Hi guys,I need some help. Where I go riding, I start at sea level and go up the mountains to 4000ft or higher, as I get higher the idle goes down and gets to the point where it dies all the time, we ride some pretty tight technical trails and I need to concentrate on the terrain rather then revving it to keep it running. I'm guessing it has to do with the air screw, should I stop and turn it out a 1/4 to 1/2 turn on the way up? Would the RB carb/head mod be what I am looking for? Also, I don't think it has the low end snap that I keep hearing about,mid range and up, touch the gas and instant response, if I'm in 2nd gear at 1/8 throttle and gas it to pop the front end over a log, does not happen till it revs up a bit? I'm running a 135 main/42 pilot and the clip is 2nd from the top.
Another thing, does anybody else get a sharp kick in the back when you hit a pot hole at highspeed, I get a jolt up my spine that makes me want to stand up all the time! I'm thinking it is time to get the shock rebuilt or is this normal?
jetting,idle,altitude
-
- Supporting Member II
- Posts: 342
- Joined: 11:20 pm Jul 23 2013
- Country:
jetting,idle,altitude
97-220 with a PC pipe. 2015- RB carb and head mod
- G22inSC
- Supporting Member I
- Posts: 513
- Joined: 10:23 pm Jul 24 2006
- Country: United States
- Location: South Carolina
jetting,idle,altitude
200 or 220?
'05 Kaw KDX200 ('00 KX125 forks / '02 RM125 Showa "K2" shock)
'14 Yam YZ125(x) (oldest boy's)
'22 Yam YZ125X (youngest boy's)
'17 Yam YZ85 (soon to be FOR SALE)
'10 Honda Recon (wife's)
'08 Kaw KX65 (Sold)
'07 KTM 50SX Sr. (Sold)
'09 Yam PW50 (retired)
'97 Kaw KX250 (Sold)
Gallery
2005 KDX200 Bike Profile
'14 Yam YZ125(x) (oldest boy's)
'22 Yam YZ125X (youngest boy's)
'17 Yam YZ85 (soon to be FOR SALE)
'10 Honda Recon (wife's)
'08 Kaw KX65 (Sold)
'07 KTM 50SX Sr. (Sold)
'09 Yam PW50 (retired)
'97 Kaw KX250 (Sold)
Gallery
2005 KDX200 Bike Profile
- bufftester
- Platinum Member
- Posts: 3461
- Joined: 06:03 pm Oct 31 2012
- Country: USA
- Location: University Place, WA
Re: jetting,idle,altitude
sounds like you should take a trip through the jetting guide. Properly dialed in you should be able to maintain a fairly consistent powerband as you climb using just the air screw to keep idle up.
-
- Supporting Member II
- Posts: 342
- Joined: 11:20 pm Jul 23 2013
- Country:
jetting,idle,altitude
Sorry,it's a 220 with a PC pipe on it.
97-220 with a PC pipe. 2015- RB carb and head mod
-
- Supporting Member II
- Posts: 342
- Joined: 11:20 pm Jul 23 2013
- Country:
jetting,idle,altitude
After reading the jetting guide once again I'm guessing I will be adjusting the air screw all the up and down the trails to keep the idle consistent, and I'll have to raise the needle 1 clip to get the snap I want a low revs. Simple,right?
97-220 with a PC pipe. 2015- RB carb and head mod
- TWMOODY
- Gold Member
- Posts: 752
- Joined: 08:10 pm Dec 01 2006
- Country:
- Location: Southeast , Michigan
jetting,idle,altitude
RB sells a modified air stryker carb that is more forgiving for temp and altitude changes.