A two wheeled motor vehicle.

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5
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3answers
18k views

1994 Suzuki GSX600FR Katana - How do I know if motorcycle chain & sprocket need replacement?

I'm aware of how important they are, but have been coming up empty in my searches to determine if they're worn to the point of needing replacement. The service manual just says to inspect and replace ...
11
votes
2answers
753 views

How do I drain the brake fluid for a 1999 BMW K1200RS?

I need to drain the brake fluid for my 1999 BMW K1200RS with ABS in order to do some minor service on the Master Cylinder, but I don't have a service manual for the bike. How should I go about doing ...
4
votes
1answer
48 views

How do I pull error codes from my Kawasaki motorcycle?

I have an FI light on my Kawasaki motorcycle that is 2002 or newer. How do I get the error codes so I can troubleshoot it?
4
votes
2answers
115 views

Why does the bike idle lower after balancing carburetors?

I have just balanced my bike's carburetors (they were initially way out of sync) it idles lower and seems to smoke more when I rev it (smells rich). Returning it to it's previous out of sync setting ...
6
votes
1answer
40 views

2009 Aprilia RSV1000 - Piggy Back ECU, Should I get one?

I have an Aprilia Tuono, 2009. It seems to run lean after putting an Akrapovic exhaust on it. It makes exhaust popping sounds on deceleration. My boyfriend said I need a power commander on it to ...
3
votes
2answers
1k views

Cold engine works on three out of four cylinders

When my Honda CBR900’s engine is cold, it works only on three cylinders. When the engine begins to warm, all goes fine and all the cylinders begin to work. What can cause this?
7
votes
3answers
806 views

Is it okay to run aviation fuel (100 low-lead) in a dirt bike?

I'm wondering if it will be okay to run 100 octane low-lead aviation fuel in my 2007 RM250 motocross bike (two-stroke). Half of the people I've asked say yes, while the other half say no. Will it be ...
3
votes
1answer
36 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. ...
5
votes
1answer
37 views

Motorcycle petcock leaking around bolts to tank

My petcock is leaking I originally thought it was internal do I took it apart inspected all the gaskets and seals and have it a good cleaning after reassembly it was still leaking and after a better ...
3
votes
1answer
184 views

Rear wheel wobble

I recently took my '12 Yamaha R6 completely apart when I repainted it. When I put it back together I didn't realize but I'd forgotten a washer on the swingarm axle which was causing some movement of ...
3
votes
2answers
244 views

Who gets title if you sell a frame and an engine separately

I have a POS (Piece of S**t) salvage motorcycle I purchased cheap for a purpose which has now passed. I'm ready to get rid of it and there's a guy down the street that mentioned possibly wanting to ...
1
vote
1answer
67 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. ...
5
votes
1answer
110 views

2007 Hyosung GT250R not starting, some repairs have been made

Hoping to find some good advice on fixing my (above mentioned) motorcycle. I'll try to keep it brief but with as much details as I can. I had an issue with the bike and it sucked up some varnish from ...
4
votes
3answers
107 views

Is it possible to have a vehicle with no VIN?

I've recently purchased a Kawasaki GPZ500S (AKA EX500 or Ninja 500R) circa 1998. I can't seem to find the VIN which should be embedded into the right hand side of the steering head (it's got the frame ...
7
votes
1answer
71 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 ...
6
votes
1answer
747 views

Clutch dragging and making squeaking/grinding noise

My motorcycle clutch (Yamaha Diversion) has recently started dragging extremely badly; I need to rev-match up and down gears and shifting from neutral into first requires me to rev the engine, pull ...
2
votes
0answers
28 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 ...
3
votes
3answers
632 views

Derbi Senda 50cc - Low Compression, will not run properly

I have a Derbi Senda SM 50 2005 plate. It has a good spark, however, it's not reading any compression. It's had a new top end and gaskets! What could be wrong? Sometimes it starts when you bump ...
3
votes
1answer
370 views

Bottom piece of spark plug broke off in motorcycle engine

I was riding my 2005 RM125 dirt bike the other day when it bogged down all of a sudden. I noticed the spark plug had backed out of the head, thus causing the stall. I pulled the spark plug all the way ...
6
votes
1answer
430 views

Two-stroke dirt bike piston running into spark plug

Recently, I submitted a post on here regarding a broken ground electrode on the spark plug of my 2005 Suzuki RM125: Bottom piece of spark plug broke off in motorcycle engine Well, I found out what ...
1
vote
1answer
2k views

50cc Two Stroke Scooter/Motorcycle - Idle and start issues

This is my first motor-vehicle ever, a Simson s50 from 1976. Things seem to be running fine, but there are two problems I need to figure out: 1) The engine dies unless rev'ed constantly - eg at a ...
4
votes
1answer
315 views

Old gas in 2 cycle engine

I have a 2 stroked engine that sat for over 2 years. I drained the gas and can get it to turn over when I put starter fluid in the carb. it is blowing out a water substance from the muffler and cuts ...
7
votes
1answer
391 views

Does the air screw only affect the pilot jet?

I have a 2 stroke motorcycle, it's Kawasaki KR150. When I try to do some jetting on its carburetor (it's Keihin PWL26), I saw that there's an air screw. So now I've been wondering about this air ...
2
votes
1answer
2k views

What is the difference between a 2T oil and a 20-40 oil

I know a 2T oil is used in 2stroke bikes and its sometimes added with the fuel too. And a 20-40 oil also known as the engine oil is used to reduce the wear tear in the engine. I'm looking for a ...
5
votes
1answer
71 views

Motorcycle Starting Issue - no longer starting after attempting to jump with a car battery

I tried jump start my bike with my car battery because the motorcycle battery was really low and would not start. I mistakenly touched both ends of the jump leads together and cause a big spark, ...
7
votes
3answers
2k views

How might I fix a dent in a Honda Rebel fuel tank?

In a silly move during an engine overhaul, I dropped my Honda Rebel's fuel tank and put a dent in the top side. Is it possible to pull this dent out? I've heard there is a method using heat and ice ...
2
votes
0answers
170 views

2008 Honda Rebel 250 idle problem [closed]

I have a Honda Rebel and it's been running great for the last year. It does have about 8000 miles on it but I haven't had any serious issues. Lately, I noticed the idle was higher than normal. It ...
2
votes
2answers
213 views

Do I need to reprogram ECU when adding custom Air filter

I was thinking of replacing the air filter of a bike into a custom free flow filter. I understand that I have to mod the exhaust to free flow as well to accompany the increase in exhaust due to the ...
13
votes
1answer
3k views

What is happening when a two-stroke engine is said to be “four-stroking”?

Many years ago, I was involved in a hobby of building and flying model aircraft. The aircraft used alcohol-fueled 2-stroke engines with glow plug ignitions. When these engines ran rich (and always at ...
1
vote
1answer
346 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.
0
votes
3answers
520 views

Headlight problem in my honda 125cc bike

I'm having a headlight problem on my Honda 125cc bike. My problem is that I don't have a battery on my bike and every time I connect a bulb, it blows up within 5 mins. As of this moment I can't afford ...
2
votes
1answer
219 views

Swapping the carbs on my ducati m600

The mixer screws are totally seized on the carbs of my 1994 ducati m600, I have found a good set of carbs from a 1997 m600 but will they fit my bike?
3
votes
1answer
40 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 ...
1
vote
2answers
37 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 ...
2
votes
2answers
591 views

Restoring a 1985 Yamaha AG200

I was given a bike (1985 Yamaha AG200) and was dedicated to get the thing running so I can learn a bit more about how motors work. Its been sitting in a shed for about 20 years and the rats have got ...
4
votes
1answer
88 views

Honda XR650l first ride after winterization

Before winter I had the oil changed, filled the gas tank and added the recommended amount of Sta-bil fuel stabilizer. Then rode around for about ten minutes then switched the petcock to off and ran ...
2
votes
1answer
61 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 ...
4
votes
1answer
153 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?
5
votes
3answers
261 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 ...
2
votes
3answers
5k views

Tick Tick sound from a Royal Enfield Classic 350 at idel

I own a Royal Enfield Classic 350. At idle, the engine starts to produce a TICK TICK sound. However it vanishes when the rpm rises and when riding the motorcycle. This question is a very frequently ...
5
votes
2answers
685 views

Why are gears designed in this pattern in motorcycles? [duplicate]

On motorcycles with manual transmissions, the shifting gears goes (down to up) like this: 1st Gear (all down) Neutral (half up) 2nd (full up) 3rd (so on) What is the logic behind this? Wouldn't ...
2
votes
2answers
3k views

Motorcycle engine running a bit hot?

For the past few rides, I think my 2007 Ninja 250 has been running hotter than before. At least, I think it feels hotter through the seat, but the oil temperature gauge seems to be pointing pretty ...
11
votes
4answers
3k views

Gasoline is dripping out of a rubber tube outputting on the bottom of my motorcycle - is this normal, or is it a problem?

What bike? A BMW 650, 1996 model. What's the problem? I noticed a slow, but steady, drip of gasoline from one of two rubber tubes that output to the bottom of the bike. I think the other rubber ...
3
votes
1answer
2k views

Motorcycle Front Forks: Fork tube stuck in bottom pipe - clunking sound when trying to remove

I'm rebuilding the forks on my CB400 project bike [ turning into a street tracker ;) ] The process from the manual is pretty straight forward: 1) Remove the front fork bolts and drain oil 2) With ...
2
votes
1answer
40 views

Is there a source assessing repairability of motorbikes and cars?

For phones you can find ratings based on ease and cost of repairability (assuming you do everything yourself). Is there such a source for choosing a motorbike or car that you want to maintain yourself ...
2
votes
1answer
65 views

1987 Yamaha fz700 handlebar lock

On my ignition there are a couple positions, on, off, lock, and p. I assumed the lock was for the handle bar lock, but it doesn't lock when I switch it to that, when I switch it to P though it ...
9
votes
2answers
650 views

Change in exhaust note after extreme backfires--what did I break?

I had quite a morning with my 1986 BMW K75 this weekend. The plan was to ride the bike to a friends house to store it for the winter. The weather was pretty cold on this particular morning, perhaps ...
5
votes
3answers
281 views

What is an inverted triangle piston skirt?

The recently launched Suzuki GSXR150 boasts an inverted triangle piston skirt. From what I have been told, it seems to be MotoGP technology which has been stripped down to suit a 150cc bike. Kindly ...
3
votes
1answer
135 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 ...
14
votes
2answers
15k views

Why is my motorcycle losing power when accelerating?

I ride a Honda Rebel 250 motorcycle and over the past few days I find that the bike is losing power when accelerating fast. When I twist the throttle to accelerate quickly (in any gear) I hear the ...