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View Full Version : 39mm or 40mm FCR


Waynes400ex
09-13-2003, 12:24 AM
Which is better for 400ex ? the crf carb our the yzf ? Why ?
Giz400ex
09-13-2003, 11:44 AM
Is your 400 stock? and I had the impression the there was only a 39 or 41:confused: I know the YZF is 39 and the CRF is 42.
stupid driver
09-13-2003, 02:07 PM
i think he is talkin about the 40mm off of the bike. As for me, i love my 39mm, but if you can save a few buks and get the results, get the 40mm. Idk if it has the same performance though. Maybe someone can bak me up on this?
Waynes400ex
09-13-2003, 05:11 PM
Yes I'm talking about the carb from the dirt bike servicehonda.com has it for $338 when a fcr is going for around 500 . I was just wondering what are the main differences and what all has to been done to convert it to fit and 400ex and use a thumb throttle. Does it peform better than the 39fcr used on the yzf our does it peform worse?
Chanman420q
09-13-2003, 07:55 PM
which bike? the 650?
Waynes400ex
09-13-2003, 08:51 PM
no the 40mm fcr comes off the honda crf 450
Chanman420q
09-13-2003, 09:42 PM
dont u have to get a special cable?
Waynes400ex
09-13-2003, 09:50 PM
Thats what i'am trying to find out. I have heard someone tell me about using a honda rancher cable????
Juggalo
09-13-2003, 10:53 PM
yeah i'm pretty sure its the rancher cable your sposed to use with the 40mm.
Waynes400ex
09-14-2003, 01:59 AM
Is one of the carbs better than one another?
400EXIAN
09-14-2003, 01:42 PM
What if you use a twist grip does that make it any easier?