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  1. #1
    Yellow93's Avatar
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    Lightening the Clutch idler gear

    I am thinking about having R&D lighten and balance a new style (57 tooth) clutch idler for me before I put in a new clutch. Has anyone done this and what were your results and impressions? Any thoughts as to whether this is a good idea or not would be appreciated as well.


  2. #2
    fx160's Avatar
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    realisticly it's on the wrong side of the clutch to make any difference
    the clutch action is between the clutch assembly and supercharger
    not the idler gear and crank shaft

  3. #3
    robbiestar's Avatar
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    fx u know i respect u heaps but i have to disagree with u on this one , and ive harped on this subject a few times now and read about all the failures and done the research on the ins and outs of this system , lightening the intermedate wheel puts alot less stress on the clutch , you have to remember that this gear runs at and up to 80,000 rpm and spun at that speed the g forces and centrifugal forces are massive , the heavier it is the longer it takes to slow down witch means when wot at 8000rpm then back to idle the gear is still spining at say 50,000 rpm then straight back on the throtle gives the clutch time without preload then bang it hits the gear hard once rpm has caught up,, plus take the the riva dampener for example at idle then straight to wide open throtle the force is alot grater to get that gear up to speed because of more weight ,, plus how many have falled 2008-2009-2010-2011 clutches or gears because of lightening and how many fail straight away when riva dampener is installed , most is blamed on the clutch but its not its because of the weight of the intermedate gear ,,,but thats just my opinion i know that the spag clutch is not a very reliable part but the wearing out of thos things is another thing but this dose not help i mainy talking about the breakages , gears teath
    Quote Originally Posted by fx160 View Post
    realisticly it's on the wrong side of the clutch to make any difference
    the clutch action is between the clutch assembly and supercharger
    not the idler gear and crank shaft

  4. #4
    fx160's Avatar
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    Lightening the Clutch idler gear

    I know what your saying Robbie
    But the idle gear is not spinning that fast it is the super charger shaft spinning that fast
    The reason there is not a lot of failures talked about is its not a common mod
    Once clutches kept blowing R & D started looking for another solution
    The clutches on the sharft solution also fails if used in rough water
    It seams the best fix so far is a 2013 clutch and idler gear
    That is what most of the race teams run
    But they still blow when used with high boost
    I have a riva damper in my ski and still haven't blown a clutch
    The only reason I don't recommend one is riva were not interested in warrenting a broken one
    So for the price of a dampner you can pay for 2 more clutches

  5. #5
    robbiestar's Avatar
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    ok the clutches were no good in the early ones i dont dispute that ,,ok how many std setups broke teath off , and im shaw the clutches got more than 10hrs unlike some that have had the dampener put in ,,any way there is enough evidence on this forum alone, if you read the hole lot, to inform anyone with common sence the better parth to take .

  6. #6
    MattSA's Avatar
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    Not good to hear Riva dont warranty the dampener, piss weak if they dont stand by their product. Surely the item has to carry a warranty ? or do they blame alignment and other issues

  7. #7
    gordon lasiter #328's Avatar
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    Quote Originally Posted by Yellow93 View Post
    I am thinking about having R&D lighten and balance a new style (57 tooth) clutch idler for me before I put in a new clutch. Has anyone done this and what were your results and impressions? Any thoughts as to whether this is a good idea or not would be appreciated as well.
    I had mine lightened and balanced 2 years ago and have not blown a clutch since then. ran with a C5 wheel and a ET LB.
    I also have the R&D billet coupler.

  8. #8
    FZS Monty's Avatar
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    Quote Originally Posted by gordon lasiter #328 View Post
    Quote Originally Posted by Yellow93 View Post
    I am thinking about having R&D lighten and balance a new style (57 tooth) clutch idler for me before I put in a new clutch. Has anyone done this and what were your results and impressions? Any thoughts as to whether this is a good idea or not would be appreciated as well.
    I had mine lightened and balanced 2 years ago and have not blown a clutch since then. ran with a C5 wheel and a ET LB.
    I also have the R&D billet coupler.
    That's good to hear, how many hours and style of riding Gordon?

  9. #9
    JD 1's Avatar
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    this is a mod i do on all my customers builds. Never saw a massive power gain but have heard and felt the difference is how smooth it makes the SC run. This mod will cut your SC/clutch failure chance by alot.

    here is a pic of what I have done.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  10. #10
    Yellow93's Avatar
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    Dan have you done this with the 2013 idler or just the older style? I just wonder if its a) necessary due to the fact that it already weighs about 7 grams less than the old style one does AFTER getting lightened, and b) whether its a good idea since the new style is already lighter and thinner. I wonder if further lightening would compromise the integrity of the piece.

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