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Discussion Starter #1
Hi guys. New to the forum so sorry if this has been covered a million times before, I am currently fitting a fcr 41 flat side to my 2006 lc4 640 prestige. I have had the carb professionally re built and re jetted. Is I have the correct rubber to mount to the air box. Is there any other parts I need to change to fit this. Also does any one know what sort of power gains I can expect from this mod? Bike is currently fitted with full akro exhaust system and power parts air box mod
Thanks
Rich
 

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hi.
expect about 50~55bhp at the wheel as-is (my duke 620 had 48 at the wheel bog-standard). with the fcr there are claims as much as 65bhp at the wheel, I would expect it more towards 55~60bhp.
apart from that it apparently makes the engine run smoother.
 

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Thanks for that. I’ll look forward to getting it all built back up and out for a ride
 
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