I've posted this on another forum, but thought I'd share the fruits of my labour with you guys seeing as you've all been such a great help...
A bit of background - I saw an ad for a track toy on a forum. The owner had it for a few months but never got around to getting it running, and the previous owner had it sitting in mothballs for a couple of years, but it seemed to have compression when I had a look at it and all the bits were there plus a few spares so we took the gamble and got it.
We generally got in and inspected, cleaned and flushed everything except the gearbox oil. The radiator has about a million little holes in it, and there was a fair amount of crud in the cooling system, brakes didn't work at all etc, but we got it running, I did a track day on it, met a guy from the forum here and spent most of the day fixing the dodgy clutch cable routing.
It didn't sieze on me at the track, but it didn't run too well either. Still had stock jetting, despite running premix. It sat around for another couple of months following this with me doing the odd bit here and there until just recently...
<SNIP>
So, I stripped the bike as far as I dared and had a look at the top end. The pistons look near-new, with only slight carbon deposits, no blow by, good piston to cylinder clearance etc. There's still hash-marking on the cylinder bore so its probably only a couple of hundred k's since the last rebuild.
Then I went to the (Aussie) GP and bought a HRC jet kit from B-Components. Came back, installed it, took the bike for a ride and even though it ran a heap better than before, it was still a bit lacking. So after I decided to go and get it properly dyno tuned by someone who know's what they're doing.
Here's the dyno chart: http://members.iinet.net.au/~nickopen/NSRdyno.jpg
The green line is as I gave the bike to them. The red line is after they unplugged the factory restrictor and the black one is after the final tune.
The fuel-air ratio is a bit bumpy up the rev range due to the bike vibrating and the needles moving about a bit apparently. Its a bit rich because I didn't quite have the right jet sizes in the kit and I'd rather run a bit rich than sieze anyway.
It does power wheelies pretty easily now anyway.
There's some video of me starting the bike and taking it for a quick ride this morning and a photo of the bike in my home directory.
http://members.iinet.net.au/~nickopen/
For those interested:
Purchase price $1500
2nd hand Radiator ~$100 I think
Braided lines $160
2 new tyres fitted and balanced ~$300 I think
Dyno tune $99
Jet kit $300
brake pads $60
Total = about $2500 + many many hours. pretty good I reckon for the fun factor.
<END SNIP>
So yeah, that's about 990 british pounds if you want a conversion seeing as most are in the UK.
Mods are pretty much just a "cut" airbox and running premix. Has a rear head on the front, but only a dodgy setup with the stock hose (almost melted it on the exhaust!).
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