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Author Topic: rear disc brakes pre 75  (Read 6723 times)

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Offline jimg1au

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Re: rear disc brakes pre 75
« Reply #15 on: May 30, 2013, 09:46:52 pm »
MICK
enough with the triumph slur or you wont get to ribe the yetman only work on it(not very often as its a triumph)
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Offline matcho mick

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Re: rear disc brakes pre 75
« Reply #16 on: May 30, 2013, 10:03:21 pm »
ff  ffuggg ;D, :P
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work,the curse of the racing class!!
if a hammer dosn't fix it,you have a electrical problem!!

Offline JAP 454

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Re: rear disc brakes pre 75
« Reply #17 on: May 30, 2013, 10:14:39 pm »
Mick, I had an 1971 OIF A65L about 15 years ago, loved the motor, strong as, didn't like the comicals and the rest of the bike, sold it to the late  Darryl Hellyer up Newy way, I wonder what happened to it??
Foss
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Offline Rosco86

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Re: rear disc brakes pre 75
« Reply #18 on: May 31, 2013, 07:30:19 am »
Foss
 thanks for the feedback might look at a cable and double perch setup on clutch side as an alternative. Finding it a pain in the arse, very little room around the rear axle area on the godden. Was setup as a long tracker and converting back to short circuit hasn't been fun. Spend heaps of time and money setting up new braked wheels that only basically get used at scrutineering and in the pits. Oh well back to the drawing board.
Rosco
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Offline firko

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Re: rear disc brakes pre 75
« Reply #19 on: May 31, 2013, 10:11:43 am »
The problem with running a disc in pre 75 dirt track is that the motocross rules are used . It's another example of a rulebook that needs a bit of a revamp. My upcoming '74 Shell 750 Yamaha has an Airheart rear disc and I reckon you should get away with single spot Grimeca, Airheart, Kelsey-Hayes and Girling/Lockheed which were all available prior to '75.
« Last Edit: May 31, 2013, 10:45:42 am by firko »
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'68 Yamaha DT1 enduro, '69 Yamaha 'DT1 from Hell' '69 DT1'Dunger from Hell, '69 Cheney Yamaha 360, 70 Maico 350 (2 off), '68 Hindall Ducati 250, Hindall RT2MX, Hindall YZ250a , Cycle Factory RT2MX flat tracker, Yamaha 1T250J, Maico 250 trials, '71, Boyd and Stellings TM400, Shell OW72,750 Yamaha

Offline hagon_84

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Re: rear disc brakes pre 75
« Reply #20 on: June 01, 2013, 12:40:49 pm »
that was my thoughts firko that i would be ok if its pre75 but like u said they run off motocross rules for braking simplest thing i can come up with is drum front n rear and use in the pits only  ;D
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1977 Hagon rm250b, 1977 yz400d, 1972 gauzonni rm125, 1969 greeves griffon 250, 1973 greeves griffon qub 380, hagon eso 500.

Offline JAP 454

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Re: rear disc brakes pre 75
« Reply #21 on: June 01, 2013, 03:32:06 pm »
84, I use a early DT 175 rear hub with a 19" rim in me Sandracer, light as plus sprockets are easily available, slotted brake plate lines up with the lower shock mount bolt.
Foss
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