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About feetupfun

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  • Bike
    1963 to 1981

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    Gladstone Australia
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  1. feetupfun

    1980 (525) TY 175 Project

    I would say that the reason it bogs down without the "choke" is because you haven't fully cleaned out the pilot jet circuit
  2. feetupfun

    Montesa Cota 348 MRR date of manufacture.

    The design changed through the production run as perce says. Brake pedal design, shift lever design, air caps on forks and casing protection loops on the frame. My ride 348 is 51M 10476 motor and frame and has the original style (folding) brake pedal tip, (folding) shift lever tip and no case protectors. Mine does not have the signature on the fibreglass under the seat. It also doesn't have the slotted line along the tank. My memory of the sequence was 76 has the MRR signature, 77 has a fairly plain tank and 78 has a gold/black slotted line along the sides of the tank. I'm thinking that this probably means my ride 348 is 1977 but I'm happy to hear of other opinions.
  3. feetupfun

    Cota 247 VUK fuel tank problems

    Degreasing using kero inside and out then hot water with dishwashing detergent then dry it out then quick rinse with acetone and dry it out quickly
  4. feetupfun

    Cota 247 VUK fuel tank problems

    Most of the 1970s spanish bike fibreglass tanks that have come into my possession have had extremely poor condition internals with bare glass visible in many areas. You could see areas of thin resin in the dark using a strong torch shone inside the filler hole and can see the exposed glass using a torch and a small mirror. There is no way that I was going to paint a tank in that condition. I have found that after a thorough degrease process then an internal coating of brushing epoxy resin binds perfectly to the old polyester resin and the exposed glass and the epoxy is also highly resistant to the weird stuff they put in petrol nowadays. It adds a couple of hundred grams to the tank and great peace-of-mind to me. The oldest one of mine is an Alpina tank done in the early 2000s and it has had petrol sitting in it since then. The colour of the epoxy inside has gone from light brown to mid brown in that time but otherwise looks unchanged. I've done 5 or 6 old spanish fibreglass tanks so far like this and they are all still going very well and they all have petrol left in them between rides.
  5. feetupfun

    montesa cota twinshocks

    If you have a Cota 200 and a 247 frame you are in the perfect position to find your own answer about swapping front ends. I would suggest that you can compare the lengths of both steering tubes and look at how the steering stop from the 200 will work on the 247 frame. If the steering tubes are the same length then it is worth taking the triple clamps out of the 200 and comparing the internal diameters of the steering tubes. Both bikes have leading axle fork bottoms so there probably wont be any issues with clearance between the fork tubes and the fuel tank. If it was me I would much prefer to fit a more reliable motor in the 200. Honda motors are pretty tall. A TY175 motor would be about the right length and height.
  6. feetupfun

    Cota 247 VUK fuel tank problems

    If it was me I'd fix the top part and put it back together
  7. feetupfun

    Too smoky!

    I'll second b40rt's comment. I would be checking if the primary drive oil level is going down. It looks suspiciously like smoke from burning transmission oil to me. Two stroke oil-induced smoke usually has more of a blue colour. If the oil level is going down, the prime suspect would be the crank seal on the primary drive side. It should smell wrong too if it is transmission oil.
  8. feetupfun

    montesa cota twinshocks

    Maybe clarify what you are asking
  9. feetupfun

    TY250 Autolube Removal

    A stainless steel automotive welsh plug is another easy way to plug the hole
  10. feetupfun

    TY250 A points setting

    You can connect the buzzer anywhere between the points and the LT connection on the HT coil. On Yamahas I connect the buzzer at the bullet connector that is near the airbox. The buzzer works best if this connector is disconnected at the time.
  11. feetupfun

    Fork seals too tight in sliders

    After reading and replying to Tillerman6 today, I fitted a new set of All Balls fork seals and they are a different design to what I have seen before. They have a ridge near the bottom of the OD and fitting them required a slightly different technique than previously. They were much harder to keep straight than previous times until they were in the bore. They were no tighter than normal and took little force to move them axially once their whole width was inside the bore. I'm not sure if Tillerman's seals were like this with the ridge near the bottom because mine were a different size (36 x 48) for a Suzuki SP370
  12. feetupfun

    Fork seals too tight in sliders

    No idea why your seal is tight because you haven't said much about what you've done in preparation but here are generic suggestions: Check to see if the bore in the slider is completely round. Clean out the bore with a scotchbrite pad until it is shiny metal all the way to the bottom. Warm up the slider to about 80 degrees C. Put some anti-sieze in the bore. It's normal practice to fit seals in that type of fork with the sliders removed from the tubes. I usually use a 1/2 drive socket that has an OD slightly smaller than the bore and tap it with a small hammer. Plastic coated seals don't usually take much force to get in place
  13. feetupfun

    Help identifying a engine

    I think it's an Astro (model 90) and you've either misread the first number or someone has altered the number. How about you cover up your secret last number and take a close-up photo and post it up?
  14. feetupfun

    Help identifying a engine

    I'd like to help but am having trouble understanding the question
  15. feetupfun

    torque specs for TY250A

    The timing will depend on what the advance curve for that igniton looks like and what you are looking for. I fitted an electronic ignition (not the same as yours) because I had just converted my TY175 to 210cc. With the 210cc, the motor response was a bit too fast for me at low RPM. The fixed timing (points ignition) was a compromise between low RPM and high RPM performance. With the electronic ignition with an advance curve, I could get just the right timing at low RPM to get rid of the snappiness and still not compromise the high RPM performance. By the time I was happy, the timing was a bit less advanced at low RPM, maybe 5mm less advanced on the OD of the flywheel compared to standard timing. I would suggest you put yours in the middle of the slot and try it out. If you like experimenting (it sounds like you do) then try different stator plate positions and see which you like the best. A strobe will provide visual feedback for where the timing is, but it will just be moving by the same amount in degrees as you move the stator plate.