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About nh014

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    Advanced Member

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  • Bike
    348 CotaX3 Beta Rev3

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  • Location
    Akron PA USA
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  1. Keep in mind that most Japanese motorcycles use Japanese Industrial Standard (JIS) screws. Sometimes referred to Japanese Phillips. Standard Phillips screwdrivers are built with an angle on the flanks and rounded corners. This taper on the driving faces causes the screwdriver bit to "cam out" of the slot before twisting a screw head off. JIS screwdrivers have near parallel faces on the driving flanges and will not cam out. Using a Phillips screwdriver on JIS screws, especially those rusted tight, will typically result in a stripped out screw. Most hardware stores do not stock JIS screwdrivers, but you can find them on eBay.
  2. I've used J-B Weld, a two part epoxy, with good success on a few 348 cases. There is no problem with the design and when installed correctly the kick start lever will travel safely past the foot peg to the straight down position. Correct installation is to be sure the kick start shaft is rotated fully clockwise and then install the kick start lever at the one o'clock position. When starting, the lever will engage around 11 o'clock and will safely rotate to the 6 o'clock position.
  3. Montesa 348 Cota. I've been riding the same 348 for 42 years, in well over 700 meets. Can count on one hand the number of times the bike failed to finish a meet.
  4. nh014

    Montesa 200 timing

    Timing is 2.00 mm (0.079") BTDC with the points set at 0.35 to 0.45 mm (0.14 to 0.18"). There is no Montesa workshop manual. The closest you will find is the Clymer Service and Repair Manual for 1965 to 1975 Montesa 123 - 360cc Singles. They pop up occasionally on E-Bay and will suffice for the 1976 through the early 80 models.
  5. Do a search on any of the motorcycle forums and you will find that Caswell's fuel tank sealer is the most frequently recommended sealer. I have used it on numerous fiberglass tanks with great success. Just follow the instructions on tank cleaning and application. See https://www.caswellplating.com for details.
  6. Restored and worked on numerous 348's and never ran into plug to exhaust pipe interference. They are close, but always had enough room to drop a socket over the plug to remove it.
  7. nh014

    Beta Evo 4t 300 jets

  8. That is generally how I have identified them, although my first 348, purchased new, and sold to me as a 77, has the MR signature. It is serial number 5457. I've always thought of it as a very late 76 or very early 77 model.
  9. As you can see from the number of replies, it is easy to be overwhelmed by data relative to the year of manufacture. Quite simply, it doesn’t exist, or at least like you, I’ve never found it. You’d probably be close by dividing the total 348 production of 15700 by 3, for the years 76, 77, and 78. So serial number 0001 through 5233 are 76’s, 5234 through 10466 are 77’s, and anything above 10466 are 78’s.
  10. nh014

    Montesa 200 Rings

    Standard gap for for the Cota's is 0.20 to 0.35 mm (0.0078 to 0.0137 in).
  11. Any Beta experts want to venture a guess as to what happened here. Bike (2014 Beta Evo 300) locked up in third gear. Haven't split the cases yet, so don't know what we will find.
  12. What you refer to as the brass button was originally available in six different lengths to compensate for clutch wear. Since they are difficult to find, the easiest fix is to make up a new inner cable, cut to a shorter length than the original inner cable.
  13. nh014

    Montesa Cota 348

    Serial number 12908 is a 1978 model. Malcolm Rathmell signature tanks were on early production Cota's (1976 and early 1977), then there was a short period of plain tanks, and then they went to the black and gold decal on the base of the tank at serial number 11307 for the 1978 model's. Remember that Montesa, as well as Bultaco and Ossa made "running" changes which made identifying models by year a little fuzzy at times.
  14. I've gone the same route as Feetupfun, from the original Amal, to a VM26 Mikuni, to a 26 MM OKO. Could never get the Mikuni set up to where i liked it. The OKO works great with a 50 pilot jet, needle in top notch, and 115 main. Actually there is nothing wrong with the Amal if it wasn't for the fact that they tend to wear, especially around the slide.
  15. nh014

    Montesa Cota 348

    Turn the counter shaft sprocket nut clockwise to loosen it. This also applies to the magneto / flywheel nut. They are most easily removed with an impact hammer.
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