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  1. Jack Hammer

    V-Max Speed Wobble (ran it up to 115mph and...)

    Death wobble begins with sideways motion. The first thing to create that is the 90 degree angle in drivetrain. That transfers to rear fork and engine mounts primarily. A quality set of polyurethane bushings will solve most of the erratic behavior. I decided to go full polyurethane and never had...
  2. Jack Hammer

    Towing with a dolly

    I found a workaround to this issue. I dollied my bike with the rear tire on the ground for 225 miles. I moved to another city. The issue was oiling the output shaft bearing. I overfilled the crankcase with 5 extra quarts of oil so I could see the oil level from the fill hole. Worked like a charm.
  3. Jack Hammer

    Towing with a dolly

    Thank you, I will not deliberately destroy my bike. I suspected this and now it is confirmed.
  4. Jack Hammer

    Towing with a dolly

    Thank you gentlemen. You confirmed my suspicion.
  5. Jack Hammer

    Towing with a dolly

    If the trans output shaft spins the oil in the gallery then it is ok to tow. I just don't know because I never split the engine. Others?
  6. Jack Hammer

    Towing with a dolly

    Can you tow a Vmax with a dolly? Rear tire on the ground. I'm wondering about the bearings inside the trans and their lubrication.
  7. Jack Hammer

    Five quick and fast Yamahas

    Those videos with their definitions are self- explanatory. No need to even watch them if you as a Vmax owner know what you have.
  8. Jack Hammer

    VMAX 1200 radiator fan performance?

    My fans kick in at half way up too, right on that barely visible small dot on the dial. Normal operating temp 1/3 on the dial. I also have a manual override switch but it has been as a backup only. Never needed it as of today. Fan temp switch swapped for earlier engagement too.
  9. Jack Hammer

    VMAX 1200 radiator fan performance?

    I've got a stock system with a cooler than stock thermostat. Never had any issues at all even in hot Texas summer with 110 degrees and sitting in traffic. I'd say it works damn good.
  10. Jack Hammer

    Broken Plug

    Interesting. I'll have to try.
  11. Jack Hammer

    Broken Plug

    There's always some shavings with cutting tools. The way to avoid that is to apply plenty of axle grease into the area that traps everything. PS. Since you like single malt, try Balvenie. My absolute favorite.
  12. Jack Hammer

    Broken Plug

    I'm glad you got it done. Good job.
  13. Jack Hammer

    Broken Plug

    A counter thread conical tap (screw extractor). Soak the broken plug in penetrant well before.
  14. Jack Hammer

    Oil Pressure Gauge

    Pressure gauge tells you about lurking problems. However, the problems never arise when you are riding nice. They arise when you are punishing the machine. Do you have time to look at the gauges then? I don't think it is relevant. Preemptive maintenance is the key.
  15. Jack Hammer

    New Member, Long Time Yamaha User

    Dirt bikes are awesome. I used to ride Kawasaki KX500s but now I'm too old, don't have the physique for that anymore. That means a Vmax is just perfect.
  16. Jack Hammer

    Reasons to remove the clutch?

    My two cents. Because the previous owner pulled the clutch then why did he do that in the first place? Clutch problems are not difficult to figure out. If the basket is still good, I'd get new friction discs and steelies and everything else needed after inspection of all parts. Then put it back...
  17. Jack Hammer

    EFI conversion on a Gen-1

    A Tee connector with that space would be very difficult to install without hurting the o-rings. You were thinking of prying it on with least possible shoulder? How do you secure it in place, how do you secure no leak situation? How do you connect between the two Tees? How do you import fuel, how...
  18. Jack Hammer

    EFI conversion on a Gen-1

    Would diesel commonrail tubes be out of the picture? After all, it would not be very practical to have a fuel delivery system that requires one to take off the intake manifolds in order to be removed. What is your fuel delivery pressure?
  19. Jack Hammer

    Smaller radiator

    I've always actually thought that the stock radiator with lower rated thermostat is a bit too much than what is needed. Texas summer averages over 100 degrees at worst for several months in a row and I never had any cooling issues. That is why I thought a smaller radiator with stock fans should...
  20. Jack Hammer

    Smaller radiator

    You have the same problem with stock radiator with a fender. That's why you have a radiator shield from factory.
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