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Offline TigerSteve

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Latest tune connected to radiator boil overs???
« on: 12 July, 2012, 11:56:48 PM »
Guys,

A long shot but...

Had what I guess was the new/current tune installed back in late February '12 and it went fairly well with little use until a trip across France into Germany and back (~2300 miles). At my first refuel I thought I'd treat myself to the tank of 98 octane. For the rest of the day, every time I stopped it boiled over. The weather wasn't particularly hot and I was never doing much faster than cruising at 55mph tops.  Stops were usually preceded by a trundle along at 31mph.

I stuck to the local 95 octane and boil overs reduced but never really went away, just one a day. Generally the 30/50kmh bits always seemed to raise the temperature while I was having the wear my inner jacket to stay warm and the running was a bit ragged at the lower speeds.

One thing did surprise me was how well  the Tiger ran on the 95 - E10 fuel and how this tended to reduce the boil ups. Not really sure what the E10 bit meant but thought it was 10% ethanol but it seem to also solve the boil ups.

 :465:

Scorched Yellow Tiger + Palmer Screen, SWMo Bars & Givi E55 box.

Offline dikman

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Re: Latest tune connected to radiator boil overs???
« Reply #1 on: 13 July, 2012, 12:14:48 AM »
I don't think I've heard of that one before - high octane fuel causing overheating  :087:.
Sounds more like a possible thermostat and/or cooling fan problem (unless the tune itself is corrupted somehow - that's a long shot). Seems as if there's not enough airflow at lower speeds to get rid of the heat being generated.

Yes, E10 means the fuel has 10% ethanol added. We have 94 E10 here, which I've used from time to time, and haven't found it any different to using straight 95RON.
'08 Tiger Blue (Gone but not forgotten).....replaced with
'08 Guzzi Breva (the lump).
'05 Opal/Tangerine T-100 Bonnie

Offline HAMLIN

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Re: Latest tune connected to radiator boil overs???
« Reply #2 on: 13 July, 2012, 01:48:28 AM »
Radiator cap. It has lost its seal and it blows its pressure into the expansion tank, fills it, then dumps it out the overflow hose.
2016 Stelvio, 2015 Norge, 2008 Breva1200 Sport, 2018 Aprilia Caponord, 2008 Griso. Self employed factory trained Motus, Triumph, Aprilia and Moto Guzzi specialist. Owner, Hamlin Cycles, LLC a Moto Guzzi/Aprilia dealer.

Offline dikman

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Re: Latest tune connected to radiator boil overs???
« Reply #3 on: 13 July, 2012, 07:10:19 AM »
That make more sense than my ideas. The radiator cap is something that we tend to take for granted and overlook (I did!).
'08 Tiger Blue (Gone but not forgotten).....replaced with
'08 Guzzi Breva (the lump).
'05 Opal/Tangerine T-100 Bonnie