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About yozuri

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  1. A friend had a near mint 1978 Honda XL 125 that had an electrical issue - no high beam or turn signals. Turned out to be a bad battery. I also took the opportunity to do a complete tune-up and adjustment service. It was considerably out of spec in many areas, but I eventually corrected all. the bike started on the first kick and seemed to run well. The owner reported that although the lighting system works great now, the bike will not go faster than 40mph and has become hard to start. I took the bike back and with him present, went over the entire tune-up procedure - doing it per the Honda shop manual. It still ran poorly. but here's the kicker - the owner said he had it tuned by a Honda dealer a few years back and the same thing happened - after tune up , the bike would not go over 40! After another trip to the dealer, they gave up and said they could not fix it. Owner said he had an auto mechanic look at it, he adjusted "something" and the bike would go 60 + mph again. We tried to reach the guy for comment but never could. After much research, trial and experiment, I finally reverted all tune up specs to the " as found" specs (which were considerable off) guess what fixed the issue? Instead of setting the valve clearance at the factory spec of .002, opening then up to .006 cured the overly rich issue. It really makes no sense, but there is a little more to the story. Apparently at some point the head was pulled off engine to replace some worn out valves and do other engine work. My theory is, some part was incorrect spec or some procedure was botched to cause the valve clearance spec to change. Different length valves, non-standard cam, incorrect valve timing, etc... Who knows! Morale of the story - just because a bike looks near mint, do not assume it has not been molested!
  2. Hey, Because I break one of these levers every year or so, does anyone know about an aftermarket replacement for this thing?? Getting tired of spending almost $100 for every repair. And now, my local Yamaha dealer tells me he thinks that part is discontnued. But if anyone one out there has any OEM levers for sale at less than retail let me know Thanks in advance, John:banghead:
  3. yozuri

    1984 TT600 Carb Issue

    undefined Just brought a 1984 TT600 back to life. Had to replace the CDI unit and clean the varnish from the carb (bike was sitting idle for 16 years!) Bike starts rather easily and will idle, but when warm after riding around and coming to a stop it will die. It will then restart but will not idle. I'm going to pull the carb again and do a more thorough job of cleaning, but was wondering if anyone has any other suggestions. This is the model with the weird two intake port carb (I also wonder how sensitive float adjustments are on these things) Any info is greatly appreciated - thanks in advance.
  4. Have a 1984 TT600 that has not been started in 15 years! Did the usual prep....changed oil and filter, cleaned carb, adjusted valves and decomp cable, checked compression(OK), did shop manual diag on pickup and regular coils (OK). Couple of things: Spark was kinda weak until I bypassed the stock plug cap - then it was fat and blue. Is it OK to use a non-resistor cap? Next - the thing will start, but will not idle and dies when any more throttle applied. I suspect more carb cleaning and/or adjustment. The manual says the mixture screw is "preset" and does not tell how many turns out. I set it at 1 1/2 to start - anyone know if that is a good starting point? Any suggestions would be greatly appreciated. Would love to get this thing back on the trail again! (Although it is a mutha to kick over!)