Planet Minis

tepco · 09-23-2009, 07:25 PM

I'm working on two 1986 TRX70's for a friend. I put a brand new carb and spark plug on one of them and it runs great but if i let it sit and idle the idle will slowly drop until it finally stalls.

I searched for idle posts but couldn't find any.

Thanks

ARDVARK · 09-24-2009, 04:25 PM

Could be a float adjustment.

schofell84 · 09-24-2009, 05:29 PM

plugged petcock/line/filter

or lack of oil

schaeninc · 09-27-2009, 05:00 PM

on the carb are to screws one is air/mixture screw one is a idle screw run them in till closed and then back them out 1 to 1.5 turns and start there then itd just a matter of find a happy median

yzrcr73 · 09-27-2009, 05:06 PM

try cleaning airfilter

tepco · 09-27-2009, 06:26 PM

Thanks guys ill give the air/fuel mixture and air filter a shot and post back. I just ran it up the block and back wide open 1st-4th and it ran great so I'm thinking you guys are on the right track, because it only has issues at idle.

I'm also going to check for a post on adjusting the valves, don't know what they should be set at.

arlindsay1992 · 09-30-2009, 12:09 PM

0.002" intake and 0.003" exhaust. I have a video on how to do it but I can't post the link at school. If you're in a hurry. Search YouTube for "how to set honda 50/70 valves" or something like that. My YT username is TheAlexManVideos.

tepco · 09-30-2009, 05:11 PM

So i tried to clean the air filter and it disintegrated so time to get a new one. In the mean time ill adjust the valves, thanks for the YT info arlindsay1992 good job on all the vids!!

09-23-2009, 07:25 PM	#1 (permalink)
tepco PM Newbie Join Date: Dec 2005 Location: Greensboro N.C. Posts: 92	TRX70 Slowly Fading idle to stall? I'm working on two 1986 TRX70's for a friend. I put a brand new carb and spark plug on one of them and it runs great but if i let it sit and idle the idle will slowly drop until it finally stalls. I searched for idle posts but couldn't find any. Thanks

09-24-2009, 04:25 PM	#2 (permalink)
ARDVARK PM Newbie Join Date: Dec 2006 Location: Powhatan, Virginia Posts: 52	Re: TRX70 Slowly Fading idle to stall? Could be a float adjustment.

09-24-2009, 05:29 PM	#3 (permalink)
schofell84 2nd Gear Member Join Date: Feb 2007 Location: Ogdensburg Posts: 278	Re: TRX70 Slowly Fading idle to stall? plugged petcock/line/filter or lack of oil

09-27-2009, 05:00 PM	#4 (permalink)
schaeninc PM Newbie Join Date: Sep 2009 Posts: 1	Re: TRX70 Slowly Fading idle to stall? on the carb are to screws one is air/mixture screw one is a idle screw run them in till closed and then back them out 1 to 1.5 turns and start there then itd just a matter of find a happy median

09-27-2009, 05:06 PM	#5 (permalink)
yzrcr73 1st Gear Member Join Date: Aug 2008 Location: Straight out of Mahwah,NJ Posts: 241 My Mood:	Re: TRX70 Slowly Fading idle to stall? try cleaning airfilter

09-27-2009, 06:26 PM	#6 (permalink)
tepco PM Newbie Join Date: Dec 2005 Location: Greensboro N.C. Posts: 92	Re: TRX70 Slowly Fading idle to stall? Thanks guys ill give the air/fuel mixture and air filter a shot and post back. I just ran it up the block and back wide open 1st-4th and it ran great so I'm thinking you guys are on the right track, because it only has issues at idle. I'm also going to check for a post on adjusting the valves, don't know what they should be set at.

09-30-2009, 12:09 PM	#7 (permalink)
arlindsay1992 "High Speed Record Guy" Join Date: Mar 2006 Location: Northern Virginia Posts: 4,369	Re: TRX70 Slowly Fading idle to stall? 0.002" intake and 0.003" exhaust. I have a video on how to do it but I can't post the link at school. If you're in a hurry. Search YouTube for "how to set honda 50/70 valves" or something like that. My YT username is TheAlexManVideos.

09-30-2009, 05:11 PM	#8 (permalink)
tepco PM Newbie Join Date: Dec 2005 Location: Greensboro N.C. Posts: 92	Re: TRX70 Slowly Fading idle to stall? So i tried to clean the air filter and it disintegrated so time to get a new one. In the mean time ill adjust the valves, thanks for the YT info arlindsay1992 good job on all the vids!!

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