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bikingdad2

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    18
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About bikingdad2

  • Rank
    TT Newbie

Profile Information

  • Location
    California
  • Interests
    Riding bicycles and dirt bikes
  1. bikingdad2

    Compression test

    Adiabatic compression does happen in engines all the time. This is the reason diesels work. The heat generated during the compression stroke is enough to spontaneously ignite the fuel. Diesels can work at compression ratio's down to 14:1 and that is probably why you don't see gasoline engines running at 14:1.
  2. bikingdad2

    Compression test

    Your compression will probably be higher than 175-180. If you compress gas slowly and keep the gas temperature constant, then the max absolute pressure is the compression ratio times the ambient pressure. But, kicking the bike over results in the pressure changing rapidly and makes the temperature increase and that raises the pressure more. This is effect is called adiabatic compression. So, let us know what you get, but it should be higher than 175-180. Also, make sure the throttle is wide open when you run the test.
  3. bikingdad2

    2008 Models (the FI question and debate)

    Thanks I am considering getting a 06 450X, but I wanted to know if I should wait until the 2008 comes out and buy an 07.
  4. When do the new year Honda models typically get to the show room?
  5. bikingdad2

    Problem with removing lower fork tube

    The slide hammer did not work to remove the fork seals, but believe it or not, I was able to use a tire iron and some major leverage to work the seals out. Thanks again for your help!
  6. bikingdad2

    Problem with removing lower fork tube

    The air impact worked no problem. thanks alot. any good ideas how to get the fork seals out or do I need some sort of special tool. I tried a slide hammer with a hook, but it tears up the seal.
  7. I am trying to replace the fork seals on my old Yamaha IT 175 and I can't get one of the lower fork tubes off. When I turn the allen head bolt on the bottom of the tube to loosen it, it just keeps turning. How do you keep the damping rod from turning inside the fork tube while loosening the allen bolt??? Thanks
  8. bikingdad2

    Stalling 94 DR 350

    Thanks for the help, I will pass along to my bro and will also post the note on the DR forum.
  9. bikingdad2

    Stalling 94 DR 350

    My brother has a 94 DR 350 that runs fine when the engine is cold but barely runs when the engine warms up. It seems like the engine is starving for gas at low and high throttle opennings and barely runs at mid range. We took the carb out and cleaned the jets and needle and seat and It still does the same thing. He also tried switching to prime setting on the petcock and that did not help. Anyone know a fix for this problem? Thanks Marshall
  10. bikingdad2

    Stalling 94 DR 350

    My brother has a 94 DR 350 that runs fine when the engine is cold but barely runs when the engine warms up. It seems like the engine is starving for gas at low and high throttle opennings and barely runs at mid range. We took the carb out and cleaned the jets and needle and seat and It still does the same thing. He also tried switching to prime setting on the petcock and that did not help. Anyone know a fix for this problem? Thanks Marshall
  11. bikingdad2

    Front Springs

    I kept the stock rear spring and it works well. Make sure you set the race sag at 4 inches. The shock was revalved by Too Tech and has lower damping than the standard setup and it rides much smoother compared to the stock shock.
  12. bikingdad2

    Front Springs

    I installed the .48 fork springs a few months ago and really like the way the bike handles now. I don't have a perfect comparison because I also had the back shock revalved at the same time but the front end seems alot lighter and floats over the bumps and whoops better. I weigh 200 lbs so the stock fork springs were way too soft.
  13. bikingdad2

    light flywheel for XR 400?

    Thanks for all the responses. It looks like there is nothing in the aftermarket and I don't want to machine the flywheel down for safety reasons. The reason I asked is I had a 1974 CZ 250 2 stroke many years ago (very heavy flywheel!) that I adapted a a Yamaha 125 flywheel and it made a dog into a rocket.
  14. bikingdad2

    light flywheel for XR 400?

    I am used to riding 2 strokes and have switched to a xr 400 (1997). I would like to get better throttle response and acceleration like a 2 stroke and was wondering if anyone has tried a lighter flywheel?
  15. bikingdad2

    new rear shock for XR 400

    Can't be rebuilt. Part of the shock came apart on the inside and heavily scored the bore of the shock housing and the piston and rod also. I took it to a shock specialist and he said he could only save the spring and outside hardware. A new 96-97 shock assy minus the spring is $668 and a 98-04 is $555 (on bikebandit.com) so I could save some money on the later if it would fit.
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