1971 tr6r blackout - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 7 (permalink) Old 10-19-2019, 02:30 AM Thread Starter
Grand Prix 125
Main Motorcycle: 1971 Triumph TR6R 650cc
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1971 tr6r blackout

Picked up from a bike shop in Los Angeles in poor condition trucked it down to San Diego and have revamped most of it; waiting on the top end from the machine shop. Had it running briefly before it started burning oil due to scoring in cylinder one. 9.5:1 .060 over rebore is soon to be assembled.
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post #2 of 7 (permalink) Old 10-19-2019, 02:46 AM Thread Starter
Grand Prix 125
Main Motorcycle: 1971 Triumph TR6R 650cc
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pictures from when the bike was purchased in Los Angeles. Not so clean... AND not running.
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post #3 of 7 (permalink) Old 10-20-2019, 10:56 AM
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That should be a real nice "before & after" photo!

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post #4 of 7 (permalink) Old 10-20-2019, 02:25 PM Thread Starter
Grand Prix 125
Main Motorcycle: 1971 Triumph TR6R 650cc
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Quote:
Originally Posted by GrandPaulZ View Post
That should be a real nice "before & after" photo!
Thanks GrandPaulZ. Its definitely not a period correct resto obviously but I think it will at least not be burning white oil smoke out the drive cylinder. And, yes I will next month possibly have a b4>after photo or mp4.
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post #5 of 7 (permalink) Old 10-20-2019, 02:33 PM Thread Starter
Grand Prix 125
Main Motorcycle: 1971 Triumph TR6R 650cc
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Diagnostic 101... what works. what doesn't. Finally resolved the always on brake switch issue after much confusion. The tr6r now has functional lighting (until one of the bullet connectors comes loose on the road.) How cool it would be to convert the entire loom to Deutch Pin water proof connectors.
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post #6 of 7 (permalink) Old 10-20-2019, 03:59 PM
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Hi,

Quote:
Originally Posted by Orbweaver88 View Post
until one of the bullet connectors comes loose on the road
Curious, I always use standard 3/16" OD bullets, never a problem in over thirty years. "Diagnostic 101":-

. New bullet terminals like this:-



... are sized for metric strands (0.3 mm. OD); otoh, original Lucas/Triumph strands are a slightly-smaller (0.274 mm. OD) No.32 (British) Standard Wire Gauge; collectively in a wire, it means a 'metric' bullet doesn't grip original strands as well.

. New bullet terminals like this:-



... used by pattern part makers - are commonly 3.9 mm. OD; as I say, original bullets and snap connectors are a nominal 3/16" (4.7 mm.) OD and ID respectively ...

. The steel sleeve inside some old snap connectors can split lengthways, especially if it's squashed around a 3.9 mm. OD bullet ... the insulation holds the split sleeve together but the sleeve doesn't grip the bullets in each end as well. Any doubt about old snap connectors, just replace 'em.

Quote:
Originally Posted by Orbweaver88 View Post
How cool it would be to convert the entire loom to Deutch Pin water proof connectors.
Mmmm ... about '73, Lucas had this brilliant idea they'd use something similar - AMP connectors. In reality, absolute disaster, because there wasn't any way of tightening the sockets once they'd been 'sprung' being fitted over the pins. Lucas reverted to bullets and snap connectors a few years later; as I say, I've used the latter for over thirty years without any problems.

Hth.

Regards,

Stuart
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post #7 of 7 (permalink) Old 10-20-2019, 08:59 PM Thread Starter
Grand Prix 125
Main Motorcycle: 1971 Triumph TR6R 650cc
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Well, I just wouldn't be surprised, being that my bike is haunted.
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