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YPVS Controller Modification - An extra exhaust curve for TZ250L.

I've been working on some YPVS controllers for Pete(GB), Gavin(GB) and LES(CA) and I just found out a new exhaust valve curve that I want to share.

Pete owns a Tz250H converted to an L (electronic power valve). I have a few TZ250 (mostly reverse twins) exhaust valve curves on the blog but the below one is new to me.



Recent posts

Paul's Nsr250 Mc21

Many thanks to Paul(USA) for the photos of his Nsr250 and his kind words about the Battery Eliminator.

I purchased your battery eliminator for my NSR250 and it works great. Bike starts easily every time. Thanks, Paul



This blog is now 9 years old.

Time goes by like a two stroke motorcycle and this blog is now nine years old.


RZV500R

Many thanks to Terry(UK) for using my sticker on his magnificent RZV500R bike.



TZR125 Kenny Roberts Paint Scheme

Many thanks to Tom(UK) for the photos of his lovely Tzr125 bike.





Nsr250 PGM Spacers

Lazy afternoon at the workshop, turning some spacers for a NH3 PGM unit.








Yamaha SDR200

I had recently repaired - modified a YPVS control unit and also made a custom SDR200 leak down tester tool for Matthew(UK). The Sdr200 is a unique bike with a Trellis frame. The YPVS exhaust valve curve is also unique to this model. 

And here are the YPVS settings, specific to the SDR200 model.