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 Post subject: Cyliner Head Markings, what do they mean?
PostPosted: Sun Jan 08, 2017 6:28 pm 
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Joined: Fri Mar 11, 2016 9:16 am
Posts: 4
Location: UK
model: 750 Paso
year: 1989
Hi There. Just stripping down one of my Paso's and have noticed two things about the motor. 1, it has not got an engine number which I am assuming is because the crank case must have been changed ?? 2. there are markings on the cylinder heads of HU. See picture. Anyone know what the significance of these are? Feedback appreciated.

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 Post subject: Re: Cyliner Head Markings, what do they mean?
PostPosted: Tue Jan 17, 2017 5:48 pm 
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Joined: Mon Dec 15, 2014 11:05 am
Posts: 92
Location: Sleepy leafy South Birmingham UK
model: 750 Paso
year: 1987
What's HU?

What picture?

I'm assuming 'timing marks for belt change' is the answer to your question, if you mean these.

Image

Re the engine number - viewtopic.php?f=13&t=4088

Whereabouts in the UK are you?

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 Post subject: Re: Cyliner Head Markings, what do they mean?
PostPosted: Wed Jan 18, 2017 1:55 am 
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paso grand pooh-bah
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Joined: Wed Dec 05, 2007 12:35 am
Posts: 1596
Location: Newzealand
model: 906 Paso
year: 1990
My SS had V2 on them , cant remember what Paso has but HU sounds familiar , I think they are just model ( of the head ) codes , like W heads have a hemi chamber , V's have the bathtub shape , other changes were for bronze or cast iron valve guide , removable clip on later models allowed the opener rockers to be slid aside ( as opposed to being removed completely ) to allow access to the closing shims.

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 Post subject: Re: Cyliner Head Markings, what do they mean?
PostPosted: Wed Jan 18, 2017 9:18 am 
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paso grand pooh-bah
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Joined: Thu Nov 03, 2011 10:13 am
Posts: 542
Location: Scotland
model: 907 I.E.
year: 1994
They means just what McTool says. They refer to the particular head design and components. The heads on my 907 are marked HZ. The 900SS I used to have had V2 which was desirable, unlike the W2 on some 900 Monsters which had smaller 750 sized inlet valves.

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 Post subject: Re: Cyliner Head Markings, what do they mean?
PostPosted: Wed Jan 18, 2017 3:18 pm 
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Joined: Mon Dec 15, 2014 11:05 am
Posts: 92
Location: Sleepy leafy South Birmingham UK
model: 750 Paso
year: 1987
Ah I'm with it now, I thought 'HU was short for 'Horizontal something or other'. Wake up time I guess . . . :O

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 Post subject: Re: Cyliner Head Markings, what do they mean?
PostPosted: Wed Jan 18, 2017 6:57 pm 
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paso grand pooh-bah
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Joined: Wed Dec 05, 2007 12:35 am
Posts: 1596
Location: Newzealand
model: 906 Paso
year: 1990
Yeah me too Mark , I actually ( in a moment of unbridled optimism) thought that maybe my V2 heads had been fettled by Brook Henry of Vee Two fame .............but no :-(

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