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What is everyone using for a replacement rear master cylinder for the 400s. Are there any replacements available or one from another model that can be modified. I tried a rebuild kit but the casting is pitted and it is leaking.
Thanks

1976 RD 400 My right cylinder is running lean. I have done a leak down test that looks good. Swapped coils from side to side. It is stock except for UNI foam filter and boyeseen power reeds. I currently have 140 main in left carb with needle in middle position and a 145 Main in the right Carb with needle moved down one position. Compression test shows about 2-3 psi difference in cylinders. And temp check with IR gun shows about 25 degrees hotter on right cylinder also. Any ideas on something else to check for I am running out of ideas. Bike runs good just lean on right cylinder.
Thank.

Did a leak down on my RD 400c because my right plug was showing a lean condition and found its leaking around my plug like the crush washer isnt sealing. I tried another plug and its doing the same thing. Anyone else run into this before and are there any ways to seal this ?
Thanks

Is anyone familiar with this exhaust? Is there a performance gain over the stock exhaust? How does it compare to the race exhaust from JL? Not much info on the site other than it fits with stock pegs and stands.
Thanks