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

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2
votes
1answer
24 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
62 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 ...
-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. ...
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 ...
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?
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 ...
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 ...
4
votes
1answer
23 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 ...
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 ...
2
votes
1answer
21 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, ...
3
votes
2answers
27 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 ...
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. ...
4
votes
2answers
41 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
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 ...
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 ...
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 ...
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 ?
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 (...
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 ...
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: ...
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?...
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
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 ...
5
votes
3answers
81 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 ...
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 ...
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 ...
3
votes
0answers
38 views

New fairing from China - front centre cowl - screws don't fit

I recently bought some new fairing from China. When trying to fit the headlight to the front centre cowl, it appears that the holes for the screws are too small by a fraction. Also, in the old cowl, ...
1
vote
1answer
38 views

Checking oil on a newly-aquired used motorbike

I've recently bought a used motorbike and am unsure of how to gauge the age/condition of its oil: Neither did I fill the oil in the first place (so I don't know what colour it used to be) nor have I ...
13
votes
6answers
4k views

Why is the speed of a motorcycle measured at the front wheel?

I have been thinking about this, from quite long ago. Why is speed always calculated from the front wheel? Let's just consider the following situation:- You are in a race, and you have given full ...
1
vote
1answer
54 views

Installing clip on bars, limited space available. Will an adhesive be neccesary?

I'm planning to install clip on bars on my bike, however I have encountered a problem. If I install them in the traditional under the triple clamps position, they may lack clearance from the tank and ...
3
votes
2answers
126 views

Parking in the open in heavy rains

What if my bike is left 4-5 hours during heavy rains 5 days a week for 12 weeks? This type of weather is common in India during monsoon. I drive to work where there is open parking leaving my bike ...
5
votes
1answer
71 views

How long can “Stabil”ized gas stay fresh? and can it be improved?

I had my sportbike in storage for at least 3 years. It is Electronic Fuel Injected. It had a full tank of Premium Gas (Shell or Mobil). I put in STA-BIL to preserve the gasoline. Is the gas beyond ...
10
votes
2answers
533 views

Is it safe to fix a bent motorbike wheel?

Long story short my front wheel took a hit and the rim is now slightly bent. Now, since this is a forged aluminium wheel, replacing it costs the best part of 1500EUR. Being on a budget I thought of ...
3
votes
1answer
63 views

How to Properly Reinstall Rotor and Stator on Suzuki DL1000

Background I am attempting to reinstall a new Rotor and Stator onto my DL1000. I uninstalled the old parts over a year ago and haven't gotten around to the rebuild until this summer. I have some ...
3
votes
1answer
98 views

my motorcycle take more time to accelerate

I have a Honda CBF125 Stunner. Sometimes when I increases the throttle the bike cannot attain the real speed that matches the RPM and the engine sound changes. The bike takes more time to attain ...
3
votes
1answer
49 views

Cheap diagnosis/repair of damaged fairing

There are already a number of answers regarding ways to fix small scratches in bodywork, but I'm not sure of the exact "nature" of the damage to the fairing of my motorbike: It's not my bike, though I ...
0
votes
0answers
25 views

my motorcycle lack speed while increasing throttle [duplicate]

I have a Honda CBF125 Stunner. Sometimes when I increases the throttle the bike cannot attain the real speed that matches the RPM and the engine sound changes. What may be the problem ?
2
votes
1answer
38 views

BMW R1200GS LC Warm Up

How long should I warm up the engine before starting casually riding it in the city for keeping the engine as healthy as possible? Not at all, 30sec, 5 min or longer? And how long NOT to warm up ...
1
vote
1answer
46 views

dirt bike low rpm lugging

I have a 84 Honda XL350R. I know redlining a dirt bike is not good, but what about lugging in a high gear? When I say lugging I mean lugging.(no throttle whatsoever, can say the 4 stroke cycle suck,...
5
votes
2answers
124 views

Increasing rear sprocket size for torque gains, will a dyno tune be required?

In order to get some mid range and torque gains, I've decided to replace my rear sprocket with a bigger one. I asked a friend of mine (experienced motorcyclist, been riding for decades) and he said I ...
11
votes
8answers
1k views

How to Remove Stripped Hex Bolts

While trying to remove a rotor from my Suzuki DL 1000 , I'm finding that some of the hex bolts are stripped. Attempting to use SpeedOut does not appear to be producing the desired result. Any tips ...
6
votes
2answers
499 views

Can I avoid buying a ridiculously expensive replacement starter motor?

My situation can be described with a photo: That's my starter motor, which doesn't appear to be in a healthy condition. What I would like to know is, can I avoid spending over $500 on a new one in ...
3
votes
2answers
99 views

Should I remove the rings when cleaning a piston?

I want to clean my piston in a small ultrasonic cleaner (with distilled water). Do I need to remove the piston rings to do so, or can I leave them on and make sure it dries completely? If I replace ...
3
votes
1answer
58 views

Hero Passion Pro - Choke Issues

I have a Hero Passion Pro Motorcycle. It does not get started when the choke is on. It does start when the choke is turned off? The engine produces a disturbing noise and smoke goes out when the ...