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B50MX Front Suspension

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So my b50mx has stock front suspension, but with heavier springs. Right now i have the stock 30wt oil in the called for amount in the forks. Either the rebound is too slow or the suspension is too soft. So I am trying to figure out whether to put more oil in, or spacers, or lighter oil, or heavier oil. Not sure what to do. Any suggestions?

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On my '76 TT500, I was suffering horrible bottoming and head shake on braking bumps at the end of faster straights. Landing jumps and G-outs I could get the front to bottom from time to time, but it didn't upset the bike much and it wasn't a big deal. I tried raising the fork oil level some, that didn't work. So, I went to a lighter weight oil to reduce rebound damping and it improved significantly. I went from a 15w to a 7w fork oil.

So apparently my forks were packing down terribly. If you have similar symptoms you might consider reducing the fork oil weight. I have no idea what the older forks like to use, but 30w sounds to be pretty heavy.

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In the owners manual, service manual, and The Rupert Ratio unit single engine manual, it calls for different brands of atf. When I wanted to go on the heavy side I used 7 1/2 weight fork oil. Which was fairly stiff.

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On my '76 TT500, I was suffering horrible bottoming and head shake on braking bumps at the end of faster straights. Landing jumps and G-outs I could get the front to bottom from time to time, but it didn't upset the bike much and it wasn't a big deal. I tried raising the fork oil level some, that didn't work. So, I went to a lighter weight oil to reduce rebound damping and it improved significantly. I went from a 15w to a 7w fork oil.

So apparently my forks were packing down terribly. If you have similar symptoms you might consider reducing the fork oil weight. I have no idea what the older forks like to use, but 30w sounds to be pretty heavy.

I will try going lighter. Thanks for the input.

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