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Old 10-20-2009, 09:42 AM   #1 (permalink)
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How big is the exhaust port on the 155z? Please help.

I just got my 155z engine last week but instead of it being the pitster 155z like I thought, it turned out to be the OGM 155z which says 160cm3 and didn't come with a carb or oil cooler which John from medina was nice enough to send me the parts (although the carb doesn't fit) since OGM wouldn't help out. Is the jug supposed to read 160cm3 since the displacement decreace from 160 to 155.7 was from the head gasket, connecting rod, or head cc's or a combination of the three?

But my main concern is the exhaust port looks so tiny I don't see this thing making the 14hp the pitster is rated at. Can somebody get me a measurement on their exhaust port diameter? Thank you.
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Old 10-20-2009, 09:54 AM   #2 (permalink)
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Re: How big is the exhaust port on the 155z? Please help.

how do u know its an ogm? ide like to see some pics...
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Old 10-20-2009, 10:30 AM   #3 (permalink)
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Re: How big is the exhaust port on the 155z? Please help.

Quote:
Originally Posted by kawasakicoby125 View Post
how do u know its an ogm? ide like to see some pics...
Well for one, the box it came in said........OGM right on the sides. Has the pitster style clutch side cover too just without the pitster logo

Last edited by camz28aro; 10-20-2009 at 10:37 AM.
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Old 10-20-2009, 10:32 AM   #4 (permalink)
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Re: How big is the exhaust port on the 155z? Please help.

what about the side of the motor? dies it say ogm there? there is a long reason y the box says ogm.
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Old 10-20-2009, 10:39 AM   #5 (permalink)
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Re: How big is the exhaust port on the 155z? Please help.

pictures of yx 150 exhuast port, 3 pages back under [ yx 150 350.00 obo]
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Old 10-20-2009, 10:43 AM   #6 (permalink)
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Re: How big is the exhaust port on the 155z? Please help.

its the same motor. don't worry about it. Comes from the same factory
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Old 10-20-2009, 11:02 AM   #7 (permalink)
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Re: How big is the exhaust port on the 155z? Please help.

They all say 160cc.
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