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Teds new project a CB500 K1 mostly version 0.5 circa 1972.
McCabe-Thiele (Ted):
Happy to report that today I have finally finished cleaning the Carbs with a couple of stripped bowl threads now Helicoiled.
Carbs back on the bike followed by the usual Rubics Cube Puzzle that is getting the air intake box back in the frame. Spent a lot of time fitting the air filter box and battery box as well as a couple of inline filters to the carbs.
I've run out of energy but not enthusiasm for today so probably the weekend before I have her running again. ;D ;D ;D
Laverda Dave:
Good to hear you are back on it Ted 👍
K2-K6:
Hopefully you'll be up and away with it Ted.
The question you posed in discussion about jet size etc, after cleaning .... it shouod be in the capability of the settings to cover that off with the screw in modulation.
I'll emphasise the point I was making, that with cleaning, any other impairment, current fuel with or without Ethanol etc, then the "factoryy" set of X turns out, plus fraction :) will unlikely be a defacto std, just a competent start point.
It should give two very divisive outcome. A no heat cylinder, meaning no fuel flow in that jet almost certainly. Or the opposite, in that you now have to turn that airscrew further out to get the setup required. The second scenario will define its wear etc by you recording the full amount of turns to get mixture in range. Really speaking, getting towards a verified three turns out would show just too much flow to be reasonably controlled by hardware in place ..... that causing you to question the jet accuracy.
You can do a quick functional test just with putting carbs on without the airfilter etc to simply assess IF the idle system is both giving fuel (no cold cylinder) and can be "ranged" by turning the screw to observe response. It doesn't need full installation to check that aspect, should you run into problems, but if verification of function checks out, then complete the work to fully install induction system and go to final tuning.
McCabe-Thiele (Ted):
Interesting info K2-K6, a tad too late in terms of fitting the air filters etc as they are in place.
I fired up the 500 about an hour ago - pleased to report it is running on all four cylinders again.
Only done the tentative burn test on the manifold with my fingers running pretty nicely with all four air screws set at 1.5 turns out (air screws are the drilled 500 type).
Packing in for today - planning to set the dynamic timing before I start assembling my newly painted petrol tank over the next few days.
McCabe-Thiele (Ted):
Done quite a few things today, Petrol Tank Cap & Catch fitted to tank, new mounting rubbers in place. Chain guard fitted, Dynamic timing checked. At this rate it will be ready for a test ride soon.
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