Help with paper for school. Parts list for top end rebuild.

I am writing a paper for my 101 eng class:prof: , and we have to compare two objects or things, whatever. I chose to compare the 2008 Yamaha WR450F and the 2008 Yamaha YZ250R. I was going to do a cost of ownership breakdown of the two bikes as part of my paper,so i was thinking about including basic maintenance costs as well as the cost for a basic top end rebuild. However, I have little to no experience with four strokes, so i was wondering if some one could give me a list of parts associated with a basic top end rebuild.

Thanks in advance.

7d7,

Happy to help (I'm a teacher myself!)

With my limited 4 stroke experience (done countless 2 strokes!) I'd reckon you'd be looking (normally, assuming nothing is broken) at things like:

Piston and circlips

Rings

Small end bearing

Wrist pin

Gaskets

This depends totally on what is actually worn/broken on a particular machine, but the above should be enough for your comparison/paper.

Good luck with it!

Greg

if there was anything I learned in college... it was to not get too geeky in GE classes. I'd tend to get more focused on the data, and not focus on what the exercise was really about.

the method of your comparison is what will get you a grade.

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if there was anything I learned in college... it was to not get too geeky in GE classes. I'd tend to get more focused on the data, and not focus on what the exercise was really about.

the method of your comparison is what will get you a grade.

So true. I went to a school very focused on engineering and there is no way an English teacher there would have know the difference between a piston and a spark plug. All the engineering students hated the humanities classes and the profs knew it. It seemed like whenever we would try to bring in something technical to that class we would get burned (low grade). Ahh but I digress. School has so little to do with learning something other than being good at school....its a shame.

School has so little to do with learning something other than being good at school

:thumbsup::p:cry::p

Yeah, I hear what you are saying and appreciate your opinion about school. But don't "write it off" completely!

The beauty of my subject area (timber/metal/technical drawing/construction) ..... it's all about building skills that help the kids in the future...... after school.

Jeez, they even get to make stuff they can use right throughout their lives. I'm still using tools I made in metalwork when I was 14/15 years old. I'm almost 44 now!

Greg

When comparing the cost of ownership between the 2T and 4T, one should factor in that your top end rebuilds will be 4 or 5 : 1 in favor of the 2 stroke.... meaning that you will likely do four top ends on a 2T before you do one on a well maintained 4T, atleast:prof:

So true. I went to a school very focused on engineering and there is no way an English teacher there would have know the difference between a piston and a spark plug. All the engineering students hated the humanities classes and the profs knew it. It seemed like whenever we would try to bring in something technical to that class we would get burned (low grade). Ahh but I digress. School has so little to do with learning something other than being good at school....its a shame.

don't get me wrong, I always found a way to enjoy GE classes....I took a speech communication class once, which was really good for meeting new lady friends. :thumbsup:

So true. I went to a school very focused on engineering and there is no way an English teacher there would have know the difference between a piston and a spark plug. All the engineering students hated the humanities classes and the profs knew it. It seemed like whenever we would try to bring in something technical to that class we would get burned (low grade). Ahh but I digress. School has so little to do with learning something other than being good at school....its a shame.

I am actually majoring in engineering.

don't get me wrong, I always found a way to enjoy GE classes....I took a speech communication class once, which was really good for meeting new lady friends. :thumbsup:

Very true. In both of my english classes I have met some pretty ladies. I always seem to find my self at tables full of them:thumbsup:

Also thanks for the info

I am actually majoring in engineering.

I think those who have already been.... realized that from your first post. :p

you'll get a better grade if you do your report about something an English teacher would enjoy. like pie or old books or white wine. Always know your audience.:thumbsup:

One more thing. What should the time between rebuild be? Say the bike was being raced. For two strokes I have always heard twenty hours,( I never rebuilt anything at 20 hours, no money), So what would the time be for a four stroke?

I think those who have already been.... realized that from your first post. :p

you'll get a better grade if you do your report about something an English teacher would enjoy. like pie or old books or white wine. Always know your audience.:thumbsup:

The man is a genius! He got the high GPA. Yeah I though I liked engineering too, until I realized that the cop that pulled me over (with a high school education) on my way to my engineering job makes more money and has better benefits.

The man is a genius! He got the high GPA. Yeah I though I liked engineering too, until I realized that the cop that pulled me over (with a high school education) on my way to my engineering job makes more money and has better benefits.

I wish. I needed every trick in the book. :thumbsup: .

government jobs seem real atractive right now. But, Police and firefighters get paid money for a reason. Although there have been some that abused overtime, the greater majority earn it.

The man is a genius! He got the high GPA. Yeah I though I liked engineering too, until I realized that the cop that pulled me over (with a high school education) on my way to my engineering job makes more money and has better benefits.

Here in mass some state police are making triple didget salaries. You know why? It is overtime for directing traffic. Some have made over 200,000 year.

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