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About scifi

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    N Wales
  1. Yes 99.3% of riders will not notice anything. However what actually happens when you apply lots of power..? The chain becomes tight on the top run, which tends to lift the rear wheel, and make the bike squat. The push from the tyre, at ground level, acts on the centre of gravity of the bike, and causes the front wheel to lift... Wheely...! Some old bike had Plunger rear suspension, that moved the wheel vertically, as that was considered to be better. Some had rigid rear suspension, and could only be ridden by Yorkshire Men. .
  2. My Beta 300 has a very abrupt clutch, which I made a temporary cure by taking out two of the 6 springs. This however makes the clutch slip in top gear at maximum throttle. So I have made some stepped clutch washers, which just slightly reduce the clutch pressure, which I am going to fit soon. Maybe you need less spring force as well, so pack a small washer under some of your spring bolts, but not so many that the clutch slips in top gear. .
  3. Had a sticky cable on one of my bikes, and rather than get a new (expensive.) cable, I decided to try oiling what I had. I put the nipple end into a drill chuck and span the inner cable slowly, whilst dripping diesel into the other end. It took a lot of time and about 5 teaspoons of diesel before anything emerged from the bottom end. The first drips where really black, but after a few tries the diesel would pour easily down the cable. Then I put some normal oil down the top, and the cable was really free then. Hope this helps...
  4. Good point about drying out the main bearings, but this is a 4 stroke, so won't have had its crankcase filled with water like is possible with a 2 stroke. Any signs of life yet...? .
  5. We totally drowned a Sony Radio once, fortunately in clean water. We dried it with a hair dryer, then left it in the airing cupboard for a week, it then worked perfectly Ok. So as long as all the moisture is out of the electrics, and there is no muddy residue, you should be Ok. .
  6. Suggest you take them off and show them to your Bearing Shop, they will measure them Ok. Nearly all are metric these days, and go in even number of mm sizes. These shops mostly deal with ball-races now. When I wanted 120 individual 3/8th ball-bearings, they had to get them in by special order.
  7. Even one blob of water could cause those symptoms, as it will block the very small jets (maybe not the main jet.). Had a Commer Van that had a loose petrol filler cap, when it rained the water got into the tank. The van would slow, but there was sufficient time for me to lift the cabs engine cover, and put my hand over the carb inlet, to suck the water through the jets, before we slowed to a standstill. .
  8. Hi Zippy, that seems like a good idea. Does it mean you have events with more than ten sections..? I remember many years ago, that the only incentive to marshall any motor event, was that you got to wear a Doctor's white lab-coat and a Castrol Arm-Band.. Now quite a few events here have catering services, and the helpers get a free meal ticket.. i.e. a Beef-burger and cup of tea. ( I think having to wear a Day-Glo yellow jacket can be a big dis-incentive.)
  9. For our National Lomax Trial (April 2nd.), we have no problem getting observers, sometimes two per section, if it's a big section, or Hillclimb. Also lots of other helpers for signing on, starting, Route marking and Photography. It's just the smaller events where observers are scarce, and riders have to pass the score-sheet. I was at one trial on closed ground, where on a very complicated section, there was always 35 to 40 riders queuing. Several of us missed that section on laps 2, 3, and did it three times on lap 4..
  10. Yes limited number of observers, and difficulty having helpers set out more sections, is a problem. But... All this Steam from Moorland Mud, and oily Carbon Monoxide, can't be too healthy..! .
  11. Back in the past, when all trials were road trials, and we had 40 separate sections, the only time we queued was at the first few sections. After that we were all separated and could just ride straight into the sections. We sometimes waited for our mates to catch us up. Also the observers from the first few sections could man the latter in the day sections as there was time. Nowadays with just ten sections done 4 times, there is always queues... Mathematically, for an event with 100 riders, there will be 10 doing sections, 10 riding between sections. The other 80 will be queuing. an average of 8 per section. A local club just ran an event with 3 laps of 15 sections. So for the same 100 riders, this could be 15 doing sections, 15 riding between sections, and 70 queuing, an average of under 5 per section. For a 20 section course, done twice, the queues would be just 3. .
  12. Looking at the fracture line on the piston, there is a good amount of carbon on it, so that didn't happen in just five minutes. It could have been caused by something jamming in the exhaust port, many months ago. Or that the piston was dropped on the floor on its edge, during initial assembly. .
  13. I think you have the 'Getting onto the Tyres' bit nailed, but you are stopping at the top. I also ride Classic motorbikes and my Classic Club uses the 'non-stopping' rules... So that would be an instant 5 for you. Even in Stopping Allowed rules you would get either a 1, or a 3 if you put both feet on the floor. So maybe try it the other way around, or use a plank onto the tyres, so that you concentrate on getting off the tyres with the front wheel under control. In some of the National trials, sections such as 'Pipeline' will see these rocks coming at you thick and fast, so you really need to keep the front wheel under control, so it does not dive into the bottom of the next rock. You need your front wheel to meet the top of each rock, big or small, so that it causes the least amount of resistance to forward motion. To practice Wheelies, I have a Willow tree in my back garden, and it has fronds dangling from it. I choose a frond that is 5 foot from the ground, and practice hitting it with my front wheel... straight up, then straight down again... the bike hardly moves forwards. You could try dangling a Tennis Ball from a string, if you haven't got a Willow Tree.. Best of Luck, please join a club and enter some easy trials ..sooooon..... try... .
  14. If you can free your clutch by just rocking it back a bit, you are lucky. Most need a few hundred yards in 3rd or 4th before they free at the start of the day. The front forks have an Allen Screw adjuster for weight on the left, and a screwdriver 30 click adjustable damping on the right... weird but that's how they do it. I suspect that the rear shock is also adjustable, but I havn't altered mine. .
  15. Must admit I have seen worse slides... Ones with the back edge worn to paper thickness, which still performed Ok. The only thing that worries me is the up'down scratches. They appear to be made by Big Grit Particles. Is your air filter working correctly..? .