RZ/RD 350 & Misc. 2-Stroke Tech BBS

Okay. Seriously... Has ANYONE ever actually built a +7mm OEM cylinder engine??? Yes I have!!!! If I remember right you end up with around 2mm (maybe a little more) positive piston to deck height as appose to 1.25mm for a +4mm stroke so nothing amazing there! Just be realistic with your power goals,...

@ Smoker Just keep it simple apart from whats been mentioned in this thread your guy should concentrate on the exhaust port to achieve the best blowdown of the cylinder can't stress that enough. As for the dowels and there fitment a nice interference fit in the barrels and a little looser in the hea...

Mark is correct in what he is saying! As you have CNC machined heads they SHOULD be machined to the correct spacing of 102mm, I use hollow dowels to locate heads. The head studs run through the hollow dowels, so you will have a counter bore in the cylinders and counter bores in the head to line up t...

I use a spacer and machine the bottom of the cylinder to achieve to port timing I like! It would be highly recommended to dowel/register the cylinder head as there is so much slop between clamp studs and head. Removable insert will be just awesome but they need to be in the correct position to the b...

Smoker there shouldn't be any secrets using OEM cylinders with a +7mm stroke, you will be looking to set the cylinder so the EX is at 196-198* and the transfers will sit around 130* nothing you can do about that. A spacer will be needed along with a dowelled head

That would have been that Dumb ass Roger Looks like Roger's business is thriving! :smt003 https://m.facebook.com/Wickedatv/" onclick="window.open(this.href);return false; Good for him I wish him all the best, but you can't take away some of his silly idea's and recommendations like a spac...

JonW wrote:Ahh, but I didnt think Glyn was doing work on bike stuff anymore?

Your right Jon I'm not doing much bike stuff at all these days,I've kinda wondered into the performance marine world. That plays the bills and i can get a 2-4 at the end of the week lol.

nokturnal wrote:
Just saying that’s where the recommendation MAY have come from. I have no idea.

That would have been that Dumb ass Roger

31k are best EX port will sit at 196/197* and your be able to change the transfer roof angles with out going to high on the timing!!!!

The only real answer is how deep are your pockets?

I will be running off a bunch of stroker pipes in January 2018, I have 7 sets to make anyway along with some 350 pipes. So if your wanting some message me at gplracing@hotmail.com

What a pile of shit

If your seeing deto at that rpm I'd look at you static comp ratio the delivery ratio of the pipe. Like Kenny pointed out pv will change the dynamic comp ratio, your right on the point of max torque. I spent a huge amount of time testing before the PV opens and the shape of the exhaust port floor to ...

He's dead RIP Nicky great lose .

Hey bud what do ya need to know? Hi Slinger - love your work Do you still have or could you make me a cradle & engine mounts to suit RZ350 motor going into TZR 4DL frame. Happy to pay, I'm in Melbourne, Australia. I don't think I can help as I would need the frame to make the cradle. Sorry bud

Hey bud what do ya need to know?