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Fuel type

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StevieG View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote StevieG Quote  Post ReplyReply Direct Link To This Post Topic: Fuel type
    Posted: 07 May 2018 at 10:22
hi, I’m new to the forum having just  purchased my first Moto Guzzi. 1980 V5 II
My question is, what type of fuel should I be putting in the bike?
I know this is a very basic question!!! Sorry!!!
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iansoady View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 2018 at 11:47
I'm using Texaco Supreme / Shell VPower etc in my 1982 V50 as the original handbook specified 97 octane.
Ian
1952 Norton ES2
1986 Honda XBR500
1958-ish Greeves/Triumph in progress
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StevieG View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote StevieG Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 2018 at 12:01
thanks for the quick response, so unleaded fuel is ok?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote iansoady Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 2018 at 13:48
Yes. Guzzis, having alloy heads, have valve seat inserts. They may not be super-duper exotic materials but should be no trouble with unleaded. It's cast iron heads with the seats in the actual head material (like my Norton) which are sometimes problematic although I'm sure that will be OK too.

Back in the 1990s I spent a lot of money having special valve seats fitted to my Norton Commando only to discover that the original ones would have been fine.
Ian
1952 Norton ES2
1986 Honda XBR500
1958-ish Greeves/Triumph in progress
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StevieG View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote StevieG Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 2018 at 13:57
that’s great news!! 
Thanks for your help, I’m sure it won’t be the last question I will be asking.

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Brian UK View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 2018 at 17:35
I ran my v50 on standard supermarket basic petrol with no problems. Tried the super stuff but could not tell the difference.
Brian.

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johnno View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote johnno Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 2018 at 18:20
the super as a cleaning agent also in it I believe . I run all my bikes on standard then every 3rd top up super

Edited by johnno - 07 May 2018 at 18:23
1100 sport corsa , Yam R1, guzzi 650tt rider
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Jerry atric View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jerry atric Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2018 at 08:09
Use super/expensive stuff it has less ethanol, none from some suppliers. Ethanol is the worst enemy for older bikes.
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StevieG View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote StevieG Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2018 at 09:05
you’re all been a great help!!!
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Dukedesmo View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dukedesmo Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2018 at 09:34
I use super unleaded in all my bikes (and my car) because all are high Compression Ratio and/or high performance, both Ducatis have had the compression increased as part of some tuning and the LM2 was built in the 5 star, leaded era and has a fairly high CR (200psi).

My LM2 had a piston to exhaust valve interface a couple of years back, leading me to get the heads overhauled; K-line guides, new exhaust valves etc. 

The place that did the guides told me that the valve seats were fine for unleaded but that the original valves were not ideal (although many are running with them so can't be that bad). 

My replacement exhaust valves are a modern material and so fine for it and they told me it is not important with the intakes, only the exhausts due to the heat.
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Brian UK View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2018 at 09:41
The general rule for Guzzis and unleaded fuel, All Guzzi models with three disc brakes (and obviously later models with two) are fine with unleaded fuel.
Brian.

Better 5 minutes late in this world than years early in the next.
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Dave P. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Dave P. Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2018 at 15:17
I run my Loops on the highest octane petrol I can find though I do use the ordinart stuff is there's nothing else available.So far.....so good.
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