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Author Topic: F1 392 piston orientation  (Read 2828 times)

Offline r1_pete

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F1 392 piston orientation
« on: February 06, 2018, 07:04:30 PM »
Cant find any references, but do the dots on the 392 pistons go to the front of the engine?.

Cheers.

Pete.
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2009 Yamaha XJR1300 sold
1977 CB750F2 café racer project. Sold
1972 CB750K2 hot rod. Sold
and an E-Type Jaguar that considers itself worthy of all my spare cash. Sold

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1978 Reliant Scimitar Cosworth.

Offline Trigger

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Re: F1 392 piston orientation
« Reply #1 on: February 06, 2018, 07:24:47 PM »
Dots face the front Pete  ;)
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Offline r1_pete

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Re: F1 392 piston orientation
« Reply #2 on: February 06, 2018, 08:35:14 PM »
Cheers mate..
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2009 Yamaha XJR1300 sold
1977 CB750F2 café racer project. Sold
1972 CB750K2 hot rod. Sold
and an E-Type Jaguar that considers itself worthy of all my spare cash. Sold

1971 CB450
1978 Reliant Scimitar Cosworth.

Offline SamCR750

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Re: F1 392 piston orientation
« Reply #3 on: February 06, 2018, 11:06:59 PM »
Pete, the easy way to check if you're unsure is to check the off set of the piston pin.
The off set is always to the rear where the inlet valve is.

Sam. ;)
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Offline r1_pete

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Re: F1 392 piston orientation
« Reply #4 on: February 07, 2018, 10:20:03 PM »
Cheers Sam, useful for future ref...
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2009 Yamaha XJR1300 sold
1977 CB750F2 café racer project. Sold
1972 CB750K2 hot rod. Sold
and an E-Type Jaguar that considers itself worthy of all my spare cash. Sold

1971 CB450
1978 Reliant Scimitar Cosworth.

Offline SamCR750

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Re: F1 392 piston orientation
« Reply #5 on: February 08, 2018, 07:09:59 AM »
Physics come into it Pete but the easy way to explain the reason for it, it's to help the con rod to change direction from upwards to downwards  motion as it goes over TDC.

Sam. ;)
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