Cam gear marks
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Tourer
Joined: May 2009
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From: Middleboro, MA USA
Cam gear marks
I'm doing a cam swap and I'm reusing the stock cam gear on new cam. My question is on marking the stock gear. Before I removed the cam, I made corresponding marks between cam gear and the breather gear and pinion. Now before I remove the gear from the stock cam I am supposed to mark lines where the cam key way sits on the gear? When I put the gear on the new cam I line up the cam key way with the marks I made on the gear?
Seasoned HDF Member
Joined: Dec 2010
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From: Coromandel Peninsula New Zealand
The cam gear has marks for breather gear and crank gear stamped on. Some have two lines on the back of the cam gear that match the keyway....if there are none then you need to make some.
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Tourer
Joined: May 2009
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From: Middleboro, MA USA
Thanks. I think I need to do some reading to understand the timing aspects better. When I removed the cam I had already taken my cylinders off. Both the pistons are at an even height half way up.
Seasoned HDF Member
Joined: Dec 2010
Posts: 7,736
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From: Coromandel Peninsula New Zealand
Before you remove the cam you should turn the motor to align the cam marks and this is at one cylinder's TDC.
There is a dot and a dash on the cam gear and corresponding dots on the crank pinion (often a dog to see with the nut on) and the breather gear.
You gotta line these up on reassembly or it will hurt your wallet.
I'd be the last man to cry "Factory Manual" on this site but there are some things you need a manual for if you don't have sufficient wrenching experience to know how things work and what to look for on disassembly.
Doesn't make you a bad person but it might make you poor ;-)
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Tourer
Joined: May 2009
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From: Middleboro, MA USA
"Before you remove the cam you should turn the motor to align the cam marks and this is at one cylinder's TDC."
Yup, I didn't do that. oops.
I did mark the cam gear against the breather and pinion before I removed it, so I can put the cam back in and then move it to TDC. What's the difference with just marking the cam gear against the pinion and breather when it's in the cam chest when it's not TDC, or using the TDC marks on the gears to line them all up? Not that I'm arguing with your advice, but I want to understand all this.
Before I press off the stock cam gear I need to mark the cam gear where it corresponds with the cam key way? Then I line up the marks on the gear with the key way of the new cam as I press it on right? It seems too easy.
I have a well used, dog eared manual full of page holders and greasy finger prints. Sometimes it's just more useful to me to hear from those that have done what I am doing. The manual doesn't answer follow up questions.
Thanks for the help-
Yup, I didn't do that. oops.
I did mark the cam gear against the breather and pinion before I removed it, so I can put the cam back in and then move it to TDC. What's the difference with just marking the cam gear against the pinion and breather when it's in the cam chest when it's not TDC, or using the TDC marks on the gears to line them all up? Not that I'm arguing with your advice, but I want to understand all this.
Before I press off the stock cam gear I need to mark the cam gear where it corresponds with the cam key way? Then I line up the marks on the gear with the key way of the new cam as I press it on right? It seems too easy.
I have a well used, dog eared manual full of page holders and greasy finger prints. Sometimes it's just more useful to me to hear from those that have done what I am doing. The manual doesn't answer follow up questions.
Thanks for the help-
Seasoned HDF Member
Joined: Dec 2010
Posts: 7,736
Likes: 1,524
From: Coromandel Peninsula New Zealand
"Before you remove the cam you should turn the motor to align the cam marks and this is at one cylinder's TDC."
Yup, I didn't do that. oops.
I did mark the cam gear against the breather and pinion before I removed it, so I can put the cam back in and then move it to TDC. What's the difference with just marking the cam gear against the pinion and breather when it's in the cam chest when it's not TDC, or using the TDC marks on the gears to line them all up? Not that I'm arguing with your advice, but I want to understand all this.
Before I press off the stock cam gear I need to mark the cam gear where it corresponds with the cam key way? Then I line up the marks on the gear with the key way of the new cam as I press it on right? It seems too easy.
.
Thanks for the help-
Yup, I didn't do that. oops.
I did mark the cam gear against the breather and pinion before I removed it, so I can put the cam back in and then move it to TDC. What's the difference with just marking the cam gear against the pinion and breather when it's in the cam chest when it's not TDC, or using the TDC marks on the gears to line them all up? Not that I'm arguing with your advice, but I want to understand all this.
Before I press off the stock cam gear I need to mark the cam gear where it corresponds with the cam key way? Then I line up the marks on the gear with the key way of the new cam as I press it on right? It seems too easy.
.
Thanks for the help-
You can make your own marks its true but best to use the correct ones as then you know it is right.
Yup, just mark the keyway and press the sucker on....requires a steady hand....
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Tourer
Joined: May 2009
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From: Middleboro, MA USA
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Tourer
Joined: May 2009
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From: Middleboro, MA USA
I forgot to take off the timing cup first time I went to pull the nosecone. Luckily I realized what was happening before I pulled it out all the way. It was late and I was tired. That's my excuse. lol
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