Jump to content

How do you find tdc?

Recommended Posts

Just recently got a new bike. Barnd new kx. How do you find tdc? Also when you push the kick start down, at first it loose and then all of a sudden it becomes much harder to push. Is that because it's suddenly gripped the gearing or is it because it's compressing the cylinder? Thanks

Share this post


Link to post
Share on other sites

Remove the spark plug. And insert something that allows you tongondown far enough to feel the rop of the piston. And have slowly move the kick starter until the piston is all the way up and starts to go down.

Share this post


Link to post
Share on other sites
9 minutes ago, Dieselbeast90 said:

Remove the spark plug. And insert something that allows you tongondown far enough to feel the rop of the piston. And have slowly move the kick starter until the piston is all the way up and starts to go down.

Ah thanks for the reply. But is there anyway by feeling it with the kickstart? Like when you push the kickstart down and then it gets hard, is that compressing the cylinder?

Share this post


Link to post
Share on other sites

On the left side of the bike, on the generator cover, there are two plugs. Remove the top (smaller) one and you will see the flywheel. Rotate the engine (removing the lower plug reveals a big nut, use that to turn the engine over) and a notch should appear. That is TDC.

Edit: you will not find TDC using the kick-start. Also, removing the spark plug makes the engine turn over more easily. And lastly, you will need to remove the valve cover if you are looking for TDC of a certain stroke. 

Edited by MarioThePlumber
  • Like 1

Share this post


Link to post
Share on other sites
Just recently got a new bike. Barnd new kx. How do you find tdc? Also when you push the kick start down, at first it loose and then all of a sudden it becomes much harder to push. Is that because it's suddenly gripped the gearing or is it because it's compressing the cylinder? Thanks

Yes, that's what's happening. When you press your kickstart lever, you can feel the piston getting more difficult to push when it compresses the air/fuel mixture as it approaches tdc. You should be in neutral so it doesn't "grip the gearing" as you are trying to start it. Not accurate enough to set the timing on your bike, but most riders find tdc before kick starting, if thats what you are asking. 

 

 

Share this post


Link to post
Share on other sites
2 minutes ago, Sofiedog said:


Yes, that's what's happening. When you press your kickstart lever, you can feel the piston getting more difficult to push when it compresses the air/fuel mixture as it approaches tdc.

Oh sweet yeah. So to find tdc for when your starting the bike you slowly move the kick lever down and through the hard spot and then you're there? So bring it back to the top and kick? Thanks very much for the answer man

Share this post


Link to post
Share on other sites
9 minutes ago, William1 said:

Please stop asking the same question over and over and over. It has been answered by a half dozen people already.

Thanks and enjoy TT.

I have never asked that before... It's also never been answered before

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:


×