Purpose of CCT oil jets? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 9 Old 05-17-2013, 02:24 AM Thread Starter
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Purpose of CCT oil jets?

I did a forum search but found nothing. What purpose do the cam chain timing oil jets serve? I've Googled it but still can't find the info. Holding the adjuster in my hand and inspecting it, it appears that pressurized oil is pushed into the adjusting plunger toward the guide.

'92 Honda Z50R
'94 Kawasaki KLX250 modded to 340cc's
'00 Yamaha YZ426F
'94 Yamaha 125 scooter
'05 Vespa E4 scooter
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post #2 of 9 Old 05-17-2013, 10:28 AM
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They probably pressurize the cam chain tensioner. Most tensioners are hydraulic and pressurized by engine oil. They have a ratcheting mechanism that retains the chain adjustment after you shut down the engine and the oil pressure bleeds off.


Not all adjusters have the ratchet though. My old F800 had no ratchet mechanism so the chain was rattly at first start up during the day.
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post #3 of 9 Old 05-17-2013, 10:43 AM
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Strom cam chain tensioners are strictly mechanical. A light spring applies the pressure rather than oil. I would guess the #8 oil jet next to it is to keep the ratcheting mechanism clean and lubricated.

Pat- 2007 DL650A was ridden to all 48 contiguous states. I didn't quite make it to 17,000 miles on the 2012 DL650A.
Nicknames I use to lessen typing, Vee = 2002-2012 DL1000s. Vee2=2014-2016 DL1000s. Wee = 2004-2011 DL650s. Glee = 2012-2016 DL650s
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post #4 of 9 Old 05-18-2013, 01:27 AM Thread Starter
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Thanks for the replies. I'm having a hard time getting my brain wrapped around this. As I held the tensioner in my hand and inspected it, I could see where oil is fed thru the tensioner body towards the rod/plunger or whatever it is called. Once I re-installed the cams and then the tensioner, the spring pushed the plunger against the guide which tightened the chain fairly snug. I went on to re-check the valve lash and the engine had yet to be started so there was no hydraulic tensioning going on....just tension provided by the spring. Sorry to be stuck on this detail, but I have that drive of needing to know.

'92 Honda Z50R
'94 Kawasaki KLX250 modded to 340cc's
'00 Yamaha YZ426F
'94 Yamaha 125 scooter
'05 Vespa E4 scooter
'68 Vespa VBB scooter (restored)
'06 Wee
'03 Honda S2000 roadster
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post #5 of 9 Old 05-18-2013, 06:42 AM
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While your at it then, maybe you can figure out how Cadbury gets the cream into their Easter cream Eggs? I mean, since you have that "drive of needing to know" kinda' guy.....:biggrinjester:

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post #6 of 9 Old 05-18-2013, 10:05 AM
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GW has the correct info. The spring does not push straight against the plunger. It rotates a screw mechanism that has a one way ratchet. As the guide wears or slack is taken up the plunger extends and the ratchet holds it there. It is easy to install one wrong. The plunger should be retracted, the mechanism installed and the plunger then released. At least on the Hondas I have replaced. Suzuki's tensioner looks the same.

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post #7 of 9 Old 05-20-2013, 05:01 AM Thread Starter
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Quote:
Originally Posted by CanadianFZ6 View Post
While your at it then, maybe you can figure out how Cadbury gets the cream into their Easter cream Eggs? I mean, since you have that "drive of needing to know" kinda' guy.....:biggrinjester:
I'll check with the irs(note; lack of capitalization). They keep these secrets in a vault.

'92 Honda Z50R
'94 Kawasaki KLX250 modded to 340cc's
'00 Yamaha YZ426F
'94 Yamaha 125 scooter
'05 Vespa E4 scooter
'68 Vespa VBB scooter (restored)
'06 Wee
'03 Honda S2000 roadster
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post #8 of 9 Old 05-20-2013, 05:37 AM Thread Starter
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Quote:
Originally Posted by Scott E. Bonds View Post
GW has the correct info. The spring does not push straight against the plunger. It rotates a screw mechanism that has a one way ratchet. As the guide wears or slack is taken up the plunger extends and the ratchet holds it there. It is easy to install one wrong. The plunger should be retracted, the mechanism installed and the plunger then released. At least on the Hondas I have replaced. Suzuki's tensioner looks the same.
Thanks for the description. How does the spring pressure cause a screw to rotate? I'm now more lost than ever. I wish I could see a cut-a-way of this mechanism. Insomnia will strike again tonight.

'92 Honda Z50R
'94 Kawasaki KLX250 modded to 340cc's
'00 Yamaha YZ426F
'94 Yamaha 125 scooter
'05 Vespa E4 scooter
'68 Vespa VBB scooter (restored)
'06 Wee
'03 Honda S2000 roadster
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post #9 of 9 Old 05-20-2013, 11:01 AM
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It's not a screw. It's a pawl. The coil spring inside pushes the dark colored toothed rod outward against the cam chain guide. The ratchet allows the rod to extend but not retract. When the cam chain stretches enough, the ratchet clicks into the next notch. Pressing the ratchet at the red arrow releases it from the notches and allows the rod to be pushed back into the body. That's how the cam chain can be loosened for a valve clearance adjustment on a 650 by only removing the center screw and spring. Take them out, push the ratchet at the arrow and lift the cam chain.


Pat- 2007 DL650A was ridden to all 48 contiguous states. I didn't quite make it to 17,000 miles on the 2012 DL650A.
Nicknames I use to lessen typing, Vee = 2002-2012 DL1000s. Vee2=2014-2016 DL1000s. Wee = 2004-2011 DL650s. Glee = 2012-2016 DL650s
See https://www.stromtrooper.com/general...nicknames.html

Please vote in the poll on what Strom(s) you have at https://www.stromtrooper.com/informa...-you-have.html
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