Hi im new to re-jetting and im wondering what jets to buy for my 400ex? I live in wisconsin and i have a slip on fmf pipe and run a uni filter without the lid.

What cam should I use for the most power out come In the midrange and top with some decnt gas mileage on the trails

I have been reading up on this as the machine (2016) is limited to 75kms/hr (46m/hr). Nothing new here, but no one hascome up with a cheap resistor type mod to get around this that i could find. Honda Rubicon 500 EFI MAGNUM REVOLUTION-PRO ATV Speed / REV Limiter CDI Box
This is the only mod i could find, & you have to disassemble the CDI. I cant see me doing that to a 2 week old machine. Now you may say why do i need the extra speed? 1) cause its there if you free it up, 2) I paid good $$ for the machine so its my prerogative if i so choose -_-
Anyway, i may come up with some sort of inline resistor for speedo gear line the once the warranty is off, if i do i will post up the results…. until then, anyone have any ideas?
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ok I just bought another 400ex and this has me stumped? the guy I bought it off of said there was a recent top end done. didn’t say much else about it? but heres the problem the quad only smoke here and there? very little on start up but when its warmed up it will smoke out of nowhere? its blue! I put new valve seals in it thinking it was that? but still doing it? do you think it might be a head not torqued down right? no smoke on wot either so I know its not rings? WTH is going on? any help would be great? the quad runs, starts and idles great?

Hi. I am trying to buy a snorkel kit for my atv but not sure which one will give me the best performance/not ruin my quad…..engineered properly!

Is there a good snorkel system out there for my situation?

I have a hmf performance slip on, hmf optimizer, so I am ready. Any suggestions? Should I build my own? 2" intake or bigger?

Can I buy a system that will help my bike perform better than it does? If so, any recommendations out there?

Looking to see what’s out there, can’t really find much online, but I know people that have them. I only need about a 12% or even a 34% but I don’t know where to look or how much they cost. Love to see what y’all know!

My wife’s machine is a ’07 Recon. This engine really "woke-up" when I installed a Uni-filter & rejetted the carb. Now on with the quest for more power(insert Tim Taylor grunt here).
I am considering modding the exhaust next. Would there be anything to gain by installing a stock system from a 250ex?

My wife’s machine is a ’07 Recon. This engine really "woke-up" when I installed a Uni-filter & rejetted the carb. Now on with the quest for more power(insert Tim Taylor grunt here).
I am considering modding the exhaust next. Would there be anything to gain by installing a stock system from a 250ex?

I see that hmf and other companies are selling MUFFLER snorkels as add on accessories….is this completely necessary or just the basic kit will do me fine (intake)? Anyone have any input?:icon_ ban:

I have a 14′ TRX250X, which one would be best?

New: http://www.ziptyracing.com/fuel-mixt…hin-fcr-carbs/
Old: http://www.ziptyracing.com/fuel-mixt…hin-fcr-carbs/

I know it is new but Honda doesn’t change a whole lot, lol