Vintage Dirt Bike Q & A

Looking to replace the stock 24mm carb with a 26mm mikuni round slide vm series carb. Any other carbs out there that would be a better swap? Any input would be greatly appreciated. And tips on jetting a mikuni for a mt125? Thanks

If you're still using the oil injection, I'd suggest a '75 CR125M 28mm carb and manifold, which should just bolt right on (although the cylinder intake should be matched to the manifold), and the OEM jetting should be reasonably close to start with. You might have to tweak or remove the carb's cable adjuster to get the cable to fit and pull the slide up the entire 28mm at WOT. The Mikuni VM may work too, I don't know.

Ray

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'74 CR125M (175cc), '75 MR175, '82 RM250Z, '08 YZ250F, '14 Zero FX electric, '14 Zero MX electric, '18 Alta MXR electric