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Thread: FXR150 engine modifications?

  1. #16
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    25th March 2004 - 17:22
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    yeah those big clumsy frame spars should be the first things to go.

    pass the hacksaw Eugene.
    Don't you look at my accountant.
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  2. #17
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    6th August 2008 - 09:18
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    So does anyone know or recommend where I can go or who I can go to for the porting and bigger valves (or any other little tricks to the FXR engine)?

  3. #18
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    Yeah Rich's bro. .. . Course that might depend on if Rich pays him more to take a dive & discredit his name.
    Don't you look at my accountant.
    He's the only one I've got.

  4. #19
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    Other sensible option is Pete Sales in PNorth Total MC.
    Don't you look at my accountant.
    He's the only one I've got.

  5. #20
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    Or Ivan, -if he can decide whether to polish or roughen it. . .
    Don't you look at my accountant.
    He's the only one I've got.

  6. #21
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    6th August 2008 - 09:18
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    Has a good carb, will dyno when the other engine shit is done to tune it better. Exhaust is too noisy at the moment and will be replaced. Standard header pipe is on the bike. Bike handles better than an FXR. I don't have the experience or skill level of Fishy yet but I am trying. So where or who do I go to that can help with 5 more hp?

  7. #22
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    Oh thanks Dave. I would do Kelford Cams (Richard's bro) but that will cost a bomb with the shipping (like last time). Ideally something local would be perfect. I can do Palmerston though. Good excuse to visit my family.

  8. #23
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    Quote Originally Posted by F5 Dave View Post
    Yeah Rich's bro. .. . Course that might depend on if Rich pays him more to take a dive & discredit his name.
    He would do what ever you pay him to do. No team orders their. He has done it before. All he tells me is I better get shit together coz there some hot engines out their.

    A 5hp gain is a lot when you are starting with 19 or 20. Don't go to the dyno unless you want a number that is useless at the end of the day. You have a key to a track. Thats a very good thing. Hit the books. Go to the library and get the Graham Bell 4 stroke tuning book. Look at intake and exhaust. Yes port it but I can tell you now the standard head is capable of flowing 27ish hp. The valves are the big problem. Bigger is better where they are concerned. But it will cost.

  9. #24
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    I'm only interested in the Dyno for tuning the carb accurately but if you think going to the track and testing is good enough then that suits me. I have done that with this motor and I think I have it about right ish. How much do the valves cost and labour roughly?

  10. #25
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    You could get a CBR200 like I've got. But I need it cos corners are scary and pies are friendly.

  11. #26
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    Quote Originally Posted by hmurphy View Post
    ...... I personally think it's pretty obvious that I'm losing a fair chunk on some of the straights to the likes of Gavin's, Richard's and Andrew's bikes.........
    That may have less to do with outright horse power than you may think. Carrying a little more corner speed will result in carrying more speed down the straight which will give the appearance of more HP.

    For the record Qkkid was in my bed, not the other way round

    Quote Originally Posted by Yow Ling View Post
    Pumba is a wise man.

  12. #27
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    Call it what you like. It's a fact I'm down a lot of horsepower on a couple of the bikes out there. Yes I can find more speed round the track, Fish has proven that. I only came on here asking for how to modify my engine. No offense mate, I wasn't asking for riding tips in this thread but cheers.

  13. #28
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    Quote Originally Posted by Pumba View Post
    That may have less to do with outright horse power than you may think. Carrying a little more corner speed will result in carrying more speed down the straight which will give the appearance of more HP.
    Righto,

    To all the out of towners reading this:
    Yes, normally more power isn't the answer. Yes Normally riding skills and handling count for heaps more.

    This ain't a normal situation, Hamish is fast as fuck on Kaitoke, He could probably get a bit faster as rider, maybe, but power WILL improve his situation.
    Heinz Varieties

  14. #29
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    Quote Originally Posted by koba View Post
    Righto,

    Yes, normally more power isn't the answer. Yes Normally riding skills and handling count for heaps more.
    Malcom are you mental? Hang on, don't answer that. Power is everything. This is Road RACING. Not Trials. Even more important its bucket racing on a short track. Power is even more important. Wash out your mouth. There is nothing wrong with the quest for more power. But I will not mention another thing to Hamish coz I don't want him to beat me.

  15. #30
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    Quote Originally Posted by richban View Post
    Malcom are you mental? Hang on, don't answer that. Power is everything. This is Road RACING. Not Trials. Even more important its bucket racing on a short track. Power is even more important. Wash out your mouth. There is nothing wrong with the quest for more power. But I will not mention another thing to Hamish coz I don't want him to beat me.
    My bike goes fine with it's lack of power, just look at the results I get on it...

    Oh, as you were.
    Heinz Varieties

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