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tappet info please help?

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eddie011
Two Stroke Sniffer



Joined: 11 May 2011
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PostPosted: 12:23 - 03 Jun 2015    Post subject: tappet info please help? Reply with quote
Ok so im looking for info on a morini fm125-4t6m engine 4 stroke 125cc engine but no look finding a workshop manual can anyone please help with valve clearances
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KnuckleShot
Scooby Slapper



Joined: 11 Dec 2014
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PostPosted: 13:01 - 03 Jun 2015    Post subject: Reply with quote
Try searching in youtube, might have a bit of luck there?
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Taught2BCauti...
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Joined: 12 Jan 2012
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PostPosted: 09:10 - 04 Jun 2015    Post subject: Reply with quote
As a general rule-of-thumb when exact clearances are unknown and can't be found, I use 0.006" for the Inlet, and 0.008" for the exhaust, when the engine is hot.
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Taught2BCauti...
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PostPosted: 10:04 - 04 Jun 2015    Post subject: Reply with quote
Acerman wrote:
Taught2BCautious wrote:
As a general rule-of-thumb when exact clearances are unknown and can't be found, I use 0.006" for the Inlet, and 0.008" for the exhaust, when the engine is hot.
Valve clearence is to be done at cold engine!


...and checked when it is hot, so that if anything has expanded due to heat, a working clearance is maintained.
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nowhere.elysium
The Pork Lord



Joined: 02 Mar 2009
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PostPosted: 11:36 - 04 Jun 2015    Post subject: Reply with quote
Taught2BCautious wrote:
Hot engine
You're an idiot.
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lihp
World Chat Champion



Joined: 22 Sep 2010
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PostPosted: 11:43 - 04 Jun 2015    Post subject: Reply with quote
Taught2BCautious wrote:

...and checked when it is hot, so that if anything has expanded due to heat, a working clearance is maintained.


Cold clearance specs are given and account for thermal expansion.

I agree with NE, you're an idiot.
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Taught2BCauti...
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Joined: 12 Jan 2012
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PostPosted: 12:04 - 04 Jun 2015    Post subject: Reply with quote
Adjust when cold, check when hot.

This method is only ever used when the exact clearances aren't known and cannot be found, and is done to ensure that you have a safe working clearance when the engine is at normal operating temperature.

If you know what the clearances should be (and the OP doesn't), they are usually given for a cold engine, then obviously you work on a cold engine.
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lihp
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Joined: 22 Sep 2010
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PostPosted: 12:07 - 04 Jun 2015    Post subject: Reply with quote
You're an idiot.
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