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O ring for Mixture Screw

Posted: 26 Nov 2007, 13:38
by Eddie Evans
Has anyone found a good source for this little basket.
All the ones I have found so far are too thick. Even when I stretch one that is too small onto the mixture screw the thickness still means it does not fit in the carb properly.
I suspect that this is causing the bike to run badly at small throttle opening when not under load.
LT told me that it could be picked up anywhere :( and I have even rang a Honda dealer who says it is not availanble seperate and must be bought as part of a carb kit. £15 for a poxy o-ring is just too much :o

Re: O ring for Mixture Screw

Posted: 26 Nov 2007, 15:49
by Gwyn
[b]Eddie Evans :[/b]
> Has anyone found a good source for this little basket.
> All the ones I have found so far are too thick. Even when I stretch one that
> is too small onto the mixture screw the thickness still means it does not fit
> in the carb properly.
> I suspect that this is causing the bike to run badly at small throttle opening
> when not under load.
> LT told me that it could be picked up anywhere :( and I have even rang a
> Honda dealer who says it is not availanble seperate and must be bought as part
> of a carb kit. £15 for a poxy o-ring is just too much :o

I actually used the o-ring from the inside of an anodised tyre/tube dust cap :oops: Real bodge i know, but it works :D

Posted: 27 Nov 2007, 11:02
by SaffieD
Bodge? I'd call that some clever improvisation mate!!!

Posted: 27 Nov 2007, 12:28
by Gwyn
[b]SaffieD :[/b]
> Bodge? I'd call that some clever improvisation mate!!!

Why thank you kind sir :D :lol:

Posted: 29 Nov 2007, 18:26
by scrubs
Maplin are selling a really cheap O ring kit at the moment
It's not on their website but from memory is something like this.

http://cgi.ebay.co.uk/419-Pc-O-RING-Set ... dZViewItem

Re: O ring for Mixture Screw

Posted: 29 Nov 2007, 18:46
by andypugh
[b]Eddie Evans :[/b]
> Has anyone found a good source for this little basket.

What size is it? (Internal dia x section dia)

Posted: 29 Nov 2007, 19:13
by baker21
[quote]Maplin are selling a really cheap O ring kit at the moment
It's not on their website but from memory is something like this.
[/quote]

the maplin kit does not have the one needed in it(i have one) tis always the way having all the ones you DONT need :lol:

Posted: 29 Nov 2007, 19:31
by Eddie Evans
[b]baker21 :[/b]
> [quote]Maplin are selling a really cheap O ring kit at the moment
> It's not on their website but from memory is something like this.
> [/quote]
>
> the maplin kit does not have the one needed in it(i have one) tis always the
> way having all the ones you DONT need :lol:

It's the section diameter that is the problem.
The 3mm ID will stretch to fit but 1.5 section makes it too thick to be a good fit in the carb.
So ID must be 3 or 4 mm and the section 1.0 mm.

Posted: 29 Nov 2007, 23:04
by andypugh
[b]Eddie Evans :[/b]

> So ID must be 3 or 4 mm and the section 1.0 mm.

I can see the problem looking at
http://www.jameswalker.biz/docs/jwco/o_ ... ll_doc.pdf

That lists all the standard O-ring sizes, and nothing like your requirements is there.

Closest is BS607.

<More>
Aha!

http://www.allensperformance.co.uk/o-rings.html