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so, increasing the displacement and compression will not increase hp? how can you even think that? I have a 904'd 865, and judging by how my front wheel lifts off the ground I'd say it increased the hp!



I'd say you need to dyno it. HP isn't going to lift your front tire- unless your a) dropping the clutch at redline, or b) pulling roll ons at upper RMP's. Typically, HP is made near the top of RPM band; torque is made at lower RPM.

The 865 was intended for and designed to put out more torque than the 790- at the sacrifice of HP.

So, to answer your question of how can I think that- I'll reiterate. Upping the compression and gaining 40cc is not going to produce huge increase in HP on the 865 (because of the cam profile). I think your making the assumption that I stated it would not make more power. I didn't say that. It will make more power, but in the form of torque; which is what would be pulling the front wheel up.

The discussion up to this point have been around making horsepower. My point was if you want HP out of the 865- you will need to do something with cams. If you want more power, well, either will make more power...

Redlight-to-redlight, torque is your friend!

2002 Bandit 1200/ GSXR cams/ 1277 BB Kit/ Holeshot header and can/ 38mm flatslides/ a good head/lotsa hp/lotsa tq- lots of rear tires...