Questions tagged [motorcycle]

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

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24
votes
4answers
376k views

Symptoms of Lean or Rich carb settings on a motorcycle

I have a 1981 Yamaha XS650. I recently put in K&N stock replacement filter (ie, they are in the airbox and conform to the size of the original), however they may be leading to a leaner mixture ...
10
votes
2answers
6k views

Why is the engine on my Royal Enfield Classic 350 shutting down?

After travelling 7-8km on my Royal Enfield Classic 350, the bike acts as if the fuel is finished & the engine shuts down, but it starts again when I pull the accelerator. What could cause this ...
8
votes
3answers
3k 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 ...
32
votes
6answers
27k views

Why is a motorcycle's neutral between first and second gears?

The gear pattern is selected by clicking a lever with your left foot and is typically laid out as follows: 6th gear (if applicable) 5th gear 4th gear 3rd gear 2nd gear NEUTRAL 1st gear What is ...
11
votes
2answers
1k views

Motorcycle Four Body Carburetor Synchronization Balancing

I would like to adjust four-body carbs by myself, in order to avoid spent money every time. What are the basic rules, tools and secrets of synchronizing multiple carburetor bodies?
9
votes
1answer
1k views

Carburettor jetting on installation of aftermarket air filter

I have a 150cc motorcycle and am planning to install an after market air filter(K&N) since the stock one was favoring fuel efficiency and not performance. The bike has a carburetor (Mikuni) not ...
8
votes
1answer
9k 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 ...
7
votes
2answers
5k views

Suzuki GSXR600 (K7) - Burned regulator/rectifier

I have managed to completely fry the regulator/rectifier on my Suzuki GSXR600 (K7). I suspect that it happened when I blindly splashed into a big water pond, some water probably got on the connector....
19
votes
7answers
2k views

Seized nut & bolt - difficult to access

Last year I added crash sliders to my aging Honda CBR 600F (1998) Recently whilst trying to remove the fairing for other work, I found the nut and bolt were "seized". Actually, by using a spanner at ...
17
votes
3answers
94k 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 ...
11
votes
3answers
33k views

What are the advantages of upside down forks?

Recently, I have come across many bikes which have upside down front forks. From browsing around the internet, I was not able to get a concrete answer for why it is preferred over conventional ...
3
votes
3answers
1k views

Motorcycle Recharge System Checks?

I have a 2007 V-Strom DL1000 motorcycle, whose recharge system is not recharging a new battery. I also have a multi-meter. Could someone share how I can check the recharge system without removing the ...
3
votes
4answers
21k 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
594 views

Supercharger calculations

How to determine safe supercharged pressure and CFM for a motor cycle engine (fuel injected 149cc (9.31 cubic inches) 12.9 bhp?
9
votes
1answer
55k views

What are the differences between a wet motorcycle clutch and a dry motorcycle clutch?

What are the differences between a wet motorcycle clutch and a dry motorcycle clutch? More specifically, what are the differences in applications performance reliability maintenance/repair
6
votes
2answers
4k views

Is this the correct procedure for a stator test?

Stator Test I have a 2007 DL 1000 V-Strom: I followed the following process while checking the stator: Put multimeter to VAC Tested the three phases of the stator connector plugged into a new ...
6
votes
3answers
1k views

What are the critical maintenance items for a new motorcycle?

I have purchased a new motor bike recently. What are the critical maintenance items that I should focus on? For example: Is it true that we should not run new bikes on high rpm for some time? What ...
4
votes
2answers
30k views

What is the difference between a normal battery and a maintenance free battery in a 2 wheeler segment

What is the difference between a normal battery and maintenance free battery. Is a maintenance free battery really free of maintenance or just it requires less no of charge cycles. I currently own a ...
3
votes
3answers
7k views

What is the difference between JASO MB and JASO MA and JASO MA2

I want to ask the differences between the JASO MA MA2 and MB oils.I have checked the JASO website but does not offer much information on this.Also why is it advised to not use JASO MB oil for ...
3
votes
2answers
802 views

1987 Yamaha FZ700 headlights not working

I recently bought a 1987 Yamaha fz700, and the owner said the headlights didn't work, and I can't figure out what's wrong. We checked some of the wiring out, and the bulb connectors have no power ...
2
votes
2answers
1k views

Motorcycle Gas Pump Auto Shut-Off

Are the automatic shut-off systems at gas stations compatible with motorcycle gas tanks? Specifically, the 2017 Honda Rebel 500, which is a cruiser with a 2.96 gallon gas tank. Here is a video of a ...
1
vote
2answers
2k views

Faulty Motorcycle Regulator?

I am on my second 12v motorcycle battery in a couple of weeks. Will a faulty regulator, ie too higher volts, cause this? Also I have upgraded my ct110 to a 160cc, all works well for a few days, then ...
1
vote
1answer
65 views

Poor Uphill acceleration and skipping gears

I have a Honda CBF125cc 2010 model. I have recently tightened the chain and changed the sprockets. In the last couple of weeks my bike seems to skip 4th gear. I can physically move the gear shifter ...
0
votes
3answers
960 views

Why does my motorcycle cut out at random intervals?

The bike is a 1991 Honda Nighthawk with just over 180,000 miles on it. It is around 230ccs, and has a carburetor. This is my first bike, so I don't have any idea what is typical behavior for a ...
16
votes
1answer
3k views

How do I find the correct pins in a CAN-BUS connector?

This question might be too technical for this forum, but I'll give it a go. I have a 2012 BMW R1200R motorcycle with CAN-BUS. I'd like to make an Arduino interface to the connector on the bike, but I ...
11
votes
3answers
17k views

How to start my motorcycle when the kick-starter fails?

This morning I tried to start my motorcycle but the kick-starter failed. It was idle for about a month but it was riding fine before that . My motorcycle doesn't have an electric starter function. ...
24
votes
5answers
141k views

Why should the fuel petcock valve be turned to “Off” position when not using the vehicle?

It’s mentioned in the user manual of my motorbike, that when not using the vehicle, I should turn the petrol tap (the one that has three positions “On”, “Off” and “Reserve”) to “Off” position. I don’t ...
11
votes
1answer
5k views

Motorcycle Speed Wobble - How do I figure out the problem?

I have a 2005 GSXR 600. I took it for a test drive and the head shakes around 65mph or so and then goes away when I go past that. It's worse when I'm slowing down without the front brake. When I ...
8
votes
2answers
20k views

Carburetted motorcycle stalls when accelerator is applied

My father has 1995 Kawasaki VN 800 Vulcan with low kilometrage (18 000, 11 000 miles). We had installed new Vance & Hines pipes on it (in hindsight, way, way too loud, but that’s beside the point, ...
8
votes
1answer
693 views

Once-only thud knock when open throttle

I have a 1997 Yamaha TRX850. When I open the throttle I'm hearing a thud knock sound near the left crankshaft cover. That sound does not always appears and I can't find any correlation between ...
7
votes
6answers
21k views

Is it bad to mix tire brands on a motorcycle?

I'm looking to get new tires on my motorcycle and picked out different brands for front and rear. Both are radial tires. I didn't think this was a problem until a friend mentioned it to be a terrible ...
6
votes
3answers
1k views

What should I look for in a basic motorcycle maintenance toolkit?

I'm looking to do more of my motorcycle maintenance myself, and am wondering what I should be investing in, when it comes to tools/devices. What are the basic tools that I'd need when starting to do ...
5
votes
2answers
3k views

Aprillia Pegaso 650 won't start after cleaning carbs, what might be wrong?

I have a 1999 Pegaso 650 which has been sitting idle for about 7 years. The carbs were quite bad shape when I got it. The first time I cleaned the carbs I was able to get the bike started but it was ...
4
votes
2answers
10k views

1999 gsxr 600 - What is wrong when my regulator keeps burning out? [duplicate]

I recently had my clutch replaced and a new battery put in. Within a month my regulator/rectifier burnt out of it. So, I purchased a new one. After 2 weeks that one burned out also. I replaced the ...
3
votes
2answers
2k 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:...
28
votes
2answers
21k 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. - ...
15
votes
3answers
10k views

What are the Advantages of a Single Side SwingArm on Motorcycles?

I have noticed that Ducatis , Honda and Triumph have bikes with a Single Sided SwingArm Much like most of the scooters. Are there any advantages of following this design , if so why are not all ...
12
votes
3answers
3k views

How do you get the carburetors out of a 1983 Kawasaki KZ1000 P?

It's a 4-cylinder engine, and the carbs are really wedged in there. The best way I know is to loosen the boots on both sides, pull the carbs back, and try to slip them out sideways, but what a pain! ...
11
votes
3answers
2k views

What do these compression figures mean

This is a follow up question to What are the causes of fluctuating intake manifold vacuum I have a 2005 Honda CBR600 F4i which suffers from occasional hesitation at low rpm when accelerating. After ...
8
votes
3answers
6k 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 ...
8
votes
1answer
117 views

Troubleshooting fluid leakage onto the engine area?

The bike is a Hero Honda Splendor Plus, and I've been seeing some fluid on the engine area for a month. Earlier I used to ignore it and wipe it off, but it returns. The bike's mileage has also reduced,...
6
votes
1answer
2k views

Yamaha Seca - Motorcycle Idle problems

My motorcycle (1982 Yamaha Seca 650) has had a strange problem with the idle for a few years now. I have not been able to diagnose it and I'm hoping that someone here might be able to help. It starts ...
6
votes
2answers
5k 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 it ...
6
votes
2answers
4k views

Royal Enfield Classic 350 - Motor Break-in Best Practice

How many km's should be driven with a lower speed to setup the bore for a Royal Enfield Classic 350, what is the minimum speed for that duration and how many km's should we maintain that lower speed?
4
votes
2answers
213 views

Compression/power increase for ethanol engine?

It's said that ethanol is capable of more power than gasoline in an engine exclusively designed for it. I believe this is because it can handle higher pressure before detonating, meaning higher ...
4
votes
1answer
5k views

Head Lamp on Honda Shine

I'm planning to change/modify the Headlight bulb. kindly suggest. My bike (Honda Shine) has 12V 3AH(MF) Battery & Head Lamp 12V 35W/35W halogen bulb. In rainy season & city Bye-pass roads the ...
3
votes
1answer
167 views

Is it really necessary to resurface cylinder and substitute piston?

I believe this is common in motorcycle maintenance, I have heard in some places that, once you get the piston outside the cylinder there is no way back, you need to resurface the cylinder and get a ...
3
votes
2answers
4k views

“tick-tick” sound in Enfield Clasic Motorcycle

BIKE ENFIELD CLASSIC 350 2013 Model ODOMETER: 14000 One and half year old Oil changed one and half month before general servicing. There is a particular sound from the engine while riding ...
2
votes
1answer
391 views

1972 Honda CB750 Motorcycle Choke

First, I have to preface that I am a complete newcomer to motorcycles. I don't have any people in my circle of friends that ride so I'm just diving in and learning and asking questions on here since I ...
0
votes
2answers
2k views

Royal Enfield classic 350 engine off while running

I bought a brand new Royal Enfield Classic 350 and I rode around 1200 km. Since the delivery of bike, I have faced a recurring problem with the engine shutting down while the bike is running. When I ...