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I my god, that is funny... sorry but I thought the "450" comment was funny. I haven't had a chance to continue testing and checking (carbs etc) but as you say do the problems ever end, well just to make you feel better, when I took the bike for a test after cleaning plugs last weekend the ...

...As for the carb issues are absolutely sure the pilot circuit isn't blocked? The mixture screw having no effect on low/idle speed points to a blockage.What is likely is the idle speed screw is in enough to make the carb draw through the needle jet which will give you an idle of sorts but not a go...

Oh and by the way...why only the front cylinder?...could that be the universes way of screwing with your mind?

Dave::

Really!!!! I will give it a go, ready to try anything, but why is this not more a common problem now with unleaded fuel? I've been battling this problem for 18 months now and it's only just now that I am getting a few people suggesting this. Don't get me wrong, thank you so much for taking the time ...

machten: Thanks for the reply this is all very helpfull. I will pull the plunger out and check it out this weekend. Although I can wind the mixture screw in and it will falter and stall. wdietz186: Hmmm that's interesting. Yes I do use a lead substitute. I would be worried about not using though...?...

abmartin...I haven't changed the floats over yet. This would be my next try.

Dave::

Here is an update. I swapped the ignition boxes over and the bike ran well for a while. Then after a few times out the front plug started to fail again. So I have ruled out the ignition boxes. But here is the interesting discovery. I grabbed a previously failed plug and sprayed CRC on it and gave it...

Oh man I think you may have hit the nail on the head wdietz186.

That's about the only electrical component I hadn't replaced and would make sense when it gets hot. I can easily check by swapping over. Thanks for that gem. I will let you know how I go.

Dave::

Hmmmm. Haven't tried swapping the floats. Seems like an easy one to try so I will give that a whirl. Will let you know. any other suggestions please let me know, thanks. I did have someone suggest a sticky shim when it gets hot. Not sure about that as I have had the head done by Pete Smith at epicyc...

Hi Mizike, have done that already, no change. Slides were worn at the idle stop but have built them up with neadit, works fine.

Cheers Dave

Hi Rick, how did you go, I am very interested as I have exactly the same problem on my S2. This is the first time I have found someone with the same issue. I have replaced inlet manifold gaskets, cleaned the carbs a million times, had the head removed and the valves reseated, have just put new rings...

Hi there guys. Thanks Lumpy for the post. Have had a lot of drama after putting the head back on but think it might be rings now. Interestingly Lumpy I did do the oil squirt test just before you mentioned it on the post and the compression did come up to normal. i think maybe the rings are phuked. I...

Bloody awesome guiys, interestingly I had this thought in bed last night and was my next question if anyone had found success doing this, so thanks for the answers. I will do a overhaul at some stage but I have spent so much getting this bike to a point of...still not running, I fear my luck is runn...

Bevel Dave. Took your advice and sent to Pete Smith. He is by far the god of machining. Please if anyone needs work in this area do not go anywhere else but Epicycle. Slightly off topic now my head is back in shape. I want to ask a question regarding carbs. My front cylinder needs the throttle stop ...

Cool...had a timesert installed. Was tuning carbs, still had some backfiring happening. Pulled the plug out and gosh, out came half the timesert, in pieces. Bloody brilliant.

Now calling the timesert guy back to explain what the phuk is going on.

Afraid i now need a new head. Shiiiiit!

D.