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Thread: Straight rate fork springs

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    Default Straight rate fork springs

    Rebuilding my forks next week and want to put in new springs. I know progressives seem to be a favorite here but they just arent for me.

    Can anybody share their weight and what straight rate springs that worked?

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    Default Re: Straight rate fork springs

    And can anyone confirm I'd the road star and road star venture use the same fork springs?

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    Default Re: Straight rate fork springs

    Quote Originally Posted by B.E. Coyote View Post
    And can anyone confirm I'd the road star and road star venture use the same fork springs?
    2006 Roadstar Silverado spring 4WM-23141-00-00
    2006 Royal Star Venture spring 4XY-23141-00-00

    The part numbers are similar but a Yamaha Parts Expert will have to tell us if they are the same. Maybe somebody will chirp in.

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    Default Re: Straight rate fork springs

    Thanks.

    I was wondering if the very similar parts numbers were for different rates.

    Neither the sonic or race tech sites are very clear.

    Yamaha didn't do anybody any favors with naming a 2nd different bike "venture" and having it part of another line of "road stars"

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    Default Re: Straight rate fork springs

    I recommend the Sonic Springs. They do have an application specifically for our bikes. I put them in the '99 that I had and think that they are much better than Progressives.

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    Default Re: Straight rate fork springs

    Quote Originally Posted by Du-Rron View Post
    2006 Roadstar Silverado spring 4WM-23141-00-00
    2006 Royal Star Venture spring 4XY-23141-00-00

    The part numbers are similar but a Yamaha Parts Expert will have to tell us if they are the same. Maybe somebody will chirp in.
    Working backwards on part numbers:

    00-00 = revision and color numbers
    23141 = means it's a fork spring
    4WM/4XY = first model it was used in.

    Every Yamaha fork spring will have 23141 in that second field.

    1989 Venture Royale
    1982 XJ650 (Sold)
    www.thundervalleypower.com

  7. Thanks videoarizona gave thanks for this post
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    Default Re: Straight rate fork springs

    Ordered the Sonics.

    Never heard back from their customer service,
    But the progressive site lists the same spring for the Royal Star and Royal Star Venture.

    Used that to go ahead with the Sonic order.

    New springs, seals, dust seals, bushings etc.

    1999 with 91,000 miles. Doubt that it has ever been changed.

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    Default Re: Straight rate fork springs

    You really should try to contact their customer service. The thing that sold me on Sonic is exactly what you are saying. Progressive sells the same spring for the Venture and the Royal Star. The Venture, due to the fairing and etc., needs a slightly heavier spring and Sonic has one that specifically works for the RSV. I tried to find my order information but it seems to be gone.

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    Default Re: Straight rate fork springs

    They do have 3 choices in spring rates and I used their online calculator to choose. Their calculator is based on the total weight of the bike plus rider weight.

    Hate that there is no phone number on their website, just one of those web based "contact us" email forms.

    Sent an email last night and this morning. No reply so far.

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    Default Re: Straight rate fork springs

    You should be OK then. One word of warning. Unless they have changed it, they used to not send enough PVC tubing that you add to the top of the springs. The springs are shorter than stock and you use the PVC pipe for spacers. For some reason, they didn't send enough when I did mine and Rick Butler ran into the same issue. We contacted them to let them know but I can't say if they ever changed it or not. It's no big deal, I had plenty of it laying around. Don't remember what size it was but it it was 3/4" or 1" I think.....regular schedule 40 PVC pipe.

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    Default Re: Straight rate fork springs

    I am running the Sonic 1.2 springs and they were a great choice. I also went to 15 weight fork oil at the same time. The ride is a little bit stiffer but not harsh and the bike handles the twisties much better now, no more feeling of understeering and tracks through the curves exactly where I want it to go.

    Sent from my SM-N920V using Tapatalk
    Last edited by ragtop69gs; 01-07-2018 at 09:32 AM.
    Jay
    Patriot Guard Rider #18267
    '01 RSV......08 Hannigan RSV, 69' Buick GS 400 Conv.
    " Never ride faster than your angel can fly"

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    Default Re: Straight rate fork springs

    Guys,

    For all of the 2nd gen Ventures, you use the 1.2 kg/mm spring rate in a Sonic. Since the RSTDs don't have that heavy fairing, you can probably get by with a 1.1 spring rate.

    Rick

    Quote Originally Posted by ragtop69gs View Post
    I am running the Sonic 2.2 springs and they were a great choice. I also went to 15 weight fork oil at the same time. The ride is a little bit stiffer but not harsh and the bike handles the twisties much better now, no more feeling of understeering and tracks through the curves exactly where I want it to go.

    Sent from my SM-N920V using Tapatalk
    The best you have ever ridden is the best you will ever know....Paul Thede

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    Default Re: Straight rate fork springs

    Quote Originally Posted by Freebird View Post
    You should be OK then. One word of warning. Unless they have changed it, they used to not send enough PVC tubing that you add to the top of the springs. The springs are shorter than stock and you use the PVC pipe for spacers. For some reason, they didn't send enough when I did mine and Rick Butler ran into the same issue. We contacted them to let them know but I can't say if they ever changed it or not. It's no big deal, I had plenty of it laying around. Don't remember what size it was but it it was 3/4" or 1" I think.....regular schedule 40 PVC pipe.
    When I did my forks 2 years ago Sonic was still sending the springs with not enough spacer, I used thick wall PVC well pipe. I didnt trust the standard thin wall PVC you find at the big box stores.

    Thanks RickButler for your suggestions and guidance when I undertook my fork rebuild, I am totally happy with the results.

    Sent from my SM-N920V using Tapatalk
    Jay
    Patriot Guard Rider #18267
    '01 RSV......08 Hannigan RSV, 69' Buick GS 400 Conv.
    " Never ride faster than your angel can fly"

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    Default Re: Straight rate fork springs

    They still do not send enough pvc.
    Brian

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    Default Re: Straight rate fork springs

    How do you know what length the PVC spacers should be.

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