Author Topic: 350f cam chain: what is it supposed to sound like?  (Read 3491 times)

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Offline Dos

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Re: 350f cam chain: what is it supposed to sound like?
« Reply #25 on: November 17, 2016, 11:34:48 AM »
I'll check for loose tappets but this sounds very chain like.


Offline markreimer

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Re: 350f cam chain: what is it supposed to sound like?
« Reply #26 on: January 23, 2017, 11:36:06 AM »
Hey just thought I'd share this: my 350F had a very noisy cam chain as I mentioned earlier. Well since I posted that comment I rebuilt the top end of the engine. While doing so, I discovered the tensioner mechanism was seized and not taking up any slack when I loosened the tensioner adjuster bolt at the lower front engine case. A soak with penetrating oil and some gentle pressure, it freed up. Now it's nice and snappy. When I fired up the bike the cam chain rattle was gone. Totally. It's quiet and smooth sounding. Might be worth checking into


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Offline hoodellyhoo

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Re: 350f cam chain: what is it supposed to sound like?
« Reply #27 on: January 26, 2017, 10:22:09 AM »
Whenever I finally get my 350 back together I'm going to make a video about how to execute the "screwdriver" method of adjusting the cam chain just so people can at least hear the difference between a lose and adjusted cam chain. When I first got my bike running I probably put 2000 miles on it with a lose cam chain simply because I didn't know any better. I had no idea how these engines were supposed to sound. It finally started to get worse and worse so much that during one wrenching session I gave the adjuster one final good "heave" and un-stuck the horseshoe which allowed me to finally properly tension the cam chain. Was amazed at how quiet the engine was after that considering the "chain over the edge of a table" sound I was so used to.
1972 CB350F (Back from the Dead!)- http://forums.sohc4.net/index.php?topic=20822.0
1965? S65 - Coming Eventually!
1972 CB750K2 (father-son project)
1976 CB750K6- (sold) http://forums.sohc4.net/index.php?topic=96859.0
1976 CB750K6 (sold)- http://forums.sohc4.net/index.php?topic=62569.0

Offline Dos

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Re: 350f cam chain: what is it supposed to sound like?
« Reply #28 on: January 27, 2017, 07:52:51 AM »
Whenever I finally get my 350 back together I'm going to make a video about how to execute the "screwdriver" method of adjusting the cam chain just so people can at least hear the difference between a lose and adjusted cam chain. When I first got my bike running I probably put 2000 miles on it with a lose cam chain simply because I didn't know any better. I had no idea how these engines were supposed to sound. It finally started to get worse and worse so much that during one wrenching session I gave the adjuster one final good "heave" and un-stuck the horseshoe which allowed me to finally properly tension the cam chain. Was amazed at how quiet the engine was after that considering the "chain over the edge of a table" sound I was so used to.

That sounds like an awesome idea. A lot of people have this issue with their cb350f's including myself. Please post the vid here when it's done!
thanks!

Offline Trevor from Warragul

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1971 Kawasaki H1A
1972 Honda CB350F
1976 Moto Morini 3 1/2 Sport
1978 Honda CBX
1997 Suzuki Bandit 1200
1999 Ducati Monster 750

Offline hoodellyhoo

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Re: 350f cam chain: what is it supposed to sound like?
« Reply #30 on: January 27, 2017, 02:49:20 PM »
That sounds like an awesome idea. A lot of people have this issue with their cb350f's including myself. Please post the vid here when it's done!
thanks!

Yeah it is a great idea isn't it! Too bad I made the bone-headed decision to tear apart my motor before making such a video :o Dang thing has been apart for almost 6 years now and every year I tell myself I'm going to finally buckle down and button it back up. Someday this old lump will scream again...



1972 CB350F (Back from the Dead!)- http://forums.sohc4.net/index.php?topic=20822.0
1965? S65 - Coming Eventually!
1972 CB750K2 (father-son project)
1976 CB750K6- (sold) http://forums.sohc4.net/index.php?topic=96859.0
1976 CB750K6 (sold)- http://forums.sohc4.net/index.php?topic=62569.0

Offline hoodellyhoo

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Re: 350f cam chain: what is it supposed to sound like?
« Reply #31 on: January 27, 2017, 02:53:10 PM »
http://japan.webike.net/products/21955541.html

Very cool! I know I've read about people making similar devices themselves but that looks very well made and priced well.
1972 CB350F (Back from the Dead!)- http://forums.sohc4.net/index.php?topic=20822.0
1965? S65 - Coming Eventually!
1972 CB750K2 (father-son project)
1976 CB750K6- (sold) http://forums.sohc4.net/index.php?topic=96859.0
1976 CB750K6 (sold)- http://forums.sohc4.net/index.php?topic=62569.0

Offline markreimer

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Re: 350f cam chain: what is it supposed to sound like?
« Reply #32 on: January 27, 2017, 07:14:32 PM »
I've got a video of my 350 running after I rebuilt it in December and tensioned the chain. I'll dig it up


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Offline strynboen

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    • http://forums.sohc4.net/index.php?PHPSESSID=eunkchvuee6jacpvofms2pcqf2&/topic,60973.0.html
Re: 350f cam chain: what is it supposed to sound like?
« Reply #33 on: January 28, 2017, 02:22:57 AM »
here is mine 400 four..i have thanged cylenders pistons..but have still some rattel..think i need to thange the big intern thain too..
i kan not speak english/but trying!!
http://forums.sohc4.net/index.php?topic=60973.0
http://forums.sohc4.net/index.php?topic=144758.0
i hate all this v-w.... vords