Altitude question for Jetting.

GoldenMotor.com

allen standley

Well-Known Member
Oct 22, 2011
1,126
238
63
Bangor, Maine
Is the motor running? Don't change a thing til she up and running. Stock Jet with stock muffler should get you thru break in. I'm at 65 ft. ASL I set clip at middle position and get through break in. It may run boggy at first but gets better after time. Also - others have differing opinions but I never run 16:1 mix. Break in to me is no more than a thorough inspection of the motor itself. I start off with 4oz synthetic oil (32:1) to a gallon of regular FRESH gas. Keep Reading if this is your first kit.
 
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2door

Moderator
Staff member
Sep 15, 2008
16,302
175
63
Littleton, Colorado
I concur. Get some miles on that engine before worrying too much about jetting for performance. 200 is good, 300 is better.

700' MSL isn't very high so a jetting change based on that isn't the issue. Almost without exception these engines/carburetors are fuel rich and will benefit from some carb tuning. Run a few tanks of fuel, watch your spark plug color and go from there.
I also agree that the kit recommendation of a 16:1 mix is TOO MUCH oil. 24:1 is okay, 32:1 is better, even for break in. Good luck.

Tom
 

badmoon

New Member
Jul 11, 2008
34
0
0
Canada,Québec (french)
My engine run well still boggy when in middle RPM but im in break in mod for the moment first 2.5 liter was is 16:1 mix and my seconde tank 5 liter are in 24:1 mix so after that I think I can go 32:1 but not sure after 7.5 liter of gas .

And if I don't need to rejet cause of altitude it's good news :)

I have bought 10 jet from sick bike parts 5 for cns and 5 for NT carb so I think I will test that after break in.

My spark plug color is nice .

Anyway with the expansion chamber i've gain a max of torque that's really cool .

Here's my bike look.

 
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