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Author Topic: Is my cam tensioner too far gone?  (Read 4010 times)

Offline SteveW

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Is my cam tensioner too far gone?
« on: February 11, 2024, 04:43:41 PM »
I have a few hair line cracks but only at each end, should I replace?

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1974 CB550 K0 (with a 650 cam)
1980 CB650
2000 CBR929RR Fireblade
1966 Lambretta LI150 Series 3
1981 RD350LC
1972 Raleigh Chopper
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Offline Laverda Dave

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Re: Is my cam tensioner too far gone?
« Reply #1 on: February 11, 2024, 05:21:52 PM »
If it was mine and the engine was that far apart I would change it. Hairline cracks indicate it is about to break up. Think about hairline cracks on a cam belt in a car engine, it would be considered to be overdue for a replacement. You don't want to reassemble the engine only to have the tensioner break up at speed.
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Offline McCabe-Thiele (Ted)

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Re: Is my cam tensioner too far gone?
« Reply #2 on: February 11, 2024, 06:34:29 PM »
I agree with Dave yes it's another expense but you get peace of mind.👍
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Offline davidcumbria

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Re: Is my cam tensioner too far gone?
« Reply #3 on: February 11, 2024, 06:35:42 PM »
Mine was like that and I replaced the blade with an aftermarket one from Cms. It seemed to have  less spring than the one I took out so I would go for an oem replacement if I were you.
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500/4 in 79. No bikes for 30 years. 750/4 in 2013, 550/4 in 2023. Also own  R1100GS, RD350LC YPVS , Yamaha fazer 600, Yamaha XT250, BmwR80 , HondaVT1300, Royal Alloy GT125.

Offline SteveW

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Re: Is my cam tensioner too far gone?
« Reply #4 on: February 11, 2024, 08:29:08 PM »
Silvers has the entire assembly for £170 ish, Wemoto has just the blade part which is all I need for £45.
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1974 CB550 K0 (with a 650 cam)
1980 CB650
2000 CBR929RR Fireblade
1966 Lambretta LI150 Series 3
1981 RD350LC
1972 Raleigh Chopper
1974 Raleigh Tomahawk
2011 Henry Hoover

Offline davidcumbria

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Re: Is my cam tensioner too far gone?
« Reply #5 on: February 11, 2024, 10:06:00 PM »
At that price it’s probably aftermarket. Cms has the original blade for £91 and aftermarket for £34. I cheaped out but then wished I hadn’t.
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500/4 in 79. No bikes for 30 years. 750/4 in 2013, 550/4 in 2023. Also own  R1100GS, RD350LC YPVS , Yamaha fazer 600, Yamaha XT250, BmwR80 , HondaVT1300, Royal Alloy GT125.
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