RZ 250 to 350 top end swap advice

[RZ-stroker]

Hi again guys back for some more advice,
when swapping the top end how much other parts will need to be changed from the loom?
i assume the ignition module?? How about the plastic plate connecting the PV cables to the PV's?
i have most of the mechanical parts sorted out now, just need to think out the rest of it, anyone with experience in this field please let me know what you needed to do.
thanks alot guys, RZ-stroker

[aaronmvrider]

loom and ignition are exactly the same .. powervalve pulley is also the same
its more the carbs and jetting etc...

[Nath]

The hardest thing now days is finding a 350 spec oil pump, if you have that you are most of the way there.

Watch out with the 250 Powerjet Carbs as they are difficult to make work on a 350.

[JonW]

This should help...

RZ/RD 350 & Misc. 2-Stroke Tech BBS :: View topic - Converting an RZ250 YPVS into a 350... the definitive guide!

[RZ-stroker]

thanks for the replys guys, helps out alot.
So apparently i need to change the CDI as the ignition curve is different. I have a 350 oil pump i brought from ebay US, also need the 350 oil pump worm driveshaft.
I will be posting a wanted ad on here for these as i cant find much online right now. any help would be great.
I am hoping to upgrade my 250 carbs to 350 specs, which i have found advice on here to help me with that.
i have all the other parts sorted out now i think.

[Sean'o]

I have no idea what the difference is on the ignition curve, but i ran mine with a 250 cdi for a while before i scourced a 350 one, the seat of the pants dyno said there was no difference at all? As for carbs, I got a little lazy, a lot of stuffing around to set them up, you can get a set of 28mm flat slide kehins, jetted, ready to go for around $400, just another option if you have the cash. For any bits and pieces or advice, try the two stroke in qld, Steve is very helpful, may have the worm drive your after.