Honda ct90 wont idle. I have cleaned the carb.

Honda ct90 wont idle Jan 26, 2021 · Many idle issues come from a blocked pilot jet. That spring was way too tight. It should spring back to idle when you let it go but, it doesn't. One has 930 miles on it, the other has 1300 miles on it. When I start it hot I have to give it full throttle to get it going. Honda Trail CT's Forums . It starts and runs great. The compression I got is 100 psi(i know that is not ideal) From here I am trying to get it to idle in a some what normal range. How do I get the idle to stay steady. Cleaned carb twice very very thoroughly, good fuel flow from tank to carb, have proper sized jets, choke works fine, needle on the middle slot, no vacumn leak. At mid throttle it dies out. Amazon link for carb https://amzn. My carb has the square shaped float bowl. When I bought the bike the carb's throttle valve was varnished tight. Starts first kick and will idle well. As soon as I let off the throttle and came to a stop the engine would stall. that adjusts fine, points are good, valves are adjusted. Both of them are in extremely good shape cosmetically, and as far as we can tell mechanically, they just have not ran for at least two decades. dieseldog;7473154 said: Nov 9, 2015 · 1974 Mars Orange Honda CT90 K5 1975 Topaz Orange Honda ST90 K2 1976 Shiny Orange Honda CT90. Dec 22, 2005 · Try removing the idle screw completely, and hold your finger over the hole. I was down in seattle for 5 days and I put an ad on craigslist "wanting to by Honda Apr 4, 2014 · 2006 Green Honda Foreman 500 - Viper Elite Winch 2004 Yellow Honda 250ex - Grandson's Bike 1971 School Bus Yellow "Spaghetti" Harley-D Sprint 350 1972 Candy Yellow Honda CL100 K2 1972 Candy Jet Green Honda CB500 1973 Mighty Green Honda ST90 K0 1974 Mars Orange Honda CT90 K5 1975 Topaz Orange Honda ST90 K2 1976 Shiny Orange Honda CT90 Jan 21, 2011 · ct90 : World's biggest Honda CT-90/110 resource There's also a CT90 forum with pretty good people. Sep 22, 2010 · I have a 79' ct-90. Specs for Aug 2, 2006 · Its kickin my butt. Save Share At idle the you should get 26-30v AC from all 3 legs. Aug 6, 2020 · 69 ct doesnt idle down after throttled up,thought it was cable sticking,not so works fine, carb? . May 14, 2017 · I just replaced the carb with a PZ22c from Webllc, and it started right up, seemed to run fine, then just like before, won't readily return to idle. 1983 Honda Gl650I Falcon-killer 80,000 miles. Then drain the Bad Gas May 14, 2017 · I just replaced the carb with a PZ22c from Webllc, and it started right up, seemed to run fine, then just like before, won't readily return to idle. Post by davebike » Wed Oct 26, 2022 7:07 am. Then I swapped the air filter with a smaller one and it seemed to solve the problem enough. I'm pretty sure the throttle itself on the handlebars is the problem, does anyone know if there are any that can be swapped over from another bike, or where I might find one? May 9, 2018 · I have a new carb. New plug. Bike won't idle with colortune. Not just the main. If I turn the throttle stop screw inward the idle speed would raise and the bike would idle, but the problem then is that it would not throttle down in between shifts. I've triple checked everything and scoured the interwebs and I've seen a number of people and posts with the same issue but never a resolution. MotorEra has some good photos and interesting info about the CT90K models. had new one for other 70 ct installed same respons ct90 idle problems - Honda Trail - CT90 & CT110 Forum Aug 22, 2011 · With a battery, the bike will only rev up half way and then it starts to sputter and wont rev any higher. We are looking Jul 22, 2010 · A Honda CT90 is like a goat or mule ~ it can and will go anywhere you want it to . Aug 22, 2010 · Good idle on my CT70 but bogs on throttle pretty bad. Jul 10, 2018 · Not just CT90. Works nicely if you want a low-cost cruise control! Add to that the throttle spring in the carb is pretty weak, and that many throttle cables also get gunked up, and I’m not surprised all of the Nov 8, 2008 · My CT70HKO's throttle sticks at whatever position I set it at. May 22, 2021 · The big problem with this bike currently is that the throttle sticks. Not terribly fast but easily and safely . The return spring in the top of the carburetor isn't very strong. Jan 30, 2015 · Consider the spark advancer. They show the actual OEM part number so you can Hello,I hope you can help me out. This can be caused by the small o-ring on the emulsion tube being dried or cracked which can create an inconsistent air leak. It justs doesnt want to return back to idle, makes for Apr 29, 2017 · 2006 Green Honda Foreman 500 - Viper Elite Winch 2004 Yellow Honda 250ex - Grandson's Bike 1971 School Bus Yellow "Spaghetti" Harley-D Sprint 350 1972 Candy Yellow Honda CL100 K2 1972 Candy Jet Green Honda CB500 1973 Mighty Green Honda ST90 K0 1974 Mars Orange Honda CT90 K5 1975 Topaz Orange Honda ST90 K2 1976 Shiny Orange Honda CT90 Dec 27, 2021 · My CT 90 definitely doesn't have a Stop/Run/Stop switch on the handlebars (like my 1980 CT 110 does). Aug 8, 2019 · We go over how to fix the no start condition I have with my 1979 Honda CT 90. Without a battery, the bike revs up perfectly. Oct 23, 2016 · Today, started and ran fine, but would not maintain an idle. But once its hot and you shut it off it wont start again. If you're struggling to get your Trail 90 to start and idle right, or if it stumbles off the line, this video is for you! For the record, my CT90 is a K3 bu Apr 28, 2021 · Hi, I have a 1972 CT90 with a clutch that never seems to diengage. Sometimes won't idle either when hot but idles fine when cold. Few ever put their CT's to a high speed twisty test . The guy said that there is no way the bike would run without a battery, but it does for me. I didn’t The throttle mechanism will hang up if the cable is bent or if the slide in the handgrip is gunked up. Unfortunately, the timing would not advance at any speed. Rick Apr 1, 2022 · This carb is the 78-79 round bowl version, but it is fairly similar to the earlier year carbs. The only remedy I've found to the high idle is the choke. So I've been working on this 1969 CT90 on and off for a few weeks and I just can't seem to get it. I'll start it, but when I give it even a tiny bit of throttle, it bogs down or dies bogging and won't rev - Honda Trail - CT90 & CT110 Forum Jan 20, 2024 · The shifting on my 1978 CT90 K9 is not smooth and occasionally it gets stuck in 3d or 2d when downshifting, especially when not rolling. And much of the info here is applicable to any carb. It lives under the main jet and is easy to remove so I was able to thoroughly clean it. Same for chinese carbs. . A few weeks ago I was having issues with the postie not idling 2-3 minutes after start-up, I took this as a great opportunity to give her some love with a carbie clean, air filter replacement, oil change out, spark plug change and general brake, chain adjustment etc. There's no varnish in the carb at all - I just cleaned it because in the past that's always been the solution to troublesome carbs in a bike that's sat. 1973 Mighty Green Honda ST90 K0 1974 Mars Orange Honda CT90 K5 Here is a Official Shop Manual for Honda CT90, CL90, CD90, C90 and S90 motorcycles manufactured from 1966 to 1977 downloadable PDF file. However, with the bike on the center stand, as soon as you open the throttle, it bogs, surges and sometimes backfires at WOT. It will idle maybe just a little lower than a normal idle speed when first started- but the idle screw is all the way in. Check the screw for damage. Check out my channel for how to rebuild your OEM carburetor as well. After it sits for an hour or so it will start again Mar 3, 2011 · My Lifan 110cc will start but won't get above idle without dying. If everything else checks out ok, remove the slide and see if it has a worn spot on the bottom where the idle speed screw contacts it. I agree an S90 is sexy, I used to have several but the overall utility of the CT won me over ~ interestingly enough, an S90 doesn't handle any better than a CT does . I put the old springs back on, and the problem has returned. The main theme is I can't get it to do the same thing twice. It starts easily on the first kick and idles pretty well. Also there are two adjustment screws on the carb. Oct 10, 2017 · NewToNineties wrote: Hello all, I'm into the home stretch with my '74 CT90 but I'm having a problem getting it to idle. Playing with both screws is never a good idea, tinny adjustments is all that would be required if the bike was running OK earlier. I had her running so good and now it won't idle right. Once I get the idle decent (still idles kinda high) I give it some throttle. So that won't work. It could be many things, but once you've ruled out bad fuel, valves, Oct 5, 2024 · I've tried messing with the idle fuel and idle air screw to no avail; it will either increase the speed, slightly lower it, or kill the engine outright. Save Share If it won't hold idle without the enricher on then it's running lean. facebook. Tiny, tiny little holes in there that get plugged up and effect the idle. I bought this a few weeks ago from a kid that had no clue how to make it run. com/profile. Reactions: misterclean59. How to narrow the problem down to a Fuel related issue. When it warms up just a bit- runs for less than a minute, the idle will drop off and it wont idle unless I hold the throttle. G'day guys, after rebuilding the carby for the Honda CT110 and thinking I had done a great job because it fired up straight away! There was an issue with it Jul 10, 2023 · Me and a friend recently bought a 1972 and a 1973 Honda CT90s trail bike pair. I've been experiencing some pretty bad shifting problems. I have just restored a 1971 honda ct90. It won't idle at less than 1500-2000 rpm by my estimation. 1973 Mighty Green Honda ST90 K0 1974 Mars Orange Honda CT90 K5 1975 Topaz Orange Honda ST90 K2 1976 Shiny Orange Honda CT90. I went to the Here is a Official Shop Manual for Honda CT90, CL90, CD90, C90 and S90 motorcycles manufactured from 1966 to 1977 downloadable PDF file. php?id=100057489818717&mi Jan 21, 2011 · ct90 : World's biggest Honda CT-90/110 resource There's also a CT90 forum with pretty good people. I like it around 1400 to 1500 rpm. They show the actual OEM part number so you can Jun 4, 2014 · Carb is clean. Once i start riding, after 10-30 seconds it will start to seem like its not getting good gas flow and it stalls out. May 21, 2011 · I dialed the idle right in. Nov 16, 2017 · In the end, timing is just another adjustment in tuning your CT90 and once your are comfortable with doing it, it enables you try things to help get your CT90 running at its best. DISCUSSIONS. I'm guessing it's around the 2500 to 3k rpm range. One is the idle mixture screw and the other one, below the cable, is the idle speed adjustment. - gas tank,installed a in-line fuel filter. Then drain the Bad Gas Jul 3, 2014 · Honda TRX 400ex won't idle. The misfire might end up being a faulty 125cc engine coil. Should the throttle twist grip return to idle when released like a real Jan 2, 2017 · HELP 400ex backfiring, won't idle. Oct 20, 2019 · Ok so some of you that read my introduction post seen that I have a Trail 90. I attempted to take my State's Motorcycle Safety Course with my bike but, it wouldn't pass the pre-ride check list due to the throttle issue. Pictures of my bikes Past and Present. With the same settings dialed in on the carb, the idle will hang and not come down. Apr 30, 2020 · Hello all, My name is Blake and I own a 2002 CT110 (Aus). Dan goes through various tests to determine why the orange Honda CT90 has been dying while riding. I bought a carb Jul 19, 2022 · I am completing a restoration of a 1975 Honda CT90 that was started by the previous owner. I hope you found this post helpful and that you're successful in setting the timing of your CT90! Related Posts My Process to get a CT90 that won't Start to Start Apr 27, 2009 · The place where fans of the Honda Trail CT-90's & CT-110's help each other. I am having trouble getting it to run smoothly on anything other than idle. same goes for all of the carbs on these Honda, Yamaha, and similar bikes of 90cc, 50cc, 110cc etc. He said 1979 CT90's must have a battery to run. The timing is on, the points are gapped, and I am beflommoxed. Use a strand of wire from a wire brush and ensure it will poke right through the pilot jet. I've looked all over. Jan 20, 2024 · The shifting on my 1978 CT90 K9 is not smooth and occasionally it gets stuck in 3d or 2d when downshifting, especially when not rolling. When I shift it into 1st gear at idle, on the center stand, the rear wheel spins I have a ct90 that I restored recently. Jun 4, 2014 · Creeping in gear typically means the idle rpm is set too high. Either the slow/pilot jet is clogged again, or the idle mixture Feb 16, 2019 · Most everyone who adopts an old Honda CT90 at some point gets to where the bike won’t start and your first instinct is to start making random adjustments, but no matter how many times you adjust or clean everything the bike just won’t start. 1974 Mars Orange Honda CT90 K5 1975 Topaz Orange Honda ST90 K2 Nov 12, 2010 · 1968 Honda CT90 Trail-Yellow Monster project 1979 Honda CX500 Supertanker 72,000 miles. Oct 16, 2017 · Issue - Your CT90 won't idle correctly unless you leave the choke partially on. Could I have a bad condensor? Aug 16, 2011 · The place where fans of the Honda Trail CT-90's & CT-110's help each other. Quick Reference Sheps Forum Supertanker Build Back up Info ⇒ Free Factory Service Manuals ⇐. The World of PowerSports site has the best online Honda microfiche we have found. to/39ANi3d Sep 11, 2018 · 72 honda ct90. You can see from my first pic that it’s missing quite a few pieces, but it was complete enough to allow $250 to leave my wallet. I have cleaned the carb. I try starting and it cranks fine but wont start. May 14, 2014 · 2006 Green Honda Foreman 500 - Viper Elite Winch 2004 Yellow Honda 250ex - Grandson's Bike 1971 School Bus Yellow "Spaghetti" Harley-D Sprint 350 1972 Candy Yellow Honda CL100 K2 1972 Candy Jet Green Honda CB500 1973 Mighty Green Honda ST90 K0 1974 Mars Orange Honda CT90 K5 1975 Topaz Orange Honda ST90 K2 1976 Shiny Orange Honda CT90 Aug 20, 2020 · I have a 1969 K1 CT90 and I know that for mine at least, the throttle tube can get mucked up and sticky to the point you have no throttle return. Right now it starts up easy, 1 - 2 kicks, and if you hold the throttle open a crack it stays running but when you let go the idle gets progressively slower until it dies. If Apr 4, 2014 · 2006 Green Honda Foreman 500 - Viper Elite Winch 2004 Yellow Honda 250ex - Grandson's Bike 1971 School Bus Yellow "Spaghetti" Harley-D Sprint 350 1972 Candy Yellow Honda CL100 K2 1972 Candy Jet Green Honda CB500 1973 Mighty Green Honda ST90 K0 1974 Mars Orange Honda CT90 K5 1975 Topaz Orange Honda ST90 K2 1976 Shiny Orange Honda CT90 Oct 26, 2022 · Rides:: Honda c90, Honda ct90 K4, Suzuki DRZ-400 Location: Buckinghamshire. When I get to mid throttle, even with no load, it breaks down popping and running rough, no power. So far (2000 miles ridden since I got the bike running in August), I am always able to get things back to normal by gently turning the throttle until there is Im working on a friends CT90, I set the valves at spec. The carb's over all condition was the same. MESSAGES. If Jun 9, 2014 · When it won't throttle up off idle tells me your pilot and needle height need work. Then It idles high so I adjust the idle and air mixture. If anyone knows for sure, did the 1972 CT 90 come with a kill switch, and where it should be located, I'd appreciate knowing (perhaps my bike has been modified). Could it be dirty or have weak springs that fail to pull the counterweight arms back in at idle? You absolutely nee to wire out the small holes in the carb jets, especially the emulsion tube. Save Share Bike starts easily, as long as I don't use the choke, and seems to ride fine. after rebuilding the carb, found out the battery is shot, and effecting the performance of the bikehttps://www. Sep 8, 2016 · 2013 Honda rancher 420 es It starts up normally, it will idle all day. May 12, 2023 · If you're having trouble with your Trail 90/110 starting, idling, or taking off from a stop, have a look at these tips. At first it idled fine, but would lag throttling on rides. 1974 Mars Orange Honda CT90 K5 1975 Topaz Orange Honda ST90 K2 1976 Shiny Orange Honda CT90. FORUMS. I can get it to idle at like 3-4k but when I start dialing it back it just wont act right. So far (2000 miles ridden since I got the bike running in August), I am always able to get things back to normal by gently turning the throttle until there is Dec 10, 2005 · The idle jet is definately clean. ijxku cdnza dpvmcij nspoi ojlzzq qgtyk lllxms panssrgk fwyhm enmabzw