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About scifi

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    N Wales
  1. Front brake wont lock on 2018 Sherco factory 300

    You need tyres with less grip, have you tried Mitas..?
  2. OSSA MAR 4 speed?

    Looks like it will do the job, as long as you don't want to win any International Competitions. My MAR has a similar paint scheme, but does have 5 gears. I find the crankcase is quite wide, so for some rocky trials I ride my Yam TY175.
  3. 74 ty 250 wont rev out

    Sound like it is running too rich at full throttle. You haven't done something daft like clean the main jet out with a twist drill have you? Or perhaps you have put the needle back in the wrong notch. Either way you should have a sooty plug, to confirm it is running rich. Maybe the cure is to reduce the main jet size until it gives the correct performance. edit.... Just had another thought... Is the Cold-Start mechanism working correctly, with no rotting of the rubber seals.?
  4. Trial bike for single trail riding

    Hi Lefebvre, your idea about the seat/fuel tank is good if you intend to ride for many miles at a time. Most Trials riders change their rear tyre before it wears more than 2mm, but for Trail riding you can ride them down to 1/4 tread depth and still have lots of grip on forest roads. Also the tyre pressures should go up from 6+4 F+R, to 12 all round for road work. You may find that the trials gearing is quite low for fast road work, so you could try a larger gearbox sprocket, up from 12t to 15t would get you moving a bit quicker. Have fun...
  5. 1976 TY175 frame bracket reference needed.

    Well you ain't going to make one of those, unless you have a 200 ton stamp press and the correct dies. So you will need to fabricate it out of 6-8mm sheet steel, and machine the angled curve to match the frame. Then how to provide the screwed portion is up to you. The standard exhaust does attach via a twin rubber bushed Dog-Bone, but I have seen many different types used, some with and some without the rubber inserts. The Dog-Bone piece is 28mm centre to centre (others are up to 40mm.) and hangs down at whatever angle is required to fit. .
  6. Suspension

    10 psi..? Are you riding an Enduro or MX Bike..? The standard setting for all trials bikes is about 6 psi front and 4 psi rear. (as 99% of all UK trials riders will tell you.) As for damping, when I rode Moto-Cross, I used to have very minimal damping both front and rear. The idea was that the suspension had to recover quickly between bumps, especially when taken at racing speed. However for trials, where there is usually 3 seconds between each bump, the damping can be a lot slower, try sae15 instead of sae 5 oil. It's not all about rider comfort but about keeping in control. .
  7. A Few Photos From Ssdt 2016

    Same here….. 404.That’s an error. The requested URL was not found on this server. That’s all we know. .
  8. Practice area!

    Have you tried riding down the steps..? On the 1 it will be Ok, but on the 2, 3, and 4 you will need to aviate the front wheel, and land first on the rear wheel. The reason for this will become clear to you if you manually push the bike over the 3 logs... As the front wheel hits the ground, it will try to go on to full lock, and unless you are a Yorkshire-man you will not have the strength to stop it...!
  9. Misc Model191 Questions

    Hi, remember there are two separate end floats in the little end, and each needs to be independent of the other... 1. The needle roller cage needs to be free within the little end, as the cage needs to move ( it rocks at half the speed of the rollers.) In the above photo, it's 19.5mm within the 20mm eye, = 0.5mm slack. 2. Then the little end eye and spacers need some slack on the piston gudgeon pin, maybe 1 or 2 mm, but this might be specified somewhere. .
  10. Clutch slipping on Beta rev3 2002 200

    You say you have tested it on a stand, does this mean you have not tried riding it...? Maybe your bite point is out of adjustment... Have you re-assembled the push rods and mushroom correctly...? Aren't two of the plates thicker, and need to be put on the outer and inner of the clutch pack... You did put the springs back in..??? .
  11. Spark plug oily !

    You could check the heat range of the plug, to see if it is the correct one. Or maybe even try one grade hotter plug. Trials bikes take a bit of a battering as they very rarely run under power for more than a minute or so before you are queueing for the next section, and never get to run flat out for an hour or so, like road bikes. As long as the plug does not foul up and stop working, you should have nothing to worry about. .
  12. New member, bought an old Sherco

    Some bikes ( in 1970's grass-track ) were required to have no tick-over at all, so needed the throttle stop screw to be well unscrewed. (I am not too sure of the current ACU regulations.) So you could try that to see if the engine goes to idle sooner. For Trials you can set whatever tick-over speed you require, some riders even adjust it for particular sections. Get to see what is the correct method of setting your tick-over mixture and speed. It is usual to adjust the mixture screw for a peak in revs, then back off the throttle stop screw to reduce the revs to whatever you require... I usually err 1/8 turn on the rich side of peak, to avoid a lean cut when accelerating. .
  13. New to trials from canada

    Hi Brian, I know nothing about the Canadian Trials scene, but best of luck, and hope you find the organised events near you. The 300 may just suit you, but just because you have one bike, does not stop you from getting a few more... ;)) We are lucky here in North Wales, just this week there were 3 events within 40 miles of home, and lots of the easy sections that I now prefer. .
  14. New member Wirral area

    Ok Chris, I have never known any trials to be held on the Wirral, so you will need to travel into the Llangollen / Oswestry area, or Macclefield which are all in the Cheshire and North Wales ACU Centre. I don't know what happens the other side of the Mersey, but maybe not many trials. Check out these web sites... http://www.cnwtrials.org.uk/wordpress1/ http://gresfordclassic.co.uk/our-club.html Best of luck...
  15. New member Wirral area

    You could try riding the Gresford Classic evening trial on 13 June, they will have some very easy sections at Springfield lane at the rear of Marford Hill, get there before 17:30 to arrange your formalities.. Also there are some practice venues in the Wrexham area.. Kynerston's at Trevor, and My Llangollen Club has an area for club members near Pontcysylltyll, (next to the MAN Truck Garage.) where the lads meet informally on Thursday evenings. .