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Old 08-23-2014, 05:48 AM   #1
Watty100 OP
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Joined: Nov 2010
Location: UK Midlands
Oddometer: 9
DT175 Pistons

Hi Guys,

I have a 1974 DT175A, in need of a new piston.

I've been supplied one for a DT175E, the monoshock MX version from about 1979 onwards, external dimensions are correct, but the ports are larger.

Will this piston work, or is it back to the shop for an exchange?

Cheers
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Old 08-23-2014, 10:16 AM   #2
daviethebiker
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Joined: Dec 2012
Location: Watsonville, CA
Oddometer: 43
The larger ports on the older engine will change the port timing I think. The piston may work but will probably work as well as the correct piston does. And the piston ring position may be different causing the ring to catch on a port. I would try to find the stock piston for that specific model.
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Old 08-24-2014, 05:53 AM   #3
Watty100 OP
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Joined: Nov 2010
Location: UK Midlands
Oddometer: 9
Good point about the rings, just compared the position of the retaining pegs, very different, not going to risk them, back to the dealer!
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