POWER

[patrick2wd]

too bad those mikuni's are expensive, a complete (kedo) set costs about €440.- ex shipping..

[nop]

i fitted new carbs off a suzuki 650 freewind which improved performance 

Pasted from <http://www.horizonsunlimited.com/hubb/y ... 600e-43298>


I also recall somewhere something about DR650 carb and 250 ninja carbs.

[Mezo]

OK id like to keep this "Power" thread happening, so much so ive made it a sticky only because i have this magical thing called plenipotentiary.

Regulars will get that joke.

So anyhow, i was watching these fella`s on the tube with a raptor engine on the Dyno (allegedly) pumping out 105 HP

[youtube]GgPdw2DVsK0[/youtube]

So if that`s true (itchy beard) but if it is true that motor with some encouragement should drop in any XT frame right?

Mezo.

[GeoffD]

No way.... 105 hp....... I don't believe it.....

[Mezo]

No way.... 105 hp....... I don't believe it.....

Im with you on that Geoff, not out of a single.

Mez.

[xtzrick]

I've got a write up somewhere about a Dutch bloke who raced singles, made his own engines.

A 90HP 900cc single

I'll dig out the pics of what it took to hold it all together.

105Hp out of a single, there's always THIS option ( )

Rick

[Mezo]

Well that maybe what he was doing? it certainly went like fuck in fifth gear & notice his front tyres (very dragstrip)

Mezo.

[xtzrick]

Trev, the wizard of NOS, told me he reconed standard engines are safe to about 50% extra HP with nitrous providing everything was in good order, so 70-75HP on an XT engine.

This is the van der Starrer brothers 90HP at 9000rpm, 900cc single


This is how they strengthened their mahle piston from a Steyr diesel


& this is what it did to their Carillo rod 1st time under load


So they made their own rod (or had 1 made special)

However that Raptor makes its power, it must have some strong shit in its guts.

Rick

[NordieBoy]

Well i understood most of it but got lost on some stuff, its certainly the bible on fuel injecting a thumper.
Richy (me old mate in Perth) has put a 780cc kit on his DR650, its got my old ported head on it & goes like the clappers.

Imagine if he FI`d that beast, its only 20cc of the biggest thumper out there the DR800 DR BIG.

We managed to get 54hp (from memory) out of Richy`s bike when he had the old 720cc kit on there.

Mezo.

The DR800 was 780cc so Procycles 790cc kit is quite large...

[Mezo]

The DR800 was 780cc so Procycles 790cc kit is quite large...

I didn't even know they had gone up another 10cc Fran, Richy`s (thealien) was the last i heard at 780cc, so that would almost certainly be the biggest displacement engine on the road today, thump thump.

Imagine that with fuel injection (or is Rob doing it already?)

Mezo.