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r1chard06

Gas gas 1991 ? Trials 250

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Anyone no if head gaskets changed around 1991 I’ve orderd a few replacement but there all same and don’t fit there to thin and sit lower than channel there in

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Are you referring to the Aire (air cooled) or the Delta (water-cooled), both are from 91?

The Cylinder head O Rings on the 91 Delta are listed in the original parts book as:

M01619115 80mm x 2.62mm 

and M01619110  125mm x 2.62mm

The Aire gasket part number is not listed in the original parts book, but it looks like a paper gasket.

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Water cooled I think it’s a delta as looked at pics looks like mine with gold head and gasgas logo

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Also you wouldn’t have a wording diagram and info on fork seals change I thought my bike was a 93 as it has coolant tank

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Also you wouldn’t have a wording diagram and info on fork seals change I thought my bike was a 93 as it has coolant tank

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Wow, that's a rare old beast. Almost certain its a Delta, plastics would originally have been white (1990) or green/purple (1991)

Looks like a delta engine plus has other delta parts on it so pretty sure that's what it is.

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Anyone tell me if head gaskets were different than 1993 model I thought was delta but has coolant tank that only came out on 93 one

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