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About bisby

  • Rank
    Advanced Member
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  • Bike
    ossa gripper
  • Club
    S&H, Peak classic.

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  1. I've had a mikuni on my Ossa gripper for years because i was after better pickup from low revs and the old Amal was badly worn. It has served me well but i was finding it would gas up on steep down hills and also flood the engine if i dropped the bike, so i have invested in a new OKO from scooter assasins which cost me just under £60.00 plus a couple of different jets and new air filter. It hasnt improoved the perfomance much but it has stopped the flooding... Bargin
  2. I once nipped up my majesty yamaha up in the scottish six days, riding along road section when it started to lose power then the next second the back wheel had locked up so i pulled the clutch in and stopped.after about 5 mins it fired up again and was ok. you could pull the exhaust off and shine a torch in to look at the bore and piston condition.
  3. The photo you posted on Sat 10.04pm i think is Ian Rawlins.
  4. This looks like Glen Scholey on a JCM.
  5. I agree with Dabber, number 23 is John Lampin, and number 26 is Simon Tyas. Not sure on the rest. Steve .
  6. Two other possibles to look out for are twisted swinging arm? and buckled wheel? Steve.
  7. My 1981 Ossa gripper has red stickers, yes they relate to the hardness but the harder ones are also heavier.
  8. I bought one about three weeks back from Splatshop at Chesterfield.
  9. I tighten the the clutch springs down just enough to be able to get a split pin through, then lay the bike in its side and pull the clutch lever in and put a strap around it then put the bike in 5th gear and turn the rear wheel around and you can see the clutch spin and fine tune it to get the plates to spin level. Hopefully it is less likley to slip.
  10. I rode in the first Sammy Miller trial that allowed spanish twinshocks to compete on my 250cc Ossa gripper (tank holds 4.5ltrs) The route was 40miles long and so i asked if there was someone official to carry fuel around? and they said no but there is a petrol station on the route. I carried 1/2 a ltr and put it in the bike as soon as poss, i rode as economical as possible and finished the day ok. When i got home i measured the fuel left in the tank and worked out 45 miles to the tank. i have a 29mm mikuni on the bike. hope this is of help. you could get a few small bottles to put measured amounts of oil in eg enough for two litres of fuel (safer than carrying extra fuel in a rucksack) Ps to be allowed to ride the Miller series with the big british bikes was an honour. Steve.
  11. Front wheel drive, rear wheel steering?
  12. Very sad to hear this news about Derek Allen today, He helped me with refueling at the Scottish six days trial for a number of years until the army tuck over from the private clubs. I have just a few photos of me in the Scottish and most were taken by Derek. One good memory was catching him out in the ssdt one year, i was the first rider of our club (Sheffield & Hallamshire Mc and Hillsborough Mcc,) on the road and i turned up earlier than he expected so he started to pore fuel into my bike complete with cigar in his mouth! Stephen Bisby.
  13. I have just put a new clutch into mine, i drained the oil out through the drain in the sump (front wheel on a brick) and left it for 1/2 hour then tilted it side to side a bit, i didnt bother to measure what came out. Then laid the bike on its side to work on the clutch and noted that there was still some oil left in the hollows of the main engine case. if i had to guess how much id say more than 50ml but less than 100ml. when i look in the gear box area there is an area in front of the gears where a bolt goes through both halves in the castings, this will act as a dam for some oil.
  14. I can only think of three ways you could lose? the oil. One as stated, crank case seal or gasket leaking into bottom end. Two when you filled it up if you have the bike on its side it could have come out the gearbox breather above the final drive sprocket, but you would have seen the oil. Three, i bet its still in there around the clutch and cush drive , if you lift the front wheel up and lean it to the right it can flow into the gearbox. Steve.
  15. I serviced a pair of my falcons last week for my Ossa gripper and was very happy with the way they worked at the Kia twinshock champ round. I used 90cc of 5wt oil and 55psi (i have one extra hole drilled in the rebound damper side) and the springs are 50lbs weight on the third groove from the valve end.