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Cool, that was my first bike. It broke down within a week, good luck with yours :laugh:

Is that a circuit bike, or do you ride it on the street?

So you are probably from Europe, not America. Because Hercules is German and Sparta is Dutch, and I dont believe they were exported to America.

Thanks, I did not expect a lot of possitive reactions on such a small ped.

It's not a very big bike, but it usually gets me where I want to go: A 1978 Yamaha fs1 'fizzy' Originaly these things have 1,2 hp, but this one is tweaked a bit. The exhaust and carburateur come from the motorcycle version and the cylinder head is adjusted to build more compression. My guess...

Never heard of anything like that, and it is obvious why: probably too little room for such an engine, ridiculous amounts of strain on a frame that is not built for it. If you conisder all the work and costs of such a project it would be easier/cheaper/a better ride to buy a proper r6

Nice build ;)

This story has slipping clutch written all over. try to adjust/set your clutch, or your plates are not under good condition anymore

I would also luike to enter this give-away

The battery is required for the actual ignition. The charge goes from coils to battery and then from battery to sparkplugs. So install a good working one EDIT: bullocks vfost beat me to it ;)

WOW, love the JPS paintjob/stickers. You work pretty darn fast, rebuilt a scrapheap into a neat tracker in a month :eek:

They really look asif they are proper high-end aftermarket brackets. Looks really cool and unconventional

I believe the cilinders from a 400 fit on a 360 block. However I wouldn't make the effort, you will probably notice a difference but keeping money and time in the equation it will not be worth it I belive.

:banghead: There are so many dutch beers that actually taste great, yet somehow only the crappy ones make it abroad. Cheers mate :laugh:

That is not completly correct i believe. The only problem you will get with a higher compression ratio is that you get spontanious detonation wich will completly screw up your pistons, the only way to get around this is by using a gas with higher octane ratings. I dont know if these are easy to...

According to "4 stroke performance tuning" by A. Graham Bell (look it up) you should raise the compression ratio on a Yamaha xs 400 from 9,2:1 to 10,2:1 and you should fit a free flow exhaust and intake to enhance performance. So you can probably mill down a lot

like the exhaust, built it yourself?

Just realised that you were all talking about miles, and since im in Europe we measure im kilometres :doh: should be 32k :laugh:

Impressive, very good how-to. This should be on the home-page :thumbsup:

1977 (i think) with 52k :eek: