i want around 35-40hp

[triplejay30349]

ok. i am considering buying a 400ex b/c i can get it pretty decently priced. before i purchase it im wondering if mods can be done to get around 35-40hp without biig bore or stroking?

[2004exrider]

Well if you dont wanna change the piston you can always put in a camshaft (hotcams stage 1 preferably), K&N/Uni filter, a good exhaust full or slip on HMF, White Brothers, Curtis Sparks, and a Curtis Sparks advanced timing key that will advance the timing another 6 degrees. The stock 400ex has 28HP so my guess is that you should gaine another 5HP or so? You can always put a 14 tooth sprocket upfront to make it get up to speed a little quicker.

Jimmy

[DieselBoy]

Personally if your on the search for alot of power, I would just invest in a YFZ450, TRX450, or LTR450 and save yourself the headache.

[400exrules]

what they said, but get a rod and like a 12:1 piston, or maybe higher

port and polish will help too.....maybe a carb also

[triplejay30349]

yea, i think imma pick up a leftover '05 450r on tuesday. i was just thinking because i can get a 400ex for $2500-3000 and put about $700-1000 in it and get stock 450r hp and save $1000-1500. oh well i guess imma be a r rider soon. i'll try to post pics this week:D

[Halter]

ahha...your 450r wont be stock for soon trust me..u will want a pipe...then some others..lol its a fun sport u will love it man!!

[DieselBoy]

The way I see it if you can buy a 450 high performance and have a fast machine to start with your far better off than dumping a couple grand into a 400ex, and sacrafice reliability. Just my opinion, though.