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  1. chelminski

    Maximizing Velocity in Two-Stroke Engine Intake Manifolds: Why Speed Beats Volume

    I think it's not worth blaming the suppliers for the lack of dyno results. It's not easy to obtain them. I believe it's great that there are people who dedicate their time and money to developing new products, and they certainly aren't making a fortune from it. I encourage keeping this...
  2. chelminski

    COMPLETE YAMAHA GP1200 NON-PV ENGINE 65U

    @lonczakd looks like it’s for sale one more time https://m.facebook.com/story.php/?story_fbid=8547594428603090&id=1759780344051233
  3. chelminski

    Maximizing Velocity in Two-Stroke Engine Intake Manifolds: Why Speed Beats Volume

    I understand that it's ideal for the space under the piston, as it moves upward, to fill quickly with the correct amount of mixture, ensuring it doesn't back up, is properly balanced in terms of fuel-to-air ratio, and is evenly mixed throughout its volume. But would you say that speed is more...
  4. chelminski

    COMPLETE YAMAHA GP1200 NON-PV ENGINE 65U

    Is there any chance that you haven’t sold the engine yet and it is still available?
  5. chelminski

    Jumping timing mark during test

    Thank you very much for your comment. Yesterday, I bought a wheel with exactly those numbers (290886598). If someone could comment on the shifting timing mark, I would be grateful.
  6. chelminski

    Jumping timing mark during test

    In fact, it's an interesting idea. The only downside is the exhaust gasket replacement. @WFO Speedracer do you happen to know the exact part number for the flywheel for the SD951 with two teeth? I know what the differences were. All models from and including 1999 had four teeth already. I just...
  7. chelminski

    Jumping timing mark during test

    During the ignition test, the timing mark moves and does not stay in one position. This is not caused by the changing ignition angle because I uploaded a flat curve of 12 degrees and I am doing the test at 1500 RPM. The RPM is held very steadily. I decided to write to you for help. Maybe you...
  8. chelminski

    Super Jet Battery tray for noco nlp14

    It looks very nice and saves space. How is the durability of this material?
  9. chelminski

    Freestyle Iridium spark plugs

    I think that #ZERO has written quite negatively about iridium spark plugs a few times. I don't have any experience with them.
  10. chelminski

    Freestyle Iridium spark plugs

    Is there an equivalent of the BR8EG spark plugs but with an H thread length?
  11. chelminski

    VK Composites

    https://rivalpwc.com/hyperion-1
  12. chelminski

    VFORCE 2 carbon reed imperfections

    Are you sure that the sandwich effect you mentioned will occur with the VForce 2? I think this happens with the VForce 3, while in the VForce 2 version, the primary clamping is achieved through the two M5 screws that secure each of the reed cages. The intake manifold will probably be in direct...
  13. chelminski

    VFORCE 2 carbon reed imperfections

    I bought two new VForce reeds. One is completely flat, but the other is slightly twisted. When I place them both on the table, one lies flat and doesn’t move at all, while the other wobbles slightly. It’s as if someone grabbed it from both sides and twisted it a bit. Should I be concerned about...
  14. chelminski

    Weeks Brothers Products

    I'm really impressed with your response, and I'm glad there's no more drama, just a cool conversation between people who share the same passions!
  15. chelminski

    Weeks Brothers Products

    @bird @holygoat Let's share something positive to appreciate Weeks Brothers initiative and efforts. @ScottS posted a really cool message that will help a lot of people learn about these products. Why criticize when there's so much negativity in every aspect of our lives? Can't this forum be a...
  16. chelminski

    Zeeltronic ms01

    Does it appear that the ignition curve of the WAX V3 with Zeeltronics Y62T CDI is more aggressive than the ignition curve of the MS01?
  17. chelminski

    Hull Sold

    Perhaps someone in Europe might be interested in swapping an XFS Ninja for a beautifully restored 2011 full carbon XFS (work done by Dawid Makula, hull comes from Thomas Wolf). Unfortunately, I bought a very powerful setup for flatwater, and I think I should switch to a lighter hull. Ninja can...
  18. chelminski

    WTB Yamaha 800cc PV crank parts

    I've checked all the major retailers that show up on Google, and even though some claimed to have it in stock and I made the purchase, I ultimately ended up with a refund. I've also reached out to companies in Japan, but it's been a similar story. Of course, things might change in 2024, and...
  19. chelminski

    WTB Yamaha 800cc PV crank parts

    Bump.
  20. chelminski

    WTB Yamaha 800cc PV crank parts

    Thank you very much @Moto360
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