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jon v8

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About jon v8

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    Advanced Member

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  • Bike
    AJS,James J9,BSA,TY

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  • Location
    Bath UK
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  1. jon v8

    Ashwicke Classic charity trial.

    Many thanks to those who came along and rode or helped out, we raised £457 for the Friends of Huck. Our next charity trial is on the 22nd of September at Ayford farm near Marshfield.
  2. As per the title, we are running our next charity trial this Sunday July 14th at Star farm near Marshfield on the A420 Bristol to Chippenham road. All proceeds from the trial will go to the Friends of Huck Charity. We will be running a 4 lap, 10 section format, for all Pre65 and twinshock classes. Three routes to suit all abilities,but nothing too tight or scary. No mono's. There will be a burger van in the car park ,plenty of level,hard standing.Postcode for the event is SN14 8LH. Please come and join us. 11am start. https://joncvsv8.wixsite.com/ashwicke
  3. jon v8

    1978 Yamaha TY250 No Power

    Either a blocked exhaust or its worn out.Don't expect it to be like a modern Gas Gas, but if they are in good shape they are fine,plenty of power for twinshock trials.
  4. jon v8

    BSA B40 clutch adjustment

    Be a good idea to get hold of a copy of the Rupert Ratio engine manual,everything you need to know is in there. http://www.ratiopublishing.co.uk/
  5. jon v8

    What does one think....

    The Arbuthnot is often 80 miles +, but only 15 sections, I'd like less miles,more sections. (Not too comfy on a rigid AJS...) But its a lovely part of the world,there are always great bikes too see and like minded nutters to chat / take the p%%s etc.
  6. jon v8

    How to repair piston?

    I Tig welded a hole in the crown of a piston that was made by a valve trying to escape. Apparently the engine ran fine afterwards,but it was a Rover K series. I think if it is measured after the weld and its not distorted it should be fine. Rod choice for the filler metal should be a big consideration.
  7. jon v8

    BSA B40 GB trials gearing info

    I think the confusion is that the top gear ratio as said locks the clutch to the front sprocket - 1-1. In the charts the top gear ratio has to be used to calculate 1st,2nd,and 3rd overall ratios as they all drive through the layshaft back up to the sleeve gear. So what we need is the smallest teeth count on the layshaft going to the largest tooth count on the sleeve gear.That way the gap separating the intermediate gears from top gear is biggest. The early distributor type engines have a better choice,as the trials sleeve has more teeth than the WD B40 type. I always ask Rupert Ratio for the info,he is a walking BSA info system !
  8. jon v8

    Bolt on footrests

    I can't be bothered with "Thread" politics, but one thing I would say is that those bolt on footrest kits are not very strong.I had something very similar or maybe identical from SM products on my TY250, they bend very easily. I ended up welding a thick gusset down the front face of them.
  9. jon v8

    BSA B40 GB trials gearing info

    Ok, home again and just getting my C15 ready to ride tomorrow. Its running a 520 chain with 13 teeth on the gearbox and 48 on the rear wheel. WD B40 cluster and standard C15 engine sprocket and clutch basket. That combo works fine for closed events, but would be cruel for any distance on the road.
  10. jon v8

    BSA B40 GB trials gearing info

    I think you also need to take into account of what internal gearbox ratio's you are using.My C15 needed a different rear sprocket after fitting the B40 GB cluster in it.I'm away on holiday till next week,so can't tell you what I'm using.The only thing I would say is that although its a wide ratio GB cluster,first is fine,just where I need it,so is second. Bit of a gap to third,but top is bloody useless on the road.Much over 24mph is horrible, so I wouldn't want to use it for a road trial. For that I'm going to build another engine based on an early distributor type engine with the original trials ratios, giving the biggest jump from third to top you can get - Info from the main man Rupert Ratio.
  11. jon v8

    Greeves riders ass.

    Don't worry about it,just wait till you are at a trial where one of their members are and give them a bit of paper with all the details on it. They are a good bunch.
  12. jon v8

    Bucket list trials events

    Anything in Devon.
  13. jon v8

    Alternative to observed trials?

    That's certainly not the case with West country Pre65 / Twinshock trials, you couldn't wish for a better bunch to have a laugh with. We rode the Bath Classic trial yesterday and my score was awful,simply because we were spending so much time ribbing each other we didn't concentrate on riding the sections properly. Brilliant day out !
  14. jon v8

    Alternative to observed trials?

    I would also say LDT's, I did the Moor to Sea recently on my little rigid James,according to my GPS speedo I did 88 miles and was riding for nearly 10 hours.Brilliant day out and lovely scenery.But you do need a reliable bike like my little James...
  15. jon v8

    B40 bsa otter prices

    If you can just fill it with fuel,oil the chain and ride it this weekend,its a good price. If you make up a list of parts you need to build a bike how you want it,the price can be a bit of a shock.And you still have to build it - And shake it down.Very time consuming,rewarding if that's what you want to do. I'm part way through building a B44 engined B40WD as a trail bike.Two years in and about £4k and its still far from finished.Should be a cracking bike,but I rather wish I had just bought a running B44 Victor...