What is the case for a bottom end rebuild?
The case for a bottom end rebuild is dependent on the type of riding that is being done, so questioning the rider on their type of riding is imperative to answer it correctly. Being told the piston must be replaced every 15 hours bothered me as well.
How much does a top end engine overhaul cost?
And how about the cost of a top end overhaul in your own garage? This could run you as little as $260 for a piston replacement, which includes a new piston, rings, circlips, head and base gaskets, and a freshly honed cylinder. Pretty inexpensive right?
How much does it cost to rebuild a small engine?
The average figure for rebuilt engine prices is between $2,500 and $4,000. Of course, as these are averages, you may also end up paying even more than this. Click to see full answer.
Can you check the bottom end without removing the top end?
The shop guy tells me, repeatedly, you can’t check the bottom end without removing the top end. So I ask about the top end and tell the shop guy, “Well the previous owner said he did it every 40 hours and there are about 20 hours on it since he last did it. Was his service interval right or should it have been done more or less?”
What is a bottom end rebuild?
The bottom end refers to the conrod, and is Basicly a full rebuilt. The conrod and all bearings are normally replaced at this point, and on average most people do a bottom end every 2nd top end they do.
How often should you do a bottom end rebuild?
The bottom end on a four-stroke engine can typically see 100 hours of life, however, to be on the safe side, most riders will rebuild it at approximately the 80-hour mark. Again, when you're rebuilding the bottom end, always rebuild the top end and throw in a new piston at the same time.
Is it cheaper to rebuild or replace an engine?
Rebuilding to repair is usually cheaper than buying a new engine, too. You may save up to half of the cost of a new engine by rebuilding. However, sometimes rebuilding is not a good option. In cases where rebuilding will cost as much as a new engine, your mechanic should be upfront about those costs.
What do you need for a bottom end rebuild?
Bottom end rebuild toolsLarge sockets and spanners, up to 28 mm should cover all dirt bikes.Flywheel puller (link to flywheel puller on Amazon)Flywheel holding tool.Clutch basket holder.Crank puller.Case splitter.Rubber mallet.Claw hammer.More items...•
How do you tell if you need a bottom end rebuild?
If you have a two-stroke engine, you know you need to rebuild your bottom end when you notice you're not getting the amount of power you used to or when you've reached between 70 and 80 riding hours. For four-stroke engines, rebuild your top end between 80 and 100 hours of riding use.
Is 100 hours on a dirt bike a lot?
What Is Considered High Hours on a Dirt Bike? If you're a dirt bike enthusiast who casually drives the motorcycle from time to time, 100 hours is considered high hours.
How many miles will a rebuilt engine last?
A typical warranty on a rebuilt engine is for at least one year or 12,000 miles.
Is a rebuilt engine like new?
An engine rebuild is known as a process where the finished product is considered brand new from the inside out. All the parts of the engine that display signs of wear are replaced with brand new replacements. The parts that could be replaced include the valves, pistons, bearings, and seals.
What is a full engine rebuild?
A lot of people ask, “What does engine rebuild mean?” and it means that an auto mechanic takes out the entire engine and disassembles it, inspects it, and cleans it, and then replaces any parts that are damaged with new or refurbished parts.
How much is a bottom end rebuild on a dirt bike?
When you are using OEM parts, which includes all new bearings throughout the engine, a cylinder head, new valvetrain, new crank, new piston, new cam chain and tensioner, and a freshly honed cylinder, the cost comes to $1300 to $1500.
How much do rebuilt engines cost?
between $2,500 and $4,500Cost of Rebuilding or Replacing an Engine In a very general sense, you can expect the cost of rebuilding your engine to run you anywhere between $2,500 and $4,500 depending on parts as well as labor. If you are capable and handy, rebuilding your own engine will obviously run on the lower side.
What is considered the bottom end of an engine?
The engine block - also known as a cylinder block - contains all of the major components that make up the bottom end of a motor. This is where the crankshaft spins, and the pistons move up and down in the cylinder bores, fired by the fuel combusting. On some engine designs, it also holds the camshaft.
How long does a bottom end last on a 2 stroke?
On the flip side, you may get 500+ hours on the stock bottom-end. The harder you ride (high RPM), the shorter it will last. Also, not using enough 2 stroke oil or having a clean and properly oiled air filter will greatly reduce the life of the bottom-end.
How long does a yz250 bottom end last?
The last bottom end lasted 360 hours with the clutch at 400 hours.
How many hours does a 2 stroke last?
How many hours on a 2 stroke top end? A 2-stroke piston can last over a hundred hours if the bike was casually ridden and properly maintained, but an aggressive motocross racer can wear out a top-end in less than 20 hours of ride time.
How long does a 2 stroke crank last?
It's all relative to maintenance and how you ride obviously, but as a rule of thumb, with a good maintenance schedule 250 2-strokes usually can go 100-150hrs on cranks.
What is the top end of a piston?
Top end refers to the piston and cylinder. Generally a top end involves replacing the piston, piston ring, honing the cylinder if required, refreshing the gaskets and replacing Reed valves. The bottom end refers to the conrod, and is Basicly a full rebuilt.
What is the engine block?
The engine block - also known as a cylinder block - contains all of the major components that make up the bottom end of a motor. This is where the crankshaft spins, and the pistons move up and down in the cylinder bores, fired by the fuel combusting. On some engine designs, it also holds the camshaft.
Is bottom end 2 stroke bad?
Re: Bottom end 2 stroke Any vertical movement in the crank bearings is bad, you can check this by removing the flywheel cover and pushing up /down on the flywheel. Also bad is any vertical movement at the rod/crank pin, but this will require removing the cylinder to inspect.
