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Build Thread - WKWS Flat top 066

jmester

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So what wrist pin and bearing do you use on the 288 piston. What benefit does it have on a stock cylinder
 

Brewz

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So what wrist pin and bearing do you use on the 288 piston. What benefit does it have on a stock cylinder
288 piston uses a 13mm wrist pin where the stock 660 piston has a 12.
288/395/3120/084/088/880 wrist pin bearings are all same size and fit.
Advantages:
288 piston is the same physical height as a 660 piston but sits 1mm (0.040"") lower when fitted to the crank. I use them on a cylinder with excessive exhaust duration that I want to reduce without gaining intake duration.
There are a few tricks to fitting it in, and once its done you can't go back to a 660 piston with that cylinder.
288 pistons also have wider skirts than 660, a single 1.5mm ring with rear centre pin and a couple other little advantages when it comes to porting.
Its not something I do often, depends on the cylinder and what its going to be used for.
 

Brewz

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Please time it before cutting everything down. I'd like to see where the numbers land.
If you had been taking notice, you would have seen I already posted stock numbers.
Not so lightening fast hey.
 
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mdavlee

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Too funny, Kenny’s getting called out!
I’m not sure I remember hearing of any Lightning performance saws to be honest.
I’ve only seen him with stock saws at GTGs.

I smell a race for pink slips at the next gtg. Big log or making cants milling races?
 

XP_Slinger

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288 piston uses a 13mm wrist pin where the stock 660 piston has a 12.
288/395/3120/084/088/880 wrist pin bearings are all same size and fit.
Advantages:
288 piston is the same physical height as a 660 piston but sits 1mm (0.040"") lower when fitted to the crank. I use them on a cylinder with excessive exhaust duration that I want to reduce without gaining intake duration.
There are a few tricks to fitting it in, and once its done you can't go back to a 660 piston with that cylinder.
288 pistons also have wider skirts than 660, a single 1.5mm ring with rear centre pin and a couple other little advantages when it comes to porting.
Its not something I do often, depends on the cylinder and what its going to be used for.
That’s some insight right there. Thanks for sharing Tony. Cheers Dall

:beer-toast1:
 

big t double

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Too funny, Kenny’s getting called out!
I’m not sure I remember hearing of any Lightning performance saws to be honest.
I’ve only seen him with stock saws at GTGs.
With backwards chains....at one time I had the pic to prove it. Poor Kenny...poor poor Kenny. :D
 

Time's Standing Stihl

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With backwards chains....at one time I had the pic to prove it. Poor Kenny...poor poor Kenny. :D

Had to dig a bit, but i found it [emoji41]


7c7fa10d84a7ffe4661258dbd83cff2f.jpg
 
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