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blueflag

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Posts posted by blueflag
 
 
  1. Try Bolton motorcycle club, I did one with them last year at Grimehills. Friendly bunch. Manchester 17 are a decent club but most trials are in Derbyshire. they are running the first Dead easy trial of the year this Saturday near Buxton..

     

  2. It's got an interference fit, chill the liner and warm the hub to get it in. I can't see it getting particularly warm the way I ride! I put a little bit of loctite on the face just as belt and braces. I'm pretty happy with the way it's gone. I need to sort out some shoes, a brake rod and a new lever. Keeps me out of mischief...

    I know the finish has chatter by the way...?

    20180307_200448.jpg

    • Like 1
  3. 18 minutes ago, 2stroke4stroke said:

    I always found it interesting/amusing that other manufacturers used chrome on cylinder bores to reduce friction (as well as increase  bore life) .  Bultaco used it on brake drums...........

    ?????

  4. Trying to find time to make and fit a new drum. Hopefully it'll be done this week. 

    My mate has suggested going hydraulic on the rear, if I can find a suitable slave cylinder I'll have a bash. If I go ahead in the future I'll make a complete new brake plate to save ruining an original Bultaco part. ?

  5. Well, just finished machining the drum, it is indeed a cast - in liner. I've taken it out to the nominal diameter of the aluminium, I'm guessing 144 ish mm. Just got to sleeve the bearing diameter while it's set up and sort out a mild steel sleeve for the drum.

    Slowly getting there!

    20180228_180316.jpg

    • Like 3
  6. Been too busy the last couple of days to make any progress, I'm hoping to try and get the hub bored later on. Another question, I know I'll probably get flayed alive for suggesting it but I've found some cast pipe in a scrap bin, it would only need a lick on the o/d and bore to be spot on for size. It's not cast iron, it's a nickel chrome alloy steel, basically stainless. I'm happy to try it out, thoughts guys? (The only cast iron I have is a huge chunk and it seems a waste)

 
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