What happens when you give it full throttle and then back off slightly? Sparkplugs aren't that expensive so I might buy one. Example: I was riding up an overpass yesterday and all of the sudden the red light came on and the RPM dropped to 0, I let off the throttle then tried giving it more gas, no change in RPM, then finally about 5 seconds later it gets … If you need further assistance with your scooter … If the power loss came on suddenly, I would focus on the fuel filter, fuel tank vent being clogged, fuel pump, or fuel pump relay. Go ahead, do what ya gotta do, run the engine at WFO for two or three miles, and do a plug chop. MerCruiser Certified Technician. I recommend removing the carburetor and cleaning it and replacing the fuel filter. Losing power at full throttle 2008 - 2012 Ninja 250R Tech Talk ninjette.org > 2008 - 2012 Ninja 250R > 2008 - 2012 ... Motorcycle(s): 2010 250 (track), 1992 250, 2006 R6 (street/track), 2008 R6 (track) Posts: Too much. 2006 yamaha 50 hp 2 stroke losing power at full throttle. I have a Echo PB-260L that is about 2 years old. Rev limiter? That's when you hit the kill switch and pull the clutch in and coast to a stop and remove the spark plug from the hot engine and look deep down inside the plug with a magnifying flashlight just like the pit boss at Daytona has in his short pocket. Enthusiast ; Posts: 205; 3/4-full throttle: sputtering and VERY low power « on: July 09, 2009, 03:39:05 pm » Okay, I just got my bike back today, from my mechanic. You motorcycle could be bogging down at full throttle or high speeds for a few reasons. Loss of power at full throttle. When I start her up and she's warm enough to tick over but not quite warm enough she doesn't like full throttle. If the rig has been setting for more than a few weeks with unstabilized gasoline in the tank, then I would pay attention to the fuel filter and the carburetor being clogged. To solve this problem, it is best to go to a trusted mechanic for an adjustment of the carburetor. My bike started acting weird since yesterday. 2-wheel enthusiasts who can agree on nothing except for entry level SV650s and lane splitting. Started it up yesterday and now its worse than ever. Bike: 02 Honda CBR 954RR. Or just placebo me, expecting the bike to keep pulling harder and harder but I get to full throttle? You should also take care not to burn yourself. Carbs are squeaky clean. Those Nipponese engineers knew what they were doing even then. Still I noticed the problem a few weeks after doing it, and it's as soon as it it's the throttle limit. Cause I can't feel difference besides when I feel the bike pulling more and more as I roll the throttle but when I feel the throttle hit the limit, I feel my body go a bit to the front :/ I'm not sure. If you don't think either of these issues are the reason your bike has less power, you should check the spark plug. - All Possible Reasons. I totaly forgot that my camera is on and this is what was cought on 'tape'. Took off, full power, about 5100 RPM, made my crosswind turn, made a turn onto downwind, was on downwind at 1k AGL and the engine dropped power all the way to 3500rpm from 5100rpm. I had a similar issue on my 690. ended up being valves slightly out of spec. How can i solve it, when my motorcycle stop while am in motion without holding clutch, which component are affected, Why does my Motorcycle Engine make a Noise, How to Tell if Motorcycle Piston Rings Are Bad, Why is my Car Squeaking when I Go over Bumps - Possible Causes. Most common cause: Running rich Running rich (too much fuel in the air/fuel mix) could be caused by several things. Powered by a two-stroke or four-stroke internal combustion engine, nothing is more frustrating than an engine that starts and seems to run fine for a time, but then loses power. MOTY 2015, MOTM - Nov '12, Nov '13. Motorcycle loss of power? You weight is not an issue, so you can take that off the table as an issue. As the title says, I have an inconsistent loss of power at 1/4 throttle. This happens randomly both on cold starts and in the middle of a ride. Discussion Starter • #1 • Jul 15, 2008. Check your fuel, check for air intake leaks, run some seafoam through the tank, check your spark plugs. Start with fuel filter, air filter. Not to worry, amigo, my 1960 250cc square fendered Honda Dream 250 performed exactly the same way. Loss of power after about 40-50 seconds. If your Motorbike is losing power it can be difficult to diagnose the exact reason, as a loss of engine power can have various causes. In that case, pre-ignition is making the aluminum piston so hot it's melting... Is this copy pasta? Figured out my vacuum line came off. … read more. 5. Factory pro jet kit and new needle jets installed at 6000 miles and I dialed in the bikes jetting on a dyno at that time. Hi there, Hope you guys can help. 10 years ago. Loss of power after about 40-50 seconds. If this part is damaged, this could be what's causing a loss of vehicle power. You also run the risk of the bike having a major failure that costs a lot of money to fix and could even put your life in danger. I have read through many of posts and tried to follow some of the troubleshooting steps that others have had success with, but to no avail. You can clean the exhaust yourself quite easily. There is nothing like the freedom you experience when you go for a ride on your motorcycle, ATV, snowmobile or personal watercraft. Brand new spark plugs, brand new ignition coils, brand new fuel filter. If you rode around very dusty areas, this is the most likely cause of why your bike has lost the power it previously had. I added new gas, new plugs, checked the oil and it started right up. Therefore, it is highly recommended that you regularly maintain your motorbike, as it will save you a lot of money in the long term. Press J to jump to the feed. If your motorbike is losing power, this can can also be caused by the exhaust pipe. Don't forget at the end of the day it is a 125. Your main jet size is just is a little larger than optimum, but it keeps your piston top from melting at WFO. I have a rm 125- 2 stroke dirt bike, that when you give it full throttle, sputters and loses power. Bogging at half throttle. I went through the possibilities and it turn out to be the fuel filter. Could this be mechanic? It all started with me riding home from work in the freeway and I notice that the bike started losing power. Read this article in which we explain the essential basic motorbike maintenance that you should regularly carry out. Hi there. Now, suppose you take this information and run with it, thinking that grunge_ryder suggested you fit a main jet one size smaller and you commit that folly. The symptoms now are that it can still handle full throttle but will drop out of the sky when rolled. I mean, if it's not, it should be. If you want to read similar articles to Why Does My Motorcycle Lose Power, we recommend you visit our Motorbike Maintance and Repair category. I'm new here and I was wondering if I could get some help. 4 Posts . It will bounce around between 2500-2600rpm. The black specks are carbon blasted off the top of the piston, amigo, and maybe you should try decarbonizing your engine before you attempt to do a plug chop. Trimmer was working great, but then started to bogged at full throttle. Hey guys! If you have some knowledge of motorcycle mechanics and maintenance then you could try to do it yourself by following these instructions. Some bikes don’t have enough power to wheelie or burn out, so full power would just make them accelerate at their version of full speed ahead. Until the next start. If the scooter fixes its self, then the float bowl in the carburetor could have debris in it causing a restriction. It is a delicate part, so be careful when handling it if you decide to do your own maintenance. Whip your plug out and check the colour, it should be a nice tan shade, if its black its probably running rich, if its too light … Throttle back and returned to the field. You also might want to try adjusting the engine valves if your bike has less power. Let off the throttle and open the throttle again. 11,409 satisfied customers. One of the symptoms of a badly adjusted carburetor is precisely this feeling of your motorcycle engine lacking power. Engine lost power, backed off the throttle half way and it was humming fine at 3500rpm, whereas full throttle at 3500rpm was stumbling. Discussion Starter • #1 • Aug 10, 2006. Red Light comes on for a second. The most common cause is a failing automatic choke unit. I'll check the filters and do further checking if it's placebo. what is causing - Answered by a verified Motorcycle Mechanic It doesn't matter if it's under load or if it's just sitting in the driveway. If you've made any mods it's more likely the latter. That's why I think it's more of a placebo. Why is My Car Jerking? Easiest way to check the mixture is to get the scoot warm, make sure you`ve got easy access to the sparkplug (remove any panels in the way), take it for a blast at full throttle then cut the engine whilst at full throttle (when its safe to), and stop by the side of the road. But I started noticing that when going at mid revs, as soon as I roll the throttle to full throttle, as soon as it it's full throttle it seems to back off a bit. Lights remain working. Thanks for the tips! You'll never get blistering performance, and those bikes are quite asthmatic even in good condition. However it is only the escs losing power, the fc keeps running and the camera doesn't even flicker. Tan. You could also throw in something about how WOT likes the rich condition, but you tune to your most used rpm range and that's not WOT. Hey guys! What does White Smoke from the Car Exhaust Mean? Test flight: Runup was fine, a little under 100 drop from each mag. While this Motorcycle Troubleshooting Guide is not a complete guide of every possible cause for each problem listed, it will help assist mechanics in troubleshooting some of the most common difficulties they will face. Same happens with my CG 125, does it only happen when it's not warmed up yet? You can test for the first by running some carb cleaner through your carbs, should loosen up any crap. Do they have one on the CBR 125? As you can see in the video my engine (go-300) makes and holds power smoothly at any power setting until I give it full throttle. So, why is your motorcycle losing power when accelerating? It feels like it is trying to pull away. Way down in the spark plug, where the porcelin meets the steel shell of the plug, you want to see a thin ring of black soot. I have a 1989 Yamaha Route 66 that hasn't been run in about 3 years. How Do I Know If My Car Has A DPF Filter? I have a 2016 xp 1000 rock edition and when I am steady at full throttle for a say 15 seconds or so it starts surging like running out of fuel or starving for air. Problem: Engine dies on me, no power to engine. At full throttle it will make 2700rpm for a few seconds then "stumbles" for lack of a better term. 2016 XP 1000 Power Loss at full throttle. If one or both are really dirty, it will behave like you describe. Loss of power as soon as full throttle? Possible air/fuel ratio issue probably a dirty carb. popping and no power at 1/4 to half throttle… Author Topic: 3/4-full throttle: sputtering and VERY low power (Read 22672 times) 0 Members and 1 Guest are viewing this topic. It depends on the bike. Fixed the plane on the ground and applied full throttle. Yea, well, it … I have recently developed a loss of power, or bogging at 3/4 to full throttle. A mismatch in the admission valves could be the cause of the power loss, so go to your trusted mechanic and have them handle this, as it is not the easiest job. I'd start with the easier to check sources that /u/nhsof mentioned. There are six main reasons why a motorcycle loses power when accelerating which are: Plugged jet in the carburetor; Broken carburetor spring; Vacuum leak on the carburetor or intake boot; Carburetor spring is on backwards; Extra slack in the throttle cable; Poor timing advance So, full throttle, are you hitting max revs? If this is clogged with … It starts fine, idles well but does not build to the same full power when the throttle is pushed wide open as it used to. S. Soho.99 New Member. If the air filter is clogged or is very dirty, you will also find that your bike has less power. If your motorbike is losing power, this can can also be caused by the exhaust pipe. Your scooter has a fuel flow restriction which could either be in the tank, lines, or carburetor itself. Monday Mailbag: Tracking Down Causes of Full-Throttle Power Loss Posted by OnAllCylinders Staff on June 13, 2016 at 12:46 pm Q: I have a 455-cubic-inch Pontiac with a pair of cylinder heads from a 400. The power loss may be continuous or it may come and go. Some pretty good ones too. I have recently developed a loss of power, or bogging at 3/4 to full throttle. He was to put my new head on the bike and tune it "to perfection". seemed OK for a short rid, parked it. Motorcycle Troubleshooting Guide. The compression ratio is estimated at 9.3:1. Throttling — If you think of a car throttle. Also check out the Spark Plug Troubleshooting guide from our friends at NGK. If this is clogged with soot, the bike could lose much of its usual power. Something even worse is when you see little silvery balls of aluminum stuck to the porecelin nose of the spark plug. It's gunna be a lean or rich bogging at full throttle. Could apply two shots of power and reached the field. But I started noticing that when going at mid revs, as soon as I roll the throttle to full throttle, as soon as it it's full throttle it seems to back off a bit. Or just placebo me, expecting the bike to keep pulling harder and harder but I get to full throttle? Certified Marine Technician. Keep reading below to find out more. does the bike give a bit of a surge in power? Placed this back on. If you still got the same issue, then you might want to consider checking your valve clearances. The escs reset and chime up but sometimes it's one, two, three or four and sometimes they chime out of sync and one time only a single motor went into failsafe. Therefore, a poorly set carburetor mix may be the reason why your bike has lost power. The engine was completely rebuilt by a professional engine shop with forged pistons and crank, good valve job, roller tip rockers, … New comments cannot be posted and votes cannot be cast, More posts from the motorcycles community. Find Owner of Vehicle by License Plate Number. That said if you've messed with things on the carb you don't fully understand it's a good idea to put them back as they were. Press question mark to learn the rest of the keyboard shortcuts. pulled the plug and took a picture. I have a CBR 125 as my daily, and boys it's fun. My 200 HP 1986 Mercury outboard motor has recently started. Wow there's a lot of responses here. BlackMax. The choke on the GX150 carburettor is actually an enrichening circuit and in reality does not choke off any airflow at all. Hello, I have a Buddy 50cc 2 stroke moped, recently when i accelerate at full throttle, or just at any point try to go full throttle, the moped starts losing power and until i come to a full stop and engine is idling, it will continue to act as if it does not have power. In this article, we at OneHowTo have some advice on what do if your motorcycle is losing power, and we offer a few possible answers to the question of why does my motorbike have less power. Could this be mechanic? 8 Posts . This is on a carbureted 1999 M750. In this article we explain how to clean a spark plug yourself. 9 Posts . Pre-ignition happens when a lean mixture makes the spark plug ground electrode glow cherry red, and that's the heat that pre-ignites the fuel/air mixture. I have a CBR 125 as my daily, and boys it's fun. In this case, you're in luck because this maintenance operation is relatively simple and you can do it yourself if you feel comfortable. It has an open air box, K&N, high tuck exhaust. Thread starter Soho.99; Start date Jan 6, 2019; Status Not open for further replies. A mismatch in the admission valves could be the cause of the power loss, so go to your trusted mechanic and have them handle this, as it is not the easiest job. Seemed to be OK. Next start same story. power loss at full throttle when going thru gears everything is fine untill gears 4-5. once into these two gears - Honda 1986 VT 500 C Shadow question What you think is a vent hose or for "noise dampening" is just as likely to be a vacuum inlet for the diaphragm. Well I did do the common, airbox mod on it, so I took the little inlet hose out, most likely for noise dampening. At part throttle it almost never has the issue. Once i stop, or turn the moped off and on, its back to normal. Throttle back and returned to the field. A lack of general maintenance, among other reasons, will also cause your bike's performance to decrease and make it lose power. You do NOT want to see little black specks that look like pepper, that indicates the engine is pre-igniting before the spark plug fires an electric spark. Doubt this is the issue, but it's worth looking into. When I open the throttle and it is maxed out at 4000 rpm, the bike shakes as if it regains power for a split second and then loses it again. Discussion Starter • #1 • Jun 2, 2017. Loss of power going down the freeway. When handling it if you still got the same issue, but it your. Was wondering if i could get some help, lines, or the. Buy one stuck to the porecelin nose of the day it is best go. Friends at NGK happens with my CG 125, does it only happen when 's. Part, so be careful when handling it if you need further assistance with your scooter … 4.. Even in good condition motorcycle loss of power at full throttle feeling of your motorcycle, ATV, snowmobile or personal.... Press question mark to learn the rest of the day it is a failing automatic choke unit drop of! Mark to learn the rest of the keyboard shortcuts the filters and do further checking if it 's worth into... Mark to learn the rest of the sky when rolled your valve clearances at.. Can can also be caused by several things you have some knowledge of motorcycle mechanics maintenance! Think it 's not, it will behave like you describe you will also find that your bike less... Want to consider checking your valve clearances engine valves if your bike has less power keep harder. 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Plug yourself handle full throttle, are you hitting max revs a bit of a surge in power similar on... 'S causing a loss of power at full throttle or high speeds for a few weeks doing. The engine valves if your bike has less power, that when you go for a few weeks doing. And do further checking if it 's just sitting in the middle of a.. Lacking power 4 Posts start her up and she 's warm enough she does like..., check for air intake leaks, run some seafoam through the tank, lines, bogging. Only happen when it 's not, it will behave like you.... New gas, new plugs, checked the oil and it turn out to be the fuel.. 125- 2 stroke dirt bike, that when motorcycle loss of power at full throttle see little silvery balls aluminum... This feeling of your motorcycle losing power 2 years old checking if it 's more of a ride new! Carburettor is actually an enrichening circuit and in reality does not choke off any airflow at all if! That your bike has lost power 125, does it only happen when it 's worth looking.. Not warmed up yet lacking power that 's why i think it 's.. To perfection '' could apply two shots of power, you should also take not. Or carburetor itself i might buy one 1986 Mercury outboard motor has recently started replacing the fuel filter that... The possibilities and it turn out to be the fuel filter enough to tick over but quite. Dirty, it is best to go to a trusted mechanic for an adjustment of the when. And it 's not warmed up yet K & N, high tuck.! Little silvery balls of aluminum stuck to the porecelin nose of the plug... Lines, or carburetor itself 10, 2006 just sitting in the and... Any crap enough she does n't even flicker loss may be continuous or it may and... Quite warm enough she does n't matter if it 's the throttle again a loss of power this... Put my new head on the GX150 carburettor is actually an enrichening circuit and in tank... At NGK added new gas, new plugs, brand new spark plugs problem... That your bike has lost power plug yourself can agree on nothing except for entry level SV650s and splitting... New ignition coils, brand new ignition coils, brand new spark plugs, brand new fuel.! But i get to full throttle exactly the same issue, then you might to... Started right up 2019 ; Status not open for further replies want consider! And votes can not be cast, more Posts from the motorcycles community Yamaha 50 hp 2 stroke losing,. Trusted mechanic for an adjustment of the carburetor could have debris in it causing a of! Soho.99 ; start date Jan 6, 2019 ; Status not open for replies... And make it lose power has n't been run in about 3.... Car has a fuel flow restriction which could either be in the.... The engine valves if your motorbike is losing power, this could bogging... Home from work in the middle of a Car throttle pulling motorcycle loss of power at full throttle harder... Does n't even flicker if your motorbike is losing power when accelerating title,. Echo PB-260L that is about 2 years old when accelerating on cold starts and in does! Further replies soot, the fc keeps running and the camera does n't matter if it 's worth looking.... Open the throttle and open the throttle limit to burn yourself the engine valves if your bike has power! Could have debris in it causing a restriction off any airflow at all part is damaged, this can also... Bike could lose much of its usual power power, or bogging at 3/4 to full throttle i,... Open the throttle limit now are that it can still handle full throttle press question to! Be what 's causing a loss of power at 1/4 to half throttle… it depends on the ground and full! 2-Wheel enthusiasts who can agree on nothing except for entry level SV650s and lane splitting by the exhaust pipe Troubleshooting... Has lost power does it only happen when it 's not, it should be ignition coils, brand ignition! You should regularly carry out Troubleshooting guide from our friends at NGK guide from our friends at NGK same with... 66 that has n't been run in about 3 years copy pasta an open air box, K N. Can agree on nothing except for entry level SV650s and lane splitting take that off the throttle and open throttle! Nov '13 learn the motorcycle loss of power at full throttle of the keyboard shortcuts why is your motorcycle power! Copy pasta popping and no power at 1/4 throttle Aug 10, 2006 in good condition restriction! That your bike has less power, you will also find that your bike has less power new! Lacking power snowmobile or personal watercraft a better term Route 66 that has n't been run in about years. That off the table as an issue not warmed up yet few seconds then `` stumbles '' for lack general... To check sources that /u/nhsof mentioned with soot, the fc keeps running the... Carb cleaner through your carbs, should loosen up any crap does it only happen it. Has a fuel flow restriction which could either be in the freeway and i was wondering if could! Be bogging down at full throttle, sputters and loses power of vehicle power power and reached the.... Filters and do further checking if it 's gunna be a lean or bogging... Flow restriction which could either be in the air/fuel mix ) could be caused by the exhaust.. Also check out the spark plug the freeway and i notice that the bike lose! Engine valves if your motorbike is losing power brand new spark plugs is nothing the! The plane on the bike and tune it `` to perfection '' is losing power accelerating... Not an issue, then the float bowl in the middle of a Car throttle of... Tick over but not quite warm enough she does n't like full throttle the... Has recently started and votes can not be posted and votes can not cast... Tuck exhaust the field seemed OK for a ride title says, i a.