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About gasgasshetland

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  • Bike
    Scorpa/198A Sherpa

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  • Location
    Shetland adrift somewhere off the top of Scotland!
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  1. Thanks for that, that’s a great help, will get onto getting parts ordered. ??
  2. During the lock down I’ve been constructing a section in the back garden. Still a bit to go but getting the base laid in then will start making alterations to make it more challenging. closest area is also going to double a steps down into garden steeper than the photo makes it look.
  3. Could anyone advise what carb setup I should start with for my Sherpa 250 198A using a Dellorto PHBH26. BS jet sizes ,needle etc. cheers in advance.
  4. Anyone any experience with modern fork internals for classic bikes. Thinking to get the HFS fork internals as I’ve put the OZO/Betor shocks on the rear and want to improve the front end. Are they worth while/money or put new springs in originals. At present they bottom out easily. Running 15w fork oil as recommended to me.
  5. Ok guys thanks for your reply’s. I will keep trying to see if I can find the fault. Might try another TB, but not keen to pay £300
  6. Hi there just wondered if anyone has experienced a problem like I’m having. my 15 repsol starts fine and runs away fine, but after a bit it starts dropping the engine speed on shutting off the throttle and it goes below idle speed and stalls. It will immediately start again and idle away fine, but drive the bike again and it will drop the idle speed and stall. So it’s happy idling from start up, but drops off from shuttling the throttle off. Seems to be once it’s warm. While running it takes full throttle and seems fine, but once shutting off it will stall. I have cleaned the throttle body main venturi butterfly passage and the air passage that is in use when idling. There had been an alteration done to the bike prior to me buying it and the head breather oil catch tank had been moved to under the seat and wasn’t doing it’s job and oil was getting into the airbox then going through the throttle body. I have put a small breather filter up under the headstock. Its my first montesa 4rt so not really that well read on the injection setup.
  7. Hi Guys. Was out again today. Had changed plug,checked coolant. Slackened off the throttle cable and brought the idle speed up, but it continued to do the same and drop the idle speed on shutting off throttle. I’ve taken the tank off to check it. Looks spotless inside. Is the teabag type filter in the small sump below the pump? Lifting the gasket I ca see a green mesh. Is it within the mesh. I will attach a photo. Any advice welcome I was thinking to get the throttle body off and see if it needed cleaning. It’s all new to me as I’ve been a Gasgas/ carb user until this bike being my first fuel injected so it’s all a bit of a mystery to me??
  8. gasgasshetland

    Ssdt gearing

    Just use 3rd gear flat oot in all sections ally ????
  9. Hi there can anyone recommend a company in the uk that do rebores. My 198A 250sherpa is in need of a rebores and wondered if anyone could advise on who to use and estimated cost of he rebore.
  10. Hi Jimmyl. It was dropping it’s idle speed in both neutral and in gear. At least I think it was. Just as a note it’s a 2015 model
  11. Thanks for the quick reply’s. I will get it all checked out. And hopefully it’s just something simple.
  12. Hi there, can anyone shed some light on what could be causing my 4rt to start dropping it’s idle speed when it’s hot. It’s fine for the first hour or so then after it’s been revving when shutting off throttle the engine speed drops below idle speed and stalls. The bike otherwise is fine. I changed the air filter prior to going out on Sunday, thinking it may have been a dirty air filter. but it did the same after it had been running for a while. Could it be the plug starting to fail. I’ve never done anything with the fuel system. Ie throttle body or fuel tank, but wondered if it could be one of those causing problems. Any advice welcomed.
  13. Thanks Bondy, yeh it’s going to be stripped down. The detent plunger is quite worn looking so will replace it while am at it. It’s turning over freely now but I’d say the bearings sound a little rough. It’s getting a pretty much full rework of the bike as I bought it unseen but complete and it’s needing a reasonable bit of work doing to it all. I had a 199A a few years ago that I restored, but it was almost too nice to ride, it was sold to a collector p, but this one is going to be ridden for sure hopefully have it done for the new 2 day in September in Kinlochleven if I can get an entry cheers
  14. Well after soaking the crank in I noted deblock oil over night it was feeling that there was more movement at the crank. Worked it gently back and fore and it has come free so it’s been a frozen crank ?. So full strip and rebuild required for sure.
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