Mile high to sea level - please help with jet issue.

DeeDee · Post by **DeeDee** » Thu Aug 04, 2016 8:36 pm

A friend of mine is spending 4 months in San Diego. She has a 2014 Buddy 125 that is currently jetted for Denver, 5200 feet. She is bringing her buddy with her. I'm looking for advice from those who know. Does the carb need re-jetted once she gets to sea level? Both idle and main jets?

Can the air filter possibly be restricted once in California to compensate for the lean condition leaving the current jets in place?

Thank you in advance.

DD

k1dude · Post by **k1dude** » Fri Aug 05, 2016 8:04 am

I've ridden my stock Buddy 125 from sea level to 8,000 feet without any problems. I didn't notice any differences. But, YMMV.

Mr Stiffy · Post by **Mr Stiffy** » Sat Aug 06, 2016 1:52 am

It's ine thing to ride a stock setup a mile high, just runs a little rich and sluggish.
If it's been jetted for high altitude, then it will run lean at sea level which can be damaging if run for too long.
What were the jets changed to?
Still stock airbox and exhaust?

DeeDee · Post by **DeeDee** » Sat Aug 06, 2016 3:48 am

Thanks Mr Stiffy. Stock air box and exhaust. Nothing has been changed since purchased new. I don't know what jets are currently in it, but it is what Genuine provides to the Denver dealer.

Dooglas · Post by **Dooglas** » Sat Aug 06, 2016 5:51 pm

I would be surprised if Genuine rejets the scooters. The ones I have seen delivered to a dealer look like they have not been unpacked from the original shipping crate. You might start by asking the Denver dealer if he rejets the scooters before delivery. If the scooter does have smaller jets, it would be easy for your friend to take her scooter to Motorsport in San Diego and have it rejetted for sea level. Remind her to be sure and save the other set of jets.

babblefish · Post by **babblefish** » Sat Aug 06, 2016 6:33 pm

The stock main jet as specified in the service manual is #102. Other than adjusting the idle mixture screw, this is the only jet that needs changing, if required. One could aways do some plug chops to determine if a rejet is necessary. That being said, my Blur 150 came with a #92 when I bought it. Not sure why it had such a small main jet, but I remember the engine running quite hot all the time. I'm currently running a #118, but my engine is no longer stock. BTW, PGO specifies the same main jet size for both 125cc and 150cc engines, if that's of any interest.

Also, I would not restrict the air filter flow as a temp fix as all that will do is make for a sluggish riding scooter with a limited top end. Kind of like giving coffee to a drunk, you just end up with a wide awake drunk...or some thing like that...

DeeDee · Post by **DeeDee** » Sat Aug 06, 2016 9:08 pm

Thanks everyone for the info. Ryan at ootys scooters in Santa Barbara says it will be fine to run at sea level with the stock jets.

babblefish · Post by **babblefish** » Sat Aug 06, 2016 10:02 pm

DeeDee wrote:Thanks everyone for the info. Ryan at ootys scooters in Santa Barbara says it will be fine to run at sea level with the stock jets.

This is assuming your friends scoot still has the stock jet...

Dooglas · Post by **Dooglas** » Sat Aug 06, 2016 11:25 pm

babblefish wrote:This is assuming your friends scoot still has the stock jet...

Exactly. Wasn't that the whole question - whether the scooter was rejetted for high elevation?

DeeDee · Post by **DeeDee** » Sun Aug 07, 2016 3:35 am

Jets are what were in the bike when bought new from the dealer. I guess I wrongly assumed that the carb would be set up different new depending on your location.
Thanks for the replies

Dooglas · Post by **Dooglas** » Sun Aug 07, 2016 5:49 pm

DeeDee wrote:Jets are what were in the bike when bought new from the dealer.

Yes, and you raised the perfectly reasonable question of whether the scooter may have been rejetted for operation at higher elevations. An excellent question that could probably only be answered by the dealer in Denver who sold the scooter. (or someone else who removed the jets and looked)