Author Topic: Homelite 540 piston options  (Read 1320 times)

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Offline mweba

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Homelite 540 piston options
« on: June 12, 2012, 03:13:46 pm »
Have a 540 I would like to get back o the road but the piston is worn way past tolerance.  A 385xp piston would be a perfect fit IE pin height but the wrist pin itself is to small.  Pin in the Homie is .5".  Any ideas on a 54mm slug to fit to this saw?

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Offline Cut4fun .

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Re: Homelite 540 piston options
« Reply #1 on: June 12, 2012, 03:21:38 pm »
What is the wrist pin size of homie in mm?

Just throwing some out there. husky 288   jonsered 920 930   stihl 056  echo 900  big bore dolmar 7900  big bore stihl 460  stihl 660
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Offline mweba

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Re: Homelite 540 piston options
« Reply #2 on: June 12, 2012, 03:26:47 pm »
12.5  >:(

Offline Cut4fun .

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Re: Homelite 540 piston options
« Reply #3 on: June 12, 2012, 03:29:20 pm »
scratch my list 12.5mm  :o   Use bushing?
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Offline mweba

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Re: Homelite 540 piston options
« Reply #4 on: June 12, 2012, 03:32:14 pm »
Was hoping to avoid it but that may be the only option.  Plenty of machinist friends for the job but you know.....

Offline mweba

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Re: Homelite 540 piston options
« Reply #5 on: September 15, 2012, 09:34:29 am »
Will be doing some testing on a press in bearing race in the near future.  The plan is to run a 385xp piston and pin bearing.  The piston dimensions are identical with the exception of the skirt being 1.5mm shorter.  The intake could afford more duration anyway.

Offline Cut4fun .

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Re: Homelite 540 piston options
« Reply #6 on: September 15, 2012, 11:29:35 am »
Will be doing some testing on a press in bearing race in the near future.  The plan is to run a 385xp piston and pin bearing.  The piston dimensions are identical with the exception of the skirt being 1.5mm shorter.  The intake could afford more duration anyway.

Bet it works fine. 

 The intake skirt on my 475 piston conversion was shorter too and I think that extra intake duration is what is making that saw run so good IMO.
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Offline 660magnum

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Re: Homelite 540 piston options
« Reply #7 on: September 15, 2012, 12:52:57 pm »
Seams I remember the 52mm piston you stuck in that 475 didn't have windows either where the original did?
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Offline Cut4fun .

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Re: Homelite 540 piston options
« Reply #8 on: September 15, 2012, 02:02:54 pm »
Seams I remember the 52mm piston you stuck in that 475 didn't have windows either where the original did?

Yep but it was made for a closed port quad transfer cylinder BB372 

The 425 used solid OEM piston in a closed port cylinder too.
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