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

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2
votes
1answer
23 views

I3 engine balance/power delivery

I'm trying to learn more about inline 3 engine balance and engine balance in general (motorcycles)... I3 interests me for a few reasons but i want to further understand how they work. L4 and ...
6
votes
2answers
61 views

Why aren't rotary/Wankel engines used more in motorcycles?

The strengths of the rotary/Wankel engine seem perfectly suited for the needs of a motorcycle (small, lightweight, smooth, high revving). The main disadvantage (lousy fuel economy) also tends to be ...
3
votes
2answers
26 views

Yamaha Gladiator SS 125 model motorcycle engine problem

I have Yamaha Gladiator SS 125 model motorcycle. After repairing the engine there has been one problem in my engine. It is that the mobil from the engine flows towards the air filter and then the same ...
-2
votes
1answer
36 views

which lane to turn into? [on hold]

I have a question for left/right turn. Please excuse me if it is already been asked. When you are turning left into a 2-lane road from a 2-lane road, we should stick to the lane which we are in. ...
8
votes
3answers
91 views

How over-square can you go?

I'm wondering what's the limit for how over-square a motorcycle engine can be... I know all sport bikes I looked at had just under 25 m/s piston speed regardless of the stroke/rpm... So I'm ...
3
votes
3answers
66 views

LED Blinkers - Burning out on 1976 Triumph Bonneville

I have a 1976 Triumph Bonneville and recently replaced the garbage LED chips inside the eBay signal lights with brighter Cree LED chips. I bench tested the circuit shown below with a 12v bench supply ...
1
vote
1answer
45 views

I need to replace an engine in my heritage

My 2002 heritage has over 48,000 miles on it and is making a lot of noise so I would like to replace it with a 2003 road king motor. Would it line up and bolt in without any trouble.
7
votes
1answer
29 views

Why is my shifter lever extremely stiff or hard to shift gears?

My Yamaha 85 750 maxim I shifter is extremely stiff or hard to shift?but when I pulled off the casing that it passes thru or even loosened the bolts to the caseing it shifted normally?
9
votes
3answers
7k views

2001 Suzuki Katana 600 motorcycle won't start

A few months ago I bought a used 2001 Suzuki Katana 600 with about 11,000 miles on it. I rode it without any issues for the first month or so. After that I started having occasional issues with ...
5
votes
2answers
2k views

High altitude adjusment for carb 4stroke. (honda xr650l)

Hi I am having some problems with my honda xr650l (1995). During acceleration I experience a sort of stuttering loss in power. Almost the same feeling as runnning out of gas in the main tank. but the ...
3
votes
0answers
27 views

2001 WR426F Leaks a bit of oil out of the breather tube, is it normal?

I have a WR426F that after a bit of trailing has a small (couple drops) puddle of oil underneath it after sitting a bit. It seems to be coming from the breather tube, is that normal? I also have a ...
2
votes
1answer
20 views

Activa engine noise

My neighbor and I purchased an Activa 3g at the same time. When my bike is in idle (just after immediate start) as well in running condition, it sounds little bigger/ rough noisy like dub dub... Also, ...
4
votes
1answer
22 views

Motorcycle won't start without jumping the solenoid

If my bike wont start but does start when I use the wrench on the solenoid trick; does that mean I need to replace the solenoid? I'm having trouble working this out as I'm new to mechanics and trying ...
2
votes
1answer
13 views

Motorcycle front disc brake scraping sound

Had my tyres changed on my CBF 125, last week. Since then, I've had issues with braking. I took the bike back to them and taking the wheel off (to change the tyre as it was already going flat) and ...
6
votes
3answers
1k views

Why don't motorbikes have chain covers?

I notice that except for small commuter bikes and older bikes (before the 80s), hardly any of the larger and/or sportier bikes have covers to protect their chains: . They seem quite practical, and ...
3
votes
2answers
25 views

Hero passion pro India Bike is only get started on choke

i am having hero passion pro new model in the morning when i start my bike with kick i have on the choke the bike started without no hesitation but when i pull of the choke after 15 seconds and ...
9
votes
1answer
2k 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 ...
4
votes
2answers
40 views

What is the choke on off position in passion xpro?

Hi am greatly confused with the on/off position of choke in Hero Passion XPro (2014 model). I am able to set it in three different positions Vertical (the choke switch pointing downwards) (image ...
3
votes
0answers
64 views

Honda Hornet engine stalls

I have a Honda Hornet (CB600F) PC41 from 2007. It's the first model with EFI. The bike has an error that we can detect by observing the blinking pattern of the FI light: 2 long and 9 short flashes. ...
5
votes
3answers
351 views

GSXR 1000 K5 turns off on hot days

My name is Joel from Sydney and I'm trying to diagnose a strange problem on my bike. Apologies if this is the wrong forum to be asking this question I'm new to this forum. Bike: GSXR K5 1000 Mods: ...
2
votes
1answer
24 views

Bike making squeaking sound while upshifting

I've put 7281 Kms on the bike so far and recently I've encountered a problem. While upshifting using the clutch, the bike makes a squeaking sound. The sound appears when I release the clutch. This ...
3
votes
1answer
37 views

Motorcycle Lithium Battery - Potential Parasitic Drain

I have a track racing motorcycle with a lithium battery, the battery has gone flat on two separate occasions as a result of standing for a period of time. The first time the bike was standing for ...
7
votes
1answer
102 views

DIY: Prepare Virago for both tall and short riders

Background I currently ride a Honda Africa Twin and my wife rides a stock Virago 535, just like this: I will soon sell my Africa Twin and we'll keep only the Virago, but I'm not very familiar with ...
1
vote
0answers
22 views

clutch problems

Sat for a very long time (8 or 10 minutes) in gear with clutch depressed due to traffic problem. Once I got back into motion, my clutch seemed to have been blown. After the bike cooling down (half ...
6
votes
1answer
34 views

Fuel injection modification for increased displacement

I am working on a 2 cylinder, 250 cc motorcycle which I am increasing the displacement to about 350 cc but I have no way of remapping the ECU. Is it possible to get a satisfactory result by changing ...
3
votes
2answers
43 views

How to refurbish an old motorcycle?

I've picked up an old motorcycle for basically nothing that's been sitting for a while and I'd like to refurbish it and put it in good working condition. It's a fine bike, but has been neglected a ...
6
votes
2answers
45 views

Does Coil rewinding have a negative impact with the existing system?

I have a question towards the rewinding of a coil. Here is the tech spec of the bike:- Battery : 9 Ah, 12 V Generator : 12V, 100 W Fuse: 12V 10A My bike comes with an electrical spec of DC (...
13
votes
3answers
2k views

What is the motorcycle equivalent of OBD-II?

I once met an OBD-II expert while traveling and asked him if motorcycles (especially the fuel-injected ones) employ a similar protocol. He said that the use of such a protocol is not as widespread ...
4
votes
1answer
649 views

Meaning of dashboard “Check Engine Light” on motorbike

Please help me understand the meaning of this dashboard light shown in the picture. ABOUT BIKE SPECIFICATION What happen if it blinks RED ?
8
votes
4answers
94 views

Oil filter on my motorcycle is not coming off

Background: I own a Yamaha XJ6n. This is the first time I'm removing the filter. The last guy who owned this must have screwed it on reaaaal tight. My oil filter is refusing to come off. This should ...
9
votes
3answers
2k views

My motorcycle is refusing to start, which common problems should I look for?

I've just taken my motorcycle out of storage, I rode her around the block once, parked her, and now she is refusing to turn over. The starter seems to be running fine. I've just filled the tank with ...
5
votes
2answers
170 views

Engine weakening for Bajaj pulsar 220F

Everyone knows that apparently a bike looses it's power with age. But I refuse to agree to this. Shouldn't proper care allow your bike to maintain its pickup over the years? I own a 2014 Pulsar 220 ;...
3
votes
1answer
41 views

Intermittent clutch pedal stiffness

I have a 1999 Suzuki SV650S with 15k miles on the clock. Sometimes the clutch pedal is really stiff to down or upshift. About 70% of the time it shifts nice and smooth. I haven't been able to identify ...
7
votes
2answers
52 views

Cant Remove Nut on Clutch

I have a 2006 Honda crf150F. I need to get to the components of my shifter to adjust something, but I need to remove the entire clutch housing to get to it. Here is a drawing of the clutch assembly: ...
5
votes
3answers
348 views

I am looking to buy a motorcycle which I can fully (or as close to fully) maintain and repair on my own. Which models should I look at?

Which motorcycles are well known for being easy to maintain and repair, and would be suited for a beginner to cut his teeth on? What are some features of motorcycles that I should look for, when ...
2
votes
0answers
16 views

2001 Suzuki Intruder W/'03 ENG burning out voltage regulator

Bike will start and run for about fifteen minutes then unexpectedly quits. Replaced voltage regulator once already. I've checked fuses and looked for exposed wires....still no luck. Any explanations?...
11
votes
1answer
555 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 ...
4
votes
2answers
1k views

Single Cylinder 2 stroke bike with twin exhaust, will it need two chambered exhausts?

I am asking specifically about Yezdi (not in production anymore) 250/350cc motorcycles. Yezdi RoadKing was a 250cc single cylinder two stroke with twin exhaust. If upgrading to a calculated chambered ...
7
votes
2answers
78 views

Honda R8X-S heat seize

I've got a Honda R8X that heat seizes when I'm riding it when it goes over 40mph. The lad I got it off said he had it re-bored and that it was run in. Will I need to re-bore this again or is there ...
24
votes
2answers
2k views

Why do two-stroke engine exhaust pipes look so strange?

Two stroke gasoline engine exhaust pipes are shaped strange. They expand into a wide diameter and then shrink down to a very small diameter where the exhaust gasses emerge into the environment. Why ...
5
votes
3answers
80 views

Motorcycle randomly loses power

I have a single cylinder, 200cc, carbureted, 5 speed, 12V, 2006 Lifan LF 200 motorcycle that typically runs fine. It will sometimes randomly lose power and I cannot get it to go above 25 mph. When ...
6
votes
2answers
63 views

How to troubleshoot carburetor?

I am facing poor fueling with my carburetor in my 2011 Yamaha Fz 16. What are there trivial trouble shooting checks I need to do to diagnose the issue?? Edit: When ever I am driving in low RPM, I ...
10
votes
5answers
582 views

Need to rotate an out of reach bolt or pin

I'm trying to fix the shifter on my dirt bike. I've located the problem, which is a pin that's come loose. The shifter kind of works, but every now and then it gets jammed because this loose pin isn'...
6
votes
1answer
2k views

My motorcycle won't start at all why?

Something is draining my battery and my bike won't start. If it's the relays which one is it? My motorcycle doesn't crank at all. it makes a buzzy noise when I press the start button. It sounds like ...
9
votes
3answers
552 views

Does gasoline ruin an air filter?

The carburetor on my 2005 Honda Shadow Aero (VT750C) had a bad leak and flooded the air cleaner assembly with gasoline. The air filter was completely soaked with gas, so I let it air dry. Is my ...
8
votes
3answers
894 views

How Does a Quick Shifter work in a motorcycle

I have often seen motorcycles like the BMW S100RR and the famous Ducati Panigale with Quick Shifter technology which allows seamless gear changes. I want to know how these things work mechanically ...
0
votes
1answer
55 views

Suzuki GSX 150 fuel knob position

How do I identify the GSXR 150 fuel knob location? ON POSITION. RESERVE POSITION OFF POSITION. Can someone give me an idea of the various positions based upon a clock face? Thank you.
4
votes
1answer
87 views

What is the best way to repair these motorbike wires?

2 of the wires on my motorbike were cut and used to hotwire it. It's been recovered and I need to permanently connect these back together. What would be the best and easiest way to do this? An ...
11
votes
1answer
186 views

“Valve like” noise after modifying camshaft ninja 300

A friend and I bought a modified camshaft for his ninja 300/EX 300. After installing and checking/adjusting valve clearance everything seemed ok. After a few laps on our local track the bike started ...
6
votes
2answers
71 views

Safe to buy new piston for your two wheeler engine

I own a Honda Stunner 125 CC motorcycle. I bought it in 2009. Since last year I have observed that it is emitting white smoke. Mechanic recommends that I purchase new pistons or after some time ...