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About trialsrfun

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  1. I too have a 22mm Dellorto on my Cub but I keep hearing how well they can run on a smaller choke size carb usually a china made mukuni copy, many othes who have tried them though revert back to Dellorto or Mikuni. Fitting an Amal carb appeals but only if there is a performance improvement to be had. Ironically the Cub as far as I know was never fitted with a concentric carb as production ceased around the time the concentric was launched.
  2. Have a look at 7/8" trials bars on the renthal website, you will see the different bar shapes and dimensions there.
  3. Any one tried an Amal Premier 20mm carb on a 199cc Triumph Tiger Cub, would welcome your feedback please.
  4. Any one seen or got a WES alloy silencer yet?
  5. Good to know that feeling crackered on a monday has positive health benefits.
  6. The advisory team at two oil companies we deal with both said stay with the machinery manufacturers recommendation of a GL4 spec oil because there was a much lower level of EP additives present than in a GL5. The machines in question are both current, from different manufacturers, the handbook to one says use only a GL4 spec oil, the other use a GL4, in countries where GL4 is unavailable a GL5 may then be used. Both manufacturers prefer a GL4 oil because of the lower level of EP additive present.
  7. ATF is a good choice for the primary drive but I would not use an EP oil in the gearbox. EP stands for extreme pressure additives these are intended for use in applications where all steel bearings are used and there are sliding gears as in a crown wheel and pinion. EP 90 is a GL5 category oil and should not be used where yellow metal bearings are fitted, these are the brass, bronze or copper bushes and shims that are often found in motorcycle gearboxes where a GL4 spec oil should be used. The EP additives stain these bushes which is surface degredation this is then eroded away on the bearing surfaces. I have done a lot of fact finding on this very subject for an industrial application, there is a lot of information about this on the web.
  8. The top of the climb which was hard to see on the video looks even steeper than the main hill, very popular with the spectators too.
  9. Pre unit and twin power certainly gave the best showing, trials at its best.
  10. I think you are right Guys, on second viewing it does sound like a twin. Tried freezing the picture but not possible to see details.
  11. Thank you Guys that was a very enjoyable watch. Who was the rider on the white tank bike, was it a two stroke hard to tell when it flew by.
  12. If you really want to know what the ACU and AMCA do then why not write or email both organisations and please share with us their reply to you.
  13. I fail to understand why the two organisations ACU and AMCA are getting such negative comments, without them who would represent us at national level to whoever happens to be having a dig at motorcycle sport, who would keep an eye on changing legislation that could affect our pastime or assist in legal matters when problems arise. It is easy to complain about this or that maybe justifiably sometimes but both bodies are needed especially when dealing with the likes of defra.
  14. The system sold by InMotion/Dave Renham is very good and well proven.
  15. It really depends on which trials you want to ride, nothing wrong with an older bike just make sure it starts easily and runs properly so good carb and ignition absolutely essential.