does any one have the big bore kit for there honda 400ex if so do u have any problems out of the kit does it have any down sides if u have any info on this please let me know thanks!!!![img]i/expressions/face-icon-small-happy.gif[/img]

 

is there a biger kit u can but for this atv i have a stock 02 400ex and im thinking of buying this kit is it worth the money

 

Just make sure you keep your oil changed often beacuse theres a lot more heat.If your going to do that get a cam and some good valves while your at it.

My extra 440 motor is getting redone now and im getting it stroked im not sure what the size is going to exactly. but it sould run well.

 

I went with a 426 kit in my 400ex, It has larger intake valves, 3 angle valve job, porting and polishing, xr400 cam, 11:1 high compression piston all for about $900. I ride the hell out of that bike and it holds up like-- champ. PRO FAB ATV out of Lancaster, Ohio. the #

 

the # is 740-654-0734, that price included all machine work. It was in the ball park of $900

 

Thats about what my 440 cost with about the same stuff but i also got new valve guides stainless valves, and hardend rockers and springs and so on.

 

where would i get a cam,valves and valve spings and hardend rockers. is there a web site or magazine i can order out of. thanks for any help

HAVE A NICE DAY [img]i/expressions/face-icon-small-smile.gif[/img]

 

Outlaw ATV in New Jersey built some of the fastest 440's I ever seen. They run with modded banshees, smoke stockers. They seem to be very reliable also. My friend has one done by them and it absolutly rips. Best advice is dont cheap out get all the needed parts its will only cost you in the long run.

 

You can get most of the stuff from white brothers, web cam,and LA sleeve. I dont know what there phone numbers are but they have ads in dirt wheels.

 

yeah, scott at pro fab is a good guy, does good work....he did my port work, I highly recommend him.....I also suggest throwing that piece of crap ex motor away, and getting a water cooled yzf motor to run hard.....