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Clutch suggestions

Discussion in 'XJ Modifications' started by 83xjturbo, Jun 4, 2009.

  1. 83xjturbo

    83xjturbo New Member

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    Im having a problem with clutch slippage on my xj650lk. i have no idea what the HP of the bike is, however, the mods are as follows:

    tc03-6a turbo
    ported 650 head with 900 valves
    custom ground cams (i dont recall the numbers, but the duration is roughly the same as stock, with slightly more lift. similar to the seca 750 cams)
    boost is set at 15-16 psi

    my problem is this, under normal driving, it is perfect, excellent throw, engagement, holding power, etc, even under boost. when i get in it hard however and start yanking gears without the clutch (ie, shifting under full boost) after every shift it slips up a few thousand rpms and then grabs again. thus far ive tried new stock replacement fibers, steels, and springs, and shimming the springs with washers. im concerned about shimming them anymore and causing problems with the clutch not having enough travel, so im wondering if anybody has any leads on stiffer springs, maybe a certain set of valve springs that has a heavier spring rate but fits the clutch pack. any help is appreciated.
     
    83xjturbo, Jun 4, 2009
    #1

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