Dwyer!
The 162.5 jet is the proper jet. Your owners manual and even the early edition service manuals call for the 155 main jet. (Your dealer probably has the early edition as my dealer did). The later edition service manuals specify the 162.5 jet. I use the 165 main in mine year round and it runs a lot better than when I had the 162.5 in it. The only change I make is I use the K&N air filter in the warmer months and switch back to the stock air filter in the colder months as they tend to run leaner in the colder months. The manual actually calls for the 167.5 in the colder months at my altitude. You don't say where your from so I don't know what altitude your at. Your dealer is probably on the right track as you can have a backfire condition when running lean. Here are the jetting specs. from the newer service manuals.
( 0 - 6000 feet ) Below 40 Degrees F. = 167.5 main jet
( 0 - 6000 feet ) + 40 Degrees and above = 162.5 main jet
( Above 6000 feet ) Below 40 Degrees F. = 160 main jet
( Above 6000 feet ) + 40 Degrees F and above = 155 main jet
I didn't mean for this post to be so long and I hope I'm not confusing you too much. Tell your dealer to get the later edition service manual as their are a couple of changes from the early editions, or better yet, print this post and give it to him.

 

Hey- calm down Dwyer-the end of the world isn't comin here now- settle down- just go to your local Honda dealer and you'll feel much much better...[img]i/expressions/face-icon-small-smile.gif[/img]

 

No let's ride for the pure pleasure of you seeing the back end of my Rincon sir- you have good intentions- but Polaris will not do the job--sorry pal--[img]i/expressions/face-icon-small-smile.gif[/img]

 

Sup--TIMMMMMAY here- and actually-I have a full garage of ATV's of all good quality-because none of them are Polaris--check it out:

2003 Honda Rincon
2002 Yamaha Grizzly
2001 Yamaha Raptor
2003 Suzuki Z-400
2003 Honda 400EX
2003 Bombardier Outlander 400
2003 Honda Rubicon 500

 

Well--Polaris does suck--and the Honda trans. is the most advanced to date bud-so just calm down-and treat yourself to a trip to your local Honda dealer-you'll feel much better...[img]i/expressions/face-icon-small-smile.gif[/img] -and the Rincon will smoke the Sportswoman 700 in a drag race-on the track- anything you name it son- the Polarass doesn't have a chance against the Rincon- Honda is still number one for your information... have a nice day

 

The Rincon will waste the Sportswoman in a drag race or on the track son

 

Your dream is to race me lookin at the back of my Rincon son- and you'll see the big HONDA on the back son- put your Sportswoman back in the garage

 

Timmmay;
You are perfectly entitled to your opinions, but all you are doing is trying to stir the pot!
Mellow out, and you will realize all the helpful info that is available to you on this forum.

 

It's actually kind of entertaining when a jerk brain like this shows up on the forum. It is obvious he has never been closer to any atv than looking at the pictures in the atv magazines on the shelf at Walmart.

 

If timmmmmay has 6, 4 wheelers when does he have time type let alone ride? shouldn't he have 6 m's instead of 5 ?