Gen2 crank with 6mm stroke and 84mm pistons - Page 2

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Gen2 crank with 6mm stroke and 84mm pistons

This is a discussion about Gen2 crank with 6mm stroke and 84mm pistons within the Suzuki Hayabusa section, where you will Some say Busa's Dominate; My buddy had the exact same numbers...mph.....i told him to put a real regulator and real pump and fuel pressure gage...........anyway he went back to the dyno and got his shit straith.......your back half should

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    My buddy had the exact same numbers...mph.....i told him to put a real regulator and real pump and fuel pressure gage...........anyway he went back to the dyno and got his shit straith.......your back half should be around 30mph or more......sometimes on a streetire on a bad track the bike with a light rider might slip on the back half...so you lose mph.......mph is hp......
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    I have a after market fuel pump and regulator set at 57psi but I have stock injectors.

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    That whole package should be faster.I personally dont think the tire is going to make much difference on i went back and forth with the tires and never really seen no change except in prices.
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    Quote Originally Posted by Jonh Doe View Post
    That whole package should be faster.I personally dont think the tire is going to make much difference on i went back and forth with the tires and never really seen no change except in prices.
    the last part of that statement
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    Quote Originally Posted by fzr1125 View Post
    The bike will be on a dyno this weekend and should I take that Shinko hookup tire off and put something else on there. I here there is a 10-12 hp drop with that tire.
    when using the hook up at the track, what is your tire pressure? and when on the dyno, put a street tire on it, the hook up is to soft and you'll wear it on the dyno wheel. and what are you using to tune it, ie... powercommander, Bazzaz, ECU (boostbysmith)?

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    What's the dutycycle of the stock injectors?
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    if i did the numbers right, its a 1551 on stock injectors. I would very highly recommend a new set of large injectors and a good tuner. Dont worry about the small HP loss due to a softer tire on the dyno, unless you are just looking for HP numbers..... I had mine done on the dyno - 13.5 flat acrss the board, 11.1 on the track - keep in mine that busa AFR will drop on the track... Where are you located at?

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    I don't think its his injectors - they should be good for 250-275hp, he is probably @ 230 hp with that combo. Its probably the clutch or the tune.
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    I would still like to see the duty cycle on the injectors before I made any claims there - though with the higher fuel pressure, he may be able to back them off enough to make the difference.... either way, let the dyno and electronics answer the questions..

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    I had it dynoed with a street tire it made 237hp and 133ft lbs of torque and I never asked about the injectors duty cycle

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    what was your AFR at the dyno? do you monitor at the track?

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    Also I used vp 110 fuel non oxygenated

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    That good hp for that motor and fuel.It would pic up wit mrx01or mr12.But something is still going on with your et cause im 215 And i have a similar bike that goes 5.18 @136 and 8.12 165.

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    Quote Originally Posted by Jonh Doe View Post
    That good hp for that motor and fuel.It would pic up wit mrx01or mr12.But something is still going on with your et cause im 215 And i have a similar bike that goes 5.18 @136 and 8.12 165.
    how much does the bike weigh?...cut seat rail? slick?

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    I would check the tune I went through that to til I went to see Cecil at HTP he got it right
    slo poke

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