In the course of getting my 1st service on my Rincon the service rep recommended rejetting from the stock #152 (sea level) to #145. I'm at 8300' and ride between there and 10,000'. Should the new jet be about right- I sure hope it's not too lean?

 

Look in the service manual. It will recommend a jet for above 5,000' (if it is like the other Hondas). If it is a 145, you're more than safe (maybe to safe!). Or, maybe your dealer is sharper than you think, and that is the appropriate jet for 8,300'??????

 

during our trip to colorado i had to run a 140 main jet,next year i will run a 137.5,we stayed at 9000 ft and rode up to 14000 it was just a little to rich even with the 140..ride it and do some plug checks you will probably find out the same thing...its all about trial and error but always error to the rich side..

 

Hi y'all I'm back. The large temperature difference between winter and summer would make a difference too. You would want richer jets in colder weather. Anyway, being a large, mildly tuned four stroke, the jetting isn't as crucial as it would be on say, a 400ex, or two stroke engine. Having been a tech for 15 years full time, I've worked on hundreds of carbs on various machines, and I can't think of ANY machine with a dyno jet kit installed that I thought ran really good and crisp. Besides, their slide needles are so soft they actually wear out, and the tuning changes with time. If it was me, I would do it with main jets and mixture screw\idle speed adjustment and leave the stock needle in place. There is no substitute for trial and error either.

 

Actually 3TV, I have jetted a few Rincons for mountain riding and the reports I got was they worked well. But I do know there is a lot more money to be made selling a kit than just buying the proper jets and installing them, and I'm VERY skeptical of any dealership who insists you need to buy a dyno jet kit to make your machine run right. In my experience, the Rincon carburates very well at sea level, especially taking into account the variety of temps they may be run at. Traditionally, Honda's main jetting is on the rich side, and their slow jetting is on the lean side. I haven't messed with a Dyno Jet kit in the mountains on a Rincon, and maybe they work good, but the play-dough quality of their parts would be enough to make me look for an alternative.

 

I have done nothing to my Rincon. Is it fair to assume that I really don't need to do anything to go to ride in Idaho for few days. I don't think there is an extreme elevation change. I'm just learning about all this stuff.