Not necessarily. I'm a firm believer that you need to be extra careful on the break in period though. I've never rebuilt an engine, then jumped on it and rode it hard (usually 1 - 1 1/2 tanks of gas is good for break in) but I have never had an engine come apart on me right after a rebuild either. Now, back to the question. It depends on what oil the shop is using. I suspect it is a petroleum and if so 20:1 is on the rich side but acceptable. I have always broke my bike in on the oil I intend to use at the ratio I intend to use, just be careful with it the first few miles.
yes all engines hacve a powerband and powerband is jsut where the engine has the best performance im not sure what the rpm range is for the raptors powerband
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Their are very few physical advantages of having a rebuilt engine. The only actual advantage of having a rebuilt engine is that it is much cheaper than a new engine.
The correct mixture is 50:1 for run in motors. I would be suprised if your engine isn't run in unless its been rebuilt.
Your question really makes no sense. Normally a timing chain will last the life of the engine as replaced when the engine is rebuilt.
Jasper
Rebuilt engine for your Jeep Wrangler may price from 1k to 1.5 k $, depending on the condition of engine you choose.
Depends on the damage. They can be rebuilt if they are not wrecked so it can't be repaired
The car engine needed to be rebuilt.
The cam is the heart of the engine. If the cylinder heads can flow up to the valve lift, the duration controls where the power is made/and too a smaller part the lift control how much power is made in that powerband. AN old school rule of thumb is 10 degrees is equal to 500 rpm bump in powerband.
There is no such part called a power band. It's a term used to describe the power curve of a two-cycle engine.
This is done by manually shifting your transmission to keep the engine RPM's inside its "power band" (the highest area of horsepower and torque).