A wee Matchless project

  1. ronan

    ronan Member

    Messages:
    8,374
    dublin
    I remember seeing the likes of BSA bantams advertised for £500 and thinking the seller was high on paint fumes, they go for multiples of that now :confused:
     
  2. brightspark

    brightspark Member

    Messages:
    25,935
    Location:
    yarm
    bought my 1st banty for 10 quid then bought a greeves Scottish for 15 quid then an ajs for 30 quid and a 650 Norton ss for 40 quid :)still got that after 45 years :)
     
    Rannsachair and ronan like this.
  3. mechman Member

    Messages:
    1,607
    Location:
    great britain n.e.lincs
    I was given my first bike, 1938 speed twin in bits and kind of sorted it back in the day (there was no warranty with it)
     
  4. ronan

    ronan Member

    Messages:
    8,374
    dublin
    Worth a bomb these days, around the 10-15k mark if I'm not mistaken.
     
  5. Rannsachair

    Rannsachair Forum Supporter

    Messages:
    976
    Location:
    Lochgilphead, Argyll, Scotland
    Casings back from aqua blasting:

    [​IMG]
    Corrosion on timing side crankcase worse than I thought:
    [​IMG]
    It is holed and so thin you can deflect the weak area with finger pressure.

    I can get a second hand set of cases for £60 or do I get welded? or try a lumiweld type repair as i suggested earlier? One of the main frame mountings is at this point so will be held in compression at the repair, not so keen on an epoxy or lumiweld repair in case it will delaminate due to vibration?

    Cox and Turner just emailed that the barrel is resleeved and bored to suit a standard wire wound piston with just over .001" clearance.
     
    ronan likes this.
  6. Pigeon_Droppings2 Member

    Messages:
    1,578
    Location:
    london
    I've used the aluminum brazing sticks and they work very well I think...I actually used it to make a new lug for a water pump which has held up well for the last 5 years. You can make formers out of steel because it doesn't stick to steel.
     
  7. ronan

    ronan Member

    Messages:
    8,374
    dublin
    I'd just go for a new set as you said, rather than mess around with lumiweld to save 60 notes. The aquablasting is a good job, was it expensive ?
     
    slim_boy_fat likes this.
  8. Rannsachair

    Rannsachair Forum Supporter

    Messages:
    976
    Location:
    Lochgilphead, Argyll, Scotland
    Am thinking the same, can get Matchless ones so it goes faster :cool: these bits and a Saab v4 twin choke inlet manifold were £140, was quoted £120 from a photo, but the head was really dirty and painted black.
     
    slim_boy_fat and ronan like this.
  9. gordon stephenson

    gordon stephenson Forum Supporter

    Messages:
    6,278
    Location:
    Skelton in Cleveland U.K.
    I had a 500cc Matchless G80CS, with a wire wound piston, The whole bottom skirt detached one day. Bike was still running when my mate pointed to the clouds of blue smoke coming from the exhaust pipe. Stopped the engine and it wouldn't start again, Found the damage on stripping the barrel off,
     
    Rannsachair and slim_boy_fat like this.
  10. Rannsachair

    Rannsachair Forum Supporter

    Messages:
    976
    Location:
    Lochgilphead, Argyll, Scotland
    £60 crankcases arrived today, look to be good and unlike the 1952 AJS M18 cases are marked 1955 G3LS, which given I am putting the 500 engine into my 1955 Matchless model G3LS seems more fitting as I want to rebuild the original engine.

    The cam followers and bushes are also in much better conditions. so appears to be a win.

    [​IMG]
     
    slim_boy_fat and ronan like this.
  11. slim_boy_fat

    slim_boy_fat Forum Supporter

    ^^ That's not a crack below the 55? Hope it's just a casting line.
     
  12. Rannsachair

    Rannsachair Forum Supporter

    Messages:
    976
    Location:
    Lochgilphead, Argyll, Scotland
    Just a proud mark on the casting, no cracks.....
     
    slim_boy_fat likes this.
  13. slim_boy_fat

    slim_boy_fat Forum Supporter

    :thumbup:
     
  14. Seadog

    Seadog Forum Supporter

    Messages:
    4,091
    Location:
    NE London - UK

    That was the standard way of stamping the crankcases. It's an oblique separating the date and model numbers.
     
  15. slim_boy_fat

    slim_boy_fat Forum Supporter

    Not that one, I meant the slightly wavy line running from the top left bolt/stud hole down to the centre bore.
    @Rannsachair has confirmed it's a casting 'flaw'. :thumbup:
     
  16. Seadog

    Seadog Forum Supporter

    Messages:
    4,091
    Location:
    NE London - UK
    That just looks like a score line to me.
     
    slim_boy_fat likes this.
  17. Rannsachair

    Rannsachair Forum Supporter

    Messages:
    976
    Location:
    Lochgilphead, Argyll, Scotland
    Barrel back from Cox and Turner - broken fin repaired, cylinder liner fitted, bored and honed:

    [​IMG]

    [​IMG]
    And new rings made to match original wire bound piston, with reduced bore clearance to standard pistons:
    [​IMG]
     
    Last edited: Jul 9, 2018
    Seadog, ronan and slim_boy_fat like this.
  18. Rannsachair

    Rannsachair Forum Supporter

    Messages:
    976
    Location:
    Lochgilphead, Argyll, Scotland
    i may have a slight change in plans, I seem to have acquired most of yet another 500cc Matchless engine bar barrel piston and head, i suppose you cannot have too many spare engines :rolleyes:

    its a 1951 G80 Matchless 500:

    [​IMG]
    [​IMG]
    Today I received a very cheap 500 barrel that I had taken a punt on:
    one fin repair, looks reasonably well done and some surface corrosion on bore, there is a plus .020 painted on it too:
    [​IMG]
    [​IMG]
    A quick run through with:
    [​IMG]
    And measures as if its done no miles since it was rebored +.020
    [​IMG]

    I also picked up a set of high lift HS scrambler cams:
    [​IMG]
     
    ronan and Seadog like this.
  19. ronan

    ronan Member

    Messages:
    8,374
    dublin
    Under rated bike the matchless, like ariel. Its no harm to have an engine ready to go, sitting on the shelf.
     
    Rannsachair likes this.
  20. Seadog

    Seadog Forum Supporter

    Messages:
    4,091
    Location:
    NE London - UK
    I had the SH cams in my 18s together with a 9:1 piston. It pulled noticeably at 80 and could be persuaded to go to around 90/95 if I recall. I didn't bother with a fancy exhaust or tuning the inlet and it had standard gearing.
     
    Rannsachair likes this.
Advertisements