hello i just bought a new 2008 trx450er and it runs amazing but sometimes when i stab the throttle quickly from an idle it dies. is this a problem or is it just because the motor is still being broke in?

 

They have to jet these lean, to meet emissions standards. Break it in completely, then do any mods you might be thinking of (exhaust, air intake, etc.), and get it properly jetted. The Honda HRC kit is the greatest bang for your buck!!!

I don't know how familiar you are with this engine, but it needs frequent oil changes (as do all the 450's!). This is becasue of fuel dilution of the oil. Fortunately, Honda seperated the engine and trans oils, so you don't need to change out the trans as often as the engine. This article outline this:

http://www.belray.com/scripts/future...1-64a4cf6d0144

Also, run about 100cc of extra oil in the trans. 3rd a 5th gears are lubed by splash, and extra oil helps insure that they will never get left high and dry!

Do not neglect your first valve adjustment, at 20 hours!

Also, break it in on petroleum oil (~10 hours), but after that this engine deserves a premium ester synthetic! My favorites are Redline, and Maxima Extra, Ultra, and 530MX.

I posted some links about oil in this thread, that are really imformative:

http://forums.atvconnection.com/showthread.php?t=310291

 

great info as usual thoughts on a lower front sprocket maybe or thoughts on an accelerator pump cover such as BOYESEN or the alternatives thoughts? I sometimes go through the same on my 07 when running low speed

 

yeah, i got a 05 450 and it sometimes happens too. I was thinking about a dyna programmable ignition.

 

all I know is to go with dyno maybe some others are now legit ? what thoughts on the above? sprocket i heard if you put a pump cover you need to rejett well im rejetted now plus so what? ...........sorry I had a few beers