Planet Minis

foxracer196 · 10-22-2009, 07:18 PM

ok i have a 05 yz 85 that ive had for about 2 years now and about 3 months ago i blew it up and had to put another crank in so we did all that and after that all ran fine until i got hit on the trails by another rider and it completely crushed my pipe after that we put the stock pipe back on and it runs like crap now in 1 2 and 3rd gear it bogs crazy at mid powerband and then at the top of the rpms it runs like it has a rev limitor on but it runs fine in 4 5 and 6 what do you guys think it is

87Pitracer · 10-22-2009, 07:39 PM

I haven't worked on 2 strokes for a while, but if you had an aftermarket pipe on and now you have the stock pipe back on - it is probably more restrictive. You may have to lower the needle in the carb and possibly lower the main jet. Did you have to do the opposite when you put the aftermarket pipe on?

rlm996 · 10-22-2009, 08:28 PM

Check the jetting. Stock main should be a 138. Stock needle should be a NBKF. Put the needle clip in the middle position. Stock pilot is a 45. Check your reeds also. Maybe one of them got jarred loose or broke during the impact.

foxracer196 · 10-22-2009, 08:38 PM

i dont think its anything to do eith the jets weve tried just about every combination of jets and it doesnt make a difference and weve messed with the needle

crf50luke · 10-22-2009, 08:52 PM

buy a new aftermarket exhaust

foxracer196 · 10-22-2009, 09:06 PM

right now im running a 138 and a 42 i dont think that the exhaust has anything to really do with it and i also have v force reeds

foxracer196 · 10-23-2009, 03:53 PM

we switched to all stock jetting and now it just does it really bad in 1st gear and a little in 2

kijen · 10-24-2009, 06:27 AM

stock yz85's always seem to be rich anyways, try going leaner on the main, or mess with your needle poistion, sounds like nothing is wrong mechanicly, just jetting...

foxracer196 · 10-24-2009, 11:36 AM

weve tried just about ever jet setting possible and all the needle movements and still nothing

rlm996 · 10-24-2009, 10:28 PM

Has the cylinder been ported? Maybe the stock pipe is too restrictive.

10-22-2009, 07:18 PM	#1 (permalink)
foxracer196 3rd Gear Member Join Date: Dec 2008 Location: twin peaks Posts: 1,264 My Mood:	05 yz 85 tech ok i have a 05 yz 85 that ive had for about 2 years now and about 3 months ago i blew it up and had to put another crank in so we did all that and after that all ran fine until i got hit on the trails by another rider and it completely crushed my pipe after that we put the stock pipe back on and it runs like crap now in 1 2 and 3rd gear it bogs crazy at mid powerband and then at the top of the rpms it runs like it has a rev limitor on but it runs fine in 4 5 and 6 what do you guys think it is

10-22-2009, 07:39 PM	#2 (permalink)
87Pitracer PM Newbie Join Date: Nov 2008 Location: Hebron, KY Posts: 35	Re: 05 yz 85 tech I haven't worked on 2 strokes for a while, but if you had an aftermarket pipe on and now you have the stock pipe back on - it is probably more restrictive. You may have to lower the needle in the carb and possibly lower the main jet. Did you have to do the opposite when you put the aftermarket pipe on?

10-22-2009, 08:28 PM	#3 (permalink)
rlm996 2nd Gear Member Join Date: Apr 2008 Location: SWL Michigan Posts: 805 My Mood:	Re: 05 yz 85 tech Check the jetting. Stock main should be a 138. Stock needle should be a NBKF. Put the needle clip in the middle position. Stock pilot is a 45. Check your reeds also. Maybe one of them got jarred loose or broke during the impact.

10-22-2009, 08:38 PM	#4 (permalink)
foxracer196 3rd Gear Member Join Date: Dec 2008 Location: twin peaks Posts: 1,264 My Mood:	Re: 05 yz 85 tech i dont think its anything to do eith the jets weve tried just about every combination of jets and it doesnt make a difference and weve messed with the needle

10-22-2009, 08:52 PM	#5 (permalink)
crf50luke 2nd Gear Member Join Date: Mar 2008 Location: laton,cA Posts: 392 My Mood:	Re: 05 yz 85 tech buy a new aftermarket exhaust

10-22-2009, 09:06 PM	#6 (permalink)
foxracer196 3rd Gear Member Join Date: Dec 2008 Location: twin peaks Posts: 1,264 My Mood:	Re: 05 yz 85 tech right now im running a 138 and a 42 i dont think that the exhaust has anything to really do with it and i also have v force reeds

10-23-2009, 03:53 PM	#7 (permalink)
foxracer196 3rd Gear Member Join Date: Dec 2008 Location: twin peaks Posts: 1,264 My Mood:	Re: 05 yz 85 tech we switched to all stock jetting and now it just does it really bad in 1st gear and a little in 2

10-24-2009, 06:27 AM	#8 (permalink)
kijen PM Newbie Join Date: Dec 2006 Posts: 90	Re: 05 yz 85 tech stock yz85's always seem to be rich anyways, try going leaner on the main, or mess with your needle poistion, sounds like nothing is wrong mechanicly, just jetting...

10-24-2009, 11:36 AM	#9 (permalink)
foxracer196 3rd Gear Member Join Date: Dec 2008 Location: twin peaks Posts: 1,264 My Mood:	Re: 05 yz 85 tech weve tried just about ever jet setting possible and all the needle movements and still nothing

10-24-2009, 10:28 PM	#10 (permalink)
rlm996 2nd Gear Member Join Date: Apr 2008 Location: SWL Michigan Posts: 805 My Mood:	Re: 05 yz 85 tech Has the cylinder been ported? Maybe the stock pipe is too restrictive.

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