This video provides a comprehensive guide on how to repair a bicycle using simple tools at home. It covers common bike repairs, such as adjusting the chain and shifting the shifter, which controls the derailleu. The video also highlights the importance of DIY bike repair tasks, including choosing repair tools and lubricants, and learning how to maintain your bike. While a knowledgeable bike mechanic is essential for big tasks, there are many DIY tasks that can be done at home, such as simple shifting adjustments and replacing bar tape. Home maintenance can save trips to the mechanic and keep your bike running longer and better. The article also covers how to fix a chain, flat tube, and more. It also discusses how to tackle an engine rebuild your own motorcycle engine, which can involve parts replacement, upgrades, and detail finishing. The top five tools for dirt bike or motorcycle engine building are torque wrenches, lubricating your pistons and engine combustion chamber, and ensuring proper maintenance.
📹 Bike में full engine का काम ! 100 cc bike repairing ! bike engine full overhaul ! change piston cyli
Bike में full engine का काम ! 100 cc bike repairing ! bike engine full overhaul ! change piston cylinder #bike repairing …
Is it cheaper to buy a new engine or rebuild?
While rebuilt engines are a cost-effective solution, there is a possibility that they may not utilise high-quality replacement parts. Such engines can be rebuilt to a standard that is comparable to that of new engines, with the added benefit of a longer lifespan and greater mileage. Furthermore, the warranty coverage is often comprehensive.
Can you fix a bad engine?
A malfunctioning engine may be restored to optimal functionality through the rectification of minor underlying issues, such as a fractured head gasket, damaged piston, or a faulty timing belt. Nevertheless, some defects are too complex to repair and may necessitate the replacement of the entire engine. The optimal solution is to consult with a specialist to address the issue, and Dave’s Automotive LLC is a recommended resource for this purpose.
Is it hard to rebuild an engine yourself?
Building an engine can seem like an impossible task, but it’s not as difficult as it seems. It requires a careful eye for detail and a strong ability to follow directions. Rebuilding an engine is precise work, with clearances being less than a few thousandths of an inch, so there’s not much room for sloppiness or shortcuts.
Lessons learned from going elbow-deep into an engine’s guts can help make the job go smoothly. A good selection of tools and supplies is necessary before starting. Experienced home mechanics may already have most necessary hand tools, but specialized tools like a quality micrometer and an accurate torque wrench are also useful. A first-rate straightedge and expanding bore gauges are also useful items.
In summary, building an engine is a challenging but rewarding experience that requires a keen eye for detail and a strong ability to follow instructions.
What can destroy a motorcycle engine?
Motorcycle engine failures are often caused by a lack of routine maintenance, such as not changing the oil or neglecting the air filter. Dirty or insufficient engine oil is a common cause, as it provides vital lubrication and cooling to moving parts, reducing friction, stress, and excessive heat. However, as engine oil gets dirty and breaks down over time, it reduces its ability to lubricate parts and absorb heat. A lack of oil also creates friction that overheats the moving parts, making most engine failures preventable with proper maintenance.
What to do when a bike engine seizes?
In the event that the engine begins to seize, it is advisable to disengage it from the rear wheel, pull off the road, stop, and allow it to cool. Although replenishing the oil and restarting the engine may prove beneficial, it is imperative to conduct a comprehensive examination to ascertain the extent of any potential damage.
Is it difficult to rebuild a motorcycle engine?
Rebuilding a motorcycle engine is not a difficult task if you have a keen eye for detail and patience. It is a long and time-consuming process that can be costly, especially if the engine is overly noisy, blowing smoke, or weakening. It is crucial to determine if a minor repair job will solve the issue or if a brand-new engine is necessary. Rebuilding a motorcycle engine is cost-effective and allows for customization of performance.
However, before embarking on such a task, it is essential to ensure the motorcycle truly needs it. Signs of the engine nearing its end of life can be difficult to spot and can disguise as common problems easily solved by simple repairs.
How long do bike engines last?
Motorcycle engine life is determined by various factors such as component quality, riding conditions, make and model, and maintenance frequency. The average life expectancy of a motorcycle is estimated to be between 50, 000-250, 000 miles or 12-15 years. The number of miles a motorbike is ridden per year can vary, as touring motorbikes are designed for long-distance travel, and the number of miles traveled per year tends to be greater than sports bikes or café racers.
To calculate the average life expectancy of a motorcycle, divide the expected total mileage by the average number of miles travelled per year. For example, a Honda Goldwing has an estimated life expectancy of 250, 000 miles, covering an average of 2, 500 miles per year.
Is it worth fixing a bad engine?
When choosing between an engine rebuild or replacement, consider factors such as the overall condition of the vehicle, the cost of rebuilding, the time-consuming process of rebuilding, and the impact on the vehicle’s value. A rebuild can preserve the original value of a classic or vintage car, while a replacement, especially with a used engine, may decrease the car’s resale value due to concerns about wear and tear or lower performance. In newer vehicles, a new engine can boost value if it offers better performance or efficiency.
The actual impact of the decision should be based on a balance of cost, time, vehicle condition, and potential impact on value. In summary, the decision to rebuild or replace your engine depends on the specific circumstances of your vehicle, such as age, model, and overall condition.
Can you unstick a seized engine?
In order to liberate the engine, it is necessary to rotate the bolt in a clockwise direction while simultaneously introducing a penetrating oil into the cylinder walls via the spark plug wells. It is recommended that the oil be allowed to work for a period of approximately two hours before attempting to repeat the process. In the event that the vehicle is equipped with a manual transmission, it is recommended to utilize the momentum to facilitate the rotation of the engine. These 13 methods are detrimental to the longevity of your vehicle.
Is there any way to fix a seized engine?
The process of reviving a locked-up or seized engine involves several steps. First, check the engine’s oil level by removing the dipstick, wiping it clean, reinserting it, and pulling it out again. If the oil level is adequate, you can move on to the next step.
Next, lubricate the engine by removing the spark plug to access the engine’s internals. Set aside the spark plug and add a small amount of WD-40 lubricant or Marvel Mystery Oil into the cylinder. These products are renowned for their penetrating and lubricating properties. Gently pull the recoil starter and clear the excess lubricant before reassembling the engine.
In summary, reviving a locked-up or seized engine requires a few straightforward steps. First, check the oil level by removing the dipstick, wiping it clean, reinserting it, and pulling it out again. Once the oil level is adequate, proceed to lubricate the engine.
Can motorcycle engine be repaired?
Repairing an existing motorcycle engine can be a more cost-effective and efficient option than buying a new one. A motorbike engine rebuild can improve various aspects of your bike, including sound, performance, emissions, horsepower, and torque. DIY enthusiasts can find a variety of motorcycle parts at Taverner, including complete engines, hot-up kits, crankcase and bottom end, cylinder heads, and components.
Benefits of repairing your engine include regular maintenance, cost savings, and reducing the risk of bigger, more expensive repairs. Taverner offers all the necessary parts for DIY jobs, making it an ideal choice for those looking to save money on their motorcycle repair needs.
📹 Restoration of a Legendary HONDA CG125 Engine
In this video you can watch restoration of Honda CG125 Engine from 1972. This will be third part of this series. Next part will be …
Mere mistri bhai kya aap mere madad karege mere pulsar 150 2003 jo single plug wali aati thi usme mene sab cheak kar kiye carburetor cam shaft cdi new lagaya hai or baki item sab theek hai na koi carburetor side leakage hai but jab me jara sa accelerator leta hu to bike dabne lagti hai or carburetor side se aag nikalti hai or fat fat aawaj aati hai bike jhatke marti hai me bhoot paresan hu iss bike se sab kuch cheak kar liye mere hazaro mechanic ko dekhaya hai koi theek nhi kar paya carburetor me back pressure sa lagta hai plz koi mere help kariye comment me bataye me kya karu🙏
Muy buen article artísticamente, desde una vista de un conocedor en mecánica, lo veo solo como una restauración estética, puedo apreciar muchos detalles que no son correctos, cómo por ejemplo, no cambios ningún rodamiento del motor que son muy importantes, no lo vi desarmar las válvulas para asentarlas, limpiarlas ni mucho menos regularlas cuando puso la torre de balancines, tampoco cambio los retenes que con más de 50 años ya no tienen la elasticidad para cumplir su función óptimamente. Si me gustaron algunos detalles como la puesta a punto, el torque (ahunque solo le dió a la tapa de cilintros) y la fabricación de las empaquetaduras con papel bilumoide que por cierto le faltó la del filtro centrífugo. En fin, puede que me equivoqué y alla echo esto fuera de camaras pero sería bueno tomar esto en cuenta para un siguiente article.
I am no expert but that engine looks brand new inside. When I was young I bought a motorcycle that was sitting outside for many years, managed to start it up and drove it for 2 years without changing anything, not even the oil, and sold it as it was for double the price. LOL. I would be so scared to put all those pieces back together. Great job!
In Brazil, the CG 125 OHV was in production from 1976 to 2008, being CG 125 at launch, in 1990, it was renamed CG 125 Today, receiving the CDI replacing the platinum in 1992 and also some improvements in the engine, in 1995 it passed to be called CG125 Titan, in 2000 Titan underwent a redesign of the motorcycle, receiving some improvements in internal parts and adoption of electric start, in 2005 it was renamed CG125 Fan, until the end of production of OHV engines in 2008 due to engine no longer meets the restrictions of Promot III. It was the best-selling motorcycle for 32 years. The CG 125 Fan continued to be manufactured from 2009, but with a completely different engine, derived from the CG150 Titan OHC, launched in 2004, the 2009 CG 125 OHC was nicknamed “Bufa”.
Hello Thank you very much and well done This HONDA CG 125 engine model is very abundant in Iran And 70% of the engines in Iran are of this model and I have one of these models These engine models are very good engines and are compatible and efficient in all weather conditions Thank you 👌🌹? hootan Iran 🇮🇷
I had a 71 Honda SL-125 that eventually had a 145cc powroll kit installed on it and before I did the kit on it i tried blowing it up to see just how tough the little 125 engine was and just held it WTFO for well over 2 minutes straight and nothing WTF that surprised the hell out of me thought for sure it would let loose after just a minute NOPE 🤣💪💪😎 Owned and raced alot of Honda XR’s AND CR ‘s and I’d have to say that those old air-cooled XR ‘s were damn near bullet proof ! Keep your oil/filter clean, air filter clean and a fresh plug every now n then and that engine will last FOREVER 💪😎👍
These are strong engines, my friend rode mine without any oil for some time after I changed it but found that someone used my quart of oil. I had told him that he could ride it whenever but he didn’t know I got a ride to get a quart of oil. It smoked a little bit after that so I pulled the top end and honed the cylinder and put some new rings in it. Mine was a used bike that was rode hard and it still ran when I sold it years later for $50 bucks.
You can still get a new one in the Philippines. Currently marketed as the TMX 125. Assembled at the Honda plant here from domestic and Chinese parts. There are also knockoffs marketed as Skygo, Rusi, MotorStar and others at varying levels of build quality and price but even the Honda badged machine is only around $1,000 USD.
dude, you cleaned, bondo, and painted a already clean motor, no new bearings, no rebuild, at least do crank bearings, wrist pin, rings, quick couple of passes with honing bar, you had it apart, the parts are cheap and easy to install, and you really should get feeler gauges adjust the clearance on the rocker arms/ valves, not just torque it all back together, and for christmas sakes when you bolt down any cyl head always cris cross pattern =front left, rear right, front right, rear left,ect, if you gonna call it a full resto than do it right never put a top end back together without at least replacing the rings, and as many of the bearings as you can………..PS- bondo?????my man, bondo and spray paint ….just no.
I used to have a 2022 Chinese dual-sport with a 250cc engine. The engine was cloned off of this CG engine. It’s crazy how similar this engine and the one that was on the dual-sport. Everything from the internals of the cylinder head to the oil filter screen when I did oil changes and valve lash adjustments it’s all the same. 50 years apart and they still use the design since it’s built like a tank!💪
Nice job. Next time, while the case is still sealed, take the thing outside and hose it down. There’s really no sense in saving all of that grime for laborious hand removal later across individual parts. Let a sprayer, gravity, and a drain help. Not that it matters here, but it’s always good practice to clean debris away before exposing internals.
This brings back memories, I had one of these bikes for years, I rode one from North Wakes, to Cottingham, in Hull, for my part one and two training, did the full journey there on one tank, did my training and part one test, and all part two training, than went home on the Sunday. I passed my part two test shortly after. Happy times.
Most of little air cooled honda engines that i know, share few common things : – cheap & pretty easy to work on – durable af, pretty scheduled oil change & valve adjustment gonna keep this thing running strong for years – fuel efficient – might not be the fastest in its class but enough torque to do the work – odd placed oil filter
Oh dear, first of all it wasn’t a restoration but just a cleaning. You start by cleaning the engine when it is complete. Measure the compression… Then the engine is dismantled, everything is measured precisely and worn parts are replaced, including ball bearings and oil seals. Piston rings should also be replaced. The carburetor belongs in an ultrasonic bath…..that is the minimum if you are already dismantling the engine….
Nice. In the UK these little pushrod motors were the CG125 – the various CB 125s were all overhead cam. The CG was marketed as a commuter bike and so lower priced. They appeared in 1976 and I had a ’78 version. Not fast, but sipped petrol (100 miles per gallon was possible) and as long as you did regular oil changes, cleaned out the centrifugal oil filter and kept the points in good condition it would run like a slightly rattly clock. Mine was still doing that when I sold it with 72,000 miles on the clock. I went everywhere on that thing for years through college and then on the dole in Thatchers Britain no experience, no job. No job, no experience. Build quality and finish were excellent in the earlier ones and tolerances and specifications of materials spot on. Later ones were made in Brazil under licence and they has rumours of lower standards of quality control and materials specification. Never had one, but that carb is a later one with the plastic choke lever. Not a highly-regarded bike over here, but well worth the effort of sorting one and using it as reliable everyday transport. A 12v conversion is worth it for better lights, but the 6v had direct generation ignition so if you could spin it over fast enough it would start and run with a flat battery.
All u done was dissemble paint resemble. You didn’t even put new piston in. No new bearings,seals well gaskets you made! Bro my ten year old can actually do better than this. Well he has done quite alot of times. When I restore engines i paint,new seals,gaskets,all bearing,clutch plates,piston, come on man!!!!
For the amount you pay people to do this, you would be better off buying a new engine. Unless it’s a hobby to work on it, I don’t recommend paying people to restore your old bike. For the amount I spent to restore my bike, it’d be better buying a new one LOL. It’s a nice hobby to work on but time gets harder to find as you get older
I remember every part of that engine well, perusal you dismantle and assemble it reminds me of my off-road go-kart (it was exactly the same) in the early ’90s that we used for a friendly championship on dirt and mud tracks. It was thrilling, but when it broke down, it was often the valve plate that caused the trouble. And when the valve descended into the cylinder and met the rising piston, it meant a big loss.
My daughter bought a Chinese made knock-off of one of these engines, a 230cc unit. Construction much the same though has CDI ignition. It had an oil seepage at the head joint which pushed me to take off the head and put in better parts. I was a Honda mechanic in the U.S. many years ago, very few push-rod engines from them in those days.
I enjoyed it a lot and the cartoon was great. I have a Honda cdi 125, which is one of the generations after cg, and it has worked for about 30,000 km, and I think my clutch plate should be changed, but I really didn’t want to open the door of my engine because it had not been opened before and it was the company’s seal. But eventually I have to do it. Thanks again for your good article❤