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gasket v silicone

Posted: Tue Feb 16, 2016 7:37 pm
by ChrisC
I put this in general chat because it is not VTR related, I'm restoring a 1950/60 2 stroke motorcycle and have got the engine is in bits, so i would like your thoughts on whether it would be better to buy a gasket set (if i can get one) or will a modern day silicon, if it's "petrol resistant" be better.
cheers chrisc

Re: gasket v silicone

Posted: Tue Feb 16, 2016 7:39 pm
by Motomvk
Why not both? :roll:

Re: gasket v silicone

Posted: Tue Feb 16, 2016 7:53 pm
by ChrisC
Hi motomvk, Because I was let down by an "e bayer" and by a bloke from the owners club...so to keep the job moving i was wondering if i needed a bloody gasket in the first place.

Re: gasket v silicone

Posted: Tue Feb 16, 2016 7:56 pm
by tony.mon
Depends where the gasket is, if it fits between parts that have, for example, shafts going through, the end float could be affected by leaving gaskets out.
And you can't replace head gaskets with silicon, although I've done it on a few engines as a cheap way of increasing the compression....

Re: gasket v silicone

Posted: Tue Feb 16, 2016 7:59 pm
by Wicky

Re: gasket v silicone

Posted: Tue Feb 16, 2016 8:10 pm
by ChrisC
Hi Tony, It' for the primary chain and gearbox engine casings ,i have gaskets for the cylinder head, carb to block and yes its a good point about the end float on the gear change shaft coming through the casing :thumbup: never give that a thought....but it is old british bike it will have loads more float than the Titannic ever had...
cheers

Re: gasket v silicone

Posted: Tue Feb 16, 2016 8:13 pm
by darkember
Wicky wrote:Make your own paper ones...

https://www.louis.de/en/rund-ums-motorr ... dichtungen
Spot on for the old bikes paper and cut is best
:thumbup: :thumbup:

Re: gasket v silicone

Posted: Tue Feb 16, 2016 8:18 pm
by sirch345
I have made my own primary casing gaskets before (many years ago) for both of my Tritons and a Triumph 650 Thunderbird. I used a cereal packet, although using a proper sheet of gasket material would probably be a better option.
What's the engine, a Villers :?:

Chris.

Re: gasket v silicone

Posted: Tue Feb 16, 2016 8:26 pm
by ChrisC
Thanks fellas , i will send off for some of that gasket paper ,looks good, years ago i tried thick brown paper or card and Stag....who remembers Stag jointing compound...it was orange and smelt like ...well...my first girlfriend.

Re: gasket v silicone

Posted: Tue Feb 16, 2016 8:30 pm
by MacV2
ChrisC wrote:Thanks fellas , i will send off for some of that gasket paper ,looks good, years ago i tried thick brown paper or card and Stag....who remembers Stag jointing compound...it was orange and smelt like ...well...my first girlfriend.
Dont send off for it ! Go to your local motor factors, they will have it in stock...Better to give them the money than helping Amozon or egay not pay thier taxes... :x

Re: gasket v silicone

Posted: Tue Feb 16, 2016 8:39 pm
by ChrisC
Hi Chris , It's a Francis Barnett falcon. it belonged to an old mate of mine, he asked me to take it to the scrap as it in bits and has not run for thirty odd years , he thinks its gone, but I'm restoring it and i am going to give it him back when finished.,


just hope he doesn't scrap it off when i do.

Re: gasket v silicone

Posted: Tue Feb 16, 2016 8:46 pm
by ChrisC
Good call Mac V2, Even better ...
Do you know what this forums great, Thank one and all :thumbup: :thumbup: :thumbup:

Re: gasket v silicone

Posted: Tue Feb 16, 2016 8:48 pm
by sirch345
ChrisC wrote:Hi Chris , It's a Francis Barnett falcon. it belonged to an old mate of mine, he asked me to take it to the scrap as it in bits and has not run for thirty odd years , he thinks its gone, but I'm restoring it and i am going to give it him back when finished.,


just hope he doesn't scrap it off when i do.
That's brilliant Chris, good man, what a mate you are :clap:

Good luck with the work,

Chris.

Re: gasket v silicone

Posted: Tue Feb 16, 2016 8:55 pm
by ChrisC
I'll put up a picture when finished. i had pictures of the rusty bits in boxes but my bloody digital camera failed and i lost the lot....gutted...

Re: gasket v silicone

Posted: Tue Feb 16, 2016 10:21 pm
by bigtwinthing
buy some "Curil T" its superb and never goes hard etc. I use a gasket too on my bikes but you don't always need a gasket.