Monster cylinders&heads on Sport engine

discussion about the 750 Sport and '89/'90 900SS, which share many mechanicals with the Paso series
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paso750
paso grand pooh-bah
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Joined: Sun Jul 18, 2004 12:00 am
model: 750 Paso
year: 1987
Location: southern Germany

Re: Monster cylinders&heads on Sport engine

Post by paso750 »

I know it makes no difference how they are installed. I`m just wondering if there are indeed different sizes or if the ones Joep saw were just installed the other way around and made him think there were different sizes.
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ir_joep
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Joined: Sun Jul 26, 2009 7:35 pm
model: 750 Sport
year: 1989
Location: Haarlem, The Netherlands

Re: Monster cylinders&heads on Sport engine

Post by ir_joep »

paso750 wrote:Joep, sorry for the silly question but are you sure those "jets" weren't just installed upside down? Just asking because they have a smaller hole on one end. (at least mine do)
No. I had them in my hands, so I could see both sides.

I also noticed different oil jets on the Stein-Diense website ( # 080517125 and 075517125). I do not know if this is related to the inside diameter as they do not state the inside diameter of the oil jet.

Bye joep
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Derek
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model: 907 I.E.
year: 1994
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Re: Monster cylinders&heads on Sport engine

Post by Derek »

paso750 wrote:I know it makes no difference how they are installed. I`m just wondering if there are indeed different sizes or if the ones Joep saw were just installed the other way around and made him think there were different sizes.
Yes, there are different sizes. They are also used on Bevel engines and, if I remember correctly, it is recommended to change them to ones from later belt engines which have a larger hole. This is to increase the oil flow to the camshafts.
And you are right, upside down they will look different sizes as the restriction is at one end only. I have a pair from an ST2 lying around the garage somewhere.
1994 907ie
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