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

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3
votes
3answers
150 views

While raising the accelerator suddenly my bike's speed goes down

While driving, I faced some problem in my bike. when I raise the accelerator suddenly my bike's speed goes down. Anyone knows what is the problem?. I'm using yamaha ss 125 cc bike.
3
votes
1answer
43 views

Motorcycle front brake's are weak

A few weeks ago I was in a motorcycle accident and my handlebar had bent and so had my old brake lever. A buddy of mine who's quite good with motorcycle's bent the bar back and changed the brake lever....
7
votes
3answers
330 views

Single-cylinder engine - no camshaft position sensor?

I'm doing some research on the Honda CRF450. This is a single-cylinder engine. I'm interested in the fuel-injected models (not the older carbureted versions). As far as I can tell, this engine doesn'...
2
votes
2answers
140 views

Replacing Spark Plug with Laser Iridium NGK Spark Plug

I have 2012 KTM Duke 125 at 10 000 miles (16k kilometers). I am the third owner of bike for 2 years. Whenever i twist the throttle fastly, motorcycle is chocked up. So i thought the problem could be ...
3
votes
1answer
56 views

How to remove front forks on motorcycle

I've got my motorcycle up in the air about to pull the frame up off the engine but I need to remove one last thing. I got everything taken apart except this center bolt holding the front forks on. ...
2
votes
2answers
44 views

Yamaha Virago XV125 registration year

I have a Yamaha Virago XV125 on a Y plate, this gives the year 2001, but the V5C says the date of first reg is 2000 and DVSA say that it's 2001, who do I trust for this?? (I'm sure Yamaha stopped ...
3
votes
0answers
42 views

Terminator 2 1990 Harley Davidson Fatboy FLSTF technical information [closed]

I am doing a project for class about the Harley Davidson Fatboy, and I need to find the values for the spring constant of the bike used in Terminator 2, and whether or not it used a custom suspension. ...
4
votes
1answer
514 views

Why are most motorcycles 5 speed than 6 speed?

I have a Honda Trigger motorcycle. I have seen most of the motorcycles even like Karizma ZMR having 5 gears. What would be the reason to have just 5 gears even for 223 cc motorcycles?
3
votes
1answer
52 views

Winter is here, what measures should be taken to protect a motorcycle?

After a mere two months of owning a motorcycle, it's already winter and I'd like to know how best to prepare for the inevitable ice/snow/cold. Other than basic cleaning and lubrication, are any other ...
2
votes
1answer
169 views

Engine oil reducing almost to half

I recently changed engine oil of my Apache rtr 160. I used otul 5100 15W50. Later I started experiencing vibrations, a lot of vibrations. I checked on the engine oil. The quantity is reduced to half. ...
3
votes
1answer
56 views

2000 Yamaha R1 Quick Action Throttle

I've 2000 Yamaha R1 that I'm racing in my local Clubman's Championship. At the moment the throttle travel is very long, ie. half a turn or more from fully closed to fully open. I want to change this ...
3
votes
1answer
104 views

Suzuki vl 250 wont start

I have a Suzuki vl250. It's been running great until last weekend I rode it home from work turned it off and the Mrs decided she wanted to go for a ride only problem is bike wont start! Since then I ...
4
votes
2answers
407 views

Is there a key code with my Kawasaki

I hear that there is a key code for my 2006 Kawasaki Vulcan 900 LT that can be given to a dealer who can then cut a new key for my bike if ever necessary. Now it is. But where do I find the key code?? ...
5
votes
3answers
291 views

Hyosung GT250R Leaking petrol

Motorcyle 2006 Hyosung GT250R Syptoms Leaking lots of petrol when engine is on Info Hasn't been ridden in about 10 months. Has been stored outside with cover, leaning on it's stand. I've ...
3
votes
0answers
73 views

Problems with starting my Motorcycle [closed]

I have a Honda 2003 VTX 1300 S Retro that will not start without a jump. I just purchased a new battery on line (Chinese) for this type of bike charged it and still getting the same results as before. ...
1
vote
1answer
105 views

How to check spark plugs on a Yamaha R6

I was hit a few weeks ago and have been trying to get my motorcycle fixed ever since. 2012 Yamaha R6. I replaced the tank among other things and trying to start it it sounds like it's sucking air. ...
3
votes
1answer
167 views

Big motorcycles at stop lights; why do they keep blipping the throttle?

We've all been near a big Harley at a stop light, where the rider keeps blipping the throttle. I've always wondered why they do this. Is it because those big pistons don't idle very well, and if you ...
2
votes
2answers
131 views

Is there any protective sealant or bladder within a motorcycle tank?

I am learning metal work and will one day build my own motor cycle tank. Do these have any internal sealing or bladder?
3
votes
1answer
233 views

1995 Yamaha virago 535 Fuel pump problem

On my 1995 Yamaha virago 535, why does the fuel pump click 10 or so times before trying to start? I've replaced the fuel pump and fuel pump relay. It still has the clicking issue and will not start.
9
votes
5answers
1k views

How to become a self-taught amateur mechanic?

I'm a computer systems engineer (we did a lot of embedded systems and some electrical at university) and I own a Suzuki SV650S. I am considering doing several upgrades to it (e.g. replacing the front ...
2
votes
0answers
38 views

Fresh battery, no lights on 1979 Honda CB125 [closed]

I have a 1979 Honda CB125 that was running consistently about 2 years ago. It then sat for two years and the battery was corroded so I replaced it. I've made sure the battery is charged (I have a ...
2
votes
1answer
77 views

Tuning an ancient carbureted Honda motorcycle

I was in an accident recently. Tboned by a minivan at an intersection. Totaled my nice bike. My buddy gave me an old rust bucket he had laying around just to get me to work for a few weeks until I ...
1
vote
2answers
194 views

Motorcycle Headlight Dies After Engine Start

I am having a weird problem with my headlamp on my 1983 Honda FT500. When I go out to start it in the morning, insert my key and turn it (engine still not started tho), the headlamp comes on as one ...
6
votes
3answers
469 views

Kawasaki EX650 - What causes a stator to burn out?

My motorcycle recently required a new stator (plus a new regulator rectifier and battery) because the stator burnt out and fried everything. What are the typical causes of a burnt-out stator? Does ...
7
votes
3answers
275 views

Can a valve suddenly break in half? Versys 650 destroyed engine

this week-end, I had to disassemble an engine from a kawasaki versys 650 (early). The bike lost power while making ugly metal sounds. It never started again. RIP. context: 108.000km, mostly higway ...
3
votes
6answers
874 views

Why do they called motor bike instead of engine bike?

In Bikes, major part plays by 4 stroke petrol engine, then why did they named as motor bike or cycle instead of engine bike?
3
votes
1answer
87 views

Requirements to use 55W Bi-xenon 6000k projector on yamaha r15 v 2.0

I have a problem with my vehicle headlights. Now I'm using a 35W 8000k projector for my bike. This is not having much light output as I wish. I'm really interested to see powerful light output from ...
5
votes
0answers
64 views

2011 Hyosung GT250R - Stalls and Stutters at Lights [closed]

I have owned a 2011 EFI Hyosung GT250R for about a month. I haven't had any problems. Today, I was riding in 2nd gear and I shifted down to 1st to make a quick stop, and once stopped the idle speed ...
4
votes
2answers
77 views

Engine rev in motorcycle

I somewhere read that for a good launch we should hold engine revs at peak torque, not peak horsepower. What does "hold engine revs at peak torque, not peak horsepower" means? How can I hold engine ...
2
votes
0answers
51 views

2000 Kawasaki Vulcan Vulcan 800 Throttle Cuts at High Speeds (85mph+) [closed]

The bike starts fine but it coughs a lot when giving throttle in first gear. Runs great 2nd - 5th but when pushing around 85 mph or more the acceleration quits. The engine is still running but feels ...
2
votes
1answer
1k views

What is the purpose of a smog block-off plate?

What exactly is the purpose of a smog block-off plate? What does it 'block-off'? How is it installed? And what are the benefits/detriments of installing such plates? In my particular case, I ask, ...
5
votes
1answer
131 views

Honda Shadow VT750 louder exhaust noise, low power

Recently, my motorcycle got smashed by my girlfriend (who was driving behind me) in the rear. As a result of the impact, I got propelled into the rear of the car in front of me. Both fenders are ...
2
votes
3answers
1k views

TVS Apache RTR 160 - What Grade Engine Oil Should I Use?

I bought a TVS Apache RTR 160 second hand. I want to know what grade engine oil should i use for my bike. I was suggested to use 15W50. Is that a good choice. The bike has done almost 65000Kms.
2
votes
1answer
99 views

GSF400 Bandit carburetor model or type,

I have Suzuki Bandit GSF400 model '92. May I know the type of carb do I have on it? I am trying to do some replacement on jets but I need sizes.
14
votes
2answers
385 views

'00 Honda CBR929RR - Unknown issue, help!

Sorry for the ambiguity here.. I'm not sure what the issue is with my bike. I have a bunch of symptoms and my hypothesis is that it's a cascading failure and I'm just seeing a bunch of effects down ...
6
votes
2answers
75 views

Rain tyres for motorcyles

I have recently started driving a motorcycle to work (60 km/day). I have a Honda XR125L. Today I had an accident. I was driving at 10-20 mph and wanted to break for cars that were standing still. I ...
5
votes
1answer
125 views

When should I perform a valve head adjustment?

My 2012 Yamaha R6 has about 12000 miles on it. During that times I've had a couple rough accidents and I think the combination of those two factors it may be a good idea to check my valve clearance ...
5
votes
1answer
83 views

What does an EXUP servo and subsequently EXUP eliminator plug actually do?

This question relates to my 2012 Yamaha R6. I removed the kickstand safety actuator because it was bugging me, I found it useless, and my habit is often to lift the kickstand when I start moving ...
6
votes
1answer
1k views

Will any starter relay / solenoid do? For my motorcycle

I'm looking for a starter relay / solenoid for my 2004 Yamaha TT600RE. That part seems to be scarce for this bike. How interchangeable are solenoids for motorcycles? Will any Yamaha 600cc solenoid ...
2
votes
1answer
764 views

2015 hawk 250cc enduro motorcycle

While riding down the street, our motorcycle just died. Tried to restart it and it sounded like it wasn't firing. We changed the plug and ignition coil and still not firing. What should we do now?
5
votes
2answers
369 views

Why do most mass-production motorcycles have their intakes facing backwards?

Almost every motorcycle I have seen has its air intake mounted such that it is sucking in air from the direction opposing travel. According to fluid dynamics, if the intake is made to face forwards, ...
2
votes
1answer
194 views

How to learn motorcycle maintenance theory

I'm a motorcycle novice and want to learn how to maintain a bike and fix problems that may arise. I've found a few great videos that have elucidated some basics: How a motorcycle engine works: https:...
3
votes
1answer
244 views

How to find model year of this Honda Shadow bike 'NC34-1002157'?

Recently, I was about buying nice Honda Shadow but the seller didn't know the model year of his bike. I saw many 17-digit vin numbers and I can decode it, but 11-digit vin is difficult and I don't ...
7
votes
2answers
2k views

Motorcycle transmission occasionally pops out of gear

I'm having an issue where the transmission will occasionally downshift by itself during a fast acceleration. I have a 2005 Suzuki Vstrom 650 and it's been a great bike so far. At pretty high revs, 9k-...
3
votes
1answer
89 views

Hauling a motorcycle cross country — more or less wrong ways to do it.

I need to haul a 425 lb KLR650 motorcycle from Hoboken NJ to Oakland CA. I'm on a budget so I'd like to do this as cheap as possible (under $200 is great, maybe $500 max). I have a 1996 B4V VW TDI ...
4
votes
2answers
630 views

Parking a motorcycle with hot engine

I have a question regarding my motorcycle (Yamaha FZ8 - 4Zylinder 800cc). At the weeksend I was driving through a town. It was very hot outside and I parked the bike. The coolingwater-temperature was ...
5
votes
2answers
646 views

Reboring a cylinder: compression ratio of new piston

I'm going to have the cylinder of my 2004 TT600RE motorcycle rebored (because it's damaged, not to increase power). The manual says the piston size is 95mm and the compression ratio is 8.5 : 1. I'm ...
7
votes
1answer
86 views

Clutch pulls in too easy after reassebling the clutch basket, what did I did wrong?

I have a 1982 Kawasaki KZ550C LTD. When I got the bike one of the bearings on the starter assembly was worn out and would slip. So I pulled the engine and had to tear it down in order to get to the ...
3
votes
0answers
48 views

Help identify round diodes - need a replacements [closed]

Few diodes died in three phase rectifier circuit on a motorbike. I can't find any suitable replacement online since I can't understand what kind of packaging is it. They round like a round pill. 7mm ...
4
votes
1answer
2k views

Why is this motorcycle burning oil, and how can I get it to stop?

I have a newbie question for you. I'm considering buying a 2004 Yamaha TTR600RE- a single-cylinder, air-cooled dirt-focused dual-sport bike. It's perfectly set up for adventure touring, which is what ...