Will be Selling some pre 75 race bikes

[firko]

I've had a couple of SC500 Yams over the years...one a stocker, the other in a Champion frame. The engine in the Champion had been modded in the USA back in the 70's and worked a treat but handled like a bucket of shite in the flexi frame. I had some problems with the pistons cracking around the gudgeon area so I welded up the little cutaways next to the gudgeon and that problem disappeared. I also fitted a rewound points magneto (can't remember the details).  I sold the Bike to Edgar Phipps who braced up the swingarm and fitted a very trick engine with a CR500 Honda piston in a new sleeve and a 5 speed trans, with out the omni phase balancer bullshit. That basic engine in a stock frame and road race wheels topped 120mph at Bathurst with Brian Clarkson on board back in the 70's so getting serious performance out of the big lump isn't impossible...you just have to know the tricks. A 38mm carb on methanol a modern pipe and V Force reeds work a treat at well.

I saw the YZ500 of Lawsons a few years ago and I must admit it's a nice swap. Because of the rarity of the YZ frame it's probably not a sensible swap these days.

[Rossvickicampbell]

well I would suggest Freaky that if you had an SC500 motor spare and a YZB frame excess to use (lucky bugger) then why not!!!!  And after seeing our Kiwi compatriot Mr Ploen on it at the 15th Anniversary it fair flies.  Some inside engine mods (minus the decomp etc I think) and the "old" motor faults are gone and putting it in a YZB frame means it handles significantly better than the original frame - and voila - maybe what Yamaha should of built.

I have ridden Pete's a couple of times - and geez it's good.  Haven't ridden the other one yet but might have to work on that!!!!

And there is a YZB frame on Evilbay at the moment - for a modest $395USD plus shipping?

[Tim754]

A "revamped combustion chamber" SC500 VMX Sidecar. Mmmmm Freaky sometimes you really hit a sweet spot. """If """  the home finances were available, they are not... I would love that build challenge as I do have a spare universal Wasp sidecar frame or two....Mmmm    Tim754

[Freakshow]

Some inside engine mods (minus the decomp etc I think) and the "old" motor faults are gone to work on that!!!!

IM sure its more than just remove the Decomp.  I got 3 sitting here waiting for somthing to fire me up, i have a spare champion Yam 3 that it will bolt up to, so if you can find me the spec on the motor, look out Dt nats 2011.  thats could be a laugh

[Davey Crocket]

You are a freak!!

[Freakshow]

HEy davey send me the spec on your 125 too, as ill get round to putting the other 125 back together over xmas hopefully and you tell of making them run with the elsies, so ill give that a try too if ya like.  Just dont have time to do my own testing in trial and error so much.

[Rossvickicampbell]

yes Freaky - more than just the decomp - thats what etc means!!!  Mate - not back home for a month but no doubt will see Peter or Ray then - see what I can find out and let you know.

[Freakshow]

I saw the YZ500 of Lawsons a few years ago and I must admit it's a nice swap. Because of the rarity of the YZ frame it's probably not a sensible swap these days.

What about messing with a DT1 frame ? morphed into a YZa   i got a few of them here so that might be a cool swap ( i prefer twin shock frames anyhow ) and funnily enough i like the way the Dt1 handles, being tall maybe it seems to suit me better....

without weighing one id also reckon they be lighter than the MXa frame.

[LWC82PE]

There is a known sucessful SC500 sidecar around here from the the late 70's. Engine was in a Bultaco frame and had a home built outfit, and the engine had been converted to watercooled and was thought to have been the only watercooled converted SC500 in southern hemisphere. Anyway that bike won the 24hr twice. It took until 1994 for another 2stroke sidecar to win it.

[Freakshow]

Leith, WHo owned it, a local  ?

[martian170]

hi freakshow how much do you want for the tm250?

[LWC82PE]

Yes Freaky a local. Full stand up MX type outfits only came in a couple yrs later

[SAABCOMBI]

what price is the 125 yz A, going for.

[Freakshow]

Yes Freaky a local. Full stand up MX type outfits only came in a couple yrs later

Now thats an interesting little machine. I can see the water pipes/ radiator, few late nights and bush mechanics have gone into that one.....