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About mcman56

  • Rank
    Advanced Member

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  • Bike
    Evo 300 4t

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  • Location
    N California
  • Gender

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9,801 profile views
  1. Lampkins have a couple of pages of recommendations for SSDT preparations. One of these is a piece of foam pushed down between frame and front of air box by the top of the shock on an evo. This will cause it to touch the top of the muffler. How do you ensure it does not melt or catch fire?
  2. A big bore kit was available from S3 for the Gas Gas 125 but I have never seen anything for the beta. Someone suggested that it was just a shortened 250 barrel but trying that on a beta would be a project. https://shop-s3.com/gb/cylinders/244-kit-cylinder-piston-gaskets-head-cover-gas-gas-tr-225cc.html?search_query=gas+gas+225&results=2
  3. Beta evo clutch

    From a theoretical point of view, why would lighter springs create less drag? When you pull in the clutch, the pressure plate moves back a fixed distance creating space for the clutch plates to move apart. When fully disengaged, why would it make a difference if there was 5 lb force or 500 lb force trying to push that pressure plate back in?
  4. I would like to inspect the impeller on a 2016 4t. The manual makes it look like there is a gasket rather than an oring sealing the cover. Is the gasket reusable or should I order another before pulling off?
  5. Please help

    I had a somewhat similar problem on an MR50. It ran fine until under a load but at this point I don't remember if it stalled or simply ran poorly. I found a wire under the flywheel that had rubbed on the flywheel so was kind of bare. It may have been to the points. I taped and moved the wire to eliminate the issue. My theory was that as compression pressure went up, voltage required to spark went up and the voltage would arc to the flywheel.
  6. M7 bleed screw forced into M6 caliper

    I don't know if this helps but I once bought a used Beta that had a round steel ball under the bleed screw of the rear caliper. At the time I did not know if it was OEM or not. I suspect a PO had a hard time getting the screw to seal so added the ball. It did work. I would think the challenge to re-threading the caliper would be ensuring the that the threads were perfectly perpendicular to the sealing surface at the bottom. A ball may help if it was a little off.
  7. Should I buy a 1986 Honda TLR200 that won't start?

    The non adjustable needle was the only smog compromise to the carb. I have not seen one with a cap over the pilot jet like some other street legal bikes. As I remember the carb was exactly the same a a tl125 when viewed side by side at least the us models
  8. Should I buy a 1986 Honda TLR200 that won't start?

    Can you detail the gear box differences? Where do they fit in? Do you have numbers? Carb works fine when tuned properly. All that is needed is a richer pilot jet and adjustable needle. Needle is available from carb rebuilds kits on ebay. Carb on the reflex is the same as TL125 and other 125s like SL125, etc. Although they do not seem as readily available as they once were https://www.ebay.com/itm/HONDA-SL125-SL125S-Carburetor-repair-Kit-KEYSTER-KH-0047/253694458093?hash=item3b115e38ed:g:bOYAAOSw6EhUNWk1
  9. Should I buy a 1986 Honda TLR200 that won't start?

    I believe the internal gearbox ratios are the same. Only the final drive is different. The trials TLR200 came with larger diameter forks, aluminum rims and a much better skid plate plus the lightweight seat/ tank. I think the front brake is different too. The Reflex came with all of the street legal equipment but it can be removed. The larger Reflex gas tank and seat make it a good choice for trails like the Rubicon.
  10. Should I buy a 1986 Honda TLR200 that won't start?

    I agree that it has a plugged pilot jet. It is only about .014" in diameter so plugs fairly easily. Drilling out to about 0.016" (#78) will get rid of the pop and stall. They take an odd pilot jet so sizes other than original can be hard to find. Multiple people in this area ride a Reflex in trials. I have done it too. They are no modern bike but are fun to ride and very quiet. The only change really needed is lower gearing. A 9 tooth front with the OEM rear works well. But in addition to old technology, they are about 50 pounds heavier than a modern bike.
  11. Beta Rev-3 270 rough running? Petrol Info?

    That is what mine does. I think many bikes do it to some extent but mine was the worst. Advice on line suggests an air leak in the exhaust system allowing air into the pipe that then causes un burnt fuel to ignite in the pipe. I went as far as bubble testing the pipe under water and fixing all pin holes but it still does it. I also notice a little pinking when rolling along with the throttle barely cracked open and suspect these are related. It does not pink under any other conditions and other wise runs fine. It did the same thing with a mikuni and keihin jetted rich or lean although rich jetting did reduce the popping. It sounds like some KTMs do something similar It looks like you are missing the skid plate.
  12. 4T Carb Tuning

    I had a 130 main so went to 25 and 130. Clip is at 4th position. Spring looks silver. What spring is OEM? What is the blue spring for? It is lighter for quicker opening? I have ridden at sea level and 5500 feet and ti seem sOK
  13. 4T Carb Tuning

    I have been through the carb and tried different jetting plus have the adjuster screw. Initially, I had to run a rich idle to prevent bogging. Once I raised the needle, the bog tendency went away so I leaned out the idle. I'm now running a 22.5 pilot and since the symptom is lean will go up one size to see if improves.
  14. 4T Carb Tuning

    Thanks for the responses, it seems like this means lean.
  15. 4T Carb Tuning

    I have a 2016 300 with the standard pipe and muffler. I have adjusted the jetting and it runs great with one exception. Occasionally, when opening the throttle from idle it will stall. It does not pop through the intake but instead you hear what sounds like fuel burning in the exhaust. It sounds very similar to a gas barbecue being lit. This happens at lower idle settings, below 1200 rpm. At higher settings up above 1400 it does not happen. Is this rich or lean?