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bigmike1961

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  4. Sy 250 With Sticky Choke Plunger

    in Scorpa

    Posted · Edited by BigMike1961

    I can do a trial on about 2 or 3 litres of fuel, no idea what that is in miles though, we usually run 5 laps of 8 sections.

    My choke lever is quite stiff too. Plug needs to be cleaned after every other trial stalls unexpectedly otherwise.

  8. Rendezvous With French Mistress

    in Scorpa

    Posted

    Check the fuel line before tearing into the carb again, is it pinched/kinked?

    Does fuel flow from the pipe when disconnected at the carb end?

    Is the float height correct?

    Is the float in the right way up?

    Be careful with compressed air - I once collapsed a float with a poorly conceived plan to blow out the float valve without disassembly by directing air down the fuel line. 80 psi WILL collapse the floats and they won't ...well float so well :wall: , or stop fuel flowing into the carb, which will flood, Etc.etc :crying:

    Have fun. :beer:

  12. Fan Cutting Out / Also Overheating Prob

    in Scorpa

    Posted · Edited by BigMike1961

    If the fan is working properly it won't do that.

    It should kick in when the coolant gets too hot and turn off again when the fan's done it's job.

    Either the thermostat is bad, the connections are dirty on the thermostat or elsewhere, or the wiring is bad somewhere.

    On my scorpa there is a connection under the seat, 3 wires in with a white connector, the two outer wires are connected by a simple loop, that connection was poor - I ended up bending the contacts to ensure good continuity.

    If the coolant gets too hot it will boil. You should have a black plastic tube from the top of the rad cap to take overflow away down to the bash plate area. I have the pipe pointing outwards to make the escaping steam obvious.

    I carry a small jumper wire to bypass the thermostat and have the fan permanently on incase he thermostat doesn't cut in.

    Hope this helps.

    • Like 1

  23. tlm 200 tick over

    in Honda

    Posted · Edited by BigMike1961

    Spark plug wet still suggests flooding - I have a Mikuni carb that I have never been able to get right on my Montesa and symptoms sound the same - try this - before starting for first time - turn the fuel on until you are confident there is fuel in the carbie - then turn the fuel off and try and start it. If it starts let it idle for 15-20 seconds then work the throttle - if it behaves ok and stays ok until the fuel runs out then you have the same problem I do.

    Now for the bad new - if I knew how to fix the problem I would be using the Mikuni now. I have tried jetting and levels and slide clip positions and still can't figure it out - can you borrow another carb from someone to try out?

    Of course if the above is the case then you can simply buy a replacement carbie because at least you know what the problem is.

    Is the float valve leaking? :wall:

    Is the TLM back from the bike doc? Any diagnosis? :marky:

  24. tlm 200 tick over

    in Honda

    Posted

    When it won't go after the 6th kick is there still a spark? (cdi good)

    Is the wiring all in good condition? ( once had terrible trouble with an XL185 engine because the pulse generator wire was worn.)

    What is the plug like - wet with fuel or dry? ( over rich mixture )

    What happens if you turn the fuel off, take the plug out & spin the engine over to clear any excess fuel? Will it start again?

    In the opposite direction:-

    Is fuel actually getting to the carb in sufficient quantities? (blocked fuel line, filter or fuel tap) Take the fuel lie off the carb and make sure the fuel floods out with the fuel tap open.

  
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