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Help SoulJets Megelli Issues

Discussion in 'Megelli 250cc' started by SoulJet, Aug 3, 2015.

  1. SoulJet

    SoulJet Member

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    Thanks risky, that's interesting. Mine came with the champion plug. All hands on at the mechanics shop tomorrow. Will post how we get on.
     
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  2. SoulJet

    SoulJet Member

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    Hey folks, played around at the mechanics all afternoon today. We received a direction from the importer here to set the clearances to 2-3 thou on inlet and 4-5 thou on outlet. That was what the bike had and we decided to follow what we are told not to void the warranty. Reinserted the camchain tensioner also. Not 100 percent yet if the noise has changed but it seemed quieter on the way home. One thing we did notice though is that both of the rockers can move sideways freely about 3mm and make a bit of a knock so that could be a possible source. No amazing discoveries unfortunately. Filling 98 did not seem to make any difference.

    Will post after a bit more testing.
     
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  3. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    The side play on your rockers could be the source of the noise.
    Many years ago I worked on a BMW R100 that always sounded like the tappets had 1/2" clearance. After many attempts at stopping the noise with valve adjustment, I saw an article in a magazine (two wheels I think) about BM's having slop in the rocker arms causing valve noise. I shimmed the rocker shafts with some washers and noise gone.
     
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  4. risky

    risky risky

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    funny how different importers have different settings.niether of mine would start when hot and had 2 thou clearance.
     
  5. risky

    risky risky

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    HAS YOUR PROBLEM BEEN FIXED AND HOW?
     
  6. SoulJet

    SoulJet Member

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    Hey Folks, very sorry for such a late response. The thread changed its name and all the messages I wrote disappeared in the original thread where I posted, so i though they were all deleted by the admin because the issue was not sorted or whatever reason. Just discovered this thread now. Been very busy and since got a Kwaka ex300a for a bit more grunt and more ability to pull wheelies from the lights. Megelli stands under a cover in the back yard waiting to go up for sale after some minor repairs.

    After putting some miles on the bike, I have to say the noise has reduced. It's not as noticeable anymore but still.

    The mechanic has suggested to put wave washers in to stop the rocker sideways movement because he has seen that done on some model cbr's. Is that sort of what you did Murdo?

    Once the run in period was over though, I started pushing the thing a bit and discovered it misfires in the high rpm under load. If I accelerate slowly to the high rpm, it's mostly fine but when I turn the handle suddenly in the rpm range above 6000 the thing just spits and farts fairly frequently and when it does that - no acceleration obviously. I thought it must be the carburetor setting. What do you guys think? Too lean?Too rich? It pulls through the lower rpm without trouble. Also considered that the spark plug cap connection to the plug is a bit naff and could be disconnecting due to vibration? Could the problem be from too early timing? Late timing?
     
  7. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    A wave washer will still give some movement but should stop the 'clacking'. I used a solid washer on the BMW.
    Fix the plug cap problem and see if it still does it.
    Try flicking the choke on a bit to see if it goes better. If so, it is too lean and will need a bigger main jet.
    Don't think the timing will be your problem.
     
  8. risky

    risky risky

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    change the FUEL TAP. current one is vacuum operated-defunct importer here put a normal fuel tap on and blocked the vacuum hose off due to fuel starvation problems.
     
  9. SoulJet

    SoulJet Member

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    Thank you for the input chaps. I think we will try a washer either side of the rockers with the mechanic.

    Risky, the fuel tap it has at the moment is one of those cheap turn handle ones and that's what the bike came with. Is that the fuel tap you are talking about or is mine different?
     
  10. SoulJet

    SoulJet Member

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    There are two lines going to it. Is one of them a vacuum line?
     
  11. SoulJet

    SoulJet Member

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    Where does the vacuum line come out of? The fuel tap is just a conventional one with a turn knob without a vacuum line. The second line is tank overflow. I am wondering maybe the vacuum line is not blocked off so what does it come out of?

    Also looking at the carby, doesn't seem like adjustment screws are on there at all. Could it be a fixed setting? Are there adjustment screws for air and fuel on those Risky?
     
  12. risky

    risky risky

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    if the fuel tap has 2 lines coming from it THEN ONE OF THEM IS A VACUUM LINE FROM THE INLET AND ONE IS THE FUEL LINE TO THE CARBY. TAKE THE FUEL TAP OFFFFFFF AND REPLACE WITH A NORMAL ON /OFF TAP . will fix your starvation problem.put a ball bearing in the vacuum line to seal it off.
     
  13. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    The vacuum line goes to the intake manifold between carb and engine.
     
  14. SoulJet

    SoulJet Member

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    Risky, just checked to make sure, the fuel tap only has one line going to it. The other one is at top of tank and is a gas overflow which runs down the frame to drain off near rear wheel. If vacuum line is not blocked, could it cause the problem?

    Since it's not the fuel tap, is it fuel mixture?

    Thanks for all the help folks
     
  15. risky

    risky risky

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    carby sealed at the factory so would be a warranty issue. as the tap has only one line to carby the importer knows of the issue. dirt in filter?
     
  16. SoulJet

    SoulJet Member

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    There was a whole saga about the bike and warranty. Turns out the c*nt dealer that sold it to me had an arrangement with importers that these bikes don't get sold as new or under warranty because they were repaired returns. The bastard bought them from importers for peanuts and then sold them as new under warranty not complying to the agreement. I got a compensation from importers and the warranty is kissed goodbye.
    Just want to solve the issue now so it can go up on the market.
    Tried removing the filter whatsoever but no noticeable improvement.
     
  17. risky

    risky risky

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    ok. the importer flogged a put together piece of crap.problem could be anything ranging from in tank filter to crap in carby to loose valve seats to????ok, back to mechanic- could be computer,plug, coil,carby.carbies on my bikes are sealed as far as i can see.check air filter under seat and while at it tank off and check tank filter and overflow not blocked. then off with plug and new one plus check plug lead.then the head is next step. good luck. a new motor is about 650$.warranty was an issue here in australia.computers had several upgrades in production life with cylinder head changes.
     
  18. SoulJet

    SoulJet Member

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    Cheers for the input Risky. I noticed there is what looks like an adjustment screw looking from the left hand side of the bike on the carby near the bottom of the pipe of the carby outlet in a cylinder like threaded hole. Do you think that could be a mixture screw?

    I test rode the thing today and noticed the fuel level in the fuel filter on the line from gas tank goes up and down. That shouldn't happen right? The filter should be full all the time, yea?
     
  19. risky

    risky risky

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    there should be a constant flow so undo the tap on the lhs of tank.the nylon internal tank strainer may have gunk on it. also put a new filter on the fuel line with the arrow facing the carby.
     
  20. risky

    risky risky

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    lhs of carby i have a big plug but no idea as to what is behind it. a seller of pit bikes may help you.
     

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