500 Two-Stroke Tech

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Thanks for the kind feedback guys!!! It`s really appreciated I`m not sure if it`s the worlds most powerful RD500, but that would be cool!!!

(Tried to upload both pdfs and pics, but I was not able.. Have to try some more..)

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So, here`s an update of the TZR500 project! Had a water leak into the engine at last dynotest two-three years ago, which together with some other issues set me back. I left the project for a year, but now I`m back with good news! These are the modifications made since last time: New adapter plates 2...

Hi Alex Attached, you find a link to several pictures of Vdue inlet parts. Manifolds are FRP, FRP for Mikuni carbs 38mm carbs, Bimota Evoluzione, my custom 90 degree (which did not work very well). Reeds are polaris RMK800 and polaris RMK800 V-force. https://onedrive.live.com/redir?resid=4193A29E76B...

Hi again. Please confirm email Alex. Mail comes in return...


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Hi Alex! Mail is sent. I'm struggling with Tapatalk and photos..


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Hi Alex! Amazing work. I have a spare vdue engine myself, and will probably use it in a RS frame myself, after finishing some other projects. However, I must mention one issue with you're carb inlet manifold. Some years ago, I converted a vdue injection bike to an evoluzione with vhsb 39 carbs. I al...

Thanks! Yes, it's a track bike only. 145kg dry. Hoping to reach some more power with new main jets. New dyno results to come


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Hi guys! Finally did a dyno run yesterday. Engine runs fine, but went out of smaller main jets. The engine is therefor running very rich, and max power is only at 10.300 rpm. Got plug fouling on last run as well. I believe it will rev higher, hence producing more power when smaller jets have been in...

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Just uploaded a start up video of the bike Dyno test will be done soon!

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Very nice work! Does the taper on the standard rd500 lower crankshaft fit the taper on the tz4dp flywheel?


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Hi Bill! Thanks for you're comment. This forum has for sure helped me a lot finding the reason for the strange wear marks and understanding of how this all works. Thank you all for you're input with a high degree of know-how on the two-stroke engines. As soon as I've done some more testing, I'll let...

Tube in stingers have an internal diameter off app 25mm, so I guess I'm on the safe side there. However, rear pistons are TZ 86/87 1RK, with modified top. Std are domed, but I have shaved off a bit to make them flat like the 4DP. Material thickness in top of piston is therefor somewhat thinner.. Had...