dadof2

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  1. I am surprised you and your sons found the Ty difficult, the none down 4 up is one of the easiest gearboxes to learn on as is the torquey hard to stall motor. I would advise a Gasgas 80 as the next step. Friends sons have had both Beta and GG 80s and the GG was the better all round bike. Whatever you get it is as well to brush up on your mechanical skills, all trials bikes need some work and trailing to a dealer frequently will be frustrating and probably expensive. Better still get your son to learn to do his own fixing.
  2. The reason I mentioned 220 BHP is because you inferred that what I was saying was incorrect because trials bikes have more power than in the 1970s, You will get more traction and stability in a higher gear no matter what the power output. Perhaps one of the reasons for Millers outstanding success, not just at trials but also at road racing and MX was because he understood how to find traction and one of his methods of doing this was to pull a higher gear. As I said previously its the laws of physics / mechanics and those same laws apply to MX F1 etc and that is why they shortshift, thereby lowering the engine revs for a given speed, exactly the same as running a higher gear in trials, to lessen the chance of loosing traction. If you look back at the original post he states that he is struggling in first gear yet notes that Dan Thorpe who is going better is using second. That observation sums up what I have been saying. The lower the gear they greater the torque being applied at the tire contact patch, the higher the torque (force on the joint) the more likely that joint is to give way.
  3. No ND I am correct it is you who are wrong - learn some basic physics / mechanics. Perhaps you think all the MX1, Moto GP and F1 drivers are wrong too when the short shift to avoid loss of traction in slippery conditions. You will also find some cars / vehicles with auto transmission have a sand / snow setting. This changes the gearbox so they set off in second gear to get more grip. I have first hand experience of one of these veicles (220 BHP) which is a fair bit more than any trials bike
  4. https://www.google.co.uk/maps/place/St+Blazey+Mx/@50.3652646,-6.9446186,7z/data=!4m5!3m4!1s0x0:0x7afd1300e3716ed3!8m2!3d50.3652646!4d-4.7121625
  5. The growing classic bike and classic car restoration numbers. The production of retro styled bike by all the major manufacturers. Apart from possibly the prestige of WTC wins further trials bike evolution is pointless. Manufacturers should concentrate on rectifying weaknesses (The original aim of trials) Whether a manual is paper er e copy is not the issue, its quality and quantity of information in them that is important. All current trials manuals are lacking to greater or lesser extents.
  6. I was not suggesting the SSDT sections were the same as 40 years ago. However they for the most part are still slippery cobbles / boulders where maintaining forwards momentum is a key factor, unlike most WTC dry grippy sections which favour a hesitate / stop and launch it approach. The higher the gear used the less likely is wheel spin irrespective of the speed, this as stated by Miller is still true today.
  7. Perhaps we are coming to the time when further evolution is not that desirable. The more bikes evolve, the greater the number who will choose retro or classic classes. It could be quite a help if several manufacturers evolved their manuals to the standard or better of 1980s Honda MX manuals. People might then be able to fix their bikes instead of posting so many simple queries and problems on TC.
  8. If you are concerned your exhaust fumes may be bothering those behind you in the queue, try the following. Put your bike in 5th or 6th gear, Tilt it onto the sidestand to take the weight off the rear wheel. Give it a good handful of throttle and spin the rear wheel up to clear out the tread. Those behind will soon forget about a few fumes Works even better in a river
  9. There are overwhelming reasons why riding in a higher gear is better on traditional no stop SSDT style sections. It is the equivalent of short shifting in racing cars or MX on slippery tracks to gain to improve traction and stability. Sammy Millers book "Clean to the finish" (now selling for £100 to £1,000 per copy) gives a good explanation. I can remember recommending this book to the lady poster who used to ride a Beta, now a 4RT about a year or two ago when there was a copy available for £35. Would have been a good investment. If any one knows Sammy closely perhaps they could talk him into doing a reprint of all his books.
  10. Agree with the original poster. I am pretty sure Miller, Lampkin, Rathmell etc did all or most of their own routine maintenance and repairs when they were works / development riders. Not the case today, with support teams, minders, lots of mechanics etc. If top riders still had to fettle their own bikes, often a long way from support vans its a fair bet they would put more priority on making them reliable and easy to fix. I was thinking of posing the following in the trials bike evolution thread but will put it here. Its not just bikes that are affected by this "form over function" trend. Car headlight units or bulbs used to be cheap and easy to replace. List price for a headlight unit for my previous car was about £85 but i could get an identical pattern unit for under £30. My new car is same make / model name but has those fancy wrap round headlights. Light output is no better (actually slightly worse) and they are a fortune to replace (over £250 so I am told by a colleague who had to replace one). The new ones are made of plastic so go dull whereas the previous ones were glass which in normal use lasted the life of the car.
  11. 5 JAN 2017 — Dear Supporter, Thank you so much for signing our petition, the response over the Christmas period has been incredible and we are really starting to make progress. Writing in 'The Telegraph' over the weekend, Boris Johnson MP has argued that the Vnuk ruling on compulsory motor insurance for any mechanically propelled vehicle is "insane". In a striking attack against the European Court of Justice, the Foreign Secretary defends the right of "every free-born Brit to pootle blissfully on his own quad bike on his own private land" in his unique characteristic style. Despite the strong opposition to the 'Vnuk' ruling, while the United Kingdom remains a member of the European Union, HM Government is bound to implement the Directive which will affect motorsport across the country. We are asking that HM Government under no circumstances implements the 'Vnuk' judgement in a way that encompasses vehicles involved in motor and motorcycle sport activities.You can help us by sharing the petition amongst your friends, family and fellow motorsport enthusiasts!Yours in sport, Tristan Robinson Dan SummersFight 'Vnuk' www.fightvnuk.co.uk
  12. Firstly - Can this topic be moved to and continued on the original post. Secondly 5 JAN 2017 — Dear Supporter, Thank you so much for signing our petition, the response over the Christmas period has been incredible and we are really starting to make progress. Writing in 'The Telegraph' over the weekend, Boris Johnson MP has argued that the Vnuk ruling on compulsory motor insurance for any mechanically propelled vehicle is "insane". In a striking attack against the European Court of Justice, the Foreign Secretary defends the right of "every free-born Brit to pootle blissfully on his own quad bike on his own private land" in his unique characteristic style. Despite the strong opposition to the 'Vnuk' ruling, while the United Kingdom remains a member of the European Union, HM Government is bound to implement the Directive which will affect motorsport across the country. We are asking that HM Government under no circumstances implements the 'Vnuk' judgement in a way that encompasses vehicles involved in motor and motorcycle sport activities.You can help us by sharing the petition amongst your friends, family and fellow motorsport enthusiasts!Yours in sport, Tristan Robinson Dan SummersFight 'Vnuk' www.fightvnuk.co.uk
  13. Fantic used to match piston to bore using low pressure blowby air flow measurement so you probably can never repeat original engine quietness although is someone like Lancourt replates your bore and matches it to your piston with clearance on the tight side you should get very near. The best way to get a quiet (and long lasting piston) piston to bore fit is to get the bore honed about 0.0005 inch too tight, then run the engine fairly very gently for 1/2 hour, let it cool then run it a bit harder (no more than 1/2 throttle) for another 1/2 hour then strip it and wet and dry the high spots from the piston. Then run in as normal http://www.opieoils.co.uk/p-69390-silkolene-classic-2t-premix-sae-40-synthetic-ester-2-stroke-and-rotary-engine-oil.aspx is far better for air cooled engines than modern 2t oils which tend to be thinner (SAE 20 to 30) for watercooled engines.
  14. TKM or Parilla? Using 2 or 3 engines for one days practice and racing was not uncommon.
  15. I and quite a few other ran 11/39. Puts first gear where second is on standard gearing. Quite a few riders found they never needed original first gear and the 11/39 made 3rd gear ace for hill climb sections and 4th ideal for moorland crossing, and a decent 5th for road work.