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About feetupfun

  • Rank
    Advanced Member
  • Birthday 01/18/1959

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  • Bike
    1963 to 1981

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  • Location
    Gladstone Australia
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  1. Graham, George did mine by using a milling machine to enlarge the hole and then welded in the aluminium insert that I had bought from Keith Lynas. He said next time I needed one done, I should consider cutting a bigger diameter thread in the cylinder and make a new steel nut (male piece) to suit the bigger diameter thread.
  2. Definitely is louder than the clubfoot
  3. The manufacturers choose the location of the rear axle to give the best handling overall. If you only ever jumped up things, the ideal location would be different. So would lots of other things on the bike be different. As far as the slot goes, it is there so you can adjust the chain tension. Yes you can change the handling by having it at the back compared with at the front, but it is only a very small difference and 99.9% of riders would not be able to tell the difference just by riding the bike.
  4. It sounds like you are trying to turn like you were still on a modern bike, and it isn't a modern bike. The techniques required are quite different.
  5. Ty175 can suffer from a pitted/worn surface on the camshaft which could cause it to engage more suddenly than normal. The pit forms where the pushrod rubs on it. I agree with Carl Ekblom that the condition of the plate driving surfaces on the basket and hub are very important for progressive engagement and is probably the most common cause of poor engagement and disengagement on TY175 clutches
  6. I would include lower shockie mounts on that list
  7. More is not always better (280 vs 325) If a 250 needs a rebore, it would not cost anything extra to make it 280 if you do it at the time
  8. I don't think I've ever heard of a 348 that hasn't developed a frame problem with use. I've got two bent 348 frames (I think from frontal impact) and one really rusty 348 frame that might be bent or cracked but I haven't looked. A friend originally from South Africa rode a 348 in trials over there that someone had modified the steering head angle to INCREASE the rake to make it a better enduro bike (in their opinion). Seen plenty with cracks near the headstock too. The lower shock mounts on my ride 348 are 1/2" UNC bolts that someone welded on in place of the elegant (but obviously not strong enough) original shock mounts.
  9. There is a law of diminishing returns when painting something black because all paint acts as an insulator, so while a single thin coat of matt black may well increase the efficiency of heat transfer compared with bare metal, above a certain thickness of paint, the overall heat transfer efficiency will start reducing
  10. Just thinking, a 2mm liner makes for a nicely lightweight cylinder assembly although I see the latest thing in old bikes is to use a coated aluminium liner
  11. By having a factory in Spain, Honda saved a fortune in taxes on the little road bikes they made there that were so popular in Europe, compared with making them in Japan
  12. Does anyone know why they went away from the removable frame elements? Being able to take the LH stay off to work on the carby is one of the things I like about my 348.
  13. The reason that an ideal points gap, or an ideal range for the gap to fall within is specified by the manufacturer, is because the sizing of the capacitor is chosen to match that gap (and the area of the contact surfaces of the points). The actual gap is not particularly important in the scheme of things, but the position of the piston/crankshaft when the points start to open is very important. On some bikes you can rotate the backing plate or change the points gap to adjust the timing and on other bikes you can only change the points gap to adjust the timing. As you move the backing plate away from the mid position in either direction, the voltage being generated in the stator coil (the primary circuit) at the time the points open will be (slightly) lessened, compared to if the backing plate is in the mid position. This means that if you want the strongest spark, keep the stator near the mid position and get the timing right by adjusting the points.
  14. If you want an easy way to ride your Cota at night and don't need to get road registration, you can use a cheap LED light bar that will fit across the front of the fork tops, do a great job of lighting the way and not be sensitive to voltage. Bikes like yours can be started with the de-compressor engaged, if you use the type that are fitted to some chain saws. This type are "cocked" by hand prior to starting the motor, and as soon as the motor fires, they snap shut automatically. A friend has fitted one on his 325cc Italjet in an effort to prolong the life of the notoriously weak kickstart shaft, and it works beautifully. No good as a kill switch though!
  15. Yuk