| Tip on adjusting valve lash [message #455085] |
Fri, 30 September 2005 00:20 |
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It is not necessary to observe piston travel. You may remove plugs to
facilitate turning the crank, but that is not essential.
Two cylinder engines are easy. Remove the rocker covers. To adjust
cylinder #1, observe cylinder #2's valves. When the exhaust valve finishes
its closing and the intake begins to open the crank is in the position
where cylinder #1 is at TDC (finishing its compression and starting its
power stroke). Adjust lash on #1. Then to do #2, repeat, observing
cylinder #1's valves.
For multis, you need to determine cylinder pairs. If the firing order is
1,3,4,2 simply write 1,3 over 4,2. The pairs are thusly 1 & 4 and 3 & 2.
Now you can use the method described above for two cylinder engines. For
example, observe the vales of cylinder 1 to set cylinder 4 and vice-versa.
Then do the same with the pair, 3 & 2.
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| Re: Tip on adjusting valve lash [message #455091 ] |
Fri, 30 September 2005 02:01 |
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Nomen Nescio wrote:
> It is not necessary to observe piston travel. You may remove plugs to
> facilitate turning the crank, but that is not essential.
Why don't you at least wait until somebody asks how to adjust their
valves before you post an answer? That's what this forum is about, it's
not a platform for you to display your writing skills.
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| Re: Tip on adjusting valve lash [message #455102 ] |
Fri, 30 September 2005 08:15 |
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krusty kritter <kriyamanna [at] aol.com> wrote:
> Nomen Nescio wrote:
> > It is not necessary to observe piston travel. You may remove plugs to
> > facilitate turning the crank, but that is not essential.
>
> Why don't you at least wait until somebody asks how to adjust their
> valves before you post an answer? That's what this forum is about, it's
> not a platform for you to display your writing skills.
Oh, he's back, is he? I remember him as one of the dimmest punters I've
ever seen on this ng.
--
Trophy 1200 750SS TR65 GPz550 CB400F CB125S DT50MX
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 ANORAK#06 YTC#3
BOF#30 WUSS#5 The bells, the bells.....
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| Re: Tip on adjusting valve lash [message #507904 ] |
Tue, 08 November 2005 04:41 |
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On Fri, 30 Sep 2005 00:20:04 +0200 (CEST), Nomen Nescio
<nobody [at] dizum.com> wrote:
>It is not necessary to observe piston travel. You may remove plugs to
>facilitate turning the crank, but that is not essential.
>
>Two cylinder engines are easy. Remove the rocker covers. To adjust
>cylinder #1, observe cylinder #2's valves. When the exhaust valve finishes
>its closing and the intake begins to open the crank is in the position
>where cylinder #1 is at TDC (finishing its compression and starting its
>power stroke). Adjust lash on #1. Then to do #2, repeat, observing
>cylinder #1's valves.
>
>For multis, you need to determine cylinder pairs. If the firing order is
>1,3,4,2 simply write 1,3 over 4,2. The pairs are thusly 1 & 4 and 3 & 2.
>Now you can use the method described above for two cylinder engines. For
>example, observe the vales of cylinder 1 to set cylinder 4 and vice-versa.
>Then do the same with the pair, 3 & 2.
Well it would be nice if you mentioned the fact that your method
only works for some parallel twins. Some parallel twins have both
pistons at the top at the same time, some are 180 degrees apart on the
crank. My old Honda 450 was the latter. Your method wouldn't work on
it. And you would really screw up a Harley or a 90 degree twin like
my Guzzi if you went at it with your method! I would rather put a
chopstick in the sparkplug hole and be sure the piston in the cylinder
I am working on is at the top and that both valve rockers have some
free play. If there is no free play the crank needs to go around
again. That works on anything.
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