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2 kickers
Jan 7, 2023 13:09:39 GMT
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Post by BritPete on Jan 7, 2023 13:09:39 GMT
I would squirt some quick start in the carbs and see if you can get it to fire
Take the filter out and squirt down the intake from within the air box
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2 kickers
Jan 7, 2023 14:44:32 GMT
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Post by duffer on Jan 7, 2023 14:44:32 GMT
I am with Pete on this one. I have also coaxed them into life with a little fuel down the spark plug hole.
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Post by sandy on Jan 7, 2023 17:02:27 GMT
Ok, update. took the above advice, bike started and ran/throttled up great with the easystart in the system until the easystart is used up. I then have a bike idling at around 1k on both cylinders, sits like this for ages but if I touch the throttle it just dies.
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2 kickers
Jan 7, 2023 19:23:44 GMT
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Post by johnjones on Jan 7, 2023 19:23:44 GMT
Hi sandy, thank you thank you thank you.
All the very best for this brand new, if a week old now, new year.
I have not read your whole thread but will during this evening.
I assume you have plenty of petrol in the tank. Fans, 12 volt it mains powered are good for cooling the engine during longish idleing engine runs...
Yes I know but test runs rather than sitting at traffic lights.
I presume you cleaned the carbs starting at the petrol cap, and did a flow test of the tank with the cap on ?
Reluctant to start due to fuel ?
You know what's coming next, but if you can remove the float bowls ( Allan bolts ) with the carbs in situ, and the dash pot pistons, an easy in situ carb clean can be done,as the floats, emulsion tubes, bung etc. ( I tend to leave the idle mixture adjust screw in, but unscrewed until they are free of the carb thread, then screw back in two turns, so no problems with that tiny o ring, tiny washer and small spring ) can be aerosol cleaned or compressed air/cleaner spray Lance.
What cc is this bike ?
You know of CMSNL for the good exploded views ?
JJ.
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2 kickers
Jan 7, 2023 19:29:13 GMT
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Post by johnjones on Jan 7, 2023 19:29:13 GMT
By the way, the drain screws have good o rings ?
Clear plastic pipe pushed onto the drain stubs and positioned into a u bend, turn on fuel, open drain screws say one turn, watch fuel level and compare...
I assume float chamber local atmospheric vents are clear ?
It's a little difficult to fit the floats upsidedown, but some have managed that, also incorrect needle valves...
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Post by sandy on Jan 7, 2023 20:17:15 GMT
thanks for the guidance JJ. It's a 250 . I have ultrasonically cleaned these carbs and fitted a refurb kit prior to installing them. I already checked the drain as you suggest and both are good. Carbs seem to be getting fuel Ok, no leaks or overflow. Just swapped them out anyway with a pair I know work perfectly, result exactly the same. Only thing left for me to suspect is the fuel. I have now drained the tank of the rather old fuel that was in there (with the cap on or off, the flow of fuel was good). will buy some super unleaded (E5) tomorrow and try again fresh.
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Post by johnjones on Jan 7, 2023 20:42:19 GMT
Old fuel does not "ignite" as readily as fresh...
Modern fuel goes off relatively quickly.
I would remove tap and filter and flush tank. Clean tap and filter.
Much rust in reserve position "sump" in tap ?
Air filter element fitted and serviced properly with excess oil removed ?
I am going to assume no air leaks between carbs and head and carbs to airbox.
Black floats have needle valve with clip, they are adjustable. None adjustable pre set white floats ( now orange colour ? ) Have a slotted needle valve. See CMSNL carbs exploded view.
Again I assume oe air box and not "cones".
Engine revved ok ( over 5k revs ) on easy start ?
Easy start only for testing...
Probably new fuel will be the answer, hopefully.
Will look in tomorrow evening, busy day tomorrow, off flying.
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Post by sandy on Jan 8, 2023 11:42:43 GMT
It's Alive!
Fresh fuel and it fired right up, doesn't want to idle but revs up fine. just needs some fettling to sort out the idle etc.
As usual with me it wasn't as simple as that. I took the float bowls off the carbs I swapped out and found they were full of crap. confused, I removed the fuel tap from the tank and discovered that there was no filter fitted, just the straw. that explained how the debris got into the carbs. left hand main jet was completely blocked.
I fitted a filter from another tank, after giving it a good clean.
I will be sticking the carbs back through the ultrasonic cleaner then swap them again and check the other set.
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Post by sandy on Jan 16, 2023 12:45:56 GMT
another set of carbs fitted, bike now runs well throughout the rev range and idles well. I thought that was it until I put it in gear, can anyone guess what I have been doing? that'll teach me not to leave the engine lying for 2 years and expecting everything to be fine. the clutch is now free and working well. that's about it, the only thing to be done is to refit the front brake and this thread is finished. it's a long way from the bike I picked up in Wales all that time ago, not perfect, but it'll do for me.
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2 kickers
Jan 16, 2023 15:28:27 GMT
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Post by BritPete on Jan 16, 2023 15:28:27 GMT
Great job we’ll done
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2 kickers
Jan 16, 2023 17:08:05 GMT
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Post by johnjones on Jan 16, 2023 17:08:05 GMT
Hi sandy,
Clutches stick as do valves...stuck valves if not checked and freed will result in a disaster that will be extremely expensive ...
It's wise and good practise ( solvent/flush via pressure washer the oil pressure switch area that "collects" grit and crap which falls over the primary gears on cover removal ) , whilst the clutch cover is off, is to check/reset the adjustable adjusting balance chain adjusting quadrant adjustment.
You know the relevance of that tiny but oh so important DOT on the end of the balance shaft ?
It's also good to flush out oil sump and kick start oil trough, as well as the clutch basket and parts. The clutch basket fingers inner surface act as a crap trap, a centrifugal crap catcher if you will.
Best is to remove clutch and clean but with a good plentifully supply of solvent, the clutch can be cleaneg in situ.
As in picture, with oil pump chain removed, and sufficient oil in the sump, it is possible to prime the oil system by hand rotating the oil pump sprocket.
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Post by sandy on Feb 14, 2023 14:33:11 GMT
the last piece caliper rebuilt with new seals. just waiting for a few bits, pad pins, pads, screw, banjo bolt etc.
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Post by sandy on May 20, 2023 12:40:21 GMT
OK this thread was called '2 kickers'. so I think now that they are both nearly finished, I should end it with a couple of photos. Still some bits to replace on both bikes, which I will do when parts appear at the right price. for now, both start run and drive, and don't look too bad either. Now my thoughts are turning to which one to do next?
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Post by buster on May 20, 2023 12:54:21 GMT
looking good
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