Yes. Downdraught carbies won't work properly if they're not mounted on the right angle. That's why they're downdraught. A few degrees either way can be compensated for by altering the float height, but once you start to go 45° or so from their design attitude, you'll have problems.Hessian said:It says that a Zephyr 750 (close enough to mine) should use a horizontal 35mm. The ones on auction are downdraught 39mm
Will this have a huge impact to the point of being unusable?