Joined
·
453 Posts
Keihin has the FCR series carbs in 39 and 41mm sizes
Mikuni has the HSR series in 42,45,48mm sizes.
Both of theses designs are high flow racing style carbs, no throttle plates or vacuum operated slides. The slide is directly operated from the throttle lever. They also have adjustable accelerator pumps. There is no throttle plate or shaft in the carb bore to restrict and disrupt air flow into the motor.
Many Honda riders are using the FCR's on their modified 400EX's with good results. There also was a mag article a while back that did a shootout with several carbs on a 440EX, the 41FCR took top honors in the article.
DS650 riders are using the HSR carbs with satisfying results. The Predator stock carb is the same as the DS stock carb. Research will yield you more info on these choices
Mikuni has the HSR series in 42,45,48mm sizes.
Both of theses designs are high flow racing style carbs, no throttle plates or vacuum operated slides. The slide is directly operated from the throttle lever. They also have adjustable accelerator pumps. There is no throttle plate or shaft in the carb bore to restrict and disrupt air flow into the motor.
Many Honda riders are using the FCR's on their modified 400EX's with good results. There also was a mag article a while back that did a shootout with several carbs on a 440EX, the 41FCR took top honors in the article.
DS650 riders are using the HSR carbs with satisfying results. The Predator stock carb is the same as the DS stock carb. Research will yield you more info on these choices