G'day all, after a tune up on the last weekend, I got some dodgy fuel and all the carbies started leaking fuel. Whatever was mixed in with the fuel attacked the rubber orings etc. Not happy about that. I synced the carbs and thought, idiot, should have done valve clearances and tension cam chain. Not too worry, started that today with no problems until I decided to pull the plugs as it has been about 18 months and 1500 miles since I put new ones in. I also decided to check as I've just put a set of HM300s on as well so I want everything running right.
Pulled the plugs out, #4 oily #3 rich #1 rich and finally pulled #2. The picture says it all. The insulator tip has moved to the side but it's not loose. The worrying part about this is if you take a close look at the pictures of the plug by itself, it looks as if something has hit it as there are little score marks around the edge and it looks like the tip has been pushed in closing the gap.
Bit of background info: Went for 300 mile ride, dropped down to 2 cylinders working 1/4. Intermittent problem. When cold would run on all 4, warm up back down on 1/4 and consequently when it did fire up on all 4 it managed to put a hole in #3 header due to rust weak spot. Replaced the Dyna S ignition with points and condensers and ran good. Put the HM300s on and gee does it sound awesome. After carb sync reved it a little up to 6k and hear a disturbing sound coming from top left side 1-2 cylinders. Pulled plugs today and there you go. Not sure what the f**k has happened, merry christmas to all, and to all a happy rebuild. I reckon that's what I'll be doing and not putting more plugs in and see how it goes. Anyone disagree with pulling the engine down and taking a look? I need to put a set of rings in it as it's blowing smoke out of #4 and the plug confirms this.
