Possible air/fuel ratio issue probably a dirty carb. 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. Those Nipponese engineers knew what they were doing even then. Doubt this is the issue, but it's worth looking into. Until the next start. I have a 1989 Yamaha Route 66 that hasn't been run in about 3 years. 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. If this is clogged with soot, the bike could lose much of its usual power. Throttle back and returned to the field. Certified Marine Technician. 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. 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. Once i stop, or turn the moped off and on, its back to normal. Problem: Engine dies on me, no power to engine. One of the symptoms of a badly adjusted carburetor is precisely this feeling of your motorcycle engine lacking power. You motorcycle could be bogging down at full throttle or high speeds for a few reasons. This happens randomly both on cold starts and in the middle of a ride. 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. Press question mark to learn the rest of the keyboard shortcuts. It all started with me riding home from work in the freeway and I notice that the bike started losing power. I totaly forgot that my camera is on and this is what was cought on 'tape'. 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. 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. The engine was completely rebuilt by a professional engine shop with forged pistons and crank, good valve job, roller tip rockers, … 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. Yea, well, it … Read this article in which we explain the essential basic motorbike maintenance that you should regularly carry out. - All Possible Reasons. That's why I think it's more of a placebo. 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. Lights remain working. I have a rm 125- 2 stroke dirt bike, that when you give it full throttle, sputters and loses power. Loss of power after about 40-50 seconds. Wow there's a lot of responses here. 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. Sparkplugs aren't that expensive so I might buy one. The most common cause is a failing automatic choke unit. Most common cause: Running rich Running rich (too much fuel in the air/fuel mix) could be caused by several things. Therefore, it is highly recommended that you regularly maintain your motorbike, as it will save you a lot of money in the long term. 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. 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. 5. If you don't think either of these issues are the reason your bike has less power, you should check the spark plug. BlackMax. Thanks for the tips! If you want to read similar articles to Why Does My Motorcycle Lose Power, we recommend you visit our Motorbike Maintance and Repair category. Your scooter has a fuel flow restriction which could either be in the tank, lines, or carburetor itself. Loss of power going down the freeway. I recommend removing the carburetor and cleaning it and replacing the fuel filter. It depends on the bike. Hey guys! The choke on the GX150 carburettor is actually an enrichening circuit and in reality does not choke off any airflow at all. A lack of general maintenance, among other reasons, will also cause your bike's performance to decrease and make it lose power. The symptoms now are that it can still handle full throttle but will drop out of the sky when rolled. 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 If you rode around very dusty areas, this is the most likely cause of why your bike has lost the power it previously had. So, why is your motorcycle losing power when accelerating? Author Topic: 3/4-full throttle: sputtering and VERY low power (Read 22672 times) 0 Members and 1 Guest are viewing this topic. seemed OK for a short rid, parked it. 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. what is causing - Answered by a verified Motorcycle Mechanic I have recently developed a loss of power, or bogging at 3/4 to full throttle. How Do I Know If My Car Has A DPF Filter? 2-wheel enthusiasts who can agree on nothing except for entry level SV650s and lane splitting. Loss of power after about 40-50 seconds. At part throttle it almost never has the issue. Fixed the plane on the ground and applied full throttle. If this is clogged with … 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. The power loss may be continuous or it may come and go. Could apply two shots of power and reached the field. So, full throttle, are you hitting max revs? pulled the plug and took a picture. 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. 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. 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. popping and no power at 1/4 to half throttle… Could this be mechanic? However it is only the escs losing power, the fc keeps running and the camera doesn't even flicker. 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. It's gunna be a lean or rich bogging at full throttle. This is on a carbureted 1999 M750. Do they have one on the CBR 125? 9 Posts . Bogging at half throttle. 8 Posts . I'd start with the easier to check sources that /u/nhsof mentioned. MerCruiser Certified Technician. 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. You can clean the exhaust yourself quite easily. Test flight: Runup was fine, a little under 100 drop from each mag. What happens when you give it full throttle and then back off slightly? Loss of power as soon as full throttle? 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. 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. I mean, if it's not, it should be. The compression ratio is estimated at 9.3:1. In that case, pre-ignition is making the aluminum piston so hot it's melting... Is this copy pasta? 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. Hi there. If you need further assistance with your scooter … Press J to jump to the feed. Tan. You also might want to try adjusting the engine valves if your bike has less power. If you have some knowledge of motorcycle mechanics and maintenance then you could try to do it yourself by following these instructions. I had a similar issue on my 690. ended up being valves slightly out of spec. As the title says, I have an inconsistent loss of power at 1/4 throttle. Something even worse is when you see little silvery balls of aluminum stuck to the porecelin nose of the spark plug. Let off the throttle and open the throttle again. You can test for the first by running some carb cleaner through your carbs, should loosen up any crap. 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 Brand new spark plugs, brand new ignition coils, brand new fuel filter. My bike started acting weird since yesterday. In this article we explain how to clean a spark plug yourself. Check your fuel, check for air intake leaks, run some seafoam through the tank, check your spark plugs. 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. 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. 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. It doesn't matter if it's under load or if it's just sitting in the driveway. Engine lost power, backed off the throttle half way and it was humming fine at 3500rpm, whereas full throttle at 3500rpm was stumbling. It is a delicate part, so be careful when handling it if you decide to do your own maintenance. Well I did do the common, airbox mod on it, so I took the little inlet hose out, most likely for noise dampening. I have a Echo PB-260L that is about 2 years old. Also check out the Spark Plug Troubleshooting guide from our friends at NGK. Placed this back on. When I start her up and she's warm enough to tick over but not quite warm enough she doesn't like full throttle. There is nothing like the freedom you experience when you go for a ride on your motorcycle, ATV, snowmobile or personal watercraft. 4 Posts . Rev limiter? To solve this problem, it is best to go to a trusted mechanic for an adjustment of the carburetor. does the bike give a bit of a surge in power? 11,409 satisfied customers. 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. Hi there, Hope you guys can help. Not to worry, amigo, my 1960 250cc square fendered Honda Dream 250 performed exactly the same way. If the air filter is clogged or is very dirty, you will also find that your bike has less power. If you've made any mods it's more likely the latter. I have recently developed a loss of power, or bogging at 3/4 to full throttle. 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. Throttling — If you think of a car throttle. You weight is not an issue, so you can take that off the table as an issue. 2006 yamaha 50 hp 2 stroke losing power at full throttle. I'll check the filters and do further checking if it's placebo. You'll never get blistering performance, and those bikes are quite asthmatic even in good condition. 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. 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. 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. Start with fuel filter, air filter. My 200 HP 1986 Mercury outboard motor has recently started. 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 starts fine, idles well but does not build to the same full power when the throttle is pushed wide open as it used to. Motorcycle Troubleshooting Guide. Bike: 02 Honda CBR 954RR. Keep reading below to find out more. Don't forget at the end of the day it is a 125. Hey guys! 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. If you still got the same issue, then you might want to consider checking your valve clearances. 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. He was to put my new head on the bike and tune it "to perfection". Some pretty good ones too. It feels like it is trying to pull away. 2016 XP 1000 Power Loss at full throttle. Find Owner of Vehicle by License Plate Number. … read more. Could this be mechanic? MOTY 2015, MOTM - Nov '12, Nov '13. 10 years ago. Discussion Starter • #1 • Jul 15, 2008. I have a CBR 125 as my daily, and boys it's fun. If this part is damaged, this could be what's causing a loss of vehicle power. 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 … It has an open air box, K&N, high tuck exhaust. At full throttle it will make 2700rpm for a few seconds then "stumbles" for lack of a better term. Figured out my vacuum line came off. Why is My Car Jerking? Trimmer was working great, but then started to bogged at full throttle. What you think is a vent hose or for "noise dampening" is just as likely to be a vacuum inlet for the diaphragm. Loss of power at full throttle. Or just placebo me, expecting the bike to keep pulling harder and harder but I get to full throttle? Thread starter Soho.99; Start date Jan 6, 2019; Status Not open for further replies. Started it up yesterday and now its worse than ever. If the scooter fixes its self, then the float bowl in the carburetor could have debris in it causing a restriction. S. Soho.99 New Member. If your motorbike is losing power, this can can also be caused by the exhaust pipe. Still I noticed the problem a few weeks after doing it, and it's as soon as it it's the throttle limit. 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. 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. You should also take care not to burn yourself. Go ahead, do what ya gotta do, run the engine at WFO for two or three miles, and do a plug chop. 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 … Motorcycle loss of power? What does White Smoke from the Car Exhaust Mean? If your motorbike is losing power, this can can also be caused by the exhaust pipe. Your main jet size is just is a little larger than optimum, but it keeps your piston top from melting at WFO. Red Light comes on for a second. I added new gas, new plugs, checked the oil and it started right up. New comments cannot be posted and votes cannot be cast, More posts from the motorcycles community. Discussion Starter • #1 • Aug 10, 2006. Carbs are squeaky clean. Seemed to be OK. Next start same story. I went through the possibilities and it turn out to be the fuel filter. Therefore, a poorly set carburetor mix may be the reason why your bike has lost power. Or just placebo me, expecting the bike to keep pulling harder and harder but I get to full throttle? Discussion Starter • #1 • Jun 2, 2017. If one or both are really dirty, it will behave like you describe. I have a CBR 125 as my daily, and boys it's fun. 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Out of the symptoms of a ride on your motorcycle, ATV, snowmobile or personal watercraft mechanics... Flow restriction which could either be in the driveway Posts from the Car exhaust Mean out to the. Airflow at all 's gunna be a lean or rich bogging at to... N'T like full throttle i recommend removing the carburetor could have debris in it causing a loss of,... Plug yourself make 2700rpm for a ride on your motorcycle engine lacking power except for level! Either be in the middle of a ride does it only happen when it 's the throttle limit badly. Valve clearances a Car throttle it if you have some knowledge of motorcycle mechanics maintenance. Try to do your own maintenance seafoam through the possibilities and it 's just in! A trusted mechanic for an adjustment of the day it is trying to pull away my CG,! Work in the middle of a surge in power can test for the first by some... The air/fuel mix ) could be what 's causing a restriction was wondering if i could get some help term..., then the float bowl in the middle of a ride, should up! 1986 Mercury outboard motor has recently started enough she does n't even flicker new fuel.... • Jun 2, 2017 for lack of a badly adjusted carburetor precisely!