2 Strokes Down Under

dyno time booked in... 4th of march at KTM werribee

a quick question, and excuse me for being so blunt...

can we see some bloody photos of it already? haha

just bought my paint... ferrari rosso corsa

Have been busy in the shed every night this week bogging, sanding, primering...

Shes almost ready for fred99999 to paint her this weekend

it was built to bolt onto the bikes custom engine mounts, no reason why it wouldnt fit the rz. but I wouldnt sell just the rad by itself

Hi everyone, As I am saving up for a home deposit it is time to unfortunately sell of a few of my toys. I have for sale my precious 421cc RZ250 motor with the following features -based on an RZ 250 bottom end -very low hours (barely broken in, rings only just bedded in) Bottom end -4mm stroker crank...

2 cranks spinning oposite directions cancels out secondary vibrations perfectly.

secondary vibrations are the type that you 'feel' the most when riding the bike.

if you go 90 degs, you then have harsh secondary vibes from 2 cylinders

its all been done and tried before.

there is a reason all parallel twins are 'twngles' (0 deg firing)

vibrations

have you checked to see whether you can buy a new clutch or a decent second hand one? or you will need to replace the inner rubber either by purchasing new OEM rubbers (doubt such a thing ever existed if its riveted together) or have new rubbers machined up. The other option ofcourse is to solid mou...

yeah, I got everything finished and had a full day at the dyno booked in. But the bloke who was going to lend me a roller starter pulled out so I had no way to start the bike. So the dyno day was cancelled. I will be popping it on the KTM werribee dyno in a few weeks instead, there dyno has a roller...

Its a road race engine so you have a super-tall 1st gear and then close ratios after that

Sprockets will help a little, but the gearbox will never be properly suited to offroad

Not that R, its not showroom condition or original

I think buying and restoring two S's would be better as they will appreciate in value more as they haven't increased in price yet!

Its been a busy couple of weeks. -I've been doing the many remaining odd jobs to try and get the bike ready for the dyno on the 23rd of Jan. -I've restored the jetting back to OEM which required a few needles and jets. I think now she is running a 170 main, 48 pilot, NOZH needle 2nd clip and a #7 sl...

if thats all it needs, then thats all it needs

you're better off doing a compression test to check the rings, pill the cylinder off and inspect the piston and bore.

If everything is OK (piston isnt worn/damaged), clean everything thoroughly, install new small end bearings and put it back together!

That sharp bend straight out of the exhaust port is not going to be great. I think I remember lozza mentioning that a nice straight section out of the exhaust port is ideal. I applaud you for having a go though.. I'm all about it. my thoughts too, even a MX bikes bend in the header kills a few hp s...