Jump to content


  • Content count

  • Joined

  • Last visited


About lowbrow

  • Rank
    Advanced Member

Previous Fields

  • Bike
    300 Jotagas

Profile Information

  • Location
  • Gender

Recent Profile Visitors

5,983 profile views
  1. 2019 Beta. Let the speculation begin!

    That's interesting and something I didn't know. I think it will only take another trials manufacturer (or two) to use FI and the others will follow suit much as they did with the introduction of monoshock suspension and water cooling.
  2. 2019 Beta. Let the speculation begin!

    If Beta does use fuel injection on its 2T bikes it will be interesting to see if it benefits from collaboration with KTM to use injectors that fuel direct into the transfer ports as opposed to what KTM dismisses as the 'electronic carburettor' fuel injection systems used by Ossa and Vertigo.
  3. Head spacer

    I remembered that I have a head spacer from a 300 GasGas so tried to do what I suggested and it's not that easy with the motor all built up in the frame. The PCD and spacing of the stud holes does appear to be the same as the Jotagas. The head spacer idea predates the later two part head design and I agree with you that it's better to machine the insert especially if you can find data on the correct shape and volume.
  4. Head spacer

    A GasGas head insert won't fit the Jotagas. If you can obtain a disc type head spacer it should be easy enough to lay it on top of the head to see if the bolt holes line up, but if you use a spacer and low compression head insert won't it be flat as the proverbial ................ I presume you're using 98 octane fuel. Have you tried richening the mixture/changing the jets, etc? What make of carb' are you using?
  5. TXT 250 Edition 2002

    These are good, solid, reliable bikes. If you loop the bike make sure the rear mudguard is still sealed against the airbox otherwise crud can get where it shouldn't. GasGasUK used to offer a rubber apron to help overcome this problem. Enjoy!
  6. Bash plate identity ?

    Ossa MAR? Looks like it'd make a good snow shovel, if you could fix a handle to it.
  7. New to trials and my bike starts and dies. Pleas help

    Hi, welcome to trials and the joys of bike maintenance! From what you describe I’d suspect an air leak on the inlet side of the motor and if it was mine I’d do the following to eliminate all probable causes: Check flow of fuel from the petcock is good and the tank breather hose is not blocked. If no better then proceed to: remove the air box, clean and oil the filter if dirty; remove, dismantle and thoroughly clean the carburettor making sure none of the jets or airways is blocked and the float level is correct; remove inlet and reed cage, and any spacer between the reed cage and crankcases. Check reeds are intact and that there are no splits in the inlet rubber. Check carburettor is a snug fit in the inlet rubber. Some 327s had the larger 28mm Dellorto so has someone swapped to a 26mm without changing the inlet? (We used to use the 28mm inlet when installing a Keihin, back in the day.) If everything is okay reinstall the reed cage/inlet using new gaskets and a light smear of silicone gasket goo on every surface. Fit carb and air box and you should be good. What better way to spend a Saturday? Good luck!
  8. Polishing ali castings?

    Thanks for the additional info'. For the die hard trials bike 'fettler' the only problem would appear to be that you can't adjust it with the motor running, unless you're very brave!
  9. Polishing ali castings?

    Thanks, I'd never seen or even heard of an APT Smartcarb before. I'm not intending to hijack your thread, but having done some research online I'm curious; is it good in a trials application?
  10. Polishing ali castings?

    That's a great job; the carb has been transformed! What is it?
  11. Trial GP

    Looks like it's going to be shown on MotorsportTV (Sky channel 447) at 22.35 this evening
  12. Cheltenham Home Guard Mcc

    It's on. Reg's here http://www.acuwesterncentre.org.uk/downloads/suppregs_chg_newyeartrial_2jan17.pdf
  13. Breakheart Quarry

    It's listed on the AMCA website.
  14. Trials In The Midlands

    Staffordshire Moorlands club trial?
  15. New Rear Shock

    Options are limited because the Jotagas shock won't fit other bikes and vice versa. The factory fit Olle or Elka shocks, both of which are rebuildable. Ohlins is another option. Haven is the best place to start for advice these days.