Sydney to London on a105cc Honda callled Dot

[nathanthepostman]

Okay Grifter, talk me through it.

At minute I've got valves adjusted using method mentioned previously; rotate 'til top valve is all the way in, check bottom valve. And vice verse.

Been for a run today and she just doesn't feel quite right.

Could you talk me through it, step by step, as though I'm a moron so that there's no confusion.

Like, how do I know that I'm 180 degrees out or not?

And because I've perhaps now got the clearance wrong, how will I know for sure that I've rotated it to the right place and that both valves should wiggle at the same time.

Perhaps best to reset and start again from scratch

And this has to be done on a cold engine right?

... and a magnetic sump plug has been fitted, which did seem to have done it's job.

[bonzodg]

Hi,Nathan
Baffled about 180 out being a problem.
Every second crank rev it's always at 180,the next rev brings it to 360 again!
If you're checking the valve clearances,take off the tappet covers,choose a valve to check.
Turn the flywheel until the chosen valve is fully pressed in.
Now turn the crankshaft(flywheel)one full revolution,this will turn the camshaft a half rev so the cam lobe will be totally away from the cam follower.
This applies to all 4strokes I've ever worked on.
Hope this is what you need to know

[bonzodg]

AND.............................
if you need to check the camshaft timing with the crankshaft -
turn the crankshaft until both valves are rocking(one going in,one coming back out)
Put a slim screwdriver in the spark plug hole and press it against the top of the piston.
It should be at the top of its stroke.
This is a bloody good 'rule of thumb' way to check,though some camshafts are set very slightly off top dead centre.
Good luck!

[nathanthepostman]

Now I'm baffled.

As they say here in England, and perhaps in other parts of the world as well; there's more than one way to skin a cat. And it seems with valve clearance that's also true as well.

Going to sit down later, take my time over the manual, try and figure it all out and try again once she's cooled.

Just answer me this; how many passes can the 'T' make past the marker before it has completed one 'cycle'; is it two?

And lastly, to anyone who might be wondering why this has become a mechanical seminar and not a ride report, I can only apologise. Sorry.

[Adv Grifter]

Originally Posted by nathanthepostman

Now I'm baffled.

As they say here in England, and perhaps in other parts of the world as well; there's more than one way to skin a cat. And it seems with valve clearance that's also true as well.

Going to sit down later, take my time over the manual, try and figure it all out and try again once she's cooled.

Just answer me this; how many passes can the 'T' make past the marker before it has completed one 'cycle'; is it two?

And lastly, to anyone who might be wondering why this has become a mechanical seminar and not a ride report, I can only apologise. Sorry.

YES! Two revolutions. Always rotate the motor FORWARD .... as in the drive direction. (use kick start to determine which direction is forward) When rotating, never go back.

I would not use a screw driver down the spark plug hole ... but the idea is good. Use a chop stick or some such, don't let it break off. When rotating, you will come round to the compression stroke and your chop stick will rise UP as piston come to TDC. At this point line up timing mark. Once there, you are ready to check valve clearances.

If you have adjusted valves when not on compression stroke at TDC, then your current valve setting may be all screwed up and will need to be re-set when at TDC on compression stroke.

Reading the manual is good ... but not always easy to understand.

Good luck!

[Brainflex]

http://www.youtube.com/watch?v=QJciyJRJh8Q

http://www.youtube.com/watch?v=Hppcq...eature=related

[bonzodg]

Nice one,Brainflex - wish I'd flexed MY brain and checked youtube!

Liking this video Nathan,same message,different 'language' -

whichever gets the message across clearly to you,eh?

Cheers

[nathanthepostman]

I got it I got it!!

...if both valves are wiggly then you're on the compression stroke; adjust clearance accordingly.

A bit slack first time, but just re-done and it seems I'm about there. The nuance of 1/8 turn really does make a difference.

Now, as they say in India; full power 24 hour!

Cheers for all the help guys.

[Mr. Fisherman]

So whats the next big adventure?

[platypus121]

Originally Posted by Mr. Fisherman

So whats the next big adventure?

Could it be something like this ....?


http://www.youtube.com/watch?v=xDOOT-T2gKo


The URL even has DOT in it.


Cheers,
Bernard

[RDT953]

Originally Posted by platypus121

Could it be something like this ....?


http://www.youtube.com/watch?v=xDOOT-T2gKo


The URL even has DOT in it.


Cheers,
Bernard

Laughed out loud, and I ride a BMW haha

[nathanthepostman]

Haha, that's awesome.

Good old Ed. He'll do it no problems.

[bk brkr baker]

Originally Posted by nathanthepostman

I got it I got it!!

...if both valves are wiggly then you're on the compression stroke; adjust clearance accordingly.

Cheers for all the help guys.

No nessesarily. TDC comes up twice per combustion cycle. Ergo the valve tappets will get wiggly twice.

To be sure you're on the right stroke place your finger on the exhaust tappet. When you feel it go down and return , stop at TDC and adjust the valves.

Good wrenching to you.

[platypus121]

Originally Posted by bk brkr baker

TDC comes up twice per combustion cycle. Ergo the valve tappets will get wiggly twice.

Bad advice !

Nathan had it right.

At the top of the "wrong" TDC (end of the exhaust stroke), the exhaust valve will still be open a little.
So no wiggle of the exhaust rocker arm at this TDC.

It is only at the TDC at the end of the compression stroke that both rocker arms have free play and this is the point at which they should be adjusted.

PS
It's hard to get the motor to stop at exactly TDC - it wants to move one way or 'tuther, but there's no need to be to paranoid about getting the
absolute TDC point (other than getting the correct one, that is). The rockers will have no pressure on them from the cam for a few degrees before and
after TDC so there's a bit of leeway with the setting point.

Cheers,
Bernard

[rthuey]

Out of an estimated 20,000 threads (40 per line x 500 pages) Yes i see that there are 733 pages, a bunch seem to have been moved.

There are currently only 11 Ride Report threads that can claim the additional fame of being members of the 1 million + views club.

Glen is way closer to his 3 millionth view than the 1 mark.
Doug is here twice...looks like your dirtster is a bit more popular than the panhead.
Clayton appears to engage his readers so much in his stories that they are to mesmerized to reply.

Would be great if the mods could let us know how many subscribers each of them have.

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