so, I've got to stick with the gold head with long plug. 

so, I've got to stick with the gold head with long plug. 

4 hours ago, scorpaian said:

so, I've got to stick with the gold head with long plug. 

TRS make a trials bike that is called the GOLD model which is their BLING version and if my understanding is correct the stuff that konrad put up for you has within  its contents an explanation of what the problem is , basically the GOLD version has a fuel tank underside design that will clear the long plug but the standard version of the TRS models needs a short plug because the fuel tank will not fit with the long plug type low comp gold coloured head insert as that version of the bike  needs a head insert that uses  the short plug , It is mentioned  in there somewhere that it is possible to buy an ultra low profile rubber plug cap to fit the HT lead that means you can use the normal long type plug and then the standard version models fuel tank will fit properly. Its probably  best if you go back and read the whole of the thread that konrad sent you and check what every post says. 

Edited January 30, 20251 yr by Tr1AL

Tr1al 

I've got a good anodised head insert with long plug and orange champion suppressor cap. 

The tank fits no probs, v difficult to remove suppressor cap though, I have done it but not easy. 

I ended up lifting tank up to re fit. 

I think I'll just use normal NGK long reach plugs!

The bike works great as it is, so "if it ain't broke" don't fix it!! :-)

Normal reach, long reach 🤔 no such thing unless there was only 2 spark plug ever made.

Edited January 30, 20251 yr by lemur

why put that diagram up?

I think the majority of people know what I mean. 

What's up with people on forums?

End of subject now!

Scorpaian: People have been trying to help you and you argue and throw their help back in their faces. They’ve been generous with their time and effort. You should say thank you instead of getting p****d off. You’re the problem on this forum not the others. Lemur, Konrad and others have been very helpful to me in the past and have been gentlemen about it too.

17 hours ago, scorpaian said:

Tr1al 

I've got a good anodised head insert with long plug and orange champion suppressor cap. 

The tank fits no probs, v difficult to remove suppressor cap though, I have done it but not easy. 

I ended up lifting tank up to re fit. 

I think I'll just use normal NGK long reach plugs!

The bike works great as it is, so "if it ain't broke" don't fix it!! 🙂

Don't take it personally about the normal thing it was me that prompted you to use the word normal in what I posted , probably because I am old and as we are talking specifically on a trials motorcycle forum about a 2 stroke engine then I tend to talk about the bikes including what used to be the norm which was a longer reach plug , if you go back to the 1980's you wont find too many 2 stroke trials motors using a short reach plug which is a relatively new thing in the trials bike world .  Outside of 2 stroke trials motors of course a long reach plug should not be referred to as a normal type , al though having said that I must say  every petrol engined van or car that I ever owned in my 61 years never had a short plug fitted and so perhaps I can excuse myself for calling long reach the normal ones. Enjoy riding your bike. Regards Alan.

6 hours ago, Tr1AL said:

Don't take it personally about the normal thing it was me that prompted you to use the word normal in what I posted , probably because I am old and as we are talking specifically on a trials motorcycle forum about a 2 stroke engine then I tend to talk about the bikes including what used to be the norm which was a longer reach plug , if you go back to the 1980's you wont find too many 2 stroke trials motors using a short reach plug which is a relatively new thing in the trials bike world .  Outside of 2 stroke trials motors of course a long reach plug should not be referred to as a normal type , al though having said that I must say  every petrol engined van or car that I ever owned in my 61 years never had a short plug fitted and so perhaps I can excuse myself for calling long reach the normal ones. Enjoy riding your bike. Regards Alan.

And if you go back to the 60s, 2 strokes such as Villiers will have short reach plugs 😂 Fashion I guess

Sparkplugs are designed to fit the cylinder head, long thread plugs are more typical on heads where they need to get past valves.  You have the unknown aftermarket cylinder head in hand to measure, we don't.    If you want to be rude, end of trying to help the likes,

The S3 website shows the 250 and 280 head inserts have the short plug neck and the 300 head insert has the longer neck. If that is different than the stock head insert than I guess try a longer plug of the same type/heat range and go from there.

 

On 1/29/2025 at 12:15 PM, scorpaian said:

Dude, you've missed the point, forget the plugs at mo, it's the insert I'm asking about, I have two short plugs (seems correct small ones) but the one in it is a long reach, why? is my insert different or incorrectly made?

Anyone have an answer, I think Konrad seems to get it, but still not overly clear!

You can cut it down on a lathe or get the correct insert . I went threw this. You can contact Jack's cycles in Maine USA  he will sell you the right one