t an issue.
    I will probably get the CB400 forks done at Rad when I get around to it, if I can’t buy new inners.


    Sent from my iPhone using Tapatalk Pro
     
  10. risky

    risky risky

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    try to see if omar can source a set of copies.i am very happy with what he got me for the 750.
     
  11. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

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    The ones he got for the FZR forks were good too.


    Sent from my iPhone using Tapatalk Pro
     
  12. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

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    My Bike:
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    Fork lowers all cleaned up, sanded and painted... I used the last of my Diamond Clear coat on them.
    Just waiting on the seals to turn up and I can get them assembled.
    UNADJUSTEDNONRAW_thumb_13ee.jpg
    UNADJUSTEDNONRAW_thumb_13ef.jpg UNADJUSTEDNONRAW_thumb_13f0.jpg
    UNADJUSTEDNONRAW_thumb_13f1.jpg

    I went to start pulling one of the engines down to see what it was like inside... mad these poor little bikes were butchered... check out the screw heads. JIS Screwdriver managed to work on all bar 1 on the generator cover so I cant drop the cam chain off till I manage to massage that one out... Cam chain has plenty of slack in it so I am expecting the internal to not have been treated to nicely... lol
    That will be another weekend...sometime in the near future.
    UNADJUSTEDNONRAW_thumb_13f2.jpg
    UNADJUSTEDNONRAW_thumb_13f3.jpg
    UNADJUSTEDNONRAW_thumb_13f4.jpg

    Frame is now all fixed, welded, rear straightened out so the seat fits and should go off to be blasted and powder coated this week... depending on how busy work is..
     
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  13. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

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    Dropped my frame around to the Powder Coater yesterday only to be told he cant do it for up to 3 months.. he has a big contract of some sort... so I went across the road to the guy that does his blasting.. it will be blasted this week and I will then hit it with some etch primer to protect the bare metal. I will then have a good look and fix anything that still needs to be fixed and then hit it with Eastwoods 2K Satin Black Chassis paint.
    Same will happen with the swing arm and other bits an pieces.. I can fit them into my blast cabinet so they can all be done and prepped before I even think about laying on the Satin Black.
     
  14. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

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    My Bike:
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    Went to reassemble the SL125 front forks.. 1st one goes together easy... there really isnt much to them.
    then on to the 2nd one... not quite so smoothly.
    Seems mr A1 Hard Chrome didnt finish grind quite enough right down the bottom so I had to spend about an hour hand linishing with fine emery cloth till I got to the correct finished dimension.... Note to Self.. next time use RAD in Qld.
    All together now with all new seals etc. Springs were spot on spec so one part down.
    I wanted to check out the engine so drained what little oil was in there and started to pull it down... it has been apart before... that much is obvious.
    The cam chain is stretched and given the sparkles in the goop that was in the centrifugal filter it has been grinding away on the side of the case.. so the rest of the internal will be interesting.
    It had obviously been sitting for a while looking at the bore...I am not that sure that this barrel / liner will be able to be saved... unless I go the whole hog and take it out to 3mm OS... lol. A decision for a later date.
    A few pics to go along with the words.

    Forks done... Tick
    UNADJUSTEDNONRAW_thumb_1409.jpg

    Nasty looking sparkly sludge from the Centrifugal filter
    UNADJUSTEDNONRAW_thumb_1400.jpg
    UNADJUSTEDNONRAW_thumb_1401.jpg
    I need to find a special tool for this nut... grrrr
    UNADJUSTEDNONRAW_thumb_1402.jpg
    The bore is a bit average...
    UNADJUSTEDNONRAW_thumb_1403.jpg
    UNADJUSTEDNONRAW_thumb_1404.jpg

    I like the method of retention here...
    UNADJUSTEDNONRAW_thumb_1406.jpg
    UNADJUSTEDNONRAW_thumb_1407.jpg
    You can see where the sparkly aluminium came from... nice cam chain rubbing.
    UNADJUSTEDNONRAW_thumb_1408.jpg
     
  15. Allan

    Allan Well-Known Member

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    I was given a CB100 a few year ago with a hole right through where you have a slight rub mark from a sloppy cam chain.. I filled it with Araldite and it performed faultlessly for a couple of years before I sold it.
     
  16. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

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    They are tough little blighters
     
  17. kiffsta

    kiffsta Senior Member

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    Those forks look mint , well done

    love seeing these old girls come back to life
     
  18. Allan

    Allan Well-Known Member

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    Yes, my SL125 survived being stroked to 145cc, then bored to 175cc, fitted with a hot cam and run on alcohol at about 13:1 compression.
     
  19. Andych

    Andych Moderator Staff Member Premium Member Contributing Member Dirty Wheel Club

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    Haha, not sure I will go quite that far


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  20. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    My Aussie mate tells me they have a mega CNC centreless grinder that is insanely accurate.
     

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