If you know me, I am always playing with things.

I set out to get 55HP & got just short of 57HP so yes I am happy with the bike, it pulls real well strong mid to top end power. It pulls all the way to the rev limiter, with hardly any power drop off at 7200RPM.

I would prefer a little more bottom end power, I am already working on that & will have some answers after I have tested the standard Raptor & standard XTX cam with the 700 conversion. As well as some other mods that need testing on the dyno.

I would expect 60HP + with a stage 2 cam & even more with a gas flowed head.

At 57HP there is a 26% gain in power & torque which is a good result in it's self.

Thats a great gain in power but not trying to be off putting would you think its a good gain for the amount of money youve spent??

Kev, thanks for the results. Looks a bit as expected don't you agree? About the torque, what is the conversion factor to Nm (Newton*Meter)? I can see almost 50 ft-lbs, how much is that in Nm? Your not driving a XTZ660?! Looking forward to further mods/results by Kev ;)

Greetings

Marcel

Price of mods if bought in Australia to HP gained

PCIII $450 + carbon cans $1200 + DNA stage 1 & 2 filters $200 Total = $1850 divided by 6HP gained = $308 per HP

Big bore kit including all parts $900 divided 6HP gain = $150 per HP

All the above parts fitted are without labour, even if you double the amount of the big bore kit, it is still good value for $'s to HP ratio.

The big bore kit was the cheapest mod to gain in HP for me, as I did all the work myself.

57HP = 42.5KW

50lbs/ft = 67.71 NM

Sadly for the rest of us poor *******s, we'd have to pay for the labour and by the look of the work that went into fitting the 700 kit - it would be prohibitive. Would you like to hazard a guess as to what that would have set you back if you'd had to pay for the labour?

I would say $800 would cover the labour easily, that would give the bike shop 11.5 hours to do the job, it can be done in 9 hours.

very good bit of infor about the prices there Kev, thanks. It seems like a very good mod really if you think about it. I wonder if Yamaha where to see this and would they up the size of the XT to 700cc?!?!!?

The higher the HP you want the harder it gets & the more it costs to get there. To get the next 6hp would cost a bit more then quoted.

If all the engine mods are to be done at the same time it would cost less in labour.

Next mods could be +2mm throttle body, +1mm inlet valve, a good port job, stage 2 or 3 Hot Cam, 105mm bore, 12.5:1 piston kit, O ring the cylinder, the list is endless. The more power you put through this motor the chances are it will break if we go to far.

The Raptor stage 1 Hot Cam conversion is only a mild engine tune. We could get alot more HP from this motor.

Glad your having fun with the motor kev. Ive always wanted to do something like that just not got the knowledge yet or the time.

Would really love to have a stab and making my own trike. buy a tilting rear end and just go from there.