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Hi,<br>Does someone know how much different is in lift/duration between YZF750 and FZR1000/YZF1000 cams?can i use them in the 1000cc engine on the street? <p></p><i></i>

YZF750R Intake lobe height - 32.60 - 32.70mm<br> Service limit - 32.50mm<br> Exhaust lobe height - 33.00 - 33.10mm<br> Service limit - 32.90mm<br> Journal diameter - 24.437 - 24.450mm<br><br>YZF1000R Intake lobe height - 32.50 - 32.60mm<br> Service limit - 32.40mm<br> Exhaust lobe height - 32.95 - 33.05mm<br> Service limit - 32.85mm<br> Journal diameter - 24.437 - 24.450mm<br>Oil clearences are the same. Hope this may be of help.<br><br><!--EZCODE EMOTICON START :cheers --><img src=http://img.photobucket.com/albums/v209/ ... Cheers.gif ALT=":cheers"><!--EZCODE EMOTICON END--> David<br><br>Speeding Officer??..I was just making progress!<br> <p></p><i></i>

this is actually quite interresting... <br><br>has anyone got an insight for this? can the stock yzf750s be used in fzr engine? with wisecos? or do i have to mould clay on top of my pistons to see for my self next winter.<br><br>*this never stops... ill mod the poor yzf from here to eternity* <!--EZCODE EMOTICON START :D --><img src=http://www.ezboard.com/images/emoticons/happy.gif ALT=":D"><!--EZCODE EMOTICON END--> <p></p><i></i>

So all that tells you is that the lift is the same or close as buggery, but tells you nothing about duration or timing. So even if you throw them in as an experiment you will still have to check clearances. <p></p><i></i>

When I built my OW01, Cams were a big issue, as far as I know OW01 cams are the most radical of the Pre1998 FZR/YZF family, posessing the greatest lift and duration, as per my mechanic! Infact of you visit Megacycle cams website, you will see that stock OW01 cams are the an awsome street / race profile, as you get max HP with a strong midrange! If you went kit profile you lost all low end. My OW01 engine is 100% kit minus Cams whice are OE, I took the engine from 98.8 stock horsepower to 140 minus the ram-air, dyno verified (#'s will surpass 150 with ram-air) Kit Cams might add 4-5 Hp, but for $1,500 for purchase and install, and the degradation in low end I tanked that idea! For specific questions ask me @ burns_jb@hotmail.com <p></p><i></i>