Spriddler,
Thanks for comments.
I've triple quadruple bazillionuple checked timing and is spot on at 1/2" BTDC @ Full advance.
My exhaust header pipe is the 'narrow' diameter one that flares to fit the head. It is the smaller diameter one as it has to fit over the foot rest and under gearbox. Strangely, my '56 has large diam pipe all the way, but has an AMC box so different fit i guess. The '56 pipe does not fit on my '55, I've tried. My silencer has a baffle, but previous owner cut a big hole in it so, basically it's open. I'm not sure if the header blues, as it is ceramic coated, and does not show anything, and there's too much oil residue in the pipe to know if there's carbon in there or not.
I'm pretty sure it is running stock gearing. I've checked this before a while ago, but will check again over the weekend. I know it doesn't really like taking off from stand still half way up a hill. 18T Engine and 16T GB. Again, I'll check this.
Pretty sure I've gone over the Carb, as I went though this with my engineer, who had lists of carb settings that I'd never seen (from the factory). My manual states that 'all spring frame comp models' were fitted with TT carbs, but does not state settings. It does say though, the rigid frame Comp models had 389 with 260/30/#3 slide/106 and central notch. My 389 is set to that, and was, but my engineer said it must have been running too lean, so thats when we ended up with the 400 main. It does go a lot better than what it did with the 260.
I run a bosch clear tapered fuel filter on one line and only usually open one tap.the filter is always full, so wouldn't have thought there would be restriction in flow? I did have vapour lock issues once, but then drilled out the hole in the fuel tank cap, and never had that issue again. I do run a small 'pancake' air filter from Hiscocks too, but one would think this would only richen the mixture. I could, and might however, run it without over the weekend to see what happens. (@ full advance)
Strangely, after the rally this weekend just gone, my return ride to camp, the bike missed a bit for around 1/2 a mile, came good, then I tested at full revs, under hard accel, and it missed again multiple times. Since, this week, I checked timing again, and looked in the plug hole to find little flakes of shiny metal on top of the piston. Not sure where that came from, and don't know if it's sinister or not. Plug also has some foreign particles on it.
The bike does smoke on over run, and I've never been able to stop that since owning it. I've shut off the valve feed, had guides checked by a head guy, re-lapped etc... and obviously had 4/5 rebores and pistons with new rings. C'Case breather works fine, actually spews oil everywhere, and does drip from there when parked.
The bike uses loads of oil, always has. I can't seem to get to the bottom of that either. When I say loads, I mean, 100ml per 100 miles. It'll also smoke if I gas it and change gears, but not really smoke while cruising along.
Dunno. I seem to be more hairless since owning this bike. It kicks my arse at every opportunity. I try and do everything right, but it just keeps kicking me.
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