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robf

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Posts posted by robf
 
 
  1. Hi guys

    I am sure I read somewhere about using a Montesa 315r on a modified TY250 twin shock airbox

    I have seen the one on the very cool highly modified TY in one of the mags and on here but that uses a custom airbox and I want to use a standard ( but of course modified ) airbox

    Has anyone done this mod - if so can you please tell me how you did it or even better if you have a picture

  2. Well here is mine.

    It's a 1974 Ty250a that is a slow progress riding restoration job.

    The aim is to end up with a mildly tricked up bike but that still looks like an A model - I am almost certain to change my mind a few hundred times as the project goes on. I hope that by the time it's finished I am at least slightly competent on it as even though I have bene riding for 31 years I am amazingly rubbish at this trials lark :-)

    Anyway state of play as of today ....

    20121001-144910.jpg

    • Like 1
  3. Hi guys

    From what I can see many twin shock bikes came with tiller style yokes as standard and most modern bikes do not.

    It also seems quite popular to either mod or change the top yoke to get rid of the tiller system.

    So what was the original thinking behind them and what has changed now that makes them a bad idea ?

  4. Thanks for all the replies.

    Quite a bit of support for the Dominos but leverage is something that I need to consider as the clutch routing on the twinshock TY250 isnt exactly ideal

    I am quite tempted by some on John Cane's TY site - I think they are made by Apico ( forged ) and have 3 positions on the lever for the nipple so you can adjust the ratio - has anyone tried these ?

  5. Hi Guys

    Although I specifically want some new levers for my 1974 TY250 I thought it made more sense to ask in here as it is a more generic question

    What levers would you recommend ?

    I currently have some VERY nasty generic ones on the bike and need to change them asap

    Also do all the trials levers on the market accept the same size cable barrels ?

    Thanks in advance for any help

  6. Update ...

    After fitting the carb and throwing in some fresh petrol the bike still wouldn't start

    I had put a new plug in but the spark was VERY weak and I decided to go straight to an electronic ignition kit rather than muck about with the points ( lazy I know )

    After fitting the kit ( from TY Trials ) I gave the bike a half hearted kick on the kickstart to get some fuel in the cylinder and it started first kick :-)

    It sounds very bunged up ( exhaust I assume ) but after setting the tickover it actually will sit on tickover

    At least now I have a running bike ( a very ugly running bike )

  7. Hi Guys

    I am at the early stages of getting a 1974 Yamaha TY250 into a usable condition

    I have put a new carb on it and an electronic ignition and now it actually runs

    I thought it might also be nice to be able to stop it so will be fitting a kill switch - the question is where do you feel is the best location for it ?

    It's a normal press button type but I have seen them fitted on the left hand bar - on the right hand bar and even in the middle between the two bar clamps

    I would be interested to hear your feedback in regards to the pros and cons of these locations

  8. Hi guys

    Can I swap the standard TK carb for a 26mm Mikuni as a straight swap ?

    Is the inlet rubber and the air filter hose the same ?

    I am assuming that I can just get a Mikuni and pop it on but I decided it might be sensible to ask first

    ... Rob

  9. Hi Guys

    My bike ( a 1975 159 325 ) has been sitting for a long time and the carb was full of gunk and the orings has rotted away.

    I cleaned the carb up and ordered some orings from Bultaco UK but it's not all all clear where the 3 orings actually go and the exploded diagrams dont help either

    Can you tell me where they go please

    It looks like oring 3 goes in groove C

    oring 1 fits the diameter of slot A but doesnt seem deep enough - thick enough - ie in can move up and down the groove

    I have no idea where the other oring goes ?

    Hope one of you can advise

    carb.jpg

  10. Hi guys

    Thanks for the help and encouragement

    The carb is stripped and is i am cleaning it up slowly and carefully and my first bag of bits from Bultaco UK arrived today

    Just spent some time getting the crud out of the airbox

    Hopefully I can get it back together at the end of the week and get it started and work out what job is next

    The rkear tyre has a gash so it looks like i wont be able to wait to sort that out

    Towbar is being fitted to my car on friday so I can get a rack fitted

 
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