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These two are on xscafe site, totally different in design with the top one having cut the back of the engine off with the other bike having two full engines by the look of

Seen pictures of a double engined one but never seen any of it being run, would be interesting to see how much better it would be

Manifolds are about 4 1/2 inches, length to end of velocity stack around 9 1/4 "

Just about finished now, unfortunately due to a fatality where I race there are still investigations ongoing as to what happened so won't get to run it until next year

If the cranks been welded its possible the weld is too thick and catching the case, spin it a few times take yhe cases apart and see where and what is catching as there will be catch marks on the casing

I don't have top speed recorded, only speed at 1/8 and 1/4, mine is obviously c94

Just as a point of reference, Heiden used to recommend 148 mains in Dellortos I run mine on 132s there was very little change in colour on the plug but sorted the misfire,

Have you tried going the other way with the jetting, despite the plugs looking lean, if there is a large overlap it normally spits it out of the carb not the exhaust in effect making it have more fuel as it is the pulling this fuel in, I have a massive overlap on mine and have had similar...

Gear and brake linkages have now been done, for ease the brake is virtually a standard setup using xs650 brake rod, just had a tube welded to the frame for the original linkage to fit through, luckily with the gear linkage I found a bent up lever already made up in the garage which was lucky as...

Hopefully they will come down to a reasonable price, it's not like they only made them for a few years like the suzuki gs, Summerbud have started listing spares at a reasonable price on ebay, was starting to be almost unviable to run mine with what it was starting to cost if anything broke.

Slow progress lowered the forks by 4 inches and finally found a fuel tank that's now fitted, with this in place I can lie along the top tubes.

What we're your times?

Start it like a big single, get it just over tdc then kick, but put all your weight on it don't think you can just kick it over

https://thexscafedotcom.wordpress.com/2011/09/13/xs650-ouow72-heads/ That's funny, I've seen several posts over the years with people saying they have an OU-72 head and the differences, everyone has failed to mention their head is totally useless without this very odd looking cam

https://m.facebook.com/story.php?id=1105101022859451&story_fbid=7656237734412381

Xs650

Can someone explain how the cam on the right works, ive seen a couple on Facebook the last couple of days and just cannot work it out, the lobes seem to be 180, degrees apart with the cam moving at half the rate of the crank this would meen the piston would be travelling in the direction as...

I think I can work out what your doing now, you are using 7x 3.5mm xs1 plates instead of 8x 3mm plates and then taking up the difference with the standard pressure plate Can you post a picture of the other side of the hub and pressure plate just to make sure you have what I think you have

This looks to be the same as the clutch on the left originally a 6 plate so have to use standard clutch plates, need to square off the round corners on the basket so the clutch plate fits as low as possible, the original one that halco copied used to file the corners of the bottom clutch plate...