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View Poll Results: What is your Jetting Main and Pilot, Pick 2?
Main Jet 100 to 108 1 50.00%
Main Jet 110 to 115 0 0%
Main Jet 120 to 125 1 50.00%
Main Jet 130 to 135 0 0%
Main Jet 140 0 0%
Pilot Jet 32 to 35 1 50.00%
Pilot Jet 40 1 50.00%
Pilot Jet 45 0 0%
Pilot Jet 50 0 0%
Pilot Jet 55 0 0%
Multiple Choice Poll. Voters: 2. You may not vote on this poll

 
 
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Old 07-29-2017, 11:15 AM   #1
gmcjetpilot   gmcjetpilot is offline
 
Join Date: Jun 2017
Posts: 13
Scooter Jetting - First Time Advice? 150CC CY6

OK I really like my BMS Prestige 150. However it is running lean (plug is white white white). My first UP jetting is described below. I'd like advice and comments (sage wisdom)....

Removed original 110 main and went in with 120 main, I skipped 115 since I am so lean. (what size jet should I go to if this is not enough. My choices are 125, 130, 135 & 140.

Removed original 32 pilot. I went in with 35 pilot, next size up with the jet kit I received. My next choices are 38, 40, 42, 45, 48, 50, 52 & 55.

Pilot Jet - Original was short, sat deep in the pocket it screwed into. New Pilot Jet is longer, mouth sits flush or slightly proud. (is this a big deal?)

Needle has a flat top and does not have clip ring adjustment.... (is this a needed mod, where you can adjust the height?)

I only took it on a short test hop. Seems to run fine, as usual. No top speed test. Still a little boggy in mid range acceleration, but overall same or slightly better.

I am still trying to break it in. With 150 miles on OD I tried to go for top speed first time. Not impressed. Seemed fine at 45 mph, but I was surprised at low top end. I thought 55mph would be doable? I think the wind-screen I put on might be draggy. The BMS Prestige 150 has a big body work and fairing. I like it, but it must cost speed.

COMMENTS FOR A NEWBE RE-JET-ER....



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Last edited by gmcjetpilot; 07-31-2017 at 11:39 PM.
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