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V50 aluminium tapered bearing steering cups

Discussion in 'Small Block' started by curci, Feb 15, 2019.

  1. curci

    curci Just got it firing!

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    Hi,

    I am in process of converting my steering from loose ball bearing into tapered bearing (was very notchy). In process I relived that I have to make steering cups where races of 30205 bearing will be inserted.

    1. What is your opinion of aluminium as material instead of steel. Gentleman who will make them for me his opinion is that aluminium will handle stress without problem. Opinion well apreciated.

    2. In order to retain original head stem 240mm i would have to use only lock nut without adjusting nut bellow (KTM have same set-up with only lock nut). What is your opinion/reservation in this set-up.

    Br

    Uros
     
  2. GuzziMoto

    GuzziMoto GT Reference GT Contributor

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    Since I believe you are using the aluminum to insert the steel bearing race into I think that sounds OK. I take it you can't find tapered bearings that are the right size?
    For the stem nut, while I think that will work I would rather use something that will lock better. I have seen some that use a nut that clamps down on the threads to lock it. Or two nuts that are half thick.
    While I would not consider either of the two solutions you have as ideal, I also don't think either solution is unworkable.
    Good luck,
     
  3. curci

    curci Just got it firing!

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    Hi Guzzimoto,

    Thank you for your prompt reply really appreciated. I think that best solution would be that i shim adjusting nut to 5mm and locking nut -5mm. By this I will have at least 10mm of thread for locking nut to be in place and it will be more secure. All tapered bearing with ID 25mm is at least 15mm high so quite higher than original setup. Stein- Dinse offers tapered bearing kit only for lower side bearing while retaining original setup (loose balls) on upper side. What is your opinion of conversion from loose balls to tapered bearing?

    Br

    Uros
     
  4. GuzziMoto

    GuzziMoto GT Reference GT Contributor

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    I have converted a few bikes back in the day, and I like the results. Tapered bearings, as long as they are properly preloaded / tightened, are smoother than ball bearings seem to be. It might be all in my head but I felt like the steering was better with the tapered bearings.
    I currently have an 87 Lario, I wonder what it has. I figure ball bearings are stock, but I am the second owner and the first owner spent a fair bit of money on upgrades to it (no more points, electronic ignition for example). So it may have had new bearings installed.
    I will be curious to hear how it goes for you.
     
  5. curci

    curci Just got it firing!

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    I will do that. I have Dyna waiting to be installed before season. Otherwise is just love my Monza believe or not I like taking her out more than Ducati SS. It is just so nimble and fun.

    Br

    Uros
     
  6. GuzziMoto

    GuzziMoto GT Reference GT Contributor

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    Yes, I agree. The Lario has a fun, nimble, feel that makes it a lot of fun to ride. I de-linked the brakes, and that improved braking feel for me. I think linked brakes are good for some people but I am an old racer guy and like my brakes separated.
    I wish it had 17" wheels, but mainly because it is getting hard to find good 16" tires in the right sizes.
     

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