Removing the Exhaust Decompression cam - Page 3 - Triumph Forum: Triumph Rat Motorcycle Forums
Thunderbird Twin - Technical Talk Technical talk for the big Thunderbird twin

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post #21 of 37 (permalink) Old 03-03-2019, 05:09 PM
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Glad to hear....well actually not, to hear you have a repair needed....
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post #22 of 37 (permalink) Old 04-20-2019, 12:07 AM
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Interesting. Today I popped the cam cover off to do the 12K mile valve clearance check and was greeted with a sheared off right side decompression mechanism. No idea how long it's been like this since it's the first time the cam cover has been off. Haven't had any trouble starting and no unusual engine noises. I'm trying to decide whether to have the camshaft replaced (trying to get Triumph to pay for it) or just leave it off.
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2013 Blue Marble Haze Thunderbird 1600 ABS
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post #23 of 37 (permalink) Old 04-20-2019, 04:19 AM
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Ouch.....????
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post #24 of 37 (permalink) Old 04-20-2019, 04:30 AM Thread Starter
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Wow!

I'd leave it off mate. I wouldn't go the extra expense to buy new cams etc when you'll have less problems without it.

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post #25 of 37 (permalink) Old 04-21-2019, 08:43 PM
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Looks to me like a failure of the casting...hopefully the big T will cover that....and they should
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post #26 of 37 (permalink) Old 04-21-2019, 09:06 PM
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I wonder how many T birds are like that without the owners realising. Iím pretty sure I heard one go at one time. Guy was starting it and there was a louder than usual crack/thump, but the bike started and ran fine. We looked at each other and shrugged. It was many months later when he was in for valve clearances that the break was noticed.
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post #27 of 37 (permalink) Old 04-21-2019, 10:55 PM
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Quote:
Originally Posted by HomerSimpson View Post
Wow!
I'd leave it off mate. I wouldn't go the extra expense to buy new cams etc when you'll have less problems without it.
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I debated with myself just that for a couple of days but decided to give Triumph a chance to make it right. If it happened again, after that, then I'd leave it off. Seems to be more common with the earlier model years. I spoke with the Service Manager where I bought the Tbird; he said they've done plenty of valve clearance checks and adjustments but have never seen one where the decompressor was sheared off of the camshaft and knew of no service bulletins from Triumph about it. And while I've read of a handful of cases here and other forums (and more than one is still too many), it's a pretty small sample compared to all the TBirds sold.

Still, I'd recommend to anyone who has put off the valve clearance service (every 12K miles), to get it done.

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post #28 of 37 (permalink) Old 05-01-2019, 12:36 AM
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Anxious to hear what Triumph will do......think it's time to order the gasket and take a peak under the valve cover....good advice!
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post #29 of 37 (permalink) Old 05-01-2019, 11:19 PM
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Dealer says it's on the schedule for tomorrow.

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post #30 of 37 (permalink) Old 05-07-2019, 11:42 PM
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Finally heard back from Triumph today and despite the dealer putting in a "good will" warranty claim for a clearly defective camshaft, Triumph denied it. Said the bike was too far out of warranty (it's a 2013). I've sent an appeal, with photos, directly to Triumph USA.

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