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Questions tagged [motorcycle]

A self propelled two wheeled motor vehicle with an engine larger than 50cc's.

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8 views

150cc chinease dirt bike powerloss bad backfire and no idle

I have a 150cc Chinese dirt bike. About a month ago it started to bog a lot. It could only start on choke, so I took apart the carburetor, cleaned it and put it back together. The problem still there. ...
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1answer
26 views

Rear brake not working motorcycle

So I changed the brake fluid on both brakes on my motorcycle and now the rear just slips. I can feel the break 'grab' in the pedal but the brake disc just slips right through. Now I did end up getting ...
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1answer
15 views

Damaged bearing seal

I've damaged the crankshaft bearing seal while removing the crankshaft seal with a pick. See the pic, the worst part is the ~1 mm2 flap near the edge. What are the consequences of this and how can I ...
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28 views

My motorcycle is making whirrng grinding noise

My Suzuki Gixxer 155 is making a weird grinding whirring noise. The noise is there when the clutch is open. As soon as I pull the clutch the noise goes away and there is no noise in neutral too or ...
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21 views

Motorcycle frame slider bolt breaking off too often

I use Puig R12 frame sliders on my Yamaha R3 motorcycle. The frame sliders are held in place by 12.9 grade stainless steel bolts (https://www.boltdepot.com/fastener-information/materials-and-grades/...
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8 views

Suzuki TU250X motorcycle only cranks when engine turned over by pushing in gear (electronic ignition)

I have a 2000 Suzuki TU250x. It's had a intermittent problem using the electronic ignition to start the bike. Turn the key, hold in the clutch, lift kickstand, click the fuel pump relay switch, hear ...
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32 views

Honda CBR150 Race Bike Engine Problems

I have a Honda CBR150 race bike with some engine problems. The bike struggles to start, think of the way a carburetor bike would struggle to start if it hasn't been run in a long time, but it does it ...
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2answers
36 views

My rear disc brake became slippery

Yesterday i Lubed my chain and Sprocket. On the other side there was rear brake disc. So while spraying on chain and sprocket some oil through spray went on to disc. Now after that brake not working. ...
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23 views

Troubleshooting a Fuel Pump

I took my 2003 Honda RC51 into the dealership because I couldn't figure out why it wasn't starting, and they say the fuel pump is broken. They say it's getting power just not sending fuel. Of course ...
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2answers
28 views

2007 Honda Shadow Aero 750

I have a 2007 Honda Shadow Aero 750. I bought it in 2014. (My first motorcycle) I have intentionally run it till I had to switch to reserve to check how many miles I can go on a full tank. The first ...
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2answers
38 views

Getting the clutch back together

I'm having trouble getting the clutch back together on my DR650. I'm following this guide. Everything is assembled back, but the clutch lever feels light when being pulled in and doesn't return after....
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1answer
23 views

Can I use a yoshimura exhaust in any bike?

I have an old Triumph motorcycle 955i that im customising. I want to change the exhaust and use a second hand yoshimura cheap one Is that possible? Or the exhaust needs to handle different pressure ...
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Trouble Starting Scooter after Replacing Carbeurator

Background Recently my scooter was having trouble getting up to full speed and was jerking slightly, but only when I gave it a lot of gas or going above around 35 miles an hour. After some research, ...
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Jetting a 1985 Yamaha Maxim XJ700x for straight pipes

I have a 1985 Yamaha Maxim XJ700x. I'm going to be putting on straight pipes in place of the mufflers. I know I'm going to have to jet the carbs but do I need to change the needle jets too or just the ...
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1answer
21 views

Left motorcycle lights on all night; won't turn on

I got a 2017 Yamaha FZ07. I accidentally left the key on came back to my bike the next day and it’s completely dead tried to jump start got nothing tried push starting it started but when i slowed ...
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Why would this happen:

If anybody could help me understand this behavior, I'd be grateful: 2003 R1 5PW, Fuel-injected, has an alarm/immobilizer fitted, doesn't report any fault codes: Motorcycle would occasionally (three ...
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2answers
19 views

Need Help Diagnosing and Fixing my Kawasaki Ninja

First time poster here. I have a 2010 Kawasaki Ninja 250 - this is a bit of a story and I try and keep it short. A couple weeks ago my bike was having trouble - when I would rev the engine in low ...
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1answer
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2005 suzuki gsxr 600

My bike simply won't start after I replaced the side stand relay, the economy, check all the fuses. It turns over but don't start all my relay works. My fuel pump works. But when I turn the key the ...
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12 views

Suzuki SD 110 cc

bike almost 9 years old, replaced carburetor once so it is 5 years working perfect. few days ago i changed gas filter because it was looking too sluggy. (petrol filter that not actually installed by ...
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18 views

2004 97cc Jonny pagsta mini chopper

Ok. My motorcycle wouldn't start today so I changed all the fluids and cleaned out the carb and jets set the air flow and idle screws back to what they were set to and the bike started and actually ...
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1answer
51 views

Milky Motorcycle Engine Oil

Good day, I recently replaced the engine oil and it was milky. Water mixed with the oil. Is there any sense in the following process? Drain all the milky oil. Fill the engine with WD-40. Spin the ...
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1answer
34 views

Busting spark plugs every hour

What is happening when a vehicle keeps busting a spark plug every time you put in a new one?
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2answers
31 views

Can spongy brakes lead to skidding?

I recently flushed my non-ABS motorcycle rear brake line with new fluid using a little hand vacuum pump, but accidentally initially let the brake fluid drop below the "low" marker on the master ...
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1answer
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Honda SOHC spark but no ignition even with starter fluid

i'm restoring an Honda SOHC engine 250, i fixed the full electrical system and i can see the spark testing it near the engine. (Not sure if gap is correct of the new spark plug), there is compression ...
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33 views

right turn stall, starving for fuel?

I have a 1998 96" s&s with a super e carb - runs great straight up and leaning left turns but when I make a right hand turn it seems to starve for fuel and begins to stall. the turns are leaning, ...
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1answer
24 views

can I use a heavier oil in front forks

I have a 1982 Honda gl500 silverwing and last year I had the front fork seals replaced. They lasted about a month and the left one started leaking again. Now the local repair shops tell me that 1. ...
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32 views

Slipping clutch on my Yahama YZF600R 2002 34,000km

I just bought my Yamaha YZF600r about 2 months ago and at first I noticed first and sec were slipping and last night when I went for a ride I lost all power and had to pull over. Bike will start no ...
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1answer
27 views

2014 Ninja 300 idle/throttle issue

Back Story Recently my bike had an issue twice while riding that the throttle seemed like it was sticking. I'd be accelerating and when I let off the throttle, it would continue to accelerate. It ...
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1answer
31 views

How to set cam timing from scratch for Honda RFVC, DOHC, four stroke?

I'm doing a full engine rebuild on an Honda GB250 clubman, RFVC & DOHC four stroke. I would like to know how to set cam timing from scratch?
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1answer
38 views

Motorcycle chain maintenance

Seen few videos on you tube where they are using either kerosene or diesel as chain cleaner.It is safe on O rings?Also they are lubricating chain with gear oil of 90 grade. Will it serve the purpose?
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1answer
52 views

What wrench sizes are needed to maintain a Skyteam ST-50 monkey bike

I've made the nutty decision to ride a tiny motorcycle across a foreign country and I'm trying to get a tool kit together. The bike is a Honda Z-50 mini-trail knock off called a Skyteam ST-50 (aka ...
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22 views

Fully charged battery. Full tank of gas but the motorcycle does nothing, why?

My motorcycle doesn't do anything. Theres no power going to it at all even with a fully charged and connected battery? Someone please help me to figure out why? Ive checked all fuses, connections and ...
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2answers
44 views

What is wrong with my 1997 Honda CBR 600 F3? No signs of life

So obviously in the title I have a 1997 Honda CBR 600 F3. As of right now it is showing no signs of life. I just replaced the battery and tested it right before I wrote this. It reads 12.75 volts. ...
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1answer
40 views

Oil on front disc / rotor and tire

I have a 2009 Triumph Tiger 1050 that gets ridden very rarely. Took it out this morning and the front brakes felt very ineffective - looked at the wheel and it seemed like there was a bit of oil on ...
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33 views

When should a 4 pin starter solenoid relay switch click?

When should a 4 pin starter solenoid relay switch with 4 pin (clutch switch, reg/rec, ignition key, start button) click? Should it click after turning on the keys, or after turning on the keys and ...
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0answers
26 views

Kawasaki EX400 2012 cold stalling

I got a efi motocycle that stalls when cold at stop lights. It only happens if 4-5k rpm was reached before pulling the clutch. When it doesn't stall I notice very low rpm. Cold starts are iffy. It ...
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2answers
64 views

Dark thing keeps flining off the motorcycle chain

I've lubed a chain on my motorcycle a few days ago, but there's a dark thing keeps flinging all over the swingarm. I'm wondering what it might be? If it's the chain lube flinging all over, then why it ...
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Can I use a DC ignition coil for my motorcycle without damaging anything?

Last night I followed this guide I found on the internet http://waynescyclegarage.mysite.com/custom.html showing you how to rewire a Honda SL engine so that it can run without a battery.. and I got it ...
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1answer
27 views

Aluminum parts on motorcycle oxidized after washing

I washed my used motorcycle the first time since I've bought it this summer, and soon after noticed that oxidation appeared on some aluminum parts. It's definitely wasn't there before and surely this ...
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1answer
94 views

Motorcycle, cylinder 3, not firing

Motorcycle - 1981 honda cb750c dohc 4 carbs keihin. Cylinder 3 is not firing, motorcycle starts up fine with 1,2 and 4 firing. Just cleaned carbs by hand, did not use ultrasonic cleaner. Spark plug ...
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19 views

03 Sportster bike will start up and run but when you pull out the choke it stalls

My bike choke does not work you can start it without the choke but soon as you put the choke on it stalls out
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Bike still stuttering? It's a 92 gsxr 1100 I rebuilt the engine and carbs! All done IAW manuals and OEM specs!

I need some help with this matter of the bike stuttering? New intake boots and seals! Very very clean carbs! Also all new seals! No leaks? I'm running filter pods and stage 3 jet kit with 4 into 1 ...
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1answer
35 views

Can I bypass solenoid clutch switch by grounding the pin directly with a wire to the chassis/frame?

My solenoid switch has 4 pin for an Honda motorbike. One of the primary pin to be energized for the solenoid to click is the clutch switch. My question is: can I connect the pin with a wire that i'm ...
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2answers
42 views

Motorcycle restoration steps

I have an inherited an old motorcycle. From what I can tell, an early 70's Yamaha 2 stroke. The gas has varnished, and the oil has been sitting for 40+ years. It has been sitting in a closed area, so ...
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1answer
30 views

rear brake performance motorcycle

Hi my bike has nissin brake calipers. The pads have 12,000 miles on and are still have plenty of life left in them (not down to the indicator yet). Now the rear brake always feels spongy, rubbish and ...
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1answer
27 views

Brakes on Honda XR125L make high pitched noise

I just replaced the brake pads on my front brakes of my motorcycle. The reason I did is because they made a squeeky noise. Not the typical brakepadmetal-on-metal-disk noise, but more similar to the ...
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1answer
38 views

1995 600r ninja boggs out during 4th -5th gear WOT between 8-10,000rpm

in 4th and 5th gear Wide Open Throttle the bike bogs out between 8-10 thousand rpm. I roll off the throttle...then slowly roll it back on to get through the flat spot. If i ring the gears out WOT it ...
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2answers
98 views

Will not using a new motorcycle damage it?

I bought a new motorcycle in may. I rode it home (30 km / 18 mi) and stopped it. I was planning to break in the engine in a couple of days but, unfortunately, due to some unforeseen health ...
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1answer
24 views

2006 Suzuki boulevard s40 carburetor lines

I don’t know where the hose goes, and I would like a diagram to follow. Then, my bike should start (hopefully). Thanks. I have no idea where they go. I didn’t start the work, I just have to finish it; ...
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1answer
46 views

Backfire on a 1996 CBR 900RR with new spark plugs

I have a 1996 CBR 900RR and have put new spark plugs in and now it backfires when I let off the throttle and the motor is winding down. It also does it when in neutral and seems to be revving high ...