peterdallan
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Age: 50
Location: London, UK
Posts: 74
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« Reply #15 on: May 20, 2012, 01:01:34 PM » |
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Sorry for the long delay between posts, the shop has been super busy, but back on track for BUB.
Because we are using a swinging arm box instead of a rigid box we had to move the mounts that are fitted to the pre-unit frame and make some new ones. As per the swinging arm mounts on pre-units, Dick turned the mounts on the lathe and clamped the gearbox shell to the engine mounts. Measured several times, and after steadily increasing the drill size, I guess about 5 times, we finally drilled the 3/4" hole for the new mounts. With the box clamped in place Dick tacked them up and we then removed the box and replaced it with a 7/16th rod which was turned to size and threaded at each end. Once in place the welds were finished, and the fit is perfect.
Dick is fitting a 5 speed cluster into the box for added flexibility on the salt. New engine plates will be made on Monday, the main frame fab is finished and engine and gearbox build can begin in earnest.
More very soon I hope
Peter
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peterdallan
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Location: London, UK
Posts: 74
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« Reply #16 on: May 27, 2012, 12:13:06 PM » |
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On closer inspection the frame was not straight, and trying to straighten it meant everything else went out.
Fortunately we had another frame in stock, a duplex pre-unit.
Oil tank made by Dick from Barons Speed Shop with nice scallops for the GP carbs, and all tabs and mounts done. Started with card cut to shape.
2 rubber mounted at the top, and a double mount underneath.
And how it stands right now.
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Old Scrambler
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Age: 66
Location: Cascade, WI
Posts: 241
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« Reply #17 on: May 30, 2012, 09:02:30 PM » |
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Good choice to go to the 2nd frame.........the first one looked as if it would fold under its own weight! If your plan is to run on the salt, remember that the air is thin and air-speed in the time-trap will tend to SUCK air from your stacks.
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2011 AMA LSR M-PG/250cc TRIUMPH Cub
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peterdallan
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Location: London, UK
Posts: 74
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« Reply #18 on: May 31, 2012, 03:20:16 AM » |
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Can you expand a bit on your statement about the air being sucked out? Is this something that affects all carburettor bikes on the salt or are you saying our design around the carbs might be suspect?
thanks for the interest
cheers
Peter
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peterdallan
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« Reply #19 on: June 26, 2012, 04:46:19 PM » |
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Some good progress, in pictures
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peterdallan
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« Reply #20 on: June 26, 2012, 04:47:43 PM » |
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more, catch tank fab, tank mounts
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peterdallan
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Location: London, UK
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« Reply #21 on: June 26, 2012, 04:50:27 PM » |
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more, carb and float chamber mount made, fork stop made and tacked on, forks cut to size, junior speedway hub and akront rim at hagon's being laced up, back this week
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Mossy
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Location: Pt Augusta, South Australia
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« Reply #22 on: July 10, 2012, 05:35:42 PM » |
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G'day Pete looking very good. I got my bike running in time for Speedweek in March only to have it postponed due to wet weather. Re-programmed for the end of May, only to be cancelled again due to soft salt  Have had a couple of runs at Tailem Bend test track which was useful as it showed up some faults that weren't obvious when sitting on the bike in the shed. Cheers Mossy |
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peterdallan
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« Reply #23 on: July 11, 2012, 07:41:35 AM » |
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Should have some more shots to post in the next few days. As you say a bit of testing before she goes will work wonders in ironing out any problems, rather do that here than on the salt if possible.
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peterdallan
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« Reply #24 on: July 11, 2012, 08:07:58 AM » |
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Just found some photos I had not yet posted. Frame fab finished and powdercoated.   |
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peterdallan
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« Reply #25 on: July 11, 2012, 08:11:01 AM » |
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Seat base made   |
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