Two Stroke Racelab

Even when I try to organize the lab, the worktable would still be, so to speak, a mess!

Some pics on how to setup the exhaust valves of your vj22 engine. 1) Turn the ignition "on". 2) Turn the kill switch to "on". 3) Find the "grey" wire that is located near the battery and most probably it's under the fuse box. Uncover the brass fitment and touch it to the ground terminal (-) of the battery. You should immediately hear the servo mechanism moving. While you are still keeping the grey wire on the earth terminal... 4) Turn the kill switch to "OFF". 5) Now, it's time to setup the powervalves. You should align the mark on the servo pulley to the second mark (there are three marks in total) on the cylinder. Keep enough slack on both servo cables (about 2-3mm) and you're done! Cheers!

I've been away for the last couple weeks as lots of electronic gremlins and a couple side projects keep holding me back.  After a lot of hard work and honesty with all the services that I provide, fruitful results have been achieved. I've met a lot of interesting people so far and that's what counts at the end of the day, helping and communicating with 2 stroke junkies around the world.  I've been working on a side project for the last year or so, a Ignition Simulator unit. This unit plugs on the pulse coils and allows to test ignition, check & setup power valves, check solenoids, speedo etc without running the engine. It seems like I finally getting close to the end product and I might be able to represent it here soon. 

I've been working on a friends bike for the last couple days. Lovely bikes...

I decided to sell my mc28, a lot of info about the bike can be found in this blog, just hit the Nsr250 tab.  Bike specs :   Nsr250 Mc28 R2R model, in good working order and ready to race. I'm using the bike daily and I have attended 3 races this year. The crank failed on September and it now has another one in with new bearings and seals. I only made the last race with this crank. Both cylinders are newly replated and in excellent condition. Bike runs on PgmII electrics. Some special parts on the bike: PVM magnesium wheels (3.5 & 5in), originally oriented for rs250 Nx5 Gecko ramair rs250 Nx5 Pj38 carbs and Nf5 carb manifolds vforce reed valves rs250 Nf5 radiator tyga subframe Rs250 Nx5 OHLINS rear shock  Handmade exhausts (from HRC schematics) Engine is tuned for Rm125 pistons (only the cylinder heads are machined and are both rear ones), it can be converted back to stock with new cylinder heads or doubled base gaskets.  ...

Suzuki RM125 pistons are a nice and cheap alternative for the stock Nsr250 pistons though some mods needs to be done. They are single ring pistons that are way lighter than stock but also not so trustworthy, so to speak. Perfect for racing/track use nonetheless.  Keep in mind that Rm125 pistons have about 0.6mm lower crown height than stock pistons. Also, check for any differences in piston dome height as there are a lot of different manufacturers for RM pistons out there.  Parts needed are :  1) Suzuki Rm125 '90-'99 pistons (obviously, I reckon). 2) Rm125 little end bearings, 15x19x19.5 (I think all years 'till now are the same but please first check). 3) You need to solve the difference between the stock and Rm piston crown height (if you do care about your compression ratio that is). There are three different options to follow:  a) Milling the cylinder base will get compression back to stock and will not alter port timings.  b) Milling the ...

Sakis Vasilopoulos raced my Honda Rs125 NF4 on the last race at Megara closed circuit. It was a great honor for me as Sakis accepted my offer and traveled from his permanent home in USA to Greece ...for one more time racing! Last time Sakis raced in Greece was in 1989 and since then he is attending multiple champions in the USA on classics categories.  Sadly, the bike didn't finish the race as there was a piston ring failure but I beleive we both enjoyed the process and I have left the circuit with many memories and many advices to follow thanks to Sakis. Sakis Vasilopoulos and Grigoris Chronopoulos, two old friends meeting once again at the starting line. Cherry on the pie, Sakis awarded all first racers with medals and I was lucky enough to be among them!  Once again, big thanks to bikerspirit.net for the pics! Cheers!!! 

Final race for the Greek motorcycle racing champion. It's the second time that I've finished at the 6th place but that's again down to my good luck rather than my riding skills. Anyway, here are some pics...   Pics taken from   bikerspirit.net

Race prepping the NF4 for it's first race...  The whole process took about two days and I'm exhausted.  Here are some notably pics of the process.  New Vertex piston. I have hand fabricated a powerjet for the PJ38 carb as it is a handy modification. And a home made expansion chamber. This took about -almost non stop- 18 working hours! Handmade paddock stand as well. Not rigid enough but it does the job well.