Jetting in advance of riding

 

Assembled masses:

My WR250 (1997 two smoke) is going to CO in a few days
and I need jetting advice that I may ignore but I'm desperate.
My 2-stroke Tuner's Handbook (Jennings) is AWOL, musta
lent it to some scumbag biker.

I found various recommendations but here's where I think
I am in guessing what to put into my carb pre leaving
for CO (9800 feet base camp)  from Clevo, OH:(about 650 feet)

Main - 88% of the number on the main now - 360 now so 310-320.
Pilot - same
Needle jet - 2 size smaller
Needle clip - one lower (clip higher)

Now all of that is a wild ass swag but according to my
non-reliable sources, will get me in the ballpark so that
I can get it right on site in CO.

Ya got an opinion, now's the time.


Go fast. Take chances.
Mike S.

 

"sturd" is planning to get high:


Remember that the human body runs on oxygen.
Take it easy the first couple of days if that's an option.
Have fun. I'm jealous.

 

Dean H. remembers:


We're taking O2 bottles.  I hope.



Not with a .sig like:


Go fast. Take chances.
Mike S.

 

96b7-2550a00aa465@m73g2000hsh.googlegroups.com:


I recall going through mountain passes out there on a CB160. Had to jet
down the main 4 sizes, no other changes. Power was reduced, but at least
it didn't blubber.

 



You might try pinging the other *Tuner's* handbook. mxtuner at
hyperformancecycles dot net  The boy is back riding a smoker & talking about
racing a HS this weekend....all on a blue bike at that (YZ250)

There was a contingent from Georgiaoffroad that just made a CO trip lead by
the Paul Wright (the owner of Highland Park Resort in Cedartown GA). Paul
was asked what worked better at altitude, the smokers or thumpers.....to
which he replied...

"The 4 strokes were much more particular about jetting and starting easily.
Climbing and descending thousands of feet in altitude was a bigger issue for
them than the 2-strokes.

All the bikes ran like a worn out XR200 at the top of the highest peaks
where there was 60% less oxygen. We men ran worse than that..."


--
KW

aka KW, DirtBikeDad, warrenmountain
'03 Kawasaki KDX220R
'01 Honda XR100R
'03 Yamaha TTR125L
'90 Kawasaki Bayou220