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[Adrian]

Another thing that might help with the magneto - use the yellow and black sleeved HT lead with a heavy duty copper core, as used by classic racing bikes. I can't remember if our hosts sell it or not, but Rex's Speed Shop does.



http://www.rexs-speedshop.com/epages/es ... HTHP-Y/BLK"



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[Mark M]

Marko, at the risk of stating the obvious (and I suspect you already know this,) remember the mantra when trying to fix a problem with complex symptoms, 'one thing at a time'. And I do sympathise with your situation, an apparently restored but faulty machine often needs taking back to standard to eliminate problems with all the expense and grief that that entails. Good luck bro!

REgards, Mark

[Marko]

I honestly don't mind being reminded of basic or obvious things and do appreciate all of the advice given, so no worries there. I've a sneaky feeling that most of the people here are REOC members.i may have said this before but I have landed amongst a nice bunch of people - make sense? The weather looks like its going to stop road tests for this weekend but I do have a plan of action and I do promise not to throw or threaten to throw hammers at inanimate objects! I'll keep you posted, thanks for the help so far, best regards

[Marko]

I've checked the mag for a spark this morning with an old spark plug "chopped" as Dennis suggested previously - I get a nice blue-ish spark jumping the gap - so that is a step in the right direction. It also means that the problem is more tha likely a fuelling/carb issue... i'll get there

[Paul G]

Probably talking poo here, but going on Vince's thoughts about fuel starvation, is it possible that replacing 2 carbs with one means that now the 1 carb is feeding two pots, rather than 1 carb per pot the float chamber is emptying faster than you can fill it under hard acceleration causing fuel starvation and weak running and cutting out. Maybe making an existing partial blockage more obvious. 2 float chambers would have a greater supply of fuel in the carbs to draw on.

[Adrian]

There were plenty of twin cylinder British bikes running happily on single carbs, just a question of having the right settings, which I think is what Marko said he's checking next. A.

[Marko]

An update: the ignition needed sorting, though I had what I thought a good spark it wasn't reliable & all over the place, anyway I managed to sort things out & now have a one kick start bike with an ignition that advances or retards when told to do so by the lever. It ticks over sweet as nut. Next on the hit list was fueling issues - a possible contribution/culprit to my bikes behaviour was the float level in the carb & fuel supply - the float level was low! - so that was sorted. A 3.5 throttle slide was fitted instead of the previous 4. The bike now runs so much better, in fact it feels like a totally different beast. I have yet to do a proper roadtest but the results so far are very encouraging. Last item on the hit list is fine tweaking of the carb which I should manage to nail with a few roadtests & plugchops (do you mind if I come back & pick your brains? just in case;)this bike has not been straightforward since the day I got it!). Things are going to have to wait for a while though as mum has some work earmarked for me that I cant wiggle out of! I'd like to show you some photos now that its behaving itself but don't know how? If any of you are members of Realclassic or Brit M/C Mechanics on FB then I've posted some photos there. All the best & thanks for the help, best regards Mark

[Dennis C]

I just had a look at the pictures Mark, it looks a nice bike, and good that you found the problem, just one little tip, the front brake cables look like the one's I had on mine, they are too long and do nothing to improve the brake, I shortened mine and it improved the brake no end.

[Marko]

Final update: all is well, fingers crossed, carb is now running a 3 1/2 slide and a 210 main jet, the ignition has been "tweaked" (I cheated & fitted the Thorspark), bike now runs perfectly (even more crossed fingers!), best regards Mark

[Adrian]

Vroom, vroom!



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